Pressure limiter for hydraulic brake booster
US4362086A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 14, 1980 |
| Grant date | Dec 7, 1982 |
| Priority date | — |
| Expiry date | Jul 14, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/162
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The present invention relates to an improvement in a hydraulic brake booster, and in particular, covers a structure which provides a pressure limiter for the hydraulic brake booster. The booster comprises a housing which defines a pressure chamber and supports a control valve and a piston. During braking the control valve cooperates with an actuator to move relative to the housing so as to communicate pressurized fluid to the pressure chamber and the piston is movable in response to the pressurized fluid within the pressure chamber to effectuate braking. In order to limit the level of pressure of pressurized fluid communicated to the pressure chamber a ring is disposed within the housing in cooperation with the control valve. The ring cooperates with the control valve to define a differential area which is exposed to pressurized fluid to generate a force opposing movement of the control valve so that communication of pressurized fluid to the pressure chamber is limited. In a preferred embodiment the ring is integrally formed with a sleeve to form a differential area responsive to the pressurized fluid communicated to the pressure chamber and the sleeve cooperates with a resilient m…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.