US 9,810,332 B2
Pressure relief valve devices and methods
Eric M. Chapman, Santee, CA (US); and Mark S. Olsson, La Jolla, CA (US)
Assigned to DEEPSEA POWER & LIGHT, INC., San Diego, CA (US)
Filed by Eric M. Chapman, Santee, CA (US); and Mark S. Olsson, La Jolla, CA (US)
Filed on Mar. 28, 2014, as Appl. No. 14/229,770.
Claims priority of provisional application 61/809,854, filed on Apr. 8, 2013.
Prior Publication US 2014/0347867 A1, Nov. 27, 2014
Int. Cl. F16K 17/06 (2006.01); F21V 31/03 (2006.01); F21V 31/00 (2006.01); F16K 17/04 (2006.01); F16K 1/42 (2006.01); F16K 1/46 (2006.01); F16K 15/06 (2006.01)
CPC F16K 17/06 (2013.01) [F16K 1/42 (2013.01); F16K 1/465 (2013.01); F16K 15/063 (2013.01); F16K 17/04 (2013.01); F21V 31/005 (2013.01); F21V 31/03 (2013.01); Y10T 137/7932 (2015.04)] 19 Claims
OG exemplary drawing
 
1. A pressure relief valve for high pressure operation, comprising:
a plunger assembly including an elongate threaded shaft at a first end and a compliant cone-shaped sub-section with a smooth faced sealing surface at a second end opposite the first end;
a body for withstanding deep ocean external pressure of a depth of at least 1000 meters, the body including a cavity with a conical-shaped mating surface to receive the smooth-faced sealing surface of the plunger assembly, and a clip to restrain the plunger assembly at the second end;
a compression spring disposed between a portion of the plunger assembly and the body sized to withstand corresponding pressures of at depth of at least 1000 meters; and
one or more seals disposed between the body mating surface and the sealing surface of the plunger assembly; wherein the body mating surface and the sealing surface are held in contact by the compression spring.