US1142177A - Piston. - Google Patents

Description

F. D. KENNEDY.

PISTON.

APPLICATION F|LEDJUNE30,1914.

1,142,177. PatentedJune 8,1915.

"F1-5. I. i s.. E.

UNITE Pill @FFIQEQ FRANK D. KENNEDY, OF GALESBURG, ILLINOIS.

PISTON.

Specification of Letters Patent.

Application led June 30, 1914. Serial No. 848,298.

To all whom it may concern Be it known that I, FRANK D. KENNEDY, a citizen of the United States, residing at Galesburg, in the county of Knox, State of Illinois, have invented certain new and useful Improvements in Pistons; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and vuse the same. This invention relates to pistons and particularly to that type provided with a transverse bore in which is disposed a wrist pin and to which latter a connecting rod is secured. .f

The object of the inventio'n resides in the provision of an improved adjustable bushing located 'within the transverse bore of the pistonand surrounding the wrist pin, the adjustment of said bushing serving to take up wear and thereby prevent lost motion. and when the piston is associated with an internal combustion engine the adjustment of the bushing referred to serves to prevent knocking in addition to obviating lost motion.

With the above and other objects in view the invention consists in the details of construction and in the arrangement and combination of parts to be hereinafter more fully described and particularly pointed out in the appended claims.

l In describing the invention in detail reference will be had to the accompanying drawings wherein like characters of reference denote corresponding parts in the several views, and in whichy Figure 1 is a vertical section through a piston having the invention associated therewith; Fig. 2, a section lon the line 2-2 of Fig. 1, and Fig. 3, a perspective view of the adjustable bushing.

Referring to the drawings 10 designates a piston of the type employed in internal Acombustion engines although it will be understood that the invention can be associated with various types of pistons irrespective of the .particular device in which they are used. The piston 10 is provided with circumscribing grooves 11 in .which are seated respectively the usual packing ring 12. The piston 10 is further provided with a transverse bore 13 which is interrupted centrally by a longitudinal recess 14 formed in the piston to receive one end of a connecting rod l5.

Disposed in each section of the bore 13 is a bushing A which is formed of a tubular member split longitudinally as at 16 and having a circumscribing flange 17 at one'end bearing against the wall of the recess 14 and preventing outward movement of the bushing A in the bore 13.

Rotatably mounted in the bushing A is a wrist pin 18 to which is connected the connecting rod 15 in the usual and well known manner.

Mounted in the piston 10 and extending longitudinally of the latter are adjusting screws 19 which bear at their inner ends against respective bushings A..

As the bushings A become worn it will be obvious that such wear can be taken up by operating the screws 19 inwardly against the bushings A to contract the latter, said contraction being permitted by the split 16. The adjacent edges of the bushings will be drawn closer together and their circumferences will be reduced ,without destroying their lcircularity and without causing any part thereof to be distorted whereby to frictionally Contact the wrist-pin and prevent the utmost freedom of movement thereof in the bushing.

What is claimed is l. The combination with a piston provided with a transverse bore and a longitudinal recess interrupting the bore and forming resulting bore sections, a longitudinally split tubular lbushing mounted in each bore section, a circumscribing fiange on the inner end of each bushing and bearing against the adjacent wall of the longitudinal recess, and means for contracting each bushing. 5

2. In combination, a piston provided with transversely arranged bore sections, a split, tubular bushing arranged in each of said sections, the confronting edges of each bushing normally spaced from each other, and one end of each bushing having a circumscribing flange of greater circumfc; ence tha" the bore and arranged at the inner terminal thereof, a wrist pin encircled by said bushings, and means for bringing the edges of either bushing into closer relationship and thereby reducing the circumference of the bushing and bringing it into closer relationship to said pin.

Patented J une S, igi.

of either bushing .bushing comprising a 3. In combination, a piston having a transverse bore and a longitudinal recess interrupting it and forming resulting bore sections, longitudinallysplit tubular onshings arranged one in each bore section and each Ahaving a circumsoribing flange on its inner `end and disposed to lie against the inner end of the A`adjacent bore section, a Wrist'pin mounted in, necting rod engaged therewith, and a plurality of means whereby the circumference may be reduced. L As an article of manufacture, a pistonlongitudinally slitted cylinder having an annular ilange on one of its ends, the slit extending through said flange.

,5. As 'an article of manufacture, a pistonsaid bushings, a conr :ideama bushing comprisingv a longitudinally'7 slitted yielding cylinder having an annular ange on one ,of its ends, the slit extending through said flange. f 6, As an article of manufacture, a pistonbushing comprising a longitudinally slitted cylinder having an annular iiange on one of its ends, the slit extending through said flange, the opposed edges of; both the cylindrical portion and the flange loeingy normally spaced apart but adapted to be brought into juxtaposition.,

1n testimony whereof I afiix my signature in the presence of two Witnesses..

FRANK D. KENNEDY.

Witnesses;

A. D. Swanson, CLYDE V. lAL'rnRs.

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