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:
Jan. 05, 2016
Filed:
Apr. 27, 2012
Jason Scot Richardson, Chuckey, TN (US);
Jason Lee Emmette, Greeneville, TN (US);
Richard C. Hynes, Chuckey, TN (US);
Brook Cutshaw, Greeneville, TN (US);
Somer R. Malone, Chuckey, TN (US);
Michael T. Crosby, Jonesborough, TN (US);
Jason Scot Richardson, Chuckey, TN (US);
Jason Lee Emmette, Greeneville, TN (US);
Richard C. Hynes, Chuckey, TN (US);
Brook Cutshaw, Greeneville, TN (US);
Somer R. Malone, Chuckey, TN (US);
Michael T. Crosby, Jonesborough, TN (US);
Parker-Hannifin Corporation, Cleveland, OH (US);
Abstract
A hydraulic apparatus is provided with a return to neutral mechanism for returning a trunnion control bracket arm to a neutral position. The return to neutral mechanism comprises a pair of springs, one spring connecting a fixed bracket to a first rotatable bracket and the other spring connecting the fixed bracket to a second rotatable bracket. The mechanism uses springs with different spring constants and the springs are attached to the brackets in a single plane.