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. 11, 1996
Filed:
Feb. 23, 1995
Reinhard Weber, Jever, DE;
Fried. Krupp AG Hoesch-Krupp, Essen, DE;
Abstract
A lifting apparatus mountable on a rotatable platform for transferring counterweights. The lifting apparatus includes a lifting element having an upper, stationary cage, and a lower cage rotatable relative to the upper cage, each being composed of a tube having a rectangular cross-section. A ball bearing slewing gear connects the lower cage to the upper cage, and has an upper part forming a base plate of the upper cage rigidly connectable to the rotatable platform. A vertically-extendable double-acting counterweight-lifting cylinder is positioned within the upper and the lower cages. A rectangular bar guide is secured to an upper end of the counterweight-lifting cylinder, and is slidingly guided within the upper and the lower cages. A cross-pin is fastened to a lower end of the counterweight-lifting cylinder and projects through an outer surface of the counterweight-lifting cylinder perpendicular from a longitudinal axis of the counter-weight lifting cylinder to form a form-fitting connection with a respective one of the counterweights when the lower cage is rotated. Also provided is an operating cylinder having a displaceable piston rod having a displaceable end. The operating cylinder has opposite ends, one of which is constituted by the displaceable end of the piston rod. One end of the operating cylinder rod is securable to the rotatable platform. The other end of the operating cylinder is hinged to the lower cage so that an extension of the piston rod causes the rotation of the lower, rotatable cage.