Composite housing for rack and pinion power steering gear
US4788877A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 1987 |
| Grant date | Dec 6, 1988 |
| Priority date | — |
| Expiry date | Mar 9, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/472
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A composite housing for a rotary valve rack and pinion power steering gear includes a pinion housing portion fabricated of a light weight first metal and valve housing portion fabricated of a more dense and abrasion resistant second metal. The pinion housing portion includes a main body having a pinion bore therein. The valve housing portion is a right circular cylinder with an annular neck thereon. The annular neck is press fitted into a counterbore around the pinion bore whereby the valve housing portion is connected to the pinion housing portion. The pinion housing portion has an annular groove in an inside surface of the counterbore and a plurality of molding passages connected to the groove. The neck of the valve housing portion has an annular groove which cooperates with the groove in the counterbore in defining an annular ring chamber. Curable plastic is injection molded into the ring chamber and, when cured, defines a retaining ring providing a redundant connection between the valve housing portion and the pinion housing portion of the composite housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.