Broach tool and method of repair
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Oct 29, 2002
Issued Date -
N/A
app pub date -
Nov 15, 2000
filing date -
Apr 29, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A broach tool is provided for use in repairing a camshaft support bearing for operably supporting a camshaft in an internal combustion engine. The engine includes a cylinder head with bearing support towers that operably support journals on the camshaft at multiple aligned bearing locations. A broaching tool is provided that is adapted to be linearly pulled through the aligned bearing locations to reform the bearing support structures. Methods of repair include enlarging at least one camshaft support bearing to an oversized condition, such as by using the broach, optionally repairing the oversized camshaft support bearing by filling voids and galled areas with a thermal setting polymer, as needed, and optionally positioning a bearing insert on the camshaft, and positioning the camshaft including the bearing insert in the camshaft support bearing with the camshaft being rotatably supported in the bearing insert and the bearing insert being secured to the oversized camshaft support bearing.
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