Fluid pressure boosting device
US6655140B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 2002 |
| Grant date | Dec 2, 2003 |
| Priority date | — |
| Expiry date | Jun 21, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/145
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
In a fluid pressure boosting device 1 of the present invention, a control valve 4 is composed of a supply valve 44 and a discharge valve 45, the supply valve 44 comprises an annular valve cone 46 of a poppet type and a first valve seat 7 and the discharge valve 45 comprises an annular valve cone 46 of a poppet type and a second valve seat 8. Inside a rear end portion of a primary piston 21 of a master cylinder 2, a reaction disk 57 made of an elastic material such as rubber is fitted. An input shaft 3 penetrating the control valve is arranged such that, in the inoperative state, an end thereof confronts the reaction disk 57 with a predetermined space therebetween and, in the operative state, the end comes in contact with said reaction disk 57 so that a reaction force is transmitted to the input shaft 3. The passage for discharging hydraulic fluid of the power chamber 9 is composed of annular passages 52, 53. Therefore, a fluid pressure boosting device of a center valve type can be provided of which the structure for attaining the jumping characteristic and the structure of passage for discharging hydraulic fluid are simple.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.