The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 12, 2014
Filed:
Dec. 13, 2011
Applicant:
Axel Heise, Mainz, DE;
Inventor:
Axel Heise, Mainz, DE;
Assignee:
GM Global Technology Operations LLC, Detroit, MI (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K 17/38 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method and apparatus to periodically inspect and control piston movability are provided that can include using a contactless sensor system through a gas outlet port of a pressure relief device. By moving a stop, relative movement of the piston can be compared to the fixed body reflecting a movability or a blocking of the release piston. Inductive/magnetic or optical borescope sensors can detect piston movement through the gas outlet, for example. The activation function where the piston must move when activated can therefore be tested and maintained.