Shock absorbing hitch

Elevator – industrial lift truck – or stationary lift for vehicle – Having specific force transmitting connection for... – Equalizes tension in – or length of – plural linking cables

Reexamination Certificate

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Details

C187S411000

Reexamination Certificate

active

08047335

ABSTRACT:
A shock-absorbing hitch termination (40) includes a terminating member (52) that moves against a first bias (62) responsive to a first level of tension on a load bearing member (26) associated with a car (22) and counterweight (24) in an elevator system (20). A support member (60) moves with the terminating members (52) against a second, passive bias (70) responsive to increased tension on the load bearing member (26). In one example, the second bias is provided by mechanical springs (70). In another example the second bias is provided by air springs. In still another example the second bias is provided by pressurized actuators (82). The shock-absorbing hitch termination may be supported for movement with the car, counterweight or both. In another example, the shock-absorbing hitch termination is provided in a stationary structure (90) within the elevator system.

REFERENCES:
patent: 4537286 (1985-08-01), Morris et al.
patent: 5307904 (1994-05-01), Yoo
patent: 5421433 (1995-06-01), Yoo
patent: 5611412 (1997-03-01), Yoo et al.
patent: 5750945 (1998-05-01), Fuller et al.
patent: 6065569 (2000-05-01), Fuller
patent: 6123176 (2000-09-01), O'Donnell et al.
patent: 6216824 (2001-04-01), Fuller et al.
patent: 6223862 (2001-05-01), Barnes
patent: 6234276 (2001-05-01), Wagatsuma et al.
patent: 6315084 (2001-11-01), Shon
patent: 1147474 (1997-04-01), None
patent: 59137431 (1984-09-01), None
patent: 60183483 (1985-09-01), None
patent: 06239570 (1994-08-01), None
PCT International Search Report relating to International Application No. PCT/US03/24542 dated Jan. 27, 2004.
PCT International Preliminary Examination Report relating to International Application No. PCT/US03/24542, dated Oct. 8, 2004.

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