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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.:

US 5036955 B1

PDFFull Text
Date of Patent:
Aug. 06, 1991

Filed:

Feb. 26, 1990

Column vibration system for a linear motor driven elevator

Applicant:
Inventors:

Keiichiro Nakai, Tokyo, JP;

Manabu Suganuma, Narita, JP;

Assignee:

Otis Elevator Company, , US;

Attorney:

Doigan; Lloyd D.

Primary Examiner:

A D Pellinen

Assistant Examiner:

W E Duncanson, Jr

Int. Cl.
CPC ...
B66B / ;
U.S. Cl.
CPC ...
187107 ;
Abstract

A column vibration detection system for a linear motor driven elevator system comprises a vibration sensor installed on a column portion of a linear motor for detecting vibrations caused by seismic activity in the column portion propagated through the column portion, a first means for comparing an output signal derived from the vibration sensor with an earthquake occurrence determination signal, and a second means for controlling the linear motor of the elevator system on a basis of the occurrence or output of the first means.

Find Patent Forward Citations

Nakai, Keiichiro. (1991). Column vibration system for a linear motor driven elevator (U.S. Patent No. 5036955). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5036955

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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