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:
Feb. 01, 2005
Filed:
Nov. 19, 2002
Robert H. Schneider, Beaver Dam, WI (US);
Robert H. Schneider, Beaver Dam, WI (US);
Actuant Corporation, Glendale, WI (US);
Abstract
A pseudo four-leg leveling system for a vehicle, such as a recreational vehicle or the like, includes four jacks in the form of hydraulic cylinders mounted in pairs at the front and rear of the vehicle. A power system supplies hydraulic fluid to extend and retract the jacks thereby adjusting the attitude of the vehicle relative to level. The front two jacks are driven in parallel and the rear jacks are driven separately and independent of the front jacks. When the power system is de-energized the front jacks are hydraulically isolated to improve the stability of the system when static. Pressure operated valves automatically control the isolation of the jacks driven in parallel, as well as return passage to the tank, without the need for additional electronically controlled valves.