Master cylinder for motor vehicle electro-hydraulic braking installation
US6192685A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 1999 |
| Grant date | Feb 27, 2001 |
| Priority date | — |
| Expiry date | Jan 8, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T15/14
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A master cylinder (32) in a vehicle hydraulic braking installation uhydraulic-fluid supply device for actuating wheel brake cylinders (20). The master cylinder (32) being isolated from the wheel brake cylinders (20) by at least one shut-off valve (30). The master cylinder (32) being associated with a simulator (46) having a piston (50) located in a simulator chamber (56). The piston (50) being subjected to fluid pressure of brake fluid from the master cylinder (32) and an elastic element (52). The master cylinder (32) being of the having a primary piston (44) and a secondary piston (60) slidably located in a bore (45) of a housing (48). Bore (45) has a peripheral groove (72) which is associated with a land (68) on the secondary piston (60) to allow communication with the simulator chamber (56) when the master cylinder (32) is in a positon of rest. A sealing element (70) carried by the secondary piston (60) engages the housing when the secondary piston moves to interrupt communicaton between the bore (45) and simulator chamber (56) to thereafter simulate brake actuation travel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.