Air booster with pressure-balanced valve
US4905571A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1988 |
| Grant date | Mar 6, 1990 |
| Priority date | — |
| Expiry date | Aug 31, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/44
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The invention provides a brake booster including in a preferred embodiment a housing, first and second annular flexible diaphragms spaced from one another forming a sealed second chamber within the housing and a sealed first chamber between the first diaphragm and the first end of the housing, a generally annular shaped power piston for connection with the master cylinder piston, a chamber valve seat separating the first and second chambers, an inlet valve slidably mounted within the power piston, and a control valve spring biased away from the power piston and connected with the pedal linkage and being slidably and sealably mounted within first end of the housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.