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:
Jul. 23, 1991
Filed:
Feb. 26, 1990
Keiichiro Nakai, Tokyo, JP;
Manabu Suganuma, Narita, JP;
Otis Elevator Company, Farmington, CT (US);
Abstract
A linear motor driven elevator system comprises: a car connected to a counterweight by a rope; a linear motor comprised of a primary conductor and secondary conductor, one of which is a moving element and the other being a stator, the moving element being mounted in the car or the counterweight; and a device for stopping the car comprising, a power source connected to the primary conductor, the power source being continuously fed to the primary conductor to move the car and not being fed to the primary conductor to stop the car, and a braking device mounted on the car, the braking device being disengaged when power is fed to the primary conductor and engaged when power to the primary conductor is interrupted.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile