Back-up pressure intensifier for master cylinder failure
US5577384A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 1995 |
| Grant date | Nov 26, 1996 |
| Priority date | — |
| Expiry date | Jun 22, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/142
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A braking unit includes an intensifier mechanism for intensifying a braking liquid pressure of a master cylinder upon failure of a liquid pressure booster. The braking unit comprises the intensifier mechanism for intensifying the braking liquid pressure of the master cylinder when actuated, and a control valve which makes the intensifier mechanism operable upon failure of the liquid pressure booster. The control valve comprises a valve member which is urged by a spring tensioned with a given load and which is urged in the opposite direction from the spring by a liquid pressure of a power chamber of the liquid pressure booster. The valve member makes the intensifier mechanism operable whenever the resilience of the spring exceeds the urging force produced by the liquid pressure in the power chamber of the liquid pressure booster. This prevents an operational lag of the intensifier mechanism in the event the liquid pressure booster fails.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.