Hydraulic booster with accumulator control
US4230018A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 22, 1979 |
| Grant date | Oct 28, 1980 |
| Priority date | — |
| Expiry date | Feb 22, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/144
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A hydraulic power brake system in which a hydraulic power brake booster has an accumulator operable when there is insufficient power to operate the power brake with hydraulic pressure. The accumulator control valve is actuated by a cylindrical cam normally radially displaced so that its axis is not coincident with the axis of the booster. Sufficient actuating movement of the control portions of the booster cause the cam to move axially and radially so that its axis moves in a direction to be coincident with the axis of the booster, causing the accumulator control valve to be opened in a controlled manner and admit accumulator pressure to the booster power chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.