Device of miniaturised construction for producing high pressure in a fluid to be atomised

A device with a small structure for generating high pressure in a fluid to be atomized

Full description

Background of the invention

This invention relates to a device for generating high pressure in a fluid. This device consists of a piston moving in a cylinder and a valve, both of miniaturised construction. The invention also relates to a high-pressure atomizer containing this device, and its use, preferably for medical purposes.

One of the objects of the invention is to make an instrument of this type and the atomizer containing the instrument of a simpler design, at a lower cost of production and adequate to its function.

And half of the French patent No. 390,699 2-A dispensing apparatus for distributing high-viscosity liquid products such as gels and also for distributing low-viscosity products. The distribution device, according to Figures 2 and 3 of this document, is provided with two valves: an inlet valve and an outlet valve. Valve plates are mounted on a valve spring to prevent product flow during the valve closing phases. Both valves are closed using an auxiliary force generated by a compression spring for each valve. Valve discs are placed so that they can move axially with respect to the hollow piston or with respect to the cylinder, respectively.

The dispensing device according to Figure 1 of French Patent No. 390,699 2-A also contains two valves, consisting of valve members in the form of cambered caps, from which extend fixing lugs with catch portions.

It is provided to install the convex surface cover inside the control hole in the radial wall. During the closing phase of these valves, the circumference of the cap has a convex surface in close contact with the outer surface of the radial wall in each case. During the opening of these valves, the convex cover is bent outward, forming a gap between the circumference of the convex cover and the radial wall, allowing an amount of liquid to pass through it. These convex covers are not mounted on a valve spring and are not capable of moving axially with respect to the piston or cylinder on which they are mounted in any case. The composition according to Figure 1 herein is satisfactory when used to dispense viscous products. This formulation is not reliable enough to dispense low-viscosity products, especially after a certain shelf life.

The distribution devices described in French Patent No. 390 699 2-A consist of two valves, either mounted on two valve springs and capable of moving axially, or not mounted on two valve springs and not portable axially.

One-half of U.S. Patent No. 718,345 4-A is a sprayer in which a hand-actuated trigger moves a hollow piston into motion in a cylinder. The valve member is placed freely within the piston, and in one embodiment (Figure 9a) the movement of the valve member is directed by the piston. Stop means are provided at the inlet end of the piston to limit the movement of the valve member.

In liquid chromatography, for example, relatively small amounts of liquid are usually moved under high pressure through a separating column. In addition, aerosols (aerosols) are produced in medical aerosol therapy, by atomizing or spraying liquid drugs to treat respiratory tract diseases in humans or to treat asthmatic conditions. On the other hand, high pressure is required in usually a relatively small amount of fluid to produce the small droplet sizes needed for an aerosol. In a dose-calibrated inhaler, according to US Patent No. 5,497,944, we spray a volume of

A fluid is fed through a nozzle with a small aperture under a pressure ranging from 5 to 40 MPa (about 50 to 400 bar) to produce an aerosol. The present invention is particularly applicable to dose metering inhalers and similar devices.

General description of the invention

According to one aspect of the invention, a device with a miniature structure is provided for compressing a fluid, and the device includes a cylindrical hollow piston (17; 22; 28, 31, 33) that is moveable in a cylinder (1) and is equipped with a path through it, where the cylindrical hollow piston contains On a widened portion (20, 33) at the inlet or outlet end, the inner diameter is larger than the inner diameter in the remainder of the hollow piston, and the hollow piston has an edge that is machined internally (19, 24); High pressure chamber (4) is located Inside the cylinder in front of the piston; A valve that operates without any auxiliary force arising from a spring, and contains a valve member (18, 23, 29, 37) that has a defined sealing surface at its inlet end. The valve member is oriented and installed in a way that allows movement axially within the hollow piston in its radiating part. The maximum diameter of the valve member is less than the inner diameter of the hollow piston at its radiating portion and greater than the inner diameter at the remainder of the hollow piston; A stop device (19; 24; 32) is provided at the outlet end of the expanding part of the hollow piston to keep the valve member inside the hollow piston; The valve is closed when the valve member rests on the specified anti-drinking surface, and is open when the valve member rests on the stop device at the outlet end of the radiating portion of the hollow piston.

In one embodiment the valve member is normally prevented from rotating about any axis that is transverse to the piston axis.

In another embodiment, the hollow cylindrical piston is movable in the cylinder and provides a path through which the fluid passes, and the high-pressure chamber located in front of the piston provides

The cylinder is filled with a fluid passing through the aforementioned path, and the inlet valve is directed in the path of the said fluid and moves with the piston, but it is also subject to limited directed movement along the axis of the piston between a closed position in contact with the valve base supplied by the piston and an open position that returns from the valve base, and the valve member is formed and directed So that it cannot rotate around any axis transverse to the piston axis, such that a pre-defined surface of it engages with the base.

In US Patent No. 5,497,944, a similar device is described and shown in which the check valve member is a ball, and in such an arrangement the ball can rotate during multiple operations. It has been found that the wear and deformation resulting from high pressure may permanently irritate the ball so that if a different part of its surface is used during successive sealing and sealing operations (because the ball is free to rotate about a transverse axis) there is a tendency for leakage to occur. This can be avoided by using the same surface of the valve member each time, thus allowing the valve member to stabilize at its base to ensure the desired seal. In a preferred arrangement according to the invention, the greater part of the valve member is cylindrical and oriented in a chamber (which may, for example, be the pumping chamber itself or may be a section of the interior of the piston) and the valve member cylinder has an end surface that contributes to sealing the valve it supplies Piston. Another disadvantage of the ball valve which can be avoided by taking advantage of the invention is that the cross-sectional area of the valve must be much smaller than the diameter of the ball and the guide cylinder in which it moves; This leads to a decrease in the force exerted by the valve member on the valve base resulting from the fluid pressure generated during the pressure stroke (forward movement) of the piston. It is preferable that the high force exerted by the valve member on the valve member and/or valve seat is partially deformed elastically to close any small gaps between them.

In the following description, the two terms use the inlet and outlet side or the inlet and outlet side relative to the main direction of fluid flow inside the tool. The term fluid includes both gases and liquids, but the present invention relates mainly to liquids.

The valve member is to some extent displacable on the hollow piston but essentially moves with it.

It is preferable that the shape of the valve member be symmetrical in rotation around a single axis, for example, it takes the form of a circular cylinder or a frustom. Its cross-section is somewhat less than the cross-section of the chamber in which the valve member is mounted in such a way as to enable it to move. This is achieved by one or more channels, preferably extending along the outer surface of the cylindrical valve member, or by using a valve member with a diameter somewhat smaller than the diameter of the chamber in which the valve member is installed in a way that allows it to move.

The valve member is oriented in the chamber in which it is installed in a way that allows it to move; The cylindrical valve member can rotate around its axis depending on the economy, but its axis remains parallel to the axis of the hollow piston. This results in a defined sealing surface at the inlet end of the valve member.

The distance through which the valve member moves relative to the hollow piston is determined by a stop or a stop device that keeps the moving valve member with the hollow piston.

In some embodiments of the invention where the stop is after the outlet end of the valve member,

At least one recess cavity may be required in the outlet end region of the valve member to allow fluid flow between the bumper and the valve member when the valve is open. The cavity, or each cavity, is located either in the valve member at its outlet end or in the stop in the hollow piston.

When the valve member rests on the bumper in the hollow piston, the valve is open. With the valve member resting on the specified sealing surface, the valve is closed.

In fact, a valve member arranged inside the hollow piston does not rub against the inner wall of the hollow piston. The valve member arranged directly in front of the hollow piston tip can rub against the wall of the main pumping cylinder of the tool. In this case, the valve closes

Effectively, it opens when the hollow piston moves, due to friction between the valve member and the cylinder wall.

It is preferable that the cylinder be made of plastics and the hollow piston made of metal or plastics. The valve member material is chosen, in terms of hardness, to complement the hardness of the hollow piston material. This material may be metal, ceramics, glass, gemstone, plastic, or elastomer. The valve member is preferably made of one piece.

When the fluid is absorbed, the high-pressure chamber is connected to the fluid supply via a hollow piston. During the intake stroke of the hollow piston, fluid flows through the hollow piston and pushes the valve member into the high-pressure cylinder chamber. During the exhaust stroke of the hollow piston, the valve base is sealed by a high-pressure seal on the specific watertight surface of the valve member.

The device according to the invention used to generate high pressure in a fluid is connected to the fluid source at its inlet end. The chamber with the current pressure is connected to another device in which the fluid is transmitted under high pressure. The hollow piston or cylinder is connected to a drive device that conducts a relative movement between the hollow piston and the cylinder and exerts the force required to generate high pressure.

In one embodiment, the preferred cylinder valve member may be so mounted as to enable it to move completely within the hollow piston. The outlet end of the hollow piston has an inner diameter larger than the inner diameter of the remainder of the hollow piston. The length of the expanding portion of the hollow piston is somewhat greater than the length of the valve member. The diameter of the valve member is essentially equal to the inner diameter at the radiating end of the hollow piston. The outlet end of the hollow piston is shaped internally to form a rim either on its total circumference or on part of its total circumference and acts as a stop that keeps the valve member inside the hollow piston. The base of the radiating portion that forms the base of the valve may be flat or conical. For example, it may take a flow cavity

Fluid in the outlet side of the valve member forms a graduated channel. A fluid flow cavity may form in the bumper, for example in the form of an indentation at the edge of the rim.

In a variant of this embodiment, the valve member may be arranged entirely within the piston.

The hollow at the edge of its entrance. The stop will then be located at the outlet end of the expanding part and the limiting sealing surface will be located on the formed flange at the inlet end of the hollow piston.

In another embodiment, the hollow piston consists of a thin-walled tube formed at its end that projects into the cylinder and provided with an encircling constriction at the end of the valve member's space. The cylindrical valve member is oriented and installed in a way that allows it to move in the space between the formed flange and the surrounding waist. Another thick-walled tube may be pushed into the inlet end of the hollow piston, its outer diameter equals the inner diameter of the hollow piston. This thick-walled tube is also firmly connected to the hollow piston, preferably extending to approximately the circumference of the hollow piston. The thick-walled tube acts as a displacement member and facilitates the absorption of fluid into the high-pressure chamber without the actual need for pressure. It is preferable that the tube be thick-walled made of plastic.

In a variation of this embodiment, the valve member may be completely mounted within the hollow piston at its inlet end. The bumper will then be located at the circumferential waist and the limiting sealing surface will be located at the edge formed at the inlet end of the hollow piston.

In another embodiment, the hollow piston consists of a thin-walled tube containing a thick-walled tube with an outer diameter equal to the inner diameter of the hollow piston and in fixed contact with the hollow piston. The thick-walled tube acts as a displacement member and facilitates the absorption of fluid without the actual need for pressure.

The inlet end of the hollow piston is wide. At the expanding end, the hollow piston is firmly connected to a closing member whose outer diameter is larger than the outer diameter of the radiating inlet end of the hollow piston. The closing member has a lower part

depression is open on the side opposite the expanding end of the hollow piston. At the base of the low part there is an opening that serves as an inlet for the fluid. The base of the depressed part may be conical or flat; It forms the specific waterproof surface.

The valve member coordinates in the lower part of the closing member; This valve is directed so that it moves an axial movement in the lower part. The outer diameter of the valve member is smaller than the inner diameter of the lower part, but preferably this diameter should be larger than the inner diameter of the hollow piston in the part that protrudes into the cylinder. The valve member may contain, at its outlet end, at least one cavity through which fluid flows into the chamber at normal pressure during the intake stroke of the hollow piston.

It is preferable that the stop of the valve member be the tip of the displacement member that protrudes into the expanding part of the hollow piston, or it is the place of transition from the non-radiating part of the hollow piston to the tip of its radiating inlet if the tip of the displacement member is located in the non-radiating part of the hollow piston.

It is preferable that the hollow piston with a widened inlet tip be made of metal.

It is preferable that the displacement member and the closing member be made of plastics. The valve member may be made of plastic or a metal material.

It is particularly important to use the device according to the biopsy to generate high pressure in a fluid in an atomizer to spray the fluid without the use of propellant-free spraying.

According to another aspect of the invention, an atomizer is provided for spraying a fluid, consisting of an upper housing part, a lower housing part, a pump housing, a nozzle, a blocking mechanism, a spring housing, a spring and a supply container. where :

The pump housing is fixed to the upper housing, at one end of which there is a nozzle member containing the nozzle.

It includes a device according to the invention comprising a hollow piston containing a valve member as described above,

The drive flange that holds the hollow piston is located in the upper housing,

The locking or ratcheting assembly which is located in the upper housing portion,

The spring housing containing the spring is located in the lower housing, which is rotatably mounted by a rotary bearing on the upper housing,

The part of the lower housing that is mounted on the spring housing in the axial direction

axial direction

Other aspects of the invention are mentioned in the attached protection elements, but changes and combinations of certain features can be made without deviating from the scope of the invention. Certain preferred features are specified in the child protection elements.

Other favorable features will now be described. Preferably, the vaporizer should be an inhaler with a calibrated dose.

The hollow piston valve member corresponds preferably to a device of the invention as set forth herein. It partially protrudes into the pump housing cylinder and is mounted in the cylinder in a way that can rotate axially. The hollow piston containing the valve member exerts a pressure of 5 to 60 MPa (i.e., about 50 to 600 bar), and preferably 10 to 60 MPa (i.e., about 100 to 600 bar) on the fluid at the high-pressure end at the moment of release. The spring.

It is preferable that the nozzle in the nozzle member be microstructured, i.e. produced using microtechnology. Microstructured orifice organs have been described, for example in US Patent No. 5,472,143.

The orifice organ consists, for example, of two plates of glass and/or silicon closely connected together, at least one of the plates containing a finely structured canal.

One or more microstructured channels connecting the inlet raft of a nozzle to its outlet end. And there is

At the exit end of the nozzle there is at least one circular or non-circular opening with a diameter of not more than 10 micrometers (um). The term scale in this regard refers to hydraulic diameter. The diameter of this type of tool is generally less than 100 micrometers, preferably 1-20 micrometers.

Spraying may be carried out using nozzles in the nozzle in directions parallel to each other or in an inclined direction relative to each other. In a nozzle member having at least two nozzle openings at the exit end of the nozzle, the direction of spray may be inclined with respect to each other

At an angle ranging from 20 to 160 (degrees), and preferably at an angle ranging from 60 to 150. And it has

Spray directions meet in the vicinity of the nozzle nozzles.

In the pump housing, a check valve with or without a spring bias may be provided between the nozzle orifice and the high-pressure chamber of the cylinder. This non-return valve closes the high-pressure chamber in the atomizer's resting state, protects the fluid from entering air and, if necessary, prevents the volatile component of the fluid from evaporating from the pump housing. The non-return valve opens itself as soon as the fluid pressure in the chamber with the current pressure exceeds a minimum value and the fluid flow begins; It closes itself as soon as the fluid stream empties. The non-return valve, for example, may be a ball valve. This valve may consist of a flexible plate that is clamped on one side and remains like a flap (dangling end) at the outlet end of the high-pressure chamber. In another embodiment, the valve may consist of a disk, preferably of flexible material, clamped along its circumference, and pierced with a pin. This hole allows the fluid stream to pass through it to reach the nozzle as soon as the pressure in the fluid exceeds a minimum value. After the fluid stream empties, the hole is closed again.

It is preferable to install the valve member at the end of the cylinder that faces the nozzle member.

The locking or ratcheting assembly contains a spring, preferably a cylindrical helical compression spring, as a store of mechanical energy.

mechanical energy. The spring acts on the driven flange as a jumping member whose movement determines the location of the blocking member. The distance traveled by the driven lip is precisely determined by an upper and lower bumper. It is preferable to tighten the spring with an external torque through a force stepping-up device, such as a helical sawtooth thrust cam. The force is generated when the upper housing part rotates against the spring housing in the lower housing part. In this case the upper housing and driven flange have a single or multiple sawtooth wedge arrangement.

Compositions of this general type are described in US Patent No. 4260-082 and German Patent Application No. 2291135.

The sealing member containing sealing and engagement surfaces is arranged around an annularly driven flange. This member consists, for example, of a plastic or metal ring whose shape changes inherently in the radial direction. The episode is arranged in

Level for right angles on the axis of the atomizer. After the spring is aligned, the sealing surfaces of the sealing member move toward the driven flange and prevent the spring from releasing. The dam member is operated by a button. The actuating bottom button is connected to the dam member. To operate the dam combination pushes

The operating button is oriented parallel to the plane of the ring, preferably in an atomizer; Thus, the changeable shape of the ring changes in the plane of the ring to release the lip for movement by the spring.

The preferred seal member and spring are described and shown in German Patent Application No. 195452267 filed by Microparts but assigned to Boehringer Ingelheim International GmbH.

The vaporizer may contain a mechanical counter consisting of a screw threaded spindle mounted on the spring housing. The shaft axis extends in the outer surface area parallel to the atomizer axis. The shaft is mounted, at its ends, by means of a rotating bearing on the spring housing. The shaft has teeth at the end closest to the upper housing. On the edge of the upper housing there is at least one cusp that engages the teeth at one end

Column when the two housing parts rotate relative to each other. It rests on the column with a slider equipped with a rotation prevention means and is engaged with its teeth.

The preferred meter is described and shown in German Patent Application No. 033.9 49 195 dated December 8, 2019, filed by Microparts but assigned to Boehringer Ingelheim International (GmbH).

The lower housing is pushed axially onto the spring housing and covers the assembly, shaft drive and fluid storage container. The position of the slide can be seen through a recess in the lower housing and can be read on a scale, for example on the lower housing.

When the atomizer is switched on, the upper housing rotates relative to the lower housing, i.e. the lower housing that holds the spring housing inside it. At the same time, the spring is compressed and aligned by the spiral drive cam, and the tooth assembly self-locks. It is preferable that the rotation angle represents an integer part of the angle, for example 180. At the same time, when the spring is aligned, the driven part of the upper housing moves a certain distance, pulling the hollow piston inside the cylinder into the pump housing, due to which part of the fluid goes from the storage vessel to the high-pressure chamber located in front of the nozzle.

By the action of gears, which consist of a piston at one end of the shaft and a rack or several racks on the edge of the upper housing, the relative movement of the two housing parts is activated and transformed. Rotational movement of the shaft and displacement movement of the slide on the shaft. Each time the atomizer is turned on, the lubricant moves a certain distance along the shaft.

The position of the lubricant indicates how much of the fluid to be sprayed has already been drawn from the storage container and how much is still available. The slide on the shaft can be reset if necessary using the resetting lug.

If desired, several (preferably collapsible) replaceable storage containers holding the liquid to be sprayed into the vaporizer can be inserted one by one and used. The storage vessel is not pressurized or not substantially pressurized. The fluid pressure in the storage vessel is in any case substantially less than the pressure generated by a mechanically operated atomizer in the high-pressure chamber. The storage container, for example, contains a liquid containing a drug

drug

A convenient receptacle has an outer portion that is fixed at the top and an inner portion that collapses when the fluid within is removed as described in U.S. Pat. No. 5,316,135.

The spraying process begins by gently pressing the start button. The dam structure then opens a way for the orbital part to move. The spring, after being aligned, pushes the piston to the pump housing cylinder. The fluid leaves the atomizer nozzle in the form of a mist.

The parts of the atomizer are made of... Suitable for performing its function. The atomizer housing and other parts, as far as their function allows, should preferably be made of plastic, for example by injection molding. Physiologically acceptable materials are used for medical purposes.

According to the invention, the vaporizer is used, for example, to produce medical aerosols without the use of propellant gases. It can produce an inhalable aerosol with a mass average particle size (droplet) of about 5 micrometers. These small particles (with an average particle size of less than 12 micrometers) are necessary to penetrate directly into the lungs. The amount discharged is preferably about 15 microliters.

The following active substances are disguised as examples of pharmaceutical compositions in the form of aqueous or ethanolic solutions, depending on the solubility of the active substance: Berotec, Berodual, Flunisolide, Atrovent, Salbutamol,

Budesonide, Combivent, tiotropium, oxivent and appropriate peptides.

Solutions may also contain pharmaceutically acceptable excipients.

The preferred device according to the invention is used to generate high pressure in a fluid and the preferred atomizer containing this device has the following advantages:

- The tool has a valve that operates without auxiliary force (produced by the spring)

It closes due to flow resistance on the valve member or due to friction on the cylinder wall.

The valve member is considered tight to pressures usually exceeding 3 MPa (30 bar).

- The valve member is made of one piece; It is easy to make and install.

- The valve closes very quickly due to the short distance traveled by the valve member to reach the specified sealing surface.

- The valve has a high sealing action.

- Because the symmetrical valve member is oriented so that it rotates about a single axis, a surface is produced

A sealing limiter that is impermeable to high pressure through a very large number of strokes of the hollow piston.

- The dead space of the current pressure chamber can remain very small.

- The vaporizer can be operated safely and easily even by untrained persons, to guide

Pulsator to operate the spraying process.

The vaporizer works without propellant gas and therefore does not pose an environmental risk.

- The fluid storage vessel is not pressurized or substantially non-pressurized.

The movement of the dam member is coupled to the rotary movement to direct the spring in a simple way.

- In a preferred embodiment the atomizer consists of low-wear mechanical components

Nothing else. Operates over long periods of time reliably.

- Because of the specific bearing surfaces of the rotated part, the amount of fluid is measured very accurately.

- The vaporizer can be made at low cost and easily installed.

- The mechanical timer works automatically when the vaporizer is turned on; It has a permissible tolerance that is not critical

uncritical of tolerance, easy to install and operate safely and reliably.

- The meter is inaccessible when the atomizer is used correctly and cannot be disabled

falsified by accident.

- The meter can be adapted to any number of fluid flows from the storage vessel and to several vessels

Different storage used with one atomizer.

- The meter is integrated into the atomizer and does not occupy additional space.

- There are no materials that can pass from the meter to the material to be sprayed.

Preferred embodiments of the invention will be described, for example, by reference to drawings where:

Brief explanation of fees

Figures 1a, 1b and 1c: Between the shapes in order is a longitodinal section

For a first embodiment of a pump used to generate high pressure in a fluid according to the invention, an oblique view of its hollow piston and an oblique view of its valve member;

Figures 2a, 2b and 2c are identical views of a second embodiment;

Figures 2d, 2e and 2f are identical views of a modification of the second embodiment;

Figure 3 represents a longitudinal section of a third embodiment; And

Figures 4a and 4b represent two longitudinal cross-sections of a dosed derivation administration

Calibrated according to the invention under different operating conditions.

The various embodiments of the pumping device have been described above in general terms but will now be appended in additional detail by reference to the drawings.

Detailed description

Figure 1A shows an inclined longitudinal section view of a first embodiment of the device of the invention used to generate high pressure in a fluid. In cylinder (1), the hollow piston (17) and valve member (18) appear in the closed position of the valve.

Figure (1b) shows an inclined longitudinal section view through the hollow piston (17) with the shaped end (19). At the outlet end of the hollow piston there is a widened portion (20) in which the valve member (18) is directed and mounted in a way that allows it to move axially. The entrance end of the widened part (20) shall be chamfered or level.

Figure 1c shows an inclined longitudinal section view of the valve member. Cylindrical (18). Both ends of the valve member are level and located perpendicular to the axis of the valve member. The valve member (18), for example, has four stepped channels or flats (21) on its outer surface. To facilitate flow. Fluid through the formed tip (9a), intoned lip. When the valve opens, the ends of the channels (21) are radially toward the inside of the lip. The edge of the valve member (18) that rests on the base of the hollow chamber (20) is chamfered.

The diameter of the valve member (18) is less than the diameter of the expanding part (20), and thus the valve member (18) can move without being limited by the expanding part (20) approximately.

To install the valve member (18), it is pushed into the expanding part (20) before the outlet end (19) of the hollow piston is formed.

To withdraw the fluid, the hollow piston is partially lifted from the cylinder, and as a result the valve opens on its own. The fluid flows through the cavity (7) in the hollow piston and pushes the valve member into the high-pressure chamber (4). To expel the fluid, the hollow piston (2) is pushed into the cylinder (1), and as a result the valve closes itself, at almost the same moment, and a high pressure is generated in the fluid.

Figure 2a shows an oblique longitudinal cross-section view of a second embodiment of the device of the invention used at high pressure in a fluid. In cylinder (1), the hollow piston (22) and valve member (23) appear.

In the closed position of the valve. The diameter of the valve member is less than the inner diameter of the hollow piston.

Figure 2b shows a view of an inclined longitudinal section through the hollow piston (22) with the machined outlet tip (24) forming the driven edge and encircling constriction.

(25). The thick-walled tube (26), which acts as a displacement body, may be forced into the hollow piston (22) and fixed inside it.

Figure 2c shows the valve member (23) at an angle. At the outlet end of the valve member there is an indentation extending towards the radius (27) in the form of a transverse slot to facilitate the flow of fluid when the valve opens.

Figure 2d shows an alternative image of the second embodiment in the form of an oblique longitudinal section. In cylinder (1), the hollow piston (28) appears, optionally with the displacement body (26), and the valve is in the closed position. The diameter of the valve member (29) is less than the inner diameter of the hollow piston.

Figure 2e shows an inclined longitudinal section view, through the hollow piston (28) with the formed outlet tip (24) and the surrounding waist (25). At least one notch (30) in the form of a recess or notch is provided on the formed outlet end (24) to facilitate the flow of fluid when the valve is opened. There may be convexity instead of grooves.

Figure 2f shows the valve member (29) at an angle. In this case, the valve member is a straight cylinder with no recesses.

Figure 3 shows an oblique longitudinal cross-section view of the third embodiment of the device of the invention used to generate high pressure in a fluid. In the cylinder (1), the hollow piston (31) appears, which contains a displacement body (32). At the end of the cylindrical radiating inlet (33) the hollow piston is installed with a closing member (34) with the lower part (35) and the bore (36). In the notch there is an axially moveable guide valve member (37), which may be provided with a slot (38) in the form of a cavity at its outlet end.

Embodiments of the device according to the invention used to generate high pressure in a fluid and shown in Figures 2a through 3 operate in the same manner as previously described by reference to Figure 1a.

Figure (4a) shows a longitudinal section through the preferred atomizer described in detail above in the case in which the spring is directed, and Figure (4b) shows a longitudinal section through the atomizer in the case in which the spring is fired.

The upper housing (51) contains the pump housing (52) on the end of which the holder (53) for the atomizer nozzle is mounted. Preferably, this fastening device is as described in German Patent Application No. 51-p19536903.3 dated October 4, 1995 (and a similar Patent Cooperation Treaty application filed at the same time as this application in the joint name of Boehringer Ingelheim International GmbH) International) and inventors). The fastener has a foot member (54) and a filter (55). The hollow piston (57) mounted in the cup-shaped driven flange (56) of the seal assembly (57) partially protrudes into the pump housing cylinder. The hollow piston carries a valve member (58) at its end. The hollow piston is sealed by means of a drinking stop (59). Inside the upper housing portion is the annular mount (i.e. the opposite annular protrusion (60) on the lip) on which the lip rests when the spring is released. On the pivot end of the cup-shaped driven flange is the mount (61) which holds the driven flange when directing the spring. After guiding the spring, the general annular seal member (62) moves between the mount (61) and the support (63) in the upper housing portion, either by its elasticity or (or when more rigid) by an external spring (not shown). The operating button (4 6) is connected to the dam member, which may move physically or out of shape to release the anchor (61). The upper housing part ends with the mouth piece (65) and is closed with a protective cap (66) on which it can be installed.

The spring housing (67) with compression spring (68) is mounted in a rotatable manner on the upper housing by means of a snapping lug (69) and a swivel bearing. And he pays

The lower housing portion (70) is over the spring housing and rotates with it to operate a spiral toothed cam drive (not shown) to cock the atomizer (moving it from the location of Figure 6B to the tip of Figure 6A). Inside the spring housing there is a replaceable storage container (71) for the fluid (72) to be sprayed. The storage container is provided with a stopper (73) through which the hollow piston protrudes into the storage container and its tip is immersed in the fluid.

The shaft (74) of the mechanical counter is installed on the outer surface of the spring housing. At the end of the shaft opposite the upper housing, there is a drive pinion (75). The sled (76) rests on the pole.

The embodiments shown in the drawing may change. The parts may be used together in a manner different from the method shown in the drawing.

Example (1): A miniature high-pressure device used in a cosmetic atomizer

cosmetic atomizer

The valve portion of a cosmetic atomizer according to Figure 1a consists of a cylinder made of polyetherether-ketone having an inner diameter of 2.5 millimeters (mm) and an outer diameter of 8 mm. The high-pressure chamber is closed by a nozzle carrier plate. On this board there is a nozzle with a diameter of 25 micrometers and a nozzle channel length of 2 mm.

A hollow piston made of reinforced plastics with an outer diameter of 2.48 mm and a bore of 0.5 mm is pushed into the cylinder. The hollow piston can be pushed into the cylinder a distance of 45 mm, with a stroke of 24 mm. The hollow piston is drilled to an internal diameter of 1.85 mm along a length of 5.0 mm at the outlet end. The base of the chamber formed in the hollow piston is beveled. The shape of the outlet end of the hollow piston changes thermally.

The valve part is a cylinder made of polypropylene, 3 mm high and 1.6 mm in diameter. There are four graduated channels in an image

Cavities in the outer surface. The valve member may be displaced axially by about 0.5 mm within the hollow piston.

The delivery volume is equivalent to about 116 mm3. The pressure in the fluid is about 3 MPa (30 bar).

This vaporizer is used to spray hair spray.