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:
Feb. 02, 1982
Filed:
Sep. 11, 1980
Applicant:
Inventor:
Wayne B Martenas, New Holland, PA (US);
Assignee:
Sperry Corporation, New Holland, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
A01D / ; A01D / ;
U.S. Cl.
CPC ...
56 158 ; 56208 ; 56DI / ; 56DI / ;
Abstract
Most presently known crop harvesting attachment flotation apparatus use a spring to preload the attachment into a floating mode. A problem with this is that, as the attachment is either forced upwardly or intentionally raised, the effectiveness of the spring decreases. This is avoided by a combination of a spring and a fluid operated cylinder acting through pivotal linkage relationships for retaining the attachment in a substantially constant flotation mode during lifting operations and during flotation operations.