Patent · US Active

Pressure relief valves

US8281804B2 · kind B2 · utility

4Cited by

7References

23Claims

0Family size

Assignee

Fisher Controls International LLC · US

Inventors

Chun Lin · New Taipei, TW
Roy Ronald Pelfrey · Sherman, US

Key dates

Filing date	Jul 8, 2008
Grant date	Oct 9, 2012
Priority date	—
Expiry date	Dec 23, 2030

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/7905
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

Pressure relief valves are described herein. An example pressure relief valve includes a body having external threads to threadably engage another body having a pressurized chamber. Additionally, the pressure relief valve includes a relief valve orifice that is threadably engaged with the body via internal threads of the body. The relief valve orifice includes a seating surface. Further, the pressure relief valve includes a pressure-balanced piston assembly that is slidably movable within the body relative to the relief valve orifice and the seating surface to control the flow of fluid between the pressurized chamber and the relief valve orifice.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.