Nova Patents
US2652902A

Bag support and motor shield for suction cleaners

Abstract

This record has no abstract on file.

US2652902A, drawing sheet 1
Sheet 1 of 1

Term

Term ended

Expired 22 September 1970, 56 years ago.

  1. Priority and filed
  2. Granted
  3. Expired
  4. Today

3 claims: 3 independent, 0 dependent

  1. 1
    What I claim as new and desire to secuie by Letters Patent of the United States is:1 In a suction cleaner of the canister type having a substantially cylindrical body with a central air inlet opening at its top end, a dust filtering bag made entirely of porous flexible material positioned within the body adjacent and below said opening, and a motor and fan unit centrally located in the bottom of said body ’ beyond said filter bag, that improvement in a bag supporting air deflector and motor shield comprising an inverted generally cup-shaped substantially rigid member axially aligned with said inlet opening and positioned between the bottom of said filter bag and the top of said motor, said support and shield member being spaced from the side walls of said body, the space between said cup member and the side walls forming an annular dust-collecting pocket in said bag surrounding said inverted cup, a convex imperforate end wall deflecting area on said cup member positioned opposite the inlet opening under the bag, said cup member extending over and around the sides of said motor and said member having perforations therein outside of said imperforate area.
  2. 2
    In a suction cleaner of the canister type having a. generally cylindrical body with a central inlet opening at its top end, a dust filter10 IT threaded into the shelf 15. The nature of this bag support and motor shield is of the utmost importance in my invention. Sheet metal is the preferred material. It will be seen that it is generally in the form of an inverted cup with a convex surface at its top directly opposite the air inlet opening 8 of the cleaner. This convexity may be emphasized to the point where it becames almost a cone. However, sharp points or edges are to be avoided for obvious reasons. In the center of the top of the bag support mtbe area opposite the air inlet which is subjected to air of the highest velocity from the inlet, this bag support is left entirely unperforated and solid so that air or particles will not pass therethrough. Also by reason of being solid, no air or air and dirt mixture is urged by suction to flow toward this top area, but is urged to flow radially outwardly. This solid area is indicated by the portion bracketed and numbered 18 in the drawing Outside of the area 18 the bag support is provided with a plurality of perforations 19 closely spaced and extending well down over the sides of the bag support opposite the sides of the motor 10 In the form shown in Fig. 2, the perforations in the sides of the bag support are m the form of elongated slots 20 which have been found convenient for purposes of manufacture and for this reason are preferred. For additional protection to the motor, a second solid imperforate annular area 21 is provided around the motor shield opposite the brushes 22 of the motor, spaced from the solid area .8 by some of the perforations 19. This band will prevent damage to electrical parts which otherwise might occur if a hairpin or similar article should puncture the dust bag or filter at this point. The dust filtering and collecting arrangement shown here is of the character shown and claimed in the patent of Archie E. Smith, No. 2 591 382, and assigned to the same assignee as the present invention. This dust bag is m efiec two bags, an outer cloth filter 23 supported by a rigid ring 24 from the top edge of the cleaner body and an inner disposable bag 25 located m- j side of the bag 23 and supported at its top end by a bag supporting dome or bell 26. A resilient compressible gasket ring 27 surrounds the supporting ring 24, seals this ring around the top of the cleaner body, and supports the bell or dome ; 26 on its upper surface. A second resilient com pressible gasket 28 is carried by the cover around the opening 8, holding the disposable bag 25 against the bag support 26 and pressing the bottom edge of the support 26 against the gasket 27 when the cover of the cleaner is clamped m place. In operation of the cleaner, air will be drawn in through the inlet fitting 7, be discharged downwardly through the opening 8 and some air will strike the area within the filtering bag or bags immediately above the convex imperforate section 18 on the bag support and motor shield. Any hard particles will be harmlessly deflected toward the annular pocket 29 which :^rroimds the bag support. The convex or conical.nature of the top of the bag support assists m this de flection and in redirecting the air so that a swirltag action of air will be obtained in the annular pocket area of the bag or bags. Dust will, therefore, collect first in the pocket 29 and upon continued operation of the cleaner air will pass through the bag and through the openings 19 near the top of the motor shield even though me bottom of the pocket is filled with dust. Also there will be no tendency for air to be drawn di20 2.5 _ S,652,902 bE ?lade entirely of porous flexible mateSw EiH°ned Within the body adjacent and centra nv din?P!T®’ Έ a motor and fan unit centrally located m the bottom of said body that improvement in a bag nrfsteinn alr d®flector and motor shield coman mverted rigid cup member axially between EVE mlet opening and positioned between the bottom of said bag and the top of *aid motor, said support and shield member being spaced from the sides of said body with of s£dChnbrftWf6en Said CUp member and the sides ιη™Λ y formms an annular dust collecting pocket m said bag surrounding said inverted cup a convex imperforate central end wall deSeEtrEE® on.said cup positioned opposite he inlet opening in said body under the bag sidesCof ^fmber extentflng over and around the sides of said motor, a second imperforate area surro™ding said cup member but ®pad fr°m said imperforate end wall surface and said member having perforations therein between and below said imperforate areas wheremypmha°mitg air iS deflected around said cup member into said annular dust collecting pocket by said imperforate surfaces and the bag is supported and the motor is shielded by said cup member. * u
  3. 3
    In a tank type suction cleaner having a substantially vertical cylindrical body with a central· inlet opening at its top end, a dust filtering bag made entirely of flexible porous material Number 2,031,454 2,242,278 2,539,195 Number 524,095 β the bOdy adjacent and below ,°.pen“g’ a bag support in the body in the and &1Γ fl°W bey°nd and below the bag, tOr and fan unit beyond and below he bag support, that improvement in the bag IhiSE’ “ deflectinS air and in mounting and ηηί·??115 tbe motor comprising said bag supcm\heanpdS^antlany rigid’ generalIy inverted Ped and.axlaUy aligned with said inlet opening and having a convex imperforate central end deflecting surface positioned under thTbag opposite the inlet opening and perforated surelsewhere on said support, said support ® nEdmg over and around the sides of said motor and engaging said motor and means securing said bag support to said body sE securing means thereby also fastening said motor nnd fan unit m said body. ROBERT E. SHEAHAN. References Cited in the file of this patent UNITED STATES PATENTS Name Date Belde et al.--------Feb. 18, 1936 Yonkers, Jr.--------May 20, 1941 Lang---------------Jan. 23j 1951 FOREIGN PATENTS Country Date Germany----------July ιθ, 1927
Independent claims3