US2331161A

US2331161A - Valve for carburetors

Info

Publication number: US2331161A
Application number: US406789A
Authority: US
Inventors: Paul P Bauernschmid
Original assignee: Chandler Evans Inc
Current assignee: Chandler Evans Inc
Priority date: 1941-08-14
Filing date: 1941-08-14
Publication date: 1943-10-05
Anticipated expiration: 1960-10-05

Description

Oct. 5, 1943. BAUERNSCHWD 2,331,161

VALVE FOR CARBURETOHS Filed Aug. 14, 1941 Patented Oct. 5, 1943 UNITED "s r-Ares PATENT OFFICE.

to Chandler-Evans Corporation, a corporation of Delaware Application: Au ust '14, 19h," Serial Nb. j oavs sig 14- o1aims (Grim-r2) .1

1. My inventionirelatesxto v'alves fcr carburetors. It has among its objects to provide animproved throttle mechanism for, carburetors and; more rti u y, such a throttle mechanism especially adapted cause in connection with airplane car- I buretors. A further object of my invention is to providesuch a throttle mechanism adapted to. use in sucha carburetor having large rectangular'air p ssage means leadin to the engine and adapted to control the air flowtherethrough t the engine in an improved manner; Other objects tot my invention are toprovide such a throttle. mechanism having throttle members of an: improved .construction; and j ournaled in an improved manner at their opposite ends and intermediatev their ends, and also havingimproved sealing means for the throttle members attheextremities thereof and adjacent the intermediate journal thereof. Other objects and advantages of my;.improve-. ments will hereinafterrnore fully appear.

In th accompanying drawing, I have shown for purposes of illustration one embodimentwhich my invention may assumeinpracticet I g Inthis drawing:

Figure 1 is an end elevation, partially'in section, of a carburetor equipped with myimprovement; a

Fig. 2 is an enlargedsectional view on line 2-2 of Figure 1; 'l f f Fig. 3 is an enlarged detailsectional View on line 3-.3 of Figu'rel; i

Fig. 4 is a detail; partiallyin section, showing one of the. end seals and its associatedjournal mechanism and a I a Fig. 5 is a section on line[ 5--5 of Figure l' on a somewhat reduced scale showing the' throttle members in the fully open position shownin Figure .7

In this illustrative construction, I have shown my improvements embodied in a carburetor cas ing l havinga rectangular air"flow passage 2 therethrough; my improved throttle members,

gen'erallyindicated at 3,;being adapted to control the air flow through said passageand' journaled at their ends in the casing l and intermediate their ends in a transverse septum 4 in thepa'ssa'ge z'between the fuel inlet or fuel bar 5 and "suitable rectangular Venturi mechanism; generally indicated at 6, and said'throttle members 3 being operated from any suitable operatingmember 1 through usual cooperating meshing geared-sec-' t0rs8.

Referring more particularly to the throttle members 3, it will bevnoted that each ofv'thesame comprises a shaft S carrying at longitudinally spaced thereonlel ongated generall e 1lip. tical hollow members It! suitably fixed as by-rivets It to theshaft 9 and tapering, therefrom. to

parallel edge portions .12 to provide. generally elliptical. hollow throttle members. As shown, each otthese-members H! abuts at itsopposite end an annular memberv or disc 13 and has [each edge-l2 of the throttle-member extended slightly beyond theperiphery of this disc. Of these. discs 'l3,.the discs at the inner ends of the'kthrottle members 10 fit snugly on the shaft 9 and abut opposite sides o'f'a, middle bearing sleeve [Lfixed to this shaft as by a rivet l5- Herein, this sleeve it is journaledin split bushings l6 heldtogether by a springring I] and mounted in a transverse aperture [8 in the transverse septum 4. The

discs I3 at thev outer ends of the throttle members,

on theother hand, are carried on reducedpor tions l Son the shaft9 andabut ball bearings 20 carried on asmaller bearing sleeve 21 on an adjacent reducedportion 22 of the shaft.

.O peratively associated with each end of each.

throttle member, and, more particularly, with the disc l3 at each end thereof, is improvedsealing means.v Herein, these sealingmeans atthe inner ends of the. throttle. members include peripheral flanges 23 on opposite, sides of the split bearing members 16, receiving and providing journals for the peripheries of the discs I3. Similarly, at their outerflends, the throttle members have their discs l3 journaled inperipheral flanges on cup memhers/25 and-26 receiving the .ball bearings 2 llan'd suitably fixed to

suitable end plates

21 and 28 attachedto the casingv I. Herein, the cup25, which is adjacent the gears 8, ,,is longer than the cup ZB andha a lurality' of oppositely disposed loading springs 29,:betweenthe end wall O the same and the ball bearing 2!], 'a like construction being provided on the right hand ends of both shafts 9. The cup 2Q, on the other hand, snugly fits agal'nst theendofthe bearing 20' and has a single'loading spring 30 carried one collar 3| suitably fixed to the shaft. and positioningthe,bearing 20;, this spring herein acting against-= afsuitable abutment face 32 on thefend pl ate;28, and'a suitable washer 33 and packing seal 34 between thesame'and the end of the'cupf A t thisend of'the shaft 9 which also c'arries the operating member 1,; a packing gland 35' is also provided around are'duced portion on the shaft 9an'd held in sealing position bya coiled spring 36 acting between the'same andianabutment 31 fixed to an adjacent portion of thezshaft 9. The like endof the othershaft 9, while provided with a like cup 26; has no seal or springs, asshown irrFigure 3. r a

In the use of the throttle members, it will be apparent that as the same are rotated by their operating member I and gears 8, the shafts 9 will rotate in their ball bearings at the opposite ends of the shafts, while the sleeves I4 provide journals intermediate the ends of the shafts. Further, the discs [3 provide sealing means at opposite ends of each throttle member I, these discs rotating inside their cooperating

peripheral flanges

23 and 24 in such manner as to prevent the passage of air through the throttles at either end of either throttle member [0. Attention is also directed to the fact that the sealing relation between the discs and annular flanges is maintained by the loading springs 29., these double loaded springs acting to maintain the desired sealing relation, despite longitudinal expansion or contraction of the parts. Attention "is also directed to the fact that these springs further act to take up wear at the opposite ends of the shaft and thereby maintain the desired seal-ing relation.

As a result of my improved construction, effective seals are provided at the ends of the throttle members in such manner that with the seals previously provided along the outer edges of the throttle members, any leakage along either the ends or sides of the throttle member is effectually prevented. At the same time, it'is made possible to provide the throttle members in the form of light, hollow bars and also to journal the same, not only at their ends, but between their ends in such manner as to insure proper operation of the same under all conditions. Attention is also directed to the facility with which the throttle members may be assembled, it being possible, after the assembly of one end plate, as, for example, the end plate 21, to slip the throttle bar assembly into the operative position illustrated in Figure 2 and thereafter to insert the cup 26 and spring .32, after which the end plate 28 may be secured in position. These and other advantages of my improved construction will, however, be clearly apparent to those skilled in the art.

While I have herein specifically described one embodiment which my invention may assume in practice, it will be understood that the same has been shown for purposes of illustration, and that the invention may be modified and embodied in other forms Without departing fromits spirit or the scope .of the appended claims.

What I claim as new and desire Letters'Patent is:

1. In a carburetor, a casing having air passage means, a throttle member in said passage means and journaled in said casing, and sealing means for the opposite ends of said member, each of said sealing means includin cooperating cup and cup closure members, said cups being ,fixed to said casing and surrounding said journals and said cup closures being rotatable with said member and axially movable in said cups.

2. In a carburetor, a casing having air passage means, a throttle member in said air passage means and .journaled in said casing, sealing means for the opposite ends of said member having cooperating elements respectively carried on the walls of said air passage means-surrounding the member journals therein and on said throttle member around h axis thereof, and spring means acting on one element of said sealing means .for maintaining said sealing means in sealing relation.

3. In a carburetor, acasing having air passage to secure by means, a throttle member in said air passage means and journaled in said casing, cooperating sealing elements for one end of said member, one carried by said casing and surrounding the journal therein and the other by said member and surrounding the axis thereof, and oppositely acting spring means for maintaining said sealing elements in sealing relation irrespective of relative longitudinal movement of the parts due to temperature variations.

4. A throttle member for carburetors comprising a shaft, a journal carried on said shaft intermediate the ends thereof, discs spaced longitudinally on said shaft at opposite ends thereof and at opposite ends of said journal, and generally rectangular throttle members enclosing the portions of the opposite ends of said shaft between the pairs of discs on opposite sides of said journal.

5. A throttle member for carburetors comprising a shaft, a journal carried onsaid. shaft intermediate the ends thereof, discs'spaced longitudimany on said shaft at opposite ends thereof and at opposite ends of said journal, generally rectangular throttle members enclosing the portions of the opposite ends of said shaft between the pairs of discs on opposite sides of said journal, and sealing means between said journal and the discs adjacent the latter.

6. A throttle member for carburetors comprising a shaft, discs spaced longitudinally on said shaft, a generally rectangular throttle member enclosing said shaft between said discs, and sealing meanscooperating with said discs at opposite ends of said throttle member and having open ends in which said discs are axially movable.

'7. A throttle member for carburetors comprising a shaft, discs spaced longitudinally on said shaft, a generally rectangular throttle member enclosing said shaft between said discs, bearings at opposite ends of said shaft adjacent said discs, and sealing members enclosing said bearings and said discs and having the latter axially movable in said sealing members.

8. A throttle for carburetors including a throttle shaft, longitudinally spaced generally rectangular throttle members thereon, an intermediate journal member between said throttle members, end journal means at opposite ends of said throttle shaft, discs at opposite ends of each throttle member and carried on said shaft between said throttle members and said intermediate and end journal means, and sealing means cooperating with said discs including flanged cups housing said end journal means and oppositely directed flanges on said intermediate journal means.

.9. ,A throttle for carburetors including a throttle shaft, longitudinally spaced generally rectan'gular throttle. members thereon, journal means between said. throttle members compris ing a journal sleeve enclosing said shaft between said throttle members, discs between the opposite ends of said throttle members and said sleeve, and cooperating split journal members enclosing said sleeve, and spring .means holding said split journal members insaidenclosingrelation.

10. A throttle for carburetors including a throttle shaft, longitudinally spaced generally rectan ular throttle members thereon, journal means between said throttle members comprising a journal sleeve enclosing said shaft between said throttle members, discs between the opposite ends of said throttle members and said sleeve,

cooperating split journal members enclosing said sleeve, spring means holding said split journal members in said enclosing relation, and sealing flanges on Opposite ends of said split'iournal members cooperating with said discs.

11.- In a device such as described, a casing having a passage with a planar limiting wall, a shaft Q journaled in said wall" in perpendicular relation sealing elements being capable of relative axial movement.

12. In a carburetona casing havinganair passage therethrough, a throttle member in said air passage journaled in said casing, and sealing means for an end of, said throttlemember including cooperating cup and cup-closure elements, one of said elements being carried by the casing and surrounding the journal therein, and the other-being carried by the throttle memberand surrounding the axis thereof and axially ovable with respect to said first sealing element;

13. In a device such as described, a casing having a passage with a planar limiting wall, a shaft having an end journaled in said wall, a flap valve carried by said shaft'and provided with sealing means constituted, by an end wall in close proxv imity to the planar wall, and additional sealing means in the planar wall, said two sealing'means being relatively axially movable.

14. In a device such as described, a casing having a passage with a planar wall, a' shaft perpendicular to said wall and journaled therein,- a

flap valve on said shaft havingan end wallin close proximity to the planar wall, and a sealing member receiving the end wall of the valve located in a recess in the wall around the shaft, said shaft and said sealing member being relatively axially movable, and means exerting axial pressure on one of'said last-named elements.

PAUL P. BAUERNSC'HMID.