US1314378A - t ls mer - Google Patents

Description

clear description. l v My invention relates to puppet valves tor` fluid pressure engines, particularly to ei;-y

raut e. mienten, or ain Your; u'. if.

VALVE. f

T' Specification of Letters Patenti Il? tjgiiiiljgaf filing, jflglt,

To' all whom muy concern. y A

Be lit known ythat l, PAUUG. Tisainn, a subject of .the German Emperor, residing `in the borough ot. Manhaittan, cit-y, county, and State 'of il ew York, have invented eer.n

tain ynew and usetul improvements iny tolylowingis a full and,

Valves, of which the haujst valves for 4internal combustion enf gines.l f

ill-.ese functions because of foreign matter indino; lodginrmt between the valve and its seat, and carbon `:fouling the outs-ide and1 edges ofl the valves.

@ne ol'ilieet of any foreign matter this inventionis to renruive forthwith yand to this end a relative movement between the valve and its lseat is provided.`

'avoid 'fouling ot the outer. the valve, Without however permittingit to become y'unduly hot, l provide a passage through the exhaust valve and circulate cooling fluid through ituwithout' reducing the ytemperature of the valve as a whole', permitting the valve head to rise to a` suiiicient heat to preventA the accumulation o carbon and keeping it at a temperature low enough tov avoid warping orl from overheating.

By way of illustration i have described' in the following specification and shown'in' the accompanying drawings, my' invention as applied `to aneihaust. lvalve oi' the puppet type in an internal' l'combustion engine. it is to be understood, however, that 'the invention. is broader than the,particular use shownl hereand is'capable of many varia# tions. i

.in the drawings; i Figure l represents in longitudinal sec tion one cylinder vof a four cycle internal combustion engine, equipped with rny'fim-l proved'exhaust valve.' t l Figl'Q isa top view ofthe same.

Fig. "-3 is a longitudinal section, 'on a larg'errscale, of the exhaust valve.

application ined april as, .1, sie. serial no. assess.

latter valvesare apt to fail in their.

surface of the valve-V stern Fig. i and o are similar 'views liaust Ya'lve lzit successively later thev cycle, and

Fig. 6 is a cross section on the of Fig. l.

7 and d show Referring more par ings, 2 represents' a cylinder, housing', i a crank, 5 necting rod of a four cycle engine'oi usual oi' the eri-- fn'iodilications.

construction; f? andS are'the'fconvcntional halt-time gears, cooperatin "uitli cani 9 on ShatiO, roll 26, push'rol 2T and rocker to produce t the. 'usual y of "exhaust valve 12,

motionv two other, but slight motions.

periods of line gft-B i tieularly 'to y tlie draw- Y its crank apisl'on and il a :foin

producedby camv l) as Awill be shown' laterq'f,

Athll is shown an automatic inlet valve the puppet type with a no seatQ The exhaust valve i2 is also 'oiy to' its seat as shown by the overhang;r at the .Valve seat l-i, being slightly elevated and narrow.' Exhaust valve i2 is held' to its seat by spring l5 anchored to a bracket 16, which also supports the pivotoi rocker y the puppet 2 type but is flat seated and' here eccentric ifi."

ein

25.. A stirrup'lQ mounted loosely upon screw head Q0 connects spring" l5 with ijalve stem 23. lilith this arrangement rotation` of 'the valve stem 23 with respect to the stirrup i9 lis permitted.tlie rotating means comprising pawl 2i with a spring 32,'a back stop S-S'and 'pivoted vat 2l; crown ratchet wheelQ'Z is rigidly secured tothe valve' stem 23. Further details otthis movement will be described later.

Valve stem is hollow, the passage j28 communicating at oneend with the space within the cylinder Q 28 with' the atmosphere. Sleeve lvalve 29 hung by curved link 30 at 3i to rocker 2o' is and through the ports' adapted to close the ports '28 during the compression, explosion and .scavenging strokes, the cam 9 being formed to produce this motion without interteringi` with the four cycle77 movement of the `exhaustjvalve 12. It Awill be seen` that on the suction stroke,`

of the piston, ports '28, .beingl open, a current of air will be drawn through the passage Q8,

Liucin'g a local drop in temperature`ir. val.'l e 12, but ports 28 are kept closed during ghe compression and explosion strokes of the engine. The passage 28 may be '26* readily cleaned by removing the screw plug 20, without taking apart the exhaust valve and associated parts.

The order vof the movements of rocker 25' are as follows: The position shown in Fig. 1

shows the beginning of the suction stroke;

, piston v5 begmning its downward travel; valves 11 and 12 are shownclosed, and ports 28 in hollow stem of exhaust valve 12 .are open, sleeve valve 29 being held high by 15 means of link 30 and rocker 25, to this end,

into the combustion chamber, thereby keeping valve 12 at such .a point of heat that v no carbon'can form on it; at thes'ame' time, by way of control cock 37 and check-valve 36, fuelfhas entered by way of igniter 34:'

with its spark plugs'35 and 35 and by means of the vacuum created by the down-going piston, turned into a gas; .A little later the automatic inlet valve 11 opens, admitting 'air to close again near the end of the stroke ofpiston 5. Next,s`leeve valve 29 is lowered, closing ports 28', because of a suitaha'ust valve 12, thereby engaging pawl 21- 1 with ratchet wheel 22, and the rocker and i140 pawl straighten out durin the approach 'ofirocker 25 to head 20, t ereby rotating exhaust valv'ef12 without however lifting it 'off' its seat 14, the position then being as shown in Fig. 4.

v*This produces a shearing action at the'v moment before lifting the valve when it is under considerable pressure, removing any foreign'matter which may have found lodgment upon either valve or Valve seat; to this 5o end, as shown in Figs. 1 -to 4 and 6, the

. valve stem 23 is located eccentric to' its sea and overhangi'ng at 13.-

' A further move ofrocker 25 opens eX- haust valve 12 fully as shown in Fig. 5, to

.again close at the end of the lscavenging stroke in usual manner ready to repeat.

lAlthough' a valve, eccentric to its seat, has

. been shown at- Fig. 6, another method can be used in which an overhanging and shearing 50 action yis shown in Fig. 7, the'valve seat 141 being oval; in this case the valve stem may be 4central to the valve seat. The' valvestem 7' could be also guided'n an eccentric bushing,

` .wliiclrcouldrbe either rotated or moved' to so that air willenter by way of ports 28v combination of a puppet valve md fro without departing from thespirit of tlns mventlon, as shown 1n Fig.- 8, 1n

whichlever 3S may be moved in any -c onvenient manner.

I claim:

1. In Van engine, a valve seat and .a puppet valve having a flat seating surface and rotatable about an' axis spaced unequally from points'around the inner edge 'of said erally across said valve seat.

'. 2. Ina'n engine, the combination of a flat 'valve seat, said puppet valve being adapted I by rotation to scrape'its contact surface latseated puppet valve, the seat constructed to pro-vide an overhang for said valve, and meansv for permitting a relative movement of the Icontacting surfaces to produce a shearing action. 3. In'an-engine, faced puppet valve, a narrow and raised seat therefor with the valve head overhangin l said seat and' means for rotating s ald va vey while on its seat.

the combination of a Hat v 4. In an engine, a puppet'valve provided with a passage, said passage ai'ording a means for equalizing fluid pressure on the two sidesof the valve to provide a local reduction in temperature in said valve to avoid overheating, and means for controlling said passage, said means being independent of the movement of the valve.

5; In an engine, the combination of a pu pet valve provided with a passage throng out its stem and head and means for affording a movement of air through said passage.

6. In an engine, the combination of a puppet valve provided with a passage through its stem and head and means for i aordlng a movement of a iuid throughv said passage, means for keeping such movement 1n one direction for the purpose described, said means being independent of the movements of the'valve.-

7. In an engine, the combination of a puppet valve provided witha passage through i its sternand means for affording a movement of fluid through such stem and means for keeping such movement in one direction for the purpose described.

8. In an internal combustion engine, the rovided with a passage'through :its stem an head to allow the movement of a fluid through said passageand a sleeve valve opening said passage during the suction stroke of said engine.

9. In mechanism of the 'character described, the combination of a puppet'valve 'having a passage through its stem and head to permit the passage of coolin fluid and I means for causlng the passage o said Huid vwhen the pressures von the two sides ofl the valve are unbalanced, said means being independent of the movement of said valve.

10. In mechanism of. the character described, the combination of a puppet valve having a channel through stem and head to' means including a sleeve valve sliding upon said valve stem and independent of said valve.

11. In mechanism of the character described, the' combination of a puppet valve having a channel to aord a passage for a uid,..and an Valnhomaitic means for keeping v the Huid passing through said channel unidirectional for the purpose described.

12, In mechanism of the character cle-- scribed, a puppet valve having a hollow extending through it, stem and head, and hav;

ing means for permiting cleaning of such hollows without removing' the valve.

PAUL Gr. TISMER.

Witnesses:

Emana Swanson, HARRY E., lmon'r.

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