Hydraulic brake apparatus for a vehicle
US6550245B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2001 |
| Grant date | Apr 22, 2003 |
| Priority date | — |
| Expiry date | Jul 31, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T8/4845
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A vehicle hydraulic brake apparatus includes a brake member, a master cylinder generating brake hydraulic pressure, and a master piston movable in response to operation of the brake member. A closed chamber is defined by the master piston and a power piston is disposed behind the master piston. A power chamber is defined by the power piston rearwardly of the power piston. An auxiliary hydraulic pressure source generates power hydraulic pressure and a pressure regulating device regulates the output power hydraulic pressure and feeds it to the power chamber. A reaction force member is disposed in a front end portion of the power piston and is exposed towards the closed chamber. A retaining device maintains the reaction force member exposed towards the closed chamber, with the rearward reaction force of the master piston being transmitted to a front end portion of the power piston while bypassing the reaction force member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.