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:
Sep. 22, 2015
Filed:
Dec. 12, 2012
Parker-hannifin Corporation, Cleveland, OH (US);
Richard C. Hynes, Chuckey, TN (US);
Jason Scot Richardson, Chuckey, TN (US);
Parker-Hannifin Corporation, Cleveland, OH (US);
Abstract
A return to neutral mechanism is provided for hydraulic apparatuses such as motors/pumps that utilize a swashplate and a trunnion arm to control flow. The return to neutral mechanism includes two rotating brackets which have ends aligned to a single plane. Two springs are utilized and attached to the ends of the two rotating brackets giving the force mechanism the ability apply the force in a direct path, reducing friction, increasing life, and improving accuracy. This design is an 'x' type mechanism, the force arms are in-line and do not cross, the force is applied equally on both sides of the fulcrum and therefore balanced. The mechanism can be can be used with compression springs, tension springs, torsion springs, or leaf springs.