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. 08, 1982
Filed:
Aug. 04, 1980
Applicant:
Inventors:
Guy J Swanson, Spokane, WA (US);
Morton C Swanson, Palouse, WA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A01C / ;
U.S. Cl.
CPC ...
172464 ; 172483 ; 172675 ; 172671 ; 111 85 ;
Abstract
Individual tool bars are mounted between upright guides of a horizontal rectangular frame. Rollers engaging the guides transmit longitudinal forces from the frame to the tool bars and allow the tool bars to move freely up and down. Ground working tools mounted to the bars can therefore 'walk' over uneven terrain as controlled by balancing depth wheels and packer wheels. Hydraulic cylinders are mounted between the tool bars and frame for applying upward or downward force against the tool bars without inhibiting their free movement along the guides in response to ground contour.