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:
Aug. 11, 2009
Filed:
Jan. 03, 2007
Joseph A. St. Aubin, Whapeton, ND (US);
Jeret L. Hoesel, Lisbon, ND (US);
Walter K. Rolf, Lisbon, ND (US);
Joseph A. St. Aubin, Whapeton, ND (US);
Jeret L. Hoesel, Lisbon, ND (US);
Walter K. Rolf, Lisbon, ND (US);
Clark Equipment Company, West Fargo, ND (US);
Abstract
A system and method for substantially simultaneously shifting the speed of a plurality of multiple-speed motors that have shifting valves. The system and method includes substantially simultaneously applying an equal shifting force to all shifting valves, resisting shifting of all shifting valves with an equal biasing force arising from deflection of springs contained in springs chambers, and fluidly communicating all spring chambers with a common receptacle to equalize the pressure in all spring chambers.