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:
May. 04, 1993
Filed:
Apr. 29, 1991
Applicant:
Inventors:
Ronald J Sporrer, Ames, IA (US);
Scott D Meyer, Ames, IA (US);
Assignee:
Sauer, Inc., Ames, IA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01B / ;
U.S. Cl.
CPC ...
92 122 ; 91505 ;
Abstract
A swashplate leveling device has a reciprocative leveling follower movable along a fixed axial pin. The cam is biased into engagement with a swashplate of an axial piston variable displacement hydraulic unit to position the swashplate in a zero displacement orientation when there is no control input to the hydraulic unit. The leveling device has a pair of contact points, one positioned on each side of the swashplate tilt axis in a manner that both contact points engage the swashplate when it is leveled to its zero displacement orientation.