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US 4,057,889 AGranted
Engine cylinder sleeve puller and method
OwnerMarvin D. Fergusoninventor
Life of this patent
Estimating the term…
Abstract
A puller supported atop the cylinder block has lugs or jaws engaging the underside of the cylinder wall ridge resulting from deposits of carbon and wear by piston rings, whereby screw force applied to the jaws through the puller is effective to pull the cylinder sleeve from the cylinder block. The piston is removed subsequently.
Claims12
A method for removal of cylinder tubes from cylinder blocks comprising the steps of:
- mounting a puller support on the cylinder block in registry with the open end of the cylinder tube;
- forcibly and rigidly engaging diametrically opposite areas on the inner cylindrical surface of the cylinder tube above a piston therein with a pair of puller jaws, in an arc greater than 90.degree. for each jaw, by applying force to said jaws in a direction radially outward with respect to the cylinder axis;
- then applying a force in the direction of the cylinder axis only to the puller jaws through the puller support to force the jaws towards the support and thereby pull the cylinder tube outwardly of the cylinder block as the jaws remain forcibly and rigidly engaged with said areas, but without increasing radially outward directed force on said jaws.
A puller for cylinder sleeves comprising:
- a drawbolt;
- a bolt support member mountable over a cylinder opening;
- a tube engaging member mountable in the cylinder tube and having two diametrically opposed jaws with arcuate wall-engaging outer surfaces on each jaw subtending arcs of at least 90.degree. for each jaw, said jaws being engageable with an inwardly extending ridge in the tube for interference engagement therewith;
- one of said members being threadedly received on the drawbolt to enable mechanically closing the space between said members by relative rotation between said one member and the drawbolt to forcibly pull the tube engaging member toward the support member and thereby pull the tube from the block,
- said tube engaging member including means operable independently of said drawbolt for moving said jaws radially outward and preventing inward movement with respect to a center line colinear with the axis of said bolt.
2 more elements
Dependencies are inferred from the claim text.