Power assisted brake for motor vehicles
US6367364B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 26, 2000 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | Sep 26, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/57
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a brake force booster for automotive vehicles with a booster housing having its interior space subdivided by a movable wall into a vacuum chamber and a working chamber, and with a control valve which controls a pressure differential that acts upon the movable wall and is accommodated in a control housing that carries the movable wall, the said control valve being comprised of at least two concentrically arranged sealing seats and a valve member which defines in the control housing a pneumatic chamber that can be acted upon by the pneumatic pressure that prevails in the working chamber wherein the valve member includes at least two sealing lips of different diameters which define the pneumatic chamber in the control housing, and that the effective pneumatic surface of the chamber which is influenced by the difference in diameters is generally in conformity with the pneumatic surface defined between the two sealing seats.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.