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. 21, 2005
Filed:
Apr. 30, 2003
Christoph Eiwan, Grafrath, DE;
Christoph Eiwan, Grafrath, DE;
Potain, Ecully, FR;
Abstract
The device enables a switch from the pulley blocks being rigged with one strand to the pulley blocks being rigged with two strands and vice versa. The jib tip has a pulley moveable along its axle between a central position, when the blocks are rigged with one strand, and a lateral position, when the blocks are rigged with two strands. The lifting block, with housing of symmetric shape, comprises a pulley and retractable guide means for the lifting cable. When the blocks are rigged for two strands, the end of the cable is connected to a point of attachment situated on the jib tip, on the opposite side to the lateral position of the pulley. When the blocks are rigged with one strand, the end of the cable is connected to a point of attachment situated on the pulley block. This device for changing the rigging of the blocks applies mainly to luffing cranes.