Two-way flow valve
US4919166A · kind A · utility
84Cited by
4References
8Claims
0Family size
Inventor
Key dates
| Filing date | Jun 27, 1989 |
| Grant date | Apr 24, 1990 |
| Priority date | — |
| Expiry date | Jun 27, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7835
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A two-way valve comprises a body containing two cylinders, a pair of valve assemblies, each comprising a piston which slides in a respective cylinder, each piston having a spindle extending from one end, a metering valve member which slides on the spindle and normally engages a valve seat at an end of the relevant cylinder, a circlip or other abutment on the spindle which engages the valve member and moves it away from the seat upon movement of the piston in one direction by hydraulic pressure, and a restraining spring inhibiting that movement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.