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Strelow; John L.
Broken Arrow, OK
No. of patents:

Patent Number Title Of Patent Date Issued
6298869 Reverse buckling, thermoformed, polymer rupture disk October 9, 2001
A thermoformed reverse buckling polymer rupture disk having an unsupported raised center portion including score lines cut in the polymer disk that creates a line of weakness to control the buckling pressure of the disk and forms a predetermined burst pattern.
6230733 Self-contained rupture disk cartridge May 15, 2001
A polymer rupture disk in the form of a cartridge or capsule that can be inserted in a fluid line fixture as a replaceable unit to establish a predetermined rupture pressure or safety pressure for that particular pressurized container.
5602372 Differential pressure flow sensor February 11, 1997
A "slip-joint" type of sensor having a tab design consisting of a unique shape which permits easy manufacture, low resistance to sliding forces, and reliable electrical contact. The unique switch or tab and body design provides positive electrical contact without the need for costly, ful
5558114 Eccentric scored rupture disk assembly September 24, 1996
A rupture disk with an annular flange that permits the disk to be clamped in place in a pressure system between an outlet holder and an inlet holder. The rupture disk is characterized by an eccentric score line formed on its annular flange radially outwardly beyond the dome of the ru
4842014 Check valve hanger mechanism June 27, 1989
The invention disclosed herein relates to a check valve clapper hanger mechanism from which a check valve clapper may be rotatably suspended in a check valve housing. The check valve clapper hanger mechanism is easily removable from the check valve housing and is capable of maintaining
4751938 Apparatus for supporting structure between bolted flanges June 21, 1988
Structure supporting apparatus which for a particular nominal size can be interchangeably sealingly clamped and centered between bolted flanges of varying pressure rating and design standard. The apparatus includes at least one support member having opposite parallel sides for sealingly
4669500 Check valve actuator June 2, 1987
The invention disclosed herein relates to a check valve actuator for opening and closing a check valve, utilizing system pressure. The check valve actuator is comprised of a piston connected to a clapper assembly by a connecting rod. The piston is slideably received in a piston cylinder
4269214 Safety pressure relief device May 26, 1981
A safety pressure relief device including a rupture disk having a concave-convex portion and a radially outer flange portion joined by a curved transition connection. An improved knife means is located adjacent the concave side of said rupture disk, said knife means including a radia
4236648 Safety pressure relief apparatus December 2, 1980
The present invention relates to a safety pressure relief apparatus comprised of a reverse buckling rupture disk having a concave-convex portion connected to an annular flat flange portion by a curved transition connection and a support member having an annular flat flange portion for

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