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. 30, 1998
Filed:
Sep. 17, 1996
Applicant:
Inventors:
David Wahlstedt, Minneapolis, MN (US);
Xiangmin Zhou, Minneapolis, MN (US);
Assignee:
Reell Precision Manufacturing Corporation, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E05F / ; E05C / ;
U.S. Cl.
CPC ...
16285 ; 16342 ;
Abstract
The present invention is a spring hinge for generating torque. The spring hinge includes a shaft and a single helical element. The shaft has a surface with an outer diameter and is capable of rotation. The single helical element is wrapped about the shaft. The helical element includes a first end and a second end. The helical element produces a variable torque between the first and second ends.