Multifunction valve for use in a hydraulic component
US7451780B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 16, 2006 |
| Grant date | Nov 18, 2008 |
| Priority date | — |
| Expiry date | Apr 15, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7777
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A valve apparatus is disclosed for use in regulating the flow of fluid between a closed hydraulic loop and a fluid source in a hydraulic circuit, where the valve apparatus provides up to four different functions including a check valve, a neutral valve, a relief valve and a pressure rise rate valve. The apparatus includes a valve seat for selectively permitting fluid communication between the closed hydraulic loop and the fluid source, a sleeve member and a relief poppet in the valve seat, a relief compression spring inside the sleeve and positioned adjacent the relief poppet and the base of the slidable member, a valve guide and an accumulator piston slidably mounted within the valve guide to define an accumulator volume therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.