Master cylinder with valves having reduced clutch pedal free play
US6425245B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 30, 1998 |
| Grant date | Jul 30, 2002 |
| Priority date | — |
| Expiry date | Oct 30, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T11/16
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A master cylinder having a body (10) with a bore (12) therein in which slides at least a primary piston (20). The primary piston (20) has a compensation passage (58), which in a position of rest, places a pressure chamber (24) in communication with a reservoir (14). The communication between interrupted upon actuation of the master cylinder by a control rod (18) acting on a second piston (48) sliding in the bore (12). A first compression spring (28) and a second compression spring (42) urge the primary piston (20) and second spring (16) toward a rear position of rest. The preload force of the first compression spring (28) exceeding that of the second compression spring (16) such that the second piston (48) is the first to move in response to a force applied to the control rod (18). The rear position of rest for the primary piston (200 and second piston (48) is defined by a same stop (36) which is integral with the body (10) of the master cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.