US1377523A - Overhead valve - Google Patents

Description

W. H. AND P. M. PAYNE.

OVERHEAD VALVE.

APPLICATION FILED DEC. 16, 1919.

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W ILLIAM HARVEY PAYNE AND PEARSON MOORE PAYNE, OF .WASHINGTON, PENN- v SYLVANIA.

OVERHEAD VALVE.

Specification of Letters Patent.

Patented May 10, 1921.

Application filed December 16, 1919. Serial No. 345,308.

To all whom it may concern:

Be it known that we, WILLIAM H. PAYNE and PEARSON M. PAYNE, citizens of the United States, and residents of Washing- 5 ton, in the county of Washington and State of Pennsylvania, have invented certain new and useful Improvements in Overhead Valves, of which the following is a specification.

()ur present invention relates generally to overhead valves and more particularly to an arrangement of this character, having as its object the elimination of rattling and noisy contact between the valve operating parts of overhead valves.

As at present utilized in connection with many automobile motors overhead valves uniformly embody a rocker arm, one end of which engages the upper end of the spring controlled valve stem and the other end of which is engaged by the upper end of the push rod, and these partsare normally formed entirely of metal and in addition to this metal to metal contact which when in need of adjustment is sufficient in itself to produce considerable noise, it is most frequently the case that there is a slight spacing between the end of the valve stem in its uppermost position and the adjacent end of 0 the rocker arm.

It is the purpose of our invention to eliminate the usual metal to metal contact be tween the push rod and the rocker arm and provide means for holding the rocker arm in yielding engagement with the valve stem at all times.

With these objects in view, our invention consists in the arrangement to be now described with res ect to the accompanying 40 drawing, which orms a part of this specification, and in which,

Figure 1 isa side view partly broken away and in section, showing our improved overhead valve,

Fig. 2 is a horizontal section taken on line 2-2 of Fig. 1, and

Fig. 3 is an enlarged section throu h the cognecting ends of the rocker arm an push ro Referring now to these figures, the rocker arm is shown at 10, fulcrumed as usual at 11, with one tappet end 12 opposing the upper end of the valve stem 13, which latter is controlled as usual by a spring 14.

The opposite end of the rocker arm is in accordance with our present improvements provided with a vertical bore in which is seated the upper portion of a contact member 15, preferably of cylindrical form and incased in a cylindrical metal .jacket 16 which is snugly fitted into the bore of the rocker arm and extends for the full length of the cylindrical contact member in order to prevent distortion of the lower end of the latter which projects into 'a' lower counterbore of the rocker arm.

The lower end of the contact member '15, which latter may be formed of fiber or other non-metallic material adapted to this use, is

preferably concaved for engagement with a the incased contact member 15.

The contact member is preferably provided with anaxial opening 22 registering with an oiling opening 23 through the upper portion of the rocker arm so that oil may be readily supplied to the contacting surface of the contact member 15 and the convex enlargement 17 of the push rod.

The spring 20 thus operates, with bear- I ing on the upper end of the push rod 18, to maintain the tappet end 12 of the rocker arm 10 in yielding engagement with the upper end of the valve stem 13, withoutinterfering with the operation of the valve stem controlling spring 14, and thus in view of the elimination of the usual spacing between the tappet end of the rocker arm and the valve stem, and the particular non- "metallic push rod engaging surface of the rocker arm, noises are ehminated to a maximum degree and slight wear is constantly taken up or compensated for so as to render infrequent the present frequent adjustments of valves of this type.

Our invention can be applied to any of the standard overhead valves with little troubleand expense, will, with care, endure to the remarkable extent the wear and'tear of high speed action, and will as above 7 stated, eliminate the present necessity for frequent adjustments.

We claim 1. In an overhead valve, a rocker arm having a tappet at one end, and a bore vertically through its opposite end with a counterbore at its lower surface, a push rod having a central convex enlargement at its upper end, a non-metallic contact member mounted in the bore of the rocker arm and having a lower concave surface engaging the push rod enlargement, and a spring within the counterbore around a portion of said contact member, and bearing on the upper portion of the push rod around its said enlargement.

2. An overhead valve including a rocker arm, having a bore at one end, a non-metallic contact member, having a lower concave end, a metallicv sleeve in which said member is incased, and securely fitted into the counter bore of the rocker arm, a push rod having a convex enlargement at its upper end engaged by the said contact member and also having a shoulder around the said enlargement, and a spring between the rocker arm and push rod having a portion thereof surrounding a portion of the said contact member, as described.

3. An overhead valve includin arm, having a bore at one en a nonmetallic contact member, having a lower concave end, a metallic sleeve in which said member is incased, securely fitted into the said bore of the rocker arm, and a push rod having a convex enlargement at its upper end engaged by the said contact member, said rocker arm having a counterbore around the lower portion of the said cona rocker tact member and said push rod having an angularly grooved flange around its 'said convex enlargement, and a spring disposed in the counterbore around the lower end of the contact member, the lower end of which has a bearing in the grooved flange of the push rod, as and for the purpose described. WILLIAM HARVEY PAYNE.

PEARSON MOORE PAYNE.

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