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. 17, 2003
Filed:
Mar. 13, 2001
Demag Cranes & Components GmbH, Wetter, DE;
Abstract
A balancing hoist, includes a housing having a chamber accessible from outside. Received in the housing is a piston which is movable by gas pressure in a longitudinal direction and rotates a threaded spindle which projects into the chamber of the housing and carries a nut that securely fixed to the housing. Mounted in fixed rotative engagement to the spindle and movable longitudinally along the spindle is a cable drum on which a load-carrying cable is wound. At least one pawl is provided and configured for rotation in opposition to an elastic restraining force from a radially inward idle position to a radially outward brake position as a result of centrifugal forces, when a rotation speed of the cable drum exceeds a predetermined level, thereby impacting upon a fixed stopper which projects radially inwardly from the housing and slowing down the rotation of the cable drum until it is at rest.