Elevator load bearing member wear and failure detection

Details Elevator load bearing member wear and failure detection Elevator load bearing member wear and failure detection

2004-03-16

2008-08-12

Noori, Max (Department: 2855)

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

Reexamination Certificate

active

07409870

ABSTRACT:
An elevator load bearing member (22) monitoring device (20) has a controller (30) that applies a first signal (40) and a second signal (50) to at least one tension member (24) in the belt. The first signal (40) in one example has a plurality of (42) of a selected amplitude and duration. The second signal (50) includes a series of pulses (52) having a second, shorter duration and lower amplitude. The first signal is useful for providing information regarding a wear condition of the load bearing member. The controller utilizes a response to the second signal to determine a failure condition such as a broken load bearing member.

REFERENCES:
patent: 4266632 (1981-05-01), Yoneda et al.
patent: 4308935 (1982-01-01), Deric
patent: 4427940 (1984-01-01), Hirama et al.
patent: 4650037 (1987-03-01), Husson et al.
patent: 5058710 (1991-10-01), Iwasa
patent: 5392879 (1995-02-01), Boyce et al.
patent: 5402066 (1995-03-01), Hickman, Jr. et al.
patent: 5731528 (1998-03-01), Yamazaki et al.
patent: 5757641 (1998-05-01), Minto
patent: 5881971 (1999-03-01), Hickman
patent: 6073728 (2000-06-01), Olsen et al.
patent: 6163733 (2000-12-01), Rubel
patent: 6633159 (2003-10-01), Robar et al.
patent: 39 34 654 (1991-05-01), None
PCT International Search Report for International Application No. PCT/US04/07899, mailed Aug. 27, 2004.
PCT Written Opinion of the International Searching Authority for International Application No. PCT/US04/07899, mailed Aug. 27, 2004.
PCT International Preliminary Report on Patentability for International Application No. PCT/US04/07899, completed May 24, 2005.

Affiliated with

Also associated with

Rating

Elevator load bearing member wear and failure detection does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Elevator load bearing member wear and failure detection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Elevator load bearing member wear and failure detection will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4002434