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:
Nov. 26, 1996
Filed:
Sep. 14, 1995
Robert B Janvrin, Easley, SC (US);
Jeffrey J Karabetsos, Kenosha, WI (US);
John L Bocksnick, Beaver Dam, WI (US);
Danfoss Inc., Rockford, IL (US);
Abstract
A hydraulic valve assembly configured for controlling the elevation and operation of a mowing deck of a power mower. The valve assembly includes a housing having a valve spool positionable in four positions, a cylinder activation position, a neutral position, a cylinder relief and motor start position, and a motor run position. In the cylinder activation position pump pressure is connected to a deck raising cylinder. In the neutral position, a status quo is maintained, and pump is vented to tank. In the cylinder relief and motor start position, the mowing deck, if elevated, is lowered under its own weight by relieving pressure on the deck cylinder, and the mowing motor is started in operation under low pressure. In the motor run position, the motor is connected to high pressure, and the deck cylinder continues to be vented to tank.