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:
Jun. 04, 2002
Filed:
Feb. 15, 1999
Roger Mickelson, West Burlington, IA (US);
Matthew J. Hennemann, Burlington, IA (US);
David Swaim, Joliet, IL (US);
Case Corp., Racine, WI (US);
Abstract
A variable metering fluid control valve comprising a valve body having at least one work port and one exhaust port with the ports in fluid communication with a spool bore and an exhaust core, said exhaust core having an exhaust core land and a reciprocating valve spool in the spool bore to control communication of fluid between the work port and the exhaust core, with said valve spool having a land portion with a plurality of variable length metering notches, wherein the land portion of the valve spool remains in contact with the exhaust core land through the full stroke of the valve spool. The variable length metering notches may be varied in width, depth, and cross-section so that precise control of the fluid system is achieved.