Elevator – industrial lift truck – or stationary lift for vehicle – Miscellaneous
Reexamination Certificate
1999-05-07
2001-05-22
Olszewski, Robert P. (Department: 3652)
Elevator, industrial lift truck, or stationary lift for vehicle
Miscellaneous
C187S251000, C174S042000, C242S615300, C248S062000, C248S074100, C254S389000
Reexamination Certificate
active
06234277
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a sway reduction device for use with a cable, and more particularly, for use with an elevator compensating cable.
BACKGROUND OF THE INVENTION
Elevator hoistways typically include at least one elevator cable that supports and moves an elevator car and counterweight during operation of the car. The elevator compensating cable can be installed through a sway reduction device designed to dampen oscillations or cable swaying motion as the car and counterweight are moved.
An example of a known dampening device is the Whisper-Flex® Dampening Device (WFDD) made commercially available by Republic Wire & Cable of Rocky Mount, N.C., USA. The WFDD includes a series of wear resistant and flame retardant rollers that are disposed on four sides of the cable. The rollers are rotatably mounted to a metal frame by sealed bearings and brackets. A typical WFDD assembly can consume over 200 cubic inches of space. During installation, four mounting holes each receive a respective mounting bolt for mounting the assembly to a stationary surface, for example, an elevator rail or support beam in an elevator hoistway.
The WFDD successfully performs the sway dampening function but it may have some disadvantages, for example, manufacturing the device can be expensive and installation can be difficult. More particularly, assembly of the WFDD can be a time consuming procedure. In addition, the size and weight of the WFDD assembly can make installation difficult in a crowded elevator hoistway.
OBJECTS OF THE INVENTION
It is an object of the present invention to provide a sway reduction device for receiving a cable, comprising a cable receiving section, the cable receiving section comprising a wall defining an aperture for receiving a cable therethrough; and a mounting section, the mounting section being formed of a flexible, shock absorbing substance and comprising mounting members for mounting the sway reduction device to a surface, when the cable impacts the wall, the mounting section is operative to at least partially absorb the shock of the impact.
It is an object of the present invention to provide a sway reduction device comprising a cable receiving section, the cable receiving section being formed of a shock-absorbing material and comprising a flexure portion and an aperture for receiving a cable therethrough; and a mounting section, the mounting section comprising subsections and at least one mounting member for mounting the sway reduction device to a surface; the subsections being moveable generally toward and away from each other whereby the flexure portion is flexed when the subsections are moved away from each other for installing the sway reduction device around a cable.
It is an object of the present invention to provide an elevator system comprising an elevator car, an elevator compensating cable attached to a support bracket, and a safety support, the elevator compensating cable passing through at least one sway reduction device and is attached to a counterweight and the elevator car, the elevator cable comprising a substantial mass of material, when the elevator cable is moved during operation of the elevator system the cable impacting a wall of the sway reduction device, the sway reduction device comprising a shock absorbent mounting section that is flexible and operative to dampen the impact, at least partially absorbing and dissipating the energy transmitted from impact with the cable.
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Whisper-Flex® Product Literature; Whisper-Flex® Dampening Device for installations traveling over 350 ft/min, 178m/sec, 1985.
Whisper-Flex® Product Literature; Whisper-Flex® Compensating Cable, 1988.
Whisper-Flex® Product Literature; Whisper-Flex® Elevator Compensating Cable Installation Procedures, 1985.
Whisper-Flex® Product Literature; Elevator Cable Cone, 1992.
Alston & Bird LLP
Chin Paul T.
Draka Elevator Products, Inc.
Olszewski Robert P.
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