Automatic return mechanism for elevator escape device

Details Automatic return mechanism for elevator escape device Automatic return mechanism for elevator escape device

2006-04-25

2006-04-25

Matecki, Kathy (Department: 3654)

Elevator, industrial lift truck, or stationary lift for vehicle

Having specific load support drive-means or its control

Includes control for power source of drive-means

C187S263000, C187S298000, C187S314000

Reexamination Certificate

active

07032714

ABSTRACT:
Disclosed is a return mechanism for elevator escape device. The return mechanism mounted at a wall of a car and comprises a drive sheave, upper and lower secondary sheaves, a wheel coaxially disposed with the drive sheave and located on an inner wall of the car, a lever including a lower pivot end, a positioning bar, an upper end at the drive sheave, and a groove, a link having one end defined by the groove and a roller at the other end, a support for permitting the link to slide therethrough, a catch, and projecting return members. In a case of car failure, a trapped passenger is able to continuously rotate the wheel for escape in which the mechanism can automatically return to its original position by moving the link backward after the roller contacting the return member.

REFERENCES:
patent: 1232438 (1917-07-01), Spitzfaden
patent: 3212607 (1965-10-01), Smith
patent: 5368131 (1994-11-01), Yoshihiro
patent: 6273216 (2001-08-01), Kocher et al.
patent: 6464043 (2002-10-01), Wang
patent: 6561318 (2003-05-01), Lamb
patent: 6739431 (2004-05-01), Wang
patent: 03133888 (1991-06-01), None

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