US2625919A - Valve silencer and shock resistor unit - Google Patents

Description

Jan. 20, 1953 A, sc 2,625,919

VALVE SILENCER AND SHOCK RESISTOR UNIT Filed June 13, 1949 Fig.

/4 I7 II 5 I n ventor August M. Schmidt Patented Jan. 20, 1.953

UNITED STATES PATENT OFFICE VALVE SILENCER AND SHOCK RESISTOR UNIT August M. Schmidt, Gary, Ind. Application June 13, 1949, Serial No. 98,781

1 Claim.

The present invention relates to new and useful improvements in valves for internal combustion engines and more particularly to a valve silencer and shock-resisting valve tappet for the valve stem.

An important object of the invention is to provide a valve silencer and shock resister for the valve stem carried by the valve tappet and including the provision of a plurality of superposed thin metallic washers between which a film of oil works during the operation of the valve and which is compressed by the valve stem durin the closing action of the valve to resist the shock and reduce the usual noise of the valve action.

A further object of the invention i to provide a valve silencer for valve tappets wherein the number of superposed silencing and shock resisting washers may be readily increased or decreased in accordance with variations in the tension of the valve spring.

A still further object is to provide a device of this character of simple and practical construction, which is eflicient and reliable in operation, relatively inexpensive to manufacture and otherwise well adapted for the purposes for which the same is intended.

Other objects and advantages reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure 1 is a side elevational view showing the valve silencer in assembled relation with respect to a valve;

Figure 2 is an enlarged vertical sectional view of the valve silencing and shock resisting unit secured to a valve tappet; and

Figure 3 is a group perspective view of the valve silencing and shock resisting unit.

Referring now to the drawing in detail wherein, for the purpose of illustration, I have disclosed a preferred embodiment of the invention, the numeral 5 designates generally the valve silencing and shock resisting unit and which comprises an adjusting screw 6 having a hexagonal wrench-engaging fiat top head I and provided with a central bore 8 extending upwardly through the head.

The under side of head 'I is formed with an annular oil groove or channel 9 from which a pair of passages it! lead upwardly through the head and at diametrically opposite sides thereof.

A plurality of relatively thin metal washers l I, preferably constructed of brass, are positioned on top of head I and are formed with openings l2 aligned with passages It. A substantially mushroom-shaped bevel edge cap 13 has its head portion It positioned on top of the group of washers II and its stem portion 15 slidably positioned in bore 8 of screw 6. The head portion M of the cap [3 is also formed with opening [6 aligned with the openings of the washers H and head 1 and cotter pins or the like l1, smaller than the passages l0 and openings 12 and I6 are inserted upwardly through the aligned openings to secure head I, washers H and head M in assembled relation, as shown in Figure 2 of the drawings, said pins being bent outwardly and downwardly over the beveled edge of the cap l3 to secure the pins in place.

The top of head M of cap I3 is flat, as shown at [8, for contact with the lower end of a valve stem IQ of an internal combustion engine.

In the operation of the device, the screw 6 is threaded into the upper end of a valve tappet 20 of conventional construction and with the washers II and cap l3 secured in assembled relation on the head I of the adjusting screw and the screw 6 secured in adjusted position on the tappet and locked by the usual lock nut 2 I During action of the valve and tappet, oil works into groove 9 and upwardly through passage IS between the washers II to provide a film of oil between the washers and as the valve stem I9 strikes cap I3, the oil is compressed between the washers to take up the shock of the valve stem and to reduce the noise of the valve action.

Any desired number of washers l i may be easily and quickly placed in position on the silencing and shock resisting unit 5 in accordance with variation in the tension of the valve spring 22.

In view of the foregoing description taken in conjunction with the accompanying drawings, it is believed that a clear understanding of the device will be quite apparent to those skilled in this art. A more detailed description is accordingly deemed unnecessary.

It is to be understood, however, that even though there is herein shown and described a preferred embodiment of the invention, the same is susceptible to certain changes fully comprehended by the spirit of the invention as herein described and within the scope of the appended claim.

Having described the invention, what is claimed a new is:

A valve silencer comprising a valve tappet, screw having a fiat top with vertical oil passages in said top and an axial through oil passing bore therein, a stack of disks on said head in flat engagement with the lower disk flatly engaging said top, said disks having vertically aligned oil passing openings therein registering with the oil passages in said head, a bevel edge mushroom type member seated flat on the to disk of the stack with vertical oil passing openings therein registering with said openings in the disks, and pins extending through said passages and openings and securing said head, disks and member together, said pins being smaller than said passages and openings to permit oil to pass through said passages and openings.

AUGUST M. SCHMIDT.

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

UNITED STATES PATENTS Number Name Date 1,673,478 Addyman et a1. June 12, 1928 1,784,125 Wilson et al. Dec. 9, 1930 1,913,241 Kuse June '6, 1933 2,044,598 Wallace June 16, 1936 2,206,869 Banker July 9, 1940 2,240,299 Holmes et a1. Apr. 29, 1941 FOREIGN PATENTS 'Number Country Date 345,262 Great Britain Mar. 16, 1951

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