US 4,050,139 AGranted

Piston pin installing and removing apparatus

AssigneeBorroughs Tool & Equipment Corporation

InventorJames A. Okamuro

Life of this patent

Estimating the term…

Loading patent…

Abstract

A component for use in a piston pin remover and replacer device for assembling and disassembling the piston pin connection between a connecting rod and a piston head. The component is comprised of a base and an anvil member mounted on the base. The anvil member has a bifurcated portion which is composed of a pair of spaced apart legs which are spaced upwardly from the base. A rim is mounted on the inside part of the legs and extends coextensively therewith. The rim also extends in an arc between the legs at the bight portion of the bifurcated portion. A hollow sleeve member has an opening therein, the extended axis of which extends between the spaced apart legs and is equidistant from the rim throughout all parts of the arc. An arbor member is slidably mounted in the hollow sleeve member. A stop is provided inside the hollow sleeve member and a spring is provided for urging the arbor member to a position extending out of the hollow sleeve member and away from the stop. The arbor member has a pair of spacers thereon, one spacer being reciprocably mounted on the arbor member and the other spacer being removable from a position between the first-mentioned spacer and the free end of the arbor member.

Claims7

Dependent claims

A component for use in a piston pin remover and replacer device for assembling and disassembling the piston pin connection between a connecting rod and a piston head, said piston head having spaced walls which each have a first opening therein aligned with the other first opening, wherein said connecting rod has an end having a second opening therein adapted to receive said piston pin therein and wherein a clearance space exists between said end and said spaced walls of said piston head which have said aligned first openings therein, said component comprising:

base means;
a hollow sleeve member mounted on said base and having an opening therein;
and
an anvil member spaced from said hollow sleeve member and having a body portion and a bifurcated portion, said bifurcated portion being comprised of a pair of spaced apart legs spaced from said hollow sleeve member;
a rim of predefined uniform thickness thinner than the thickness of said legs mounted on the inside part of said legs and extending inwardly therefrom and coextensively therewith, the inner edge of said rim also extending in an arc between said legs at the bight portion of said bifurcated portion, both of the oppositely facing surfaces on said rim being flat and parallel with each other and contained in planes perpendicular to the extended axis of said opening in said hollow sleeve member which axis extends between said spaced apart legs and is equidistant from said rim throughout all parts of said arc whereby said rim directly engages and supports said end of said connecting rod with said first and second openings in alignment when a piston pin is forceably driven by drive pin means for movement relative to said end and said piston head to effect one of a removal and a replacement of said piston pin between said connecting rod and piston head;
and
an arbor member reciprocally and slidably movable in said hollow sleeve member, stop means in said hollow sleeve member, resilient means for resiliently urging said arbor member away from said stop means and out of said hollow sleeve member, said arbor member having a diameter accommodating reception in said aligned first and second openings whereby said arbor member is urged toward said stop means in response to an engagement with a piston pin moving relative to said connecting rod and piston head during assembly, said arbor member having a sufficient length to engage said stop means and simultaneously limit the extent of travel of said piston pin.

4 more elements

base means including a support member laterally spaced from an anvil member on said base means and adapted for directly supporting said connecting rod at a location spaced from said one end of said connecting rod, said supporting member including resilient means for yielding to high forces applied to said connecting rod;
a hollow sleeve member mounted on said base and having an opening therein receiving said anvil member;
and
said anvil member being spaced upwardly from said hollow sleeve member and having a body portion and a bifurcated portion, said bifurcated portion being comprised of a pair of spaced apart legs spaced from said hollow sleeve member;
a rim of predefined uniform thickness thinner than the thickness of said legs mounted on the inside part of said legs and extending inwardly therefrom and coextensively therewith, the inner edge of said rim also extending in an arc between said legs at the bight portion of said bifurcated portion, both of the oppositely facing surfaces on said rim being flat and parallel with each other and contained in planes perpendicular to the extended axis of said opening in said hollow sleeve member which axis extends between said spaced apart legs and is equidistant from said rim throughout all parts of said arc whereby said rim directly engages and supports said end of said connecting rod with said first and second openings in alignment when a piston pin is forceably driven by drive pin means for movement relative to said end and said piston head to effect one of a removal and a replacement of said piston pin between said connecting rod and piston head.

2 more elements

Dependencies are inferred from the claim text.