US1406986A

US1406986A - Rotary valve for internal-combustion engines

Info

Publication number: US1406986A
Application number: US283193A
Authority: US
Inventors: Keller Jeremiah
Original assignee: JOSEPH E ROSENFELD
Current assignee: JOSEPH E ROSENFELD
Priority date: 1919-03-17
Filing date: 1919-03-17
Publication date: 1922-02-21
Anticipated expiration: 1939-02-21

Description

J. KELLER.

ROTARY VALVE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED MAR. 17, 1919.

1,406,9 6, L Patented Feb. 21, 1922.

2 SHEETS-SHEET 1.

Z0 L i6 J. KELLER.

ROTARY VALVE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION man MAR. 17, 1919. I 1 406 986. v Patented Feb.-2l,- 1922.

, 2 SHEETS-SHEET 2.

mun H ii ziililllill E ?,\\\\\\V1|||||-|l| a citizen of'the United States residing at Chicago, county of Cook, and 1 very large seating force.

UNITED STATES PATENT OFFICE.

JEREMIAH KELLER, O1 CHICAGO, ILLINOIS, ASSIGNOR TO JOSEPH E. ROSENI'ELD,

OMAHA, NEBRASKA.

- ROTARY VALVE FOR INTERNAL-COMBUSTION ENGINES.

To all whom it may concern:

.Be it known that I, JEREMIAH KELLER,

state of linois, have invented certain new and useful Improvements in Rotary Valvesfor Internal-Combustion Engines, of which the following is a specification.

The present 'nvention has to do with improvements in rotary valves for internal .combustion engines and has particular ref erence to improvements in poppet valves embodying the rotary'feature. These poppet valves are normally seated under spring pressure and they are opened by lifting them against such spring pressure. The peripheral portion of the valve is generally beveled to seat evenly against a beveled seat. Owing to wear in the operation of the valve, and also owing to the high temperatures at which it operates, it is found desirable to cause the valve to rotate duringthe successive operations. N

' Owing to the high speed at which these valves operate, it is necessary to provide a very positive form of rotating mechanism and one which will operate positively at high speed. One of the objects of this invention is to provide a rotating devicewhich will conform very successfully to'this requirement.

The springs which are used for reseating the valve are generally very stiff and exert a Consequently, it is desirable to so construct the rotating mechanism that the friction or resistance generated by the spring will not interfere with the rotation of the valve itself. Therefore, another object of the invention is to so construct the valve and rotating mechanism that the force of the spring will not be transmitted through the rotating devices, but will be taken care ofindependently thereof.

Another object is to provide a mechanism of this type which shall be simple and easily constructed from a comparatively small number of parts and at low cost.

Other objects and uses of the invention will appear from a detailed description of having applied thereto a valve and rotating Specification of Letters Patent. Patented Feb. 21, 1922. Application flled March 17, 1919. Serial No. 283,193.

. position.

Fig. 3. shows a bottom. end view of the rotatlng mechanism.

Fig. 4;, shows a longitudinal sectionthrough the valve and rotating mechanism on considerably enlarged scale as compared to the previous figures.

Fig. 5 shows an enlarged cross section through the spring-cup.

Fig. 6 shows a bottom view corresponding to Fig. 5.

Fig. 7 shows a side view of the plug which closes the lower end of the spring-cup.

Fig. 8 is a view similar to Fig. 7, but is taken at right angles thereto.

Fig. 9 is a section taken on line 9-9 of Fig. 4 looking in the direction of the arrows.

Fig. 10 is a section taken on the line 10-10 of Fig. l'looking in the direction of the arrows. 4

Fig. 11 is a section taken on the line -11 11 of Fig. 4 looking in the direction of the arrows; and, h

Fig. 12 is a side view of one of the clutch elements.

For purposes of convenience in illustration and for a better understanding of the invention, 1 have shown the valve as being applied to an engine 13 having a gas passage 14 and another gas passage 15 between which the flow of gas is to be controlled. The valve itself is designated by the numeral 16. It is formed or fastened to the upper end of the stem 17 which stem extends down through and finds a reciprocating bearing in a neck portion 18.

Ordinarily the reciprocation of the valve is secured by a finger or a cam pressing upwards against the lower end of the stem. Inthe present case I have provided means whereby the stem will be periodically rotated during its movement. I will now describe the same in detail.

The bearing-sleeve 18 is shown as projecting downwardly in a continuation 19 so as togive additional bearing and support to the valve-stem. A collar 20 surrounds the extension 19 and has a flange 21 which seats against the partition wall 22 of the engine. This collar has a downwardly extending sleeve 23,.the detailed construction of which is well shown in Figs. 1' and 2. It is provided with a pair of op sitely located

slots

24 and 25, only the sot 24 appearing in Figs. 1 and 2. Another sleeve 26 surrounds the lower portions of the stem 17 being spaced from said stem a sufiiclent distance so that

itsarms

27 and 28 may work within the

slots

24 and 25. Only the arm 27 appears in Figsll and 2.- k

The

arms

27 and 28 are in reality formed by a pair of slots cut in the sleeve 26, which slots are complementary to the slots 24 and.

25. All of the slots are cut at anan le with respect to the axial direction of t e device, so that while moving the two

sleeves

23 and 26 with respect to each other, they will be caused'to rotate through a desired angle. It is desired to provide means for communicating this rotation'to stem 17 in such a way and in such manner as to insure the proper rotation of the valve. T

e lower end of the sleeve 26 carries a flange 29 which works within a clutch-cup 30. Said clutch-cup is provided with a downwardly depending collar 31 which is secured to the lower end of the stem 17 by.

' 29 of the sleeve 26 in counter clockwise direction, as shown in Fig. 10, the balls or rollers will rock and cause the clutch-cup 30 to also rotate, which rotation will be communicated to the valve stem.

In order to insure a proper seating of the rollers during the periodical operation of the device at high speed, I have shown the springs 36 which press against the rollers and tend to force them into locking enagement between the parts at all times. 3 spring washer '37 serves to retain the rollers 35 and springs 36 in position within the friction cup.

The main spring 38 tends to force the valve stem down for the purpose of seating the valve. Ordinarily, this spring communicates its force directly to the valve stemor to some element directly connected therewith. In the present case I have provided .a spring-cup 39 comprising a flanged portion 40' and a collar 41, which spring cup surrounds or covers over the friction clutch. This cup is provided with an upstanding flange 42 around which is seated a washer 43 against which the lower end of the main s ring 38 finds a bearing. By reason of t e configuratlon of the spring-cup 39, a

t e spring 43 into which may be entered the forks of a valve lifting tool in order to remove the spring pressure from the valve when desired. a

The upper end of the spring presses directly against the flange 21, or against a washer 45 seated thereagainst.

A cap 46, the detailed construction of which is shown in Figs. 7 and 8,'serves to close the lower end of the spring-cu This cap is generally circular in form an has an upstanding central lug 47 which seats into the lower end of the spring-cup. This lug is provided with a mutilated bevel comprising the

beveled portions

48 and 49, each occupying practically 90 of circumference, in combination with a pair of mutilated or straight sections 50 and 51, each of which also occuies approximately 90. of circumference.

formed, as shown in Fig. 5, that the cap may be set into it, after which the cap may be he lower portion of the spring-cup is so rotated a quarter of a turn to completely a will be readily understood from an examination of Fig. 4.

During the lifting operation the lifting force is communicated directly to the lower face of the cap 46. From there it is transmitted to the valve stem 17 through the medium of the spring washer 52, and is independentlytransmitted to the main spring 38 by way of the spring-cup and washer 43.

It is thus observed that at no time does the force necessary to compress the main spring have to be transmitted either to or through the valve stem, so that the-friction created by the main spring itself does nothave to be overcome in order to rotate the valve stem.

In the ordinary operation of this device,

upon lifting the spring-cup the same will be held against rotation by. the friction of the -main spring, the upper -end of .said sprlng being in contact with a stationary I part-45. The friction created by the washer 52 between the clutch-cup 30 and the cap 46 'will be sufiicient to retain the valve-stem sponding to the

slots

24 and 25, which forward rotation will be communicated to the clutch-cup 30, through the medium of the rollers 35. The rotation of the clutch-cup will, of course, be transmitted to the valve stem. which will thus be rotated'through the desired angle on the down-stroke.

By the use of a. construction in which the rotation of the valve takes down-stroke as distinguished rom rotation on the \lP-StlOkO, it is possible to have the valve in rotation at the instant it comes into contact with the seat, so that more or less of a grinding action is secured. The results in a-more perfect seating at each operation and also serves to keep the valve and seat always in perfect condition. In fact the action is such as to polish the valve and seat, and maintain them in such condition. This action is enhanced by the further fact that the arrangement permits the valve to over-ride in its rotary motion, continuing its rotation beyond the time when the rotating tendency of the clutch has ceased. The use of a friction clutch in turn assists this over-riding tendency since it is possible for the valve to continue its motion much easier with this type of. drive combination with a valve having a down-- the lower end of the valve stem independ-- 'ent-ly, substantially as described.

than is the vcase when using a ratchet or other similar device.

While I have herein shown and described only a sin le embodiment of the features of my invention, still I wish it understood that I do not limit myself to said embodiment except as I may do so in the claims.

I claim:

1. In a device of the class described, the

wardly depending stem and a stationary member through which said stem operates, of a pair of cooperating sleeves surrounding the stem and having complementary engaging angular projections whereby relative longitudinal movement between said sleeves results in their relative angular movement, one of said sleeves being in engagement with a stationary part, a clutch flange on the lower end of the other sleeve, said clutch flange having a plurality of cam slots, a clutch-cup surrounding said flange, a connection between said cup and the lower end of the valve stem, clutch rollers between the clutclrcup and the clutch flange, springs normally pressing said rollers into locking engagement between the parts, a spring-cup surrounding the clutch-cup and freely movable with respect thereto, a cap closing the lower end of the spring-cup, a spring washer between the clutch-cu and said cap, and a main spring surrounding the parts and 00- cupying a position between the spring-cup and a stationary part, whereby lifting pressure applied to the cap is transmitted through the spring-cup directly to the main spring, and also is transmitted directly to clutch-cu lace on the 2. In a device of the class described, the combination with a valve having a stem working within a stationary part, of a secured to the lower end of the stem, a c utch-flange in said cup having a plurality of cam notches in its periphery, clutch rollers in said notches, sprin normally forcing said rollers into locking engagement between the parts, means for periodically rocking the clutch-flange back and forth for the purpose of intermittently rotating the clutch-cup, a spring-cup surrounding the clutch-cup and independent thereof, a cap-closing the lower end of the spring-cup and a main spring surrounding the stem and located between the spring-cup and the stationary (part whereby pressure lifting forces exerte on th. cap are transmitted directly to the main spring through the spring-cup and whereby said lifting forces are also transmitted directly and independently to the lower end of the valve stem, substantially as described.

3. In a device of the class described, the

combination with a poppet valve and a stationary part wherein the same operates, said poppet valve having a valve stem, of a friction clutch interposed between said-valve stem and another part against which said friction clutch may react, means for intermittently operating said friction-clutch for the purpose of intermittently rotating the valve stem, a spring-cup surrounding the friction clutch, a cap closing said spring-cup and a main spring interposed between the spring-cup and the stationary part, whereby lifting forces on the cap are transmitted directly to the main spring through the spring-cup and are independently transmitted to the valve stem, substantially as described.

4. In a device of the class described, the combination with a poppet valve and a stationary part wherein the same operates, said poppet valve having a valve stem, of a friction clutch comprislng a clutch flange and a clutch-cup, clutch rollers between the clutch flange and cup, a connection between the clutch-cup and valve stem, a pair of sleeves slidably and rotatably mounted with respect "to each other and surrounding the valve stem, complementary cam surfaces on said sleeves for producing a relative rotation between the sleeves when they are moved relatively in an axial direction, a spring-cup surrounding the friction clutch, a closure therefor and a main spring between the spring-cup and the stationary part whereby lifting forces applied to said closure are transmitted directly to said main spring and independently to the valve stem, substantially as described.