US 6,981,575 B2 | ||
Concrete rail safety device for an elevator car | ||
Frederick H. Barker, Bristol, Conn. (US); and Richard E. Peruggi, Glastonbury, Conn. (US) | ||
Assigned to Otis Elevator Company, Farmington, Conn. (US) | ||
Filed on Sep. 27, 1999, as Appl. No. 9/406,445. | ||
Prior Publication US 2001/0047910 A1, Dec. 06, 2001 | ||
Int. Cl. B66B 5/22 (2006.01) |
U.S. Cl. 187—372 | 20 Claims |
1. A guide rail safety device, for an elevator car riding on a non-metallic guide rail formed of concrete, the guide rail
safety device comprising:
a housing;
a wedge disposed in the housing, the wedge having a friction surface aligned for contact with the non-metallic guide rail;
at least one horizontal locator disposed in the housing, for engaging the wedge and urging the friction surface into contact
with the non-metallic guide rail so that the friction surface is wedged against the non-metallic guide rail by motion of the
elevator car along the non-metallic guide rail; and
an actuator for triggering urging of the friction surface by the horizontal locator,
wherein the friction surface is sized and the wedge is shaped so that, when urged by the horizontal locator into contact with
the non-metallic guide rail, the friction surface is wedged against the non-metallic guide rail with a pressure of not more
than approximately 50 psi on the non-metallic guide rail, arresting the motion of the elevator car.
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