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Publication numberUS2564902 A
Publication typeGrant
Publication dateAug 21, 1951
Filing dateNov 2, 1949
Priority dateNov 2, 1949
Publication numberUS 2564902 A, US 2564902A, US-A-2564902, US2564902 A, US2564902A
InventorsHouser Samuel G, Kibler Joseph F
Original AssigneeH & K Valve Silencer Company
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Tappet valve silencer
US 2564902 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

Aug. 21, 1951 s. G. HOUSER ET AL TAPPET VALVE SILENCER Filed Nov. 2, 1949' if m b INVENTOR i atenteci Aug. 21 1951 TAPPET VALVE SILENCER Samuel G. Houser and Joseph F. Kibler, Washington, D. 0., assignor to H. & K. Valve Silencer Company, a copartnership Application November 2, 1949, Serial N 0. 125,002

This invention relates to improvements in valve-operating mechanisms of internal combustion engines.

It is an object of the invention to provide a tappet arrangement for inclusion in the valveoperating mechanism of internal combustion engines, said tappet arrangement being designed to operate in substantially silent manner and being capable of easy adjustment.

A further object is to provide a tappet arrangement constituted of readily assembled, easily fabricated parts embodying standard screws, nuts, threads, and the like or parts which can be readily produced in quantity at relatively low cost.

A still further object is to provide a tappet arrangement which can easily be substituted for tappets at present in use on internal combustion engines.

Valve tappets used on internal combustion engines, especially automobile engines, are a constant source of trouble in that the clearance relations between certain of the parts must be held to close tolerances in order to produce satisfactory operation of the engine. Silent or relatively silent operation of the tappets is another factor that has received considerable attention in the prior art. Thus, valve tappets have already been proposed wherein resilient bowshaped members are interposed. between the end of the tappet per se and the endof the push rod. Relatively soft buttons, knobs or the like, e. g., made of plastic, etc., have been suggested as a means to reduce the noise of operation of the tappet, such buttons being located between the contacting surfaces of the tappet and the actuating or push rod. Among the difliculties encountered in the prior art in the design of noiseeliminating tappets may be mentioned the difficulty of efiecting adequate lubrication of the tappet mechanism and the very rapid wear to which noise eliminating inserts are subjected.

In accordance with the present invention a valve tappet is provided of which the free end that engages with the actuating rod is of substantially spherical shape and cooperates with a socket of similar shape although of more ample size in the actuating arm. The substantially spherically shaped end of the tappet is provided with an insert which is urged forward by resilient actuating means contained within the tappet per se said insert extending through the end of said tappet and acting as a shock-absorbing and noise-eliminating cushioning means. Lubrication of the resiliently urged shock-absorbing 5 Claims. (01. '12390) member is insured by coaction between the end of the tappet and the cup-shaped end of the actuating rod.

The invention will be described in conjunction With the accompanying drawing wherein:

Fig. 1 shows the improved tappet and its actuating rod in elevation, together with a portion of a valve rocker arm.

Fig. 2 is a longitudinal section of the tappet.

Fig. 3 is a longitudinal section through the top of the push rod.

Referring in detail to the drawing, the tappet per se is constituted of a steel tube I exteriorly provided with screw threads 2 along substantially all of its length. The tube l terminates at the bottom in a head constituted of a portion 3, of slightly greater external diameter than portion I, which terminates in a substantially spherically shaped bottom portion 4. Centrally and interiorly of the tube I is a bore which is threaded to receive a screw, preferably of some suitable standard thread, which bears against a coiled spring 6 disposed inside the tube I. This spring 6 bears against a piston-like member I having a head 8 and a cylindrical portion of lesser diameter extending downwardly therefrom (see Fig. 2), said head reposing against a shoulder inside the tube l serving as a limit for the downward movement of the end of the pistonlike member. The extreme end of the portion of the piston-like member that extends through the spherical termination 4 of the tube I is rounded off as shown at 9. A lock nut I0 is provided on the upper portion of the tube I and a lock nut II on the screw 5.

The tappet of the invention is preferably used in connection with a conventional rocker arm, diagrammatically indicated by l2 in Fig. 1, although the invention is not limited to this particular use or adaptation.

When used as shown in Fig. 1, the tappet of the invention is intended to cooperate with any standard or commercially available push rod. Such a rod is indicated at I3 and it carries the usual cup-shaped socket [4. In accordance with the invention, however, the end 4 of the tappet is smaller than the cup I4 thus leaving room for the accumulation of oil for lubricating the pistonlike member 1 during its operation.

The tappet device of the invention is easily attached to the rocker arm I2 as by removing the nut l0, screwing the threaded tube I into the rocker arm I2 and locking the tube in desired position with th locknut ID. The piston-like member I is inserted into the tube l, the spring 6 3 placed so as to act against the head 8 of the member l and the screw 5 then inserted so as to compress the spring 6 to the desired extent. The screw 5 can be locked in position by the locknut I. By adjusting both the tube and the screw, the operative conditions may be varied until the optimum result is obtained. The tappet device win then retain its operating position.

. The tappet device is made of parts of standard size, capable of being worked on automatic screw machines and ordinary Standard nuts I0 and ii may be used, thus still further lowering the cost of manufacture. The device can be easily and quickly dismantled, cleaned, repaired, and reassembled.

What is claimed is: v I

1. A tappet for internal combustion engines, comprising a cylindrical tappet head having a substantially spherical tappet face for cooperation with a spherical cup-like end of a push rod, means for adjustably connecting the tappet to an actuator, a bore extending coaxiall through said tappet head, a piston-like member extending through said bore and beyond the outside of said spherical face, centrally thereof, a spring within said bore, adapted to urge said piston-like member forwardly out of the bore, means projecting from the other end of the tappet for adjusting said spring whereby to regulate the recoil thrust exerted by said piston-like member on said spring and means for locking said spring-adjusting means in locked position after connection is made to the actuator. d

2. A tappet system for internal combustion engines, comprising in combination with a cylindrical tappet head having a, substantially spherical tappet face at one end thereof for cooperation with a spherical cup-like end of a push-rod, wherein said face is of smaller spherical size than the inside spherical shape of said cup-like end, whereby to permit lubricant to collect between non-contacting portions of said tappet face and said cup-like end, a bore extending through 'said head coaxially, a piston-like member extendinng through said bore and beyond the outside of said. spherical tappet face centrally thereof, a spring within said bore adapted to urge said piston-like member forwardly out of the bore, means extending from the other end of the tappet for adjusting said spring whereby to regulate the recoil thrust exerted by said piston-like member on said spring and means for locking said spring-adjusting means in locked position.

3. A tappet for internal combustion engines, comprising a cylindrical tappet having a substantiall spherically shaped tappet face at one end thereof for cooperation with a spherical cup-like end of a push rod, a bore extending coaxially through said tappet, a pistonlike member extending through said bore and beyond the outside of said spherical face, centrally thereof, said piston-like member terminating exteriorly in a rounded surface, a spring within said bore, adapted to urge said piston-like member forward, means at the other end of the tapp t for adjusting said spring whereby to regulate the recoil thrust exerted by said piston-like member on said spring and means for locking said springadjusting means in locked position.

4. A tappet for internal combustion engines, having a substantially spherical tappet face for cooperation with a spherical cup-like end of a push rod, means for adjustably connecting the tappet to an actuator, a, bore extending coaxially through said tappet, a piston-like member extending through said bore and beyond the outside of saidspherical face, centrally thereof, a spring within said here, adapted to urge said piston-like member forwardly out of the bore, means at the other end of the tappet for adjusting said spring whereby to regulate the recoil thrust exerted by said piston-like member on said spring and means for locking said spring-adjusting means in locked position after connection is made to the actuator.

5. A tappet for internal combustion engines having a substantially spherical tappet face at one end thereof for cooperation with a spherical cup-like end of a push-rod, wherein said face is of smaller spherical size than the inside spherical shape of said cup-like end, whereby to permit lubricant to collect between non-contacting portions of said tappet face and said cup-lik end, a bore extending through said tappet coaxially, a piston-like member extending through said bore and beyond the outside of said spherical tappet face centrally thereof, a spring within said bore adapted to urge said piston-like member forwardly out of the bore, means at the other end of the tappet for adjusting saidspring whereby to regulate the recoil thrustexerted by said piston-like member on said spring and means for locking said spring-adjusting means in locked position. d

SAMUEL G. HOUSER. JOSEPH F. KTBLER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number l lanie Date 1,172,362 Jackson Feb.-22, 1916 1,318,609 Senkpiel Oct. 14, 1919 1,525,583 Koehler Feb. 10, 1925 1,729,468 Abbott Sept. 24, 1929 1,865,998 Abbott July 5, 1932 1,866,293 Chandler July 5, 1932 2,042,884 Facchini June 2, 1936 2,075,811 Kaufmann Apr. 6, 1937

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1172362 *May 31, 1907Feb 22, 1916Lucian C JacksonGas-engine.
US1318609 *Mar 5, 1919Oct 14, 1919 Valve-tappet
US1525583 *Aug 22, 1921Feb 10, 1925Rudolph KoehlerSilencing and cushioning device for valve-actuating levers
US1729468 *Jun 21, 1923Sep 24, 1929 Valve-tappet construction
US1865998 *Oct 23, 1929Jul 5, 1932Abbott Jr Adrian OValve operating assembly
US1866293 *Feb 3, 1928Jul 5, 1932Chandler Henry TValve follower
US2042884 *Jan 31, 1936Jun 2, 1936Ralph Facchini RigoTappet
US2075811 *Feb 15, 1934Apr 6, 1937Kaufmann Harry AValve
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2646780 *Jun 15, 1950Jul 28, 1953Edmund A KwiecinskiValve tappet adjusting screw
US2720874 *Aug 12, 1952Oct 18, 1955Brooks Eugene SValve screw
US2923282 *Jul 30, 1958Feb 2, 1960White Colen LEngine valve tappet
US2927566 *May 29, 1957Mar 8, 1960Moye Benjamin HPush rod for internal combustion engine
US2983991 *Feb 23, 1956May 16, 1961Chrysler CorpValve tappet and method of making
US3024775 *Apr 29, 1960Mar 13, 1962Clemens WuestValve tappet
US3880128 *May 2, 1973Apr 29, 1975Ford Motor CoValve actuation mechanism including valve lash adjustment means
US4539952 *Nov 15, 1984Sep 10, 1985Toyota Jidosha Kabushiki KaishaSupporting mechanism for a valve system of an internal-combustion engine
Classifications
U.S. Classification123/90.47, 123/90.61, 123/90.45
International ClassificationF01L1/14, F01L1/16
Cooperative ClassificationF01L1/16
European ClassificationF01L1/16