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. 31, 1976
Filed:
May. 04, 1973
Applicant:
Inventor:
Harold Walter Huffman, Fairfield, OH (US);
Assignee:
The Hamilton Tool Company, Hamilton, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B65H / ;
U.S. Cl.
CPC ...
242 755 ; 242 7551 ;
Abstract
The rotational speed of the roll supporting shaft of a differential driven rewinder-unwinder is controlled whereby to substantially eliminate the generation of heat by utilizing a variable speed variable torque, regenerative motor-type drive in conjunction with a regenerative, multi-quadrant D.C. control. Current is generated and returned to the power lines during a part of each rewinding or unwinding cycle, thereby conserving energy.
Huffman, Harold. (1976). Differential driven rewinder-unwinder (U.S. Patent No. 3977621). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/3977621
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile