Flow rate regulation valve, rotating body, and belt-type stepless transmission
US8147364B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2007 |
| Grant date | Apr 3, 2012 |
| Priority date | — |
| Expiry date | Mar 2, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7837
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A flow control valve is provided in a primary pulley that is a rotor, and includes a first port; a second port; a working fluid channel formed between the first port and the second port and through which working oil passes; a check valve that is formed in the working fluid channel and is opened toward a first-port-side channel from a second-port-side channel of the working fluid channel; and a valve-opening control section (a guide member, a spool, a cylinder, and a drive pressure chamber) that is arranged at the check valve at the side of the second port, that forcibly opens the check valve when discharging the working fluid from the first port to the second port, and increases a channel resistance of the second-port-side channel as an opening amount of the check valve is small. The flow control valve can prevent over-discharge of the working fluid at the beginning of opening the valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.