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:
Jan. 29, 1985
Filed:
Aug. 19, 1983
Kazuo Maeda, Yokohama, JP;
Kabushiki Kaisha Kito, Kawasaki, JP;
Abstract
A hoist includes a shaft driven by external force, a driving shaft connected to the shaft, a reduction gear train for transmitting rotation of the driving shaft to a load sheave, and a mechanical brake assembly in the reduction gear train. According to the invention in the reduction gear train is arranged an overload safety device comprising a driven gear having a one-way clutch and rotatively driven by the driving shaft and radially inward and outward dual friction plates located between the driven gear and an element of the mechanical brake assembly so as to transmit torque through the radially outward friction plates in winding-up and through both the radially inward and outward friction plates in winding-off. With this arrangement, the electric hoist according to the invention is able to automatically prevent lifting, lowering and dragging a load under overload condition, and enables the once lifted load to be securely lowered irrespective of its light or heavy weight.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile