Brake unit with a hydraulic boosting device
US4404803A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 18, 1981 |
| Grant date | Sep 20, 1983 |
| Priority date | — |
| Expiry date | Mar 18, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T11/18
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A brake unit comprising a hydraulic booster unit connected to hydraulic auxiliary energy and controllable by a brake pedal via a control piston drives a master brake cylinder unit to supply brake pressure to wheel brake cylinders through at least one hydraulic line connected to an output of the master brake cylinder unit. A bypass line connected to the work chamber of the booster unit supplies a preliminary feed of the auxiliary energy to the wheel brake cylinders to overcome the brake clearance. A two way, two position changeover valve is connected to the hydraulic line, the bypass line and the wheel brake cylinders to connect during a braking operation either the bypass line or the hydraulic line to the wheel brake cylinders dependent on the pressure in the two lines. This brake unit requires only a few hydraulic connections external of the unit, has a single construction, has small dimensions, has exact operation and has quick response.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.