Pneumatic brake booster with control chamber
US6116141A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 24, 1998 |
| Grant date | Sep 12, 2000 |
| Priority date | — |
| Expiry date | Jul 24, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/72
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A pneumatic brake booster having a right casing (10) divided in a leaktight fashion by a first moving partition (12) into a front chamber (14) and a rear chamber (16). The front chamber (14) being permanently connected to a source of low pressure (V) with the rear chamber (16) being selectively connected to the front chamber (12) and as source of high pressure by a three-way valve (40) operated by an operating rod (34). A three-way and two position solenoid valve (68) has a first inlet connected to the source of low pressure (V), a second inlet connected to a source of high pressure (A) and outlet connected to the rear chamber (14). A second moving partition (54,54') divides the rear chamber (14) into a working chamber (16) and a control chamber (50,50') with the outlet of the solenoid valve (68) being connected to the control chamber (50,50'). A pneumatic piston (20) which passes in leaktight sliding through the second moving partition (54,54') has a stop (72) which engages and moves the second moving partition (54,54') when the pneumatic piston (20) moves in a forward direction. The second moving partition (54,54') independently moving into engagement with the first moving partit…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.