Brake booster with spring type ratio changer
US4087972A · kind A · utility
5Cited by
8References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 2, 1976 |
| Grant date | May 9, 1978 |
| Priority date | — |
| Expiry date | Aug 2, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/162
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A motor vehicle fluid power circuit is provided with a constant displacement pump, a control valve, an open center steering valve, and a brake booster with a spring type ratio changer. The brake booster includes an input rod which is connected to a brake pedal of the vehicle and an output rod which is connected to the brake master cylinder of the vehicle. One predetermined ratio of input rod movement to output rod movement is established under normal operating conditions, and a one-to-one ratio is established under emergency conditions when sufficient pressure from the pump is not available for the brake booster.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.