Tandem master cylinder for hydraulically operated vehicular brakes
US4550567A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 26, 1983 |
| Grant date | Nov 5, 1985 |
| Priority date | — |
| Expiry date | Oct 26, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T11/20
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A tandem master cylinder which has a compensating bore in communication with a chamber on the rear side of the master piston. The bore is provided in the front wall of master cylinder piston and is adapted to be closed by means of valve body movable relative to said master cylinder piston. The valve body is provided on the end of a central clamping element interconnecting the two spring retainers of a piston restoring spring of master cylinder piston. The valve body is urged against compensating bore as soon as the piston restoring spring is loaded. In order to maintain a predetermined filling pressure in the chamber behind the master cylinder piston and in the output position of the piston in pressure chamber, the piston restoring spring is supported on a spring retainer that is held through a stop on the cylinder housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.