Brake power multiplying device for automobile brake system
US4472997A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 1, 1982 |
| Grant date | Sep 25, 1984 |
| Priority date | — |
| Expiry date | Mar 1, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/57
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Brake power multiplying devices for automobile brake systems include a housing having a pressure responsive flexible diaphragm for dividing the inside chamber of the housing into a suction pressure chamber and a counter-pressure chamber. A piston made of a plastic material is attached to the diaphragm and houses an air valve and a control valve which are adapted to be actuated by a push rod operated by a driver of the automobile through a brake pedal or like operating member. A key member made of a metallic material is provided for holding the air valve on the piston. The key member includes a pair of outer holding arms having tip ends attached with rubber members so that it does not damage the plastic piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.