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. 10, 1997
Filed:
May. 11, 1995
Wolfgang Muller, Meggen, CH;
Christoph Liebetrau, Menziken, CH;
Utz Richter, Ebikon, CH;
Jurgen Kastle, Udligenswil, CH;
Albrecht Morlok, Horb, DE;
Helmut Heizmann, Stuttgart, DE;
Inventio AG, Hergiswil, CH;
Abstract
A friction wheel drive apparatus for a self-propelled elevator car movable in an elevator shaft can be mounted on the top side or bottom side of the car. The drive apparatus is connected with a counterweight by a force transmission device for balancing the car weight and a portion of the conveyed load. The force transmission device is fastened to and guided at the drive apparatus such that a force generated by the counterweight, the weight of the car and the weight of the conveyed load is applied as a contact pressure to urge a friction wheel of the drive apparatus against a travel track surface.