Fluid control valves
US4763873A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 24, 1987 |
| Grant date | Aug 16, 1988 |
| Priority date | — |
| Expiry date | Mar 24, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M59/46
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fluid control valve comprises a valve member slidable in a bore about one end of which is defined a seating. The valve member has a valve head located in a first chamber which in use is connected to a source of fluid under pressure. Below the valve head the valve member and bore define a second chamber into which fluid can flow from the first chamber when the control valve is open. The first chamber has an end wall which is engaged by the valve head in the open position and the end wall and valve head define a recess. In the open position of the valve the pressure in the recess is low but when fluid is supplied to the recess the pressure therein increases and the valve member moves to the closed position to prevent flow of liquid between the first and second chambers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.