Relief valve
US6532987B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2000 |
| Grant date | Mar 18, 2003 |
| Priority date | — |
| Expiry date | Feb 11, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7939
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A relief valve having a cylindrical case with one side thereof communicated with a fluid-pressure source, a relief piston accommodated in the cylindrical case and slidable therein, a return spring for pressing the relief piston against the fluid-pressure source, a damper chamber provided on a rear-surface side of the relief piston, said damper chamber communicated with the fluid-pressure source through an orifice of the relief piston and used for displaying a buffer action against an operation of the relief piston, and a relief hole bored through a wall of the cylindrical case, the relief hole communicated with the fluid-pressure source when the relief piston retreats due to an increase in pressure generated by the fluid-pressure source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.