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:
Jul. 30, 2019
Filed:
Dec. 02, 2015
Parker-hannifin Corporation, Cleveland, OH (US);
Daniel Dyminski, Portage, MI (US);
Parker-Hannifin Corporation, Cleveland, OH (US);
Abstract
A pump barrel () for use in a hydrostatic pump assembly includes a barrel body () defining a plurality of piston bores () that receive a plurality of pistons moveable within the bores, and a porting face () that defines a plurality of ports () in fluid communication with the piston bores and providing fluid flow paths into and out from the barrel body. Each port () has a leading edge surface and a trailing edge surface relative to a direction of rotation of the pump barrel, said leading and trailing edge surfaces being oriented in a first direction (along line-) at non-right angles relative to the porting face (). Each port () has an inner edge surface () and an outer edge surface () relative to a radial direction of the pump barrel, said inner and outer edge surfaces () being oriented in a second direction (along line-) comprising a tilt angle () relative to the porting face () that is different from the angles in the first direction. A hydrostatic pump assembly incorporating such a pump barrel () is also disclosed.