Pneumatic booster
US5425302A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1993 |
| Grant date | Jun 20, 1995 |
| Priority date | — |
| Expiry date | Jul 30, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/575
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The invention relates to a pneumatic brake-booster comprising a casing (10) inside which is a piston formed of a back tubular part (22) supporting a skirt (14) and which, with the aid of an unrolling membrane (12), defines a front chamber (16) connected permanently to a source of partial vacuum and a back chamber (18) connected selectively to the front chamber (16) or to the atmosphere via a valve (40) actuated by a control rod (34) capable of bearing, through the intermediary of the front face of a plunger (32), on a first face of a reaction disk (58) securely attached through a second face to a thrust rod (56). According to the invention, the piston (20) bears against the reaction disk (58) through a resilient annular front face (68, 68').
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.