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:
Apr. 17, 2018
Filed:
Jul. 04, 2014
Parker Hannifin Corporation, Cleveland, OH (US);
Kinetics Drive Solutions Inc., Langley, British Columbia, CA;
Per-Ola Vallebrant, Trollhaettan, SE;
Stefan Haellgren, Trollhaettan, SE;
John Czepak, Burnaby, CA;
Gerald Dyck, Abbotsford, CA;
Parker-Hannifin Corporation, Cleveland, OH (US);
Kinetics Drive Solutions Inc., Langley, British Columbia, GB;
Abstract
A hydrostatic assembly employing a 1hydraulic piston drive unit is described in which the output is increased without using additional servo assemblies by incorporating a 2hydraulic piston drive unit, coupling the drive shafts of both drive units together, and employing a common means to simultaneously adjust displacement of both the 1and 2hydraulic piston drive units. In such embodiments, coupling the drive shafts together such that the 1hydraulic piston drive unit is rotationally offset with respect to the 2hydraulic piston drive allows for a reduction in the amplitude of pressure pulsations associated with the hydrostatic assembly output, thereby smoothing out operation and improving durability.