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. 04, 1985
Filed:
Sep. 04, 1984
Heinz Flaig, Bochum, DE;
Mannesmann Aktiengesellschaft, Dusseldorf, DE;
Abstract
A cam following roller is one arm while a latching member is the other arm of a two-armed lever. The roller rides on the surface of a cam disk. The latch is supported by a spring in a released position relative to the stopping points of the sprocket as long as the predetermined speed limit of lowering a hoist is not exceeded. The sprocket is formed of two segments which are releasably connected with each other by screws. Brake pressure springs are arranged in the shape of a cup-spring package between the screw head and support surfaces of the sprocket segments. When the lowering speed of the hoist is exceeded, the latch is pressed into one of the stopping points of the sprocket, said sprocket arresting, by way of a brake lining, the brake drum and the cable drum connected therewith. In order to lower the load, one of the screws is slowly released and the contact pressure of the segments and of the sprocket with its glued-on brake lining on the brake drum slowly relaxes, such that the frictional resistance of the brake lining is slowly overcome. The heat generated during the braking process leads to an expansion of the brake drum and, thereby, again to increased braking, possibly again up to the point of arrest of the lowering motion. By again slowly releasing the screws holding the sprocket segments together, the load may be easily controlled and safely brought down.