Brake booster
US3974741A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 18, 1975 |
| Grant date | Aug 17, 1976 |
| Priority date | — |
| Expiry date | Apr 18, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/57
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A brake booster unit has a housing composed of a front and a rear shell element detachably coupled with each other; a resilient diaphragm is mounted in the interior space of the housing for mechanical separation thereof into a vacuum chamber and a atmospheric pressure chamber; a sleeve member and a motion-transmitting rod concentrically arranged thereto and connected with a brake pedal are partially introduced sealingly and movably into the interior of the atmospheric chamber; first valve means is formed between the rod and the sleeve for "on-off" control of fluid communication between the atmospheric pressure chamber and ambient atmospheric pressure; second valve means includes a beaded inner periphery of the diaphragm and acting as a valve seat; a valving portion to mate with the diaphragm is formed on the sleeve and has a configuration preventing unintentional radial displacement of the beaded periphery while the booster unit is urged toward its operating position; the second valve means is kept at its "closed" position when interruption of fluid communication between the both chambers is required.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.