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, 2002
Filed:
Oct. 02, 2000
Applicant:
Inventor:
Hubert Erker, Gingen, DE;
Assignee:
Inventio AG, Hergiswil, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B66B 1/34 ; H02H 5/00 ;
U.S. Cl.
CPC ...
B66B 1/34 ; H02H 5/00 ;
Abstract
A definite switching-off of drive equipment for elevators is accomplished with a control at an input side external of a frequency changer power unit that ascertains the presence or the absence of monitoring signals which are derived from the mains voltage at the input of the frequency changer power unit. Upon ascertaining the presence of one or more such signals when the drive is at standstill, the input side control interrupts the energy flow to the frequency changer power unit by generating a switching-off signal to a switching device to disconnect the mains voltage.