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:
Apr. 14, 1998
Filed:
Mar. 21, 1996
Shizuka Kuryu, Tokyo, JP;
Nihon Biso Co., Ltd., Tokyo, JP;
Abstract
A rope traction device has locking units that include a sheave on which a traction rope is wound. The rope traction device is adapted to be moved along with the traction rope and includes a traction rope inlet for feeding the traction rope to the sheave a traction rope outlet for feeding out the traction rope, a traction rope locking device for locking the traction rope when an increase in the speed of the traction rope is detected, and an auxiliary rope locking device provided in the vicinity of the traction rope inlet for detecting relative moving speed of an auxiliary rope suspended from the rope traction device. An interconnection is provided between the traction rope locking device and the auxiliary rope locking device in order to provide simultaneous engagement of the separate locking devices.