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. 28, 1984
Filed:
Feb. 25, 1983
Takayoshi Nakamura, Atsugi, JP;
Kabushiki Kaisha Kito, Kawasaki, JP;
Abstract
A lever hoist comprises a change gear for driving a sheave for winding-up a chain or rope for a load, an operating lever rockably driven by a hand, winding-up and winding-off driving pawls engageable with teeth of the change gear and changeable in response to the purpose of hoisting or lowering the load, and a braking assembly for preventing the change gear from being driven by a gravity of the load and having a spring for releasing the braking assembly. According to the invention, the winding-up and winding-off driving pawls are formed in a unitary member pivotally secured to the operating lever and opposite portions of the pawls of the unitary member are engageable with a holding member urged by a spring, and a distance between a center of the pivot shaft and the portion associated with the winding-off driving pawl is larger than a distance between the center of the pivot shaft and the portion associated with the winding-up driving pawl, so that the winding-off pawl is urged against the teeth with a larger force than that of the winding-up pawl urged against the teeth. With such an arrangement, when a light load is hoisting up, the return movement of the operating lever does not carry along the change gear. When a light load which does not operate the braking assembly is lowering, the large urging force of the winding-off driving pawl prevents the change gear from rotating against the winding-off driving pawl.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile