US1695586A - Valve mechanism - Google Patents

Description

Dec. 18, 192 8 F. A. HALLECK VALVE MECHANISM Filed Feb. 9. 1924 Patented Dec. 18, 1928 ,UNITED STATES PATENTIOFFiCE.

FRANKA, HALLEoK, OE-MICHIGAN crrY, innmzna, assronon TO SULLIVAN ivmonmr ERY COMPANY, A CORPORATION or MASSACHUSETTS-I VALVE -MEGHANISM'.

Application filerl February 9, 1924. Serial No. 691,622,

In the accompanying drawings 1* have shown for purposes of illustration-one form l which my In these drawings, H Fig; 1 is a side elevation of a compressor cylinder partly broken away to show the location of the valve mechanism.

i Fig. 2 is an enlarged transverse section of the valve mechanism. i

I have shown my improved type of valve mechanism for'purposes of illustration as l controlling how. of fluid to and from a cylinder 1 having a reciprocable piston 2 therein,

the valve mechanism,hereinafter described, herein forming one ofa" plurality of such mech anisms disposed radially about'each end 7 of the cylinder. The, valve mechanism proper comprises aninlet valve mechanism 3 and an exhaust valve mechanism i4,each of which includesa valve ofthe annular flat type, which may be either rigid or resllient asv desired, together with a valveseat incur-1 her and guard. These mechanisms are herein coaxially disposed upon a: common bolt 5 nisms relative to each other and also with respect to the cylinder.

T heeXhau-st valve mechanism comprises ac'entral seat or hubfportlon 6 and usual ex tion as by a plurality of coaxial transversely flexed or curved springs 9 having the1r cen-- tral portioncut away as at 10andguided the'portionfi, and reacting against a suitable plate or guard 11 andtheir ends bent up along aline' as shown at 12 the ends of the inner Springengaging the valve Send the ends of the outer springoverlyingsaid ends.

The springsare formed from resilient' fiat sheet metal and bentv so "asfto have a single continuous major curvel spring of this" J nature isyadaptedfwhen tended. to' be flatinvention may assuine in practice.

V V mering'. I which isadapted to hold the valve mecha-fi mating surfaces allowing the same to be nested together so that the efifect oi the two springs together lncreases the force-tending to seat the valve ascompared with a single springof thedesired' thickness, but does not increase it to the extent that a single spring would if 'made'in one solid piece and equal to the thickness otthe two'springs together.; A

further advantage gained by this double spring is that during rapid action of" the valve there will always be a film of air dis posed between adgacentsurfaces of the two? springs and hence a cushioning effectlfbetween the two-springs when the valve is seated, tending to ellminate hammering.

The inlet valve mechanism is shown as also 1 comprising a central seat oi' hub portion 15 i'also-mounted upon the bolt 5 and having usual inlet ports 16. Theseportsare cove-red by a usual valve 17, similar to the valve 8, but it is'to be noteclth'at I use only one spring18, similar tothe' springs 9 ,-for hold 'ing the same in position. This arises'from.

the fact that duringoperation the inlet valve would of course not. be-subjected to sudden opening and closing-for the air drawn in will: i

beat-only atmospheric pressure and hence the valve must closeonly against a pressure wl'ii'ch is not great enough to produce ham- Theexhaust valve, however, is

opened under pressure slightly greate-r thanfl .the receiver pressure which is considerably greater than the atmospheric pressure and which. tends to close the vvalvequickly, thus *ahli" producing hammering action.

[It will thus be seen thatmy construction...

- 'has' certain inherent advantages due-to the f-usepf twof separate springs for seating the 1 valve which a, singlespring of the same resil- 'ienoy would not have. Tlhe improved result that I obtain by this construction is that I" can seat a highys ieed reciprocating or movable valvef'with practically no hammering action. Thlsis apparentlyaccompllsheddue to thefactthat a film of air is disposed between the adjacent: surfaces otfthe two sepa- Y rate "springs and "thus during seating action the valve tends to move so.- quickly -that. the

lower spring will of 'cour'se' firs t have Ito eliminate the airbetw'eenf the adjacent sur-r larged irregularities on the surfaces of these two springs will cause the same to be sepa rated which Will supply the necessary space within which the film of air can pass. It is also possible for this film of air to be mate rial'ly increased and thus the cushioning action made more effective by certain structural features in the valve springs. For instance, the bent up ends will, upon flexing of the springs, tend to slide relative to each other and accordingly the bent ends of the top spring will tend to ride up on the bent end of the lower spring to thereby cause a separation of the springs and increase the air space therebetween which effects a cush- 1 ioning action during closing of the valve.

It will thus be obvious that the cushioning efl'ect cannot be obtained with a single spring even though it does have the same amount of resiliency as the double spring. Further, it will be seen that I have accomplished such a result by an extremely inexpensive means, namely, due to the fact that I use identical yieldable means thus requiring only one style of spring to be carried in stock and from which any two springs may be picked out at random and so assembled as to perform their intended functions.

.NVhile I have in this application specifically described one form which my invention may assume in practice, it will be understood that this form of the same is shown for purposes of illustration and that theinvention may be modified and embodied in various other forms without departing from its spirit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

1. A valve mechanism comprisinga member forming a ported Valve seat, valve means on said seat, a stop member, and seating meansfor said valve means interposedbetween the latter and said stopmeniber comprising a plurality, of identical yieldable means having surfaces contacting with each other substantially over their entire areas when said valve means is seated. V

2. A valve mechanism comprising a mem berforming a portedvalve seat, valve means on said seat, a stop member, and means for seating said valve means loosely interposed between the latter and said stop member. comprising a-plurality of substantially identical superimposed yieldable means, aving surfacescontacting with each other an stantially over their entire areas when said valve means is seated.

3. A valve mechanism comprising a member forming a ported valve seat, valve means disposed on said seat, a stop member, and means for seating said Valve means interposed between the latter and said step member comprising a plurality of substantially identical superimposed nested spring members having a permanent flexure and having mating surfaces contacting with each other substantially over their entire areas when said valve means is seated.

L. A valve mechanism comprising a member forming a ported valve seat, valve means on said seat, a stop member, and seating means for said valve means interposed between the latter and said stop member comprising a plurality of suhstantiallyidentical yieldable means having surfaces contacting with each other substantially over their entire areas when said valve means is seated, said plurality of seating means having means whereby the same are mechanically separated during opening movement of said valve means.

A valve mechanism comprising a member forming a ported valve seat,,a valve disposed on said seat, a stop member, and means.

for seating said valve interposed between the latter and said stop'member comprising a plurality of substantially identical superimposed transversely flexed nested yieldable members having mating surfaces contacting with each other substantially over their entire areas when said valve is seated.

6. A valve mechanism comprising a member forming a ported valve seat, a reciprocable valve disposed on said seat, a stop mem her, and means for seating said valve interposed between the latter and said step mem ber comprising a plurality of coaxially disposed nested springs having mating surfaces contacting with each other substantially over their entire areas when said valve is seated, said springs having means for mechanically separatingthe same during opening movement of the valve.

7. A valve mechanism comprising a member forming a ported valve seat, a flat annular valve disposed on said seat, a stop memher, and means for seating said valve interposed between the latter and said step member comprising a plurality of annular flexed superimposed nested springs having mating surfaces contacting with each other substantially over their entire areas when said valve isseated, said springs having means for mechanically separating the same during openin movement of the valve whereby an air ens ioning effect is obtained during seating of said valve. l

8. A valve mechanism comprising inlet valve structurefland exhaust valve structure eacl of which includes a ported valve seat,

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Mam-Q.

, and a reciprocable' valve disposed thereon,-

stop members for each of said valves, and

means for seating said. valves interposed between the latter and said stop members, the

means for seating the exhaust valve comprising a plurallty of separate yieldable seatlng members having mating surfaces contacting with each other over substantially their entire areas when the exhaust valve is-seated, while the means forseating the inlet valve comprises alesser number of .said yieldable seating members. J a k 9. A valve mechanismcomprising a ported seating member, a valve disposed on said seat, a stop member,andgmeans for seating said valve interposed between the latter and said stop member-comprising a plurality of substantially identical transversely xflexed springsf having mating surfaces contacting with each other substantially over their entacting with each other substantially-over their entire areas when said flvalve is seated, said plurality ofsprings-having means whereby the same are mechanically separated'during a movement of said valve;

11. A valve -meChan-ism comprising a ported member having a valve for controlling said ports, and means for yieldably holding said valve seatedcomprising a plurality of substantially identical ring-like transverselyfiexed nested springs, certain diametrically opposite parts of'said springs having bent up portions which are adapted to cause separationof said springs upon movement thereof. N a r r 12. A valve mechanism comprising a. mem

ber forming a ported valveseat, a valve disposed on said seat, a stop member-,and means for seating said valve interposed between the i latter and said stop member comprising a plurality of substantially identical ring-like transversely flexed nested springs having mating surfaces contacting with eachother substantially over their entire areas [when the valve is seated, certain diametrically opposite parts of said springs having bent up por-' tions which are adapted to cause a separation of said springs during opening movement of said valve.

13; A valve mechanism comprising a member formin a orted valve seat a valve dis-' 1:; 7 v posed on saidseat, a stop member, and means for seating said valve'interposed between the "latter and said stopmember comprising a plurality of nestedsprings having mating surfaces contacting with each other substantially over their entire areas when the valve isseated and adapted upon opening move ment of the valve to haverelative sliding movement. therebetween. Y V

14. Avalve mechanism comprising a member forming" a ported valve seat, a stop member, a valve disposed on said seat; and yield able means for seating said valve interposed betweenthe latter and saidstop member comprising a plurality ofring shaped transverse ly flexed plate springs having thering-portions thereof in alinement with each other, i

the adjacent surfaces of sai'd'springs contacting Witheach other"substantially over their entire areaswhen the valve is seated.

15. Avalve mechanism comprising a member'forming a ported valve seat, a stop member, a valve disposed onfsai'd seat, and yieldable means for; seating saidfvalve disposed between the latterand'said stop member comprising a plurality of substantially. identical" ring-shaped nested springs adaptedto have the ring portionsbthereo'f in -alinement with.

each other, saidspringshaving mating surfaces contacting with each other substantial.-

ly over their entire areas when the fvalve is seated,and means wher by said valve is locations when said valve isseate'd! 7 16. A valve mechanismcomprising amein-f ber forming 'aported valveseat, aeguard', a

valve disposed on said seat, andyieldable means for seating said valve. interposed between the latter. and said guard comprising a plurality of substantially identical sprin'g members formed of plates having mating surfaces contacting with'each other over sub adapted to have spring contact at'only two Ion stantially their entire areas when said valve."

is seated, said plates being permanently flexed to provide diametrically disposed con- 7 tacts with said valve. l

.17. A valve mechanismcomprising a ported, seat, a guard, a valve disposed on said seal,

and means for seating said valve interposed between the latter and said guard compris r10 7 ing a plurality of substantially identical springmembers having na'ting surfaces con tacting w th each other over. substantially f their entire areas when said valve is seated, ,sa1d spring members being transversely bowed and engaging sald-valve only at d1a- I I metrically opposite locations.

18. Avalve mechanism comprisingamem Z'ber having aported valve seat, a valve'.dis- 1 I posed on said seat for controlling the ports therein, a guard member, and means for seating said valve loosely interposed between the latter and said guard member comprising a' 1 plurality of separate identical plate springs disp'osedcoaxially with said valve andJhav-- ing surfaces contacting with each'other subvalve is -s'eated. V

stantially'over their entireareas when said V 19. valve mechanism Q mprising a port- I ed, seat member, a valv'e dlsposed on said seat member tor controlling the ports therein, a guard member, and yieldable meansfor seat ing said valve inter osed between the latter and said guard mem b ity of separate-plate springs having mating surfaces contacting with each otherover substantially their entire areas when said valve is seated, said springs being transversely bowed and having the bent portion, of the springs away from the valve, the valve making contact with the adjacent spring only at the two portions of the latter most removed from the bent portion.

20. A valve mechanism comprising a ported seat member, a valve disposed on saidseat member for controlling the ports therein, a guard member, and yieidable means for seating said valve interposed between the latter and said guard member comprising a plurality of ideaticad separate nested springs each 05E substantially circular outline. and having av substantially circular opening in the center thereogt and bowed to present contacting portions in two parallel, planes disposed at right anglesto the axis of the spring, certain of said portions engaging said guard member.

21 A valve mechanism comprising a ported valve seat member, a valve disposed on said seat member for controlling the ports therein, and means m'yi eldably holding said valve to its seat comprising a plurality of substantially identical transversely flexed mutually contacting springs having means whereby during opening movement of said valve said springs are mechanically separated.

er comprising a plural with a central opening and having mating surfaces contacting with each other'over substantially their entire areas when said valve is seated, said springs. being transversely bowed and having the bent portion of the springs away from the valve, the valvemaking contact with the adjacent spring only at the two portions of the latter most removed from the bent portion. b

"25. A valve mechanism comprising a port ed seat member, a valve disposed on said seat member for controlling; the ports therein, a guard member, and yieldable means for seating said valve interposed between the latter and said guard member comprising a plurality of separate platesprings of substantially circular outline, provided; with, a central opening and havingmating surfaces contacting with each other oversubstantiallv their entire areas when said valve is seated,

said springs being transversely bowed and having the bent portion of the springs away from the valve, the valve making contact with the adjacent spring only at the two portions of the latter most removed from the bent portion. a V r In testimony whereoi aifix my signature.

FRANK A. HALLECK'.

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