Valve for syringes, atomizers, &c.

°·⁷²³’⁰⁴²· PATENTED MAR. 17, 1903.

: 8. SCHWERIN.

VALVE FOR SYRINGES, ATOMIZERS, &c.

. ' APPLICATION TILED MAE, 19, 1901

NO MODEL, . · ' '

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United States Patent Office.

SILAS SCHWERIN, OF BELLEVILLE, NEW JERSEY, ASSIGNOR TO HARDMAN ... RUBBER COMPANY, A CORPORATION OF NEW JERSEY.

:): ' ) VALVE FOR' SYRINGES,· ATOMIZERS, &amp;,c.

SPECIFICATION forming part of letters Patent No, 723,043,’dated March 17,1903.

^s / . Application filed Maroh 19,1901. Serial No. 61,837. tNomodel.)

To all whom it may concern:

Be it known that I, Silas Schwerin, a citi-·. zen of the United States, residing at Belleville, in the county of Es&amp;ex and State of 5 New Jersey, have invented certain new and useful Improvements in Valves for·Syringes, Atomizers, &amp;e.; and I do hereby declare the following to be a full, clear, and exact description^ the invention, such as will enable io others skilled in the art to which it appertains to make and use the same,ref erence being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

^r5 This, invention has reference to improvements in valve.connections, for syringes, atomizers, and the likh; and the invention has. for its primary object to provide a novel fitting for syringes, and atomizers constructed so for connecting the end of a flexible piece of tubing with the neck of a syringe or atomizer bulb, the. said fitting being of stich construction that when it is secured in position and connected with the member of the valve-fit25 ting over which the said flexible neck of the bulb is placed the said first-mentioned valvefitting will encompass the outer cylindrical surface of the said¹ neck of the bulb. By this means tne flexible neck of the bulb is pre30 vented from being distorted and forced out of shape by the manipulations of the bulbs of the syringes or atomizers, and ^ comnlete and perfect inclosure is providedlat the connection of the bulb and the flexible inlet or in35 duction and outlet or eduction pipes to prevent leakage, as heretofore, which is;due to the loss of the life of the rubber neck when not inclosed or when but partially inclosed by means of the metallic fittings as hereto40 fore made can be forced from its position by the distortions of the bulb^yhen squeezed, and the fitting is soon rendered, useless in that it does not prevent leakage at the joint.

The primary object of this invention, there- 45 fore, is to fully overcome this objection, and, further, to provide a novel construction of valve-fitting and novel valve therein which can bo cheaply made, the parts being capable of quick assemblage, and the same construc5° tion of valve, usually termed the “tack,” be ing capable of use in either fitting at either end or neck of the flexible bulb of a syringe.

The present invention, therefore, consists in the novel construction of valve-fitting and valve, as well as in the novel arrange- 55 ments.and combinations of the parts thereof with the flexible, neck or necks of a syringe or atomizer bulb, all of which will he fully described in the accompanying specification and then finally embodied in the clauses of 60 the claim, which are appended to this specification.

The invention is clearly illustrated in the accompanying sheet of drawings)in which—

Figure 1 is a view, of an air reservoir or 65 bulb usually employed in the ordinary form of syringe, the same being shown provided with an inlet and outlet valve of my novel form and construction; and Fig. 2 is a longitudinal vertical section of the several parts 70 represented in said Fig. 1 to more clearly illustrate the general arrangement and construction of the various parts of the valve-, fittings. Figs. 3 and 4 are the two end views of a syringe-bulb, illustrating in position in 75 the respective necks of the same the valve members, which are secured directly within the tubular portions of the said necks; and Fig. 5 is a perspective view of the valve or tack which is to be used with either fitting 80 represented in said Figs, l and 2.

Similar numerals of reference are employed in all of the said above-described views to indicate corresponding parts.

In the said drawings, 1 indicates the air res- 85 ervoir or bulb of a syringe, the same being made from flexible material, such as rubber, and 2 and 3 are the usual inlet and outlet tubes, respectively connected with the necks 4 and 5 of the said bulb by means of the valve- 90 fittings 6 and 7, embodying the principles of this invention. The construction and arrangement of the said valve-fittings 6 and 7 are as follows: Each fitting consists, essentially, of a primary member 8, which has a centrally- 95 •arranged duct 9, substantially as shown in saidJFig. 2 of the drawings, the member 8 of the fitting 6, however,.being provided with a cone-shaped valve-seat 10, which is dispensed with in the member 8 of the valve-fitting 7, too

723,042 said member in this instance being provide^ with an annular inner shoulder 11, formed by. the suitably-enlarged recessed portion 12 in said member. Within each of said necks 4 5 and 5 of the bulb 1 is arranged a secondary member 13, each member being provided with a centrally-arranged duct 14, an enlargement 15attheoneend andanannularscrew-threaded shoulder 16 upon the other end of the metnto her, as shown. The secondary member 13, arranged within the neck 4 of the bulb 1, is provided with a recessed portion 17, formed by the flat annularshoulder 18, as shown, said recessed or chambered portion 17 being of 15 greater cross-area than the cross-area of the duct 14 in said member. The secondary member 13, which is arranged within the. neck δ .of the bulb 1, is provided with a cone-shaped valve-seat 19 in place of the said recessed or 20 chambered portion 17, as will be clearly seen from an inspection of said Fig. 2.

Each primary fitting 8 is provided with an J annular outer shoulder 20 and an extension 21, which is provided with an enlarged end 25 22, over which the ends of the respective pieces of tubing 2 and 3 are fitted and secured in position. The main body portion of each fitting or member 6 is preferably made tapering, as shown, being provided with an annular pror 30 jection 23, which forms a rib or projection and has the annular extension 24extending therefrom, as shown. Within each extension 24 and extending for some distance into the main body of the member 8 is a chamber which is 35 provided with an internal screw-thread 2u;

The chamber in each member 8 terminates in a flat shoulder 27, directly in front of the valve-seat 10 in the valve-fitting 6 and directly in front of the enlarged depression 11 40 in the valverfitting 7, a suitable soft-rubber washer or other gasket 26 being arranged between the said shoulders 27 of the members 8 and the outer end portions of the said tubular members 13.

Within each fitting 6 and 7 is a valve or tack 28, the same being provided with a stem 29 and an inclined or cone-shaped portion 30' for seating the valve upon the respective valve-seats 10 and 19 for the usual purposes: 50 of closing the duets through the valve-fittings, i

The head 31 of each valve 28 is made with the curved or concaved surfaces 32 and the; projections 33, providing the concave openings 34, which are preferably of a semicircu55 larconfiguration, as clearly illustrated in said

Figs. 2 and 0.

The operations of the two valves will be fully understood from an inspection of Fig. 2, the bulb 1 when expanding after having 60 been compressed causing the valve 28 within the fitting 6 to assume the position shown, with the projections 33 forced directly against the shoulder 18 within the member 13 in the neck of the bulb and the valve 28 within the 65 fitting 7 being forced against the valve-seat 19, as shown, whereby the liquid will pass from the tube 2 through the member 6 and the semicircular openings and depressions 32 in the valve-head in the direction of the arrow® into the interior of the bulb. The bulb 70 1 thereupon being again compressed in the usual manner, the back pressure !rom the liquid within the bulb will cause the valve within the fitting 6 to be closed down upon the valve-seat 10 within the member 8, and the 75 valve in the fitting 7 will be forced from its valve-seat 19, with the projections 33 on the valve-head in contact with the annular shoulder 11 of the enlarged depression or chamber 12 in the members of said fitting 7. The 80 . liquid will thereupon pass from the bulb 1 in the direction of arrow y through the open valve and the semicircular openings 34 into the outlet or eduction pipe 3, as will be clearly evident. 85

From the above description it will be clearly evident that I have provided a novel construction of induction and eduction valve for syringes, atomizers, or for other purposes the several parts of which are quickly assembled 90 and the same valve or tack being capable of use in either valve-fitting, whereby in cleaning the valve-fittings no great care is necessary in replacing the valve in either of the valve-fittings, since the valves are inter- 95 changeable and either valve can be operatively arranged in either fitting. A further advantage is that the member 8 of each fitting being provided with the chambered portion 24 when screwed upon the screw-thread- 100 ed shoulder 16 of the member 13 will screw itself upon the outer cylindrical surface of the soft-rubber neck at the ends of the bulb, 'and thereby provide a perfect and tight joint, iree from leakage when the bulb is com- 105 pressed, and the neck with constant use of the bulb will not become distorted and rendered useless, as is generally the case in the constructions of valve-fittings for syringes as now made, and the syringe or atomizer will no last much longer.