Patent · US Expired

Device for emergency operation of an elevator motor

US5821476A · kind A · utility

9Cited by

6References

6Claims

0Family size

Assignee

Kone Oy · FI

Inventors

Harri Hakala · Hyvinkää, FI
Jorma Mustalahti · Hyvinkää, FI
Esko Aulanko · Kerava, FI

Key dates

Filing date	Mar 20, 1996
Grant date	Oct 13, 1998
Priority date	—
Expiry date	Mar 20, 2016

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB66B5/02
WIPO fieldHandling
WIPO sectorMechanical engineering

Abstract

Device (100) for rotating an elevator motor during an emergency situation, such as a power failure, comprising a d.c. supply (4) and a rotary switch (8) used as a switching device for supplying a d.c. voltage into the windings (R-S, R-T, S-T) of the elevator motor (1). The d.c. voltage (DCC+, DCC-) controlled by the rotary switch is fed by turns into each winding (R-S, R-T, S-T). In addition, the device comprises a switch (6) used to supply a voltage to the brake (3) and to short-circuit the windings.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.