Braking pressure control apparatus capable of switching between two brake operating states using power-operated and manually operated pressure sources, respectively
US6957870B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2000 |
| Grant date | Oct 25, 2005 |
| Priority date | — |
| Expiry date | Dec 15, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T2270/613
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A braking pressure control apparatus including a first pressure source including a power-operated pressurizing device, a second pressure source operable by a manually operable brake operating member to pressurize a fluid to a pressure higher than a level corresponding to the operating force of the brake operating member, a switching device for selectively placing the braking system in a first state in which a brake cylinder is operated with the fluid pressurized by the first pressure source and a second state in which the brake cylinder is operated with the fluid pressurized by the second pressure source, and a change restricting device operable upon a switching between the first and second states, to restrict a change of the operating state of the brake operating member and a change of the brake cylinder pressure, which change take place due to the switching, or a switching control device for controlling the switching device on the basis of the running condition of a vehicle whose wheel is braked by the braking pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.