Check valve assembly
US4673000A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1986 |
| Grant date | Jun 16, 1987 |
| Priority date | — |
| Expiry date | Jul 18, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K15/142
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An O-ring is received in a groove having only an arcuate portion thereof operative to act as a check valve, with the arcuate portion being movable into a chordal recess so that it does not provide full circumferential sealing engagement in the area of the arcuate portion, allowing fluid pressure or flow therethrough so long as the arcuate portion is so displaced. The resilient character of the O-ring urges the arcuate portion back to the closed position along a tapered ramp surface of the recess into which it was displaced when there is no pressure differential acting across the O-ring. Movement of the O-ring support member relative to a fixed surface normally sealed by the O-ring and net pressure forces on the O-ring may also tend to return the O-ring to the closed position in one direction of movement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.