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:
Jun. 02, 2015
Filed:
Sep. 27, 2012
Applicant:
Greenlee Textron Inc., Rockford, IL (US);
Inventor:
Gerald Jonathan Tully, Elgin, IL (US);
Assignee:
TEXTRON INNOVATIONS INC., Providence, RI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B25B 23/145 (2006.01); B25F 5/02 (2006.01); B25F 5/00 (2006.01);
U.S. Cl.
CPC ...
B25F 5/02 (2013.01); B25B 23/1453 (2013.01); B25F 5/005 (2013.01); B25F 5/008 (2013.01);
Abstract
A relief valve assembly limits the maximum torque of a gear motor of a hydraulically driven tool. The relief valve assembly dumps flow to a return channel to return hydraulic fluid to the supply when the relief valve assembly is activated. The relief valve assembly is placed in the channel of a directional valve spool, and varies its pressure setting depending upon spool position. This is useful to vary the pressure settings of a hydraulic motor in different directions.