Fluid handling – Destructible or deformable element controlled – Heat destructible or fusible
Reexamination Certificate
2005-03-15
2005-03-15
Rivell, John (Department: 3753)
Fluid handling
Destructible or deformable element controlled
Heat destructible or fusible
C137S079000, C220S089400
Reexamination Certificate
active
06866057
ABSTRACT:
A thermal-pressure relief device, which has an adapter (20) threaded into the wall of a pressure vessel. The adapter contains an orifice (22) therethrough in line with a recessed cavity (32) which includes a raised stem (34). A blow out member (30) rests on the stem and overlaps the orifice to obstruct communication with the fluid inside the vessel. The blow out member is attached within the cavity by brazing with a filler metal in the form of a temperature responsive amalgam (38), preferably a eutectic alloy. When ambient temperatures are elevated above the melting point of the amalgam the blow out member is released freeing the orifice relieving the pressure within the vessel preventing a sudden structural failure. Optionally a protective cover in the form of a cap (42) with an impact surface (40) contains the blow out member when it separates from the adapter and a number of vents (48) diffuse the fluid from the pressure vessel in a safe direction. Another option for the protective cover is a tube (54) attached to the adapter with fastening means such that when the blow out member is released the conduit provides a safe structurally sound flow path permitting the pressurized fluid to be directed into a safe zone away from the thermal-pressure relief device.
REFERENCES:
patent: 900763 (1908-10-01), McNutt
patent: 1734186 (1929-11-01), Lucien et al.
patent: 1973182 (1934-09-01), Shaw
patent: 2998018 (1961-08-01), Beck et al.
patent: 5762091 (1998-06-01), Sarne et al.
patent: 689809 (1953-04-01), None
Anderson Gordon K.
Rivell John
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