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:
Jul. 07, 1992
Filed:
Mar. 28, 1990
Heinz Flaig, Bochum, DE;
Mannesmann Aktiengesellschaft, Dusseldorf, DE;
Abstract
A chain hoist for supporting and selectively raising and lowering a load includes a powered gearwheel that is connected through a frictional lock with one or more friction disks fixed for rotation with the hoist drive shaft so as to provide a slip clutch arrangement. The hoist additionally includes, between one of the friction disks and a pressure spring, a safety brake disk for rapidly halting movement of the load in the event that the rotation of the brake disk attains or exceeds a predetermined speed or rate deemed to be excessive. For this purpose, the brake disk carries a detent pawl that is pivotally displaced by centrifugal force and into engagement with a detent nose or projection defined on the hoist housing when the brake disk rotation exceeds the predetermined speed.