Broach tool and method of repair
US6470846B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2000 |
| Grant date | Oct 29, 2002 |
| Priority date | — |
| Expiry date | Nov 15, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01M9/102
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.