Hydraulic booster with back pressure control
US4274326A · kind A · utility
3Cited by
6References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 28, 1979 |
| Grant date | Jun 23, 1981 |
| Priority date | — |
| Expiry date | Feb 28, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/148
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A hydraulic power brake system in which a hydraulic power brake booster has one or more back pressure control valves to produce a restriction downstream of the booster control valve after the booster has been actuated to build up some booster power pressure. This back pressure on the booster control valve is effective to control hydraulic valve noise during booster operation. There is substantially no fluid restriction in the booster when the booster is not actuated. Three back pressure control valve arrangements are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.