Molded camshaft assembly
US5320795A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1989 |
| Grant date | Jun 14, 1994 |
| Priority date | — |
| Expiry date | Dec 4, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/2101
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A camshaft assembly for an internal combustion engine includes a rotatable camshaft and a cam lobe mounted on the camshaft for rotation therewith. The cam lobe includes first and second axial ends and an integral crowned cam profile formed in its periphery which includes a radially extending shoulder located between the first and second ends. The shoulder may be formed by a pair of axially extending parallel tapered surfaces in the cam profile. A method of molding the camshaft assembly includes the steps of providing a mold including a die component closable to define a mold cavity having a first portion in the shape of a camshaft and a second portion in the shape of cam lobe which includes a crowned cam profile, filling the mold cavity with a shrinkable fluid plastics material, waiting a predetermined period of time to permit the plastics material in the second portion of the mold cavity to harden and shrink, and moving the die component in an axial direction to open the mold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.