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US 5,222,295 AGranted
Method for repairing diesel engine cylinder blocks
OwnerJohn W. Dorris, Jr.inventor
Life of this patent
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Abstract
A method and apparatus for restoring the dimensions of a worn engine cylinder block (11) to "as new" condition by the selective removal of spaced portions (20) and (30) of the cylinder block (11) followed by the replacement of the removed portions by specially contoured inserts (40) and (50) by an insert tool (70) that disposes the inserts (40) and (50) in a press-fit relationship in the cavities (20) and (30) formed by the removal process.
Claims14
A method for refurbishing a used engine cylinder block to its "as new" dimensions comprising the steps of:
- a) aligning a boring machine along the longitudinal axis of an elongated stepped shoulder bore in the cylinder block;
- wherein the upper portion of said bore has an enlarged diameter;
- and, wherein the reduced diameter lower portion of said bore is provided with a plurality of peripheral grooves dimensioned to receive a plurality of conventional O-ring seals;
- b) removing first and second widely spaced selective portions along the longitudinal axis of the cylinder bore with the boring machine to create spaced first and second cavities within the cylinder block;
- wherein, said first cavity increases the depth of the enlarged diameter upper portion of said bore;
- and wherein the second cavity enlarges the diameter of selected portions of the reduced diameter lower portion of said bore;
- c) installing first and second replacement inserts into said first and second cavities formed in the bore;
- wherein, said first and second replacement inserts are configured similarly to said first and second selective portions of said bore.
5 more elements
Dependencies are inferred from the claim text.