Hydraulic brake booster and shield therefor
US4103593A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 15, 1976 |
| Grant date | Aug 1, 1978 |
| Priority date | — |
| Expiry date | Oct 15, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F2023/0025
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A hydraulic brake booster includes a housing that defines a pressure chamber. A piston slidably mounted in a housing bore is responsive to increasing pressures in the pressure chamber to move relative to the housing to actuate a braking mechanism, such as a master cylinder. The piston carries a sealing ring to slidingly seal the piston to the housing bore and a shield to protect the surface of the housing bore from atmospheric contaminates during long periods, when the hydraulic booster is in a brake-release position. The shield releasably connects to the piston and telescopes into a piston cavity for compact assembly with the piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.