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:
Dec. 02, 2014
Filed:
Dec. 22, 2011
Jacob Ballweg, Waukesha, WI (US);
Gary J. Pieper, Eagle, WI (US);
Corey K. Quinnell, West Allis, WI (US);
Jonathan M. Starkey, Bowdon, GB;
Eric P. Hamkins, Waukesha, WI (US);
Jacob Ballweg, Waukesha, WI (US);
Gary J. Pieper, Eagle, WI (US);
Corey K. Quinnell, West Allis, WI (US);
Jonathan M. Starkey, Bowdon, GB;
Eric P. Hamkins, Waukesha, WI (US);
HUSCO International, Inc., Waukesha, WI (US);
Abstract
A system has a variable displacement pump that supplies pressurized fluid to power a plurality of hydraulic functions. Each hydraulic function has a control valve with a variable source orifice controlling fluid flow between the pump and a flow summation node, and a variable metering orifice controlling fluid flow between the flow summation node and a hydraulic actuator. Variable bypass orifices in the control valves are connected in series between the flow summation node and a tank. As the metering orifice in a control valve enlarges, the source orifice enlarges and the bypass orifice shrinks. This alters pressure at the flow summation node, which is used to control the output of the pump. Components are provided to give selected hydraulic functions different levels of priority with respect to consuming fluid flow from the pump.