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:
Sep. 14, 2010
Filed:
Dec. 28, 2005
Hiroaki Ito, Tokyo, JP;
Mimpei Morishita, Tokyo, JP;
Hiroaki Ito, Tokyo, JP;
Mimpei Morishita, Tokyo, JP;
Toshiba Elevator Kabushiki Kaisha, Tokyo, JP;
Abstract
An elevator includes guide rails laid in an elevator shaft vertically, an elevator car moving up and down along the guide rails, guiding units provided on the elevator car for guiding it, the guiding unit having a magnet unit including cores and coils forming electromagnets to generate a magnetic force against the guide rail through an air gap and a controller for controlling the magnetic force by maneuvering an exciting current for exciting the electromagnets. The controller controls the magnetic force so as to make the guiding units in non-contact with the guide rails when the elevator car is traveling and brings the guiding units into contact with the guide rails when the elevator car is stopped, so that the guiding units attract and fix the guide rails while the elevator car is stopped.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile