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. 17, 1982
Filed:
Dec. 15, 1980
Steven A Reich, Waterloo, IA (US);
Deere & Company, Moline, IL (US);
Abstract
A thermal actuator includes a housing containing a stack of deformable discs. A spring maintains a movable follower in engagement with the disc at the end of the stack. At least some of the discs are active snap-acting thermostatic bimetallic discs with first and second structural states wherein those discs are concave in first and second directions at different temperatures. The stack includes a first kind of bimetallic disc which snaps between its structural states at lower transition temperature and a second kind bimetallic disc which snaps between its structural states at a higher transition temperature. The first and second kinds of discs are alternately arranged in the stack. In one embodiment, passive discs which remain in a single structural state are disposed between adjacent pairs of the active discs.