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:
Sep. 25, 2001
Filed:
Nov. 29, 1999
Wally L. Kaczmarski, Lisbon, ND (US);
Verne C. Watts, Lisbon, ND (US);
David S. Majkrzak, West Fargo, ND (US);
Patrick M. Cronin, West Fargo, ND (US);
Clark Equipment Company, Woodcliff Lake, NJ (US);
Abstract
A hydraulic circuit for a wood chipper attachment for a skid steer loader provides power to both a motor for driving a chipper wheel and a motor for driving a feed roller. A priority flow valve is provided to supply priority of flow to the chipper motor. As pressure increases on the chipper motor, the output from the skid steer loader pump reduces and the priority flow valve acts to reduce flow to the feed motor to reduce the infeed speed. The wood chipper is adapted to be mounted on a skid steer loader and utilize the hydraulic power source from the loader power source. A separate relief valve for the chipper wheel motor is set to relieve pressure if the chipper wheel motor stalls at a lower pressure than the relief valve for the hydraulic system on the skid steer loader so that the feed motor will have sufficient pressure for reversing the feed wheel.