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:
Oct. 06, 2015
Filed:
Dec. 18, 2012
Applicant:
Tescom Corporation, Elk River, MN (US);
Inventors:
Eric Jacob Burgett, Maple Grove, MN (US);
Brian J. Tutt, Brainerd, MN (US);
Assignee:
TESCOM CORPORATION, Elk River, MN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K 17/36 (2006.01); F16K 31/124 (2006.01); F16K 31/02 (2006.01); F16K 31/122 (2006.01); F16K 31/00 (2006.01); F15B 15/24 (2006.01); F16K 31/04 (2006.01);
U.S. Cl.
CPC ...
F16K 17/36 (2013.01); F15B 15/24 (2013.01); F16K 31/003 (2013.01); F16K 31/02 (2013.01); F16K 31/047 (2013.01); F16K 31/124 (2013.01); F16K 31/1221 (2013.01); F16K 31/1225 (2013.01);
Abstract
Fail-safe apparatus for use with fluid valves are disclosed herein. An example fail-safe apparatus includes a first piston, a second piston movably coupled relative to the first piston, and a fluid chamber between the first and second pistons to receive a control fluid. The control fluid is to operatively couple the first and second pistons when the control fluid is provided in the fluid chamber. The first piston is operatively decoupled from the second piston when at least some of the control fluid is removed from the fluid chamber.