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:
Jul. 28, 1998
Filed:
Oct. 03, 1995
Applicant:
Inventors:
Douglas McFarland, Sidney, NE (US);
Donald H Parkes, Lamoni, IA (US);
Assignees:
Shivvers Incorporated, Corydon, IA (US);
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A01D / ; A01D / ;
U.S. Cl.
CPC ...
56 1 / ; 56 104 ; 56DI / ; 56DI / ; 56DI / ; 172-8 ;
Abstract
The present invention provides variable force traction enhance systems for vehicles. The systems include one or more hydraulic cylinders connected to an implement and fluidly connected to one or more hydrostatic transmissions. The hydraulic cylinders actuate the implement in response to changes in the hydraulic fluid pressures in the hydrostatic transmissions. The actuated implement automatically shifts weight to vehicle drive wheels to improve traction and automatically prevents a rear end of the vehicle from bucking.