Emergency pressure relief valve with enhanced reset

Details Emergency pressure relief valve with enhanced reset Emergency pressure relief valve with enhanced reset

2005-12-27

2005-12-27

Krishnamurthy, Ramesh (Department: 3753)

Fluid handling

Line condition change responsive valves

Direct response valves

C137S528000, C137S906000, C251S054000

Reexamination Certificate

active

06978799

ABSTRACT:
A pressure relief valve has a housing fluidly connected to a pressurized system line carrying a system fluid. The housing carries a moveable piston and a valve member that both move between closed and open positions. The piston defines an upper chamber and a lower chamber within the housing. A pressurized fluid is supplied to the upper chamber to bias the piston toward the closed position. After the relief valve opens from excessive system pressure, the pressurized fluid is injected into the lower chamber to delay the return of the piston to the closed position. Initially, the fluid in the lower chamber flows through a check valve while the piston returns to the closed position. Then the fluid vent in the lower chamber vents from the lower chamber as the piston and valve member approach the closed position.

REFERENCES:
patent: 1379092 (1921-05-01), Fraccascia et al.
patent: 1889256 (1932-11-01), Lipscomb et al.
patent: 2361881 (1944-10-01), Sheppard
patent: 2506162 (1950-05-01), Metzgar
patent: 3789872 (1974-02-01), Elliott
patent: 3845876 (1974-11-01), Needham et al.
patent: 3881480 (1975-05-01), Lafourcade
patent: 3942551 (1976-03-01), Schuller et al.
patent: 4046164 (1977-09-01), Pool
patent: 4221204 (1980-09-01), Meyer
patent: 4274434 (1981-06-01), Hafele
patent: 4321945 (1982-03-01), Chabat-Courrede
patent: 4485843 (1984-12-01), Wolff
patent: 4531542 (1985-07-01), Looney
patent: 4716930 (1988-01-01), Richmond et al.
patent: 5441072 (1995-08-01), Indey et al.
patent: 5443088 (1995-08-01), Hoch et al.
patent: 5685334 (1997-11-01), Hagan
patent: 5787926 (1998-08-01), Mukumoto et al.
patent: 6209561 (2001-04-01), Kugelev et al.
patent: 2355510 (2001-04-01), None
Reset Relief Valves brochure; Harrisburg, Inc; 1982.
Retsco Inc.; Valve illustration; Aug. 1992.
An Introduction to Rupture Disk Technology catalog; BS&B; 1994.
Emergency Relief Valve brochure; SPM; Apr. 1997.
BJ 285959; Popoff Valve information; BJ Services; undated.

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