Electricity: motive power systems – Automatic and/or with time-delay means – Movement – position – or limit-of-travel
Patent
1995-02-07
1996-09-24
Ro, Bentsu
Electricity: motive power systems
Automatic and/or with time-delay means
Movement, position, or limit-of-travel
52 10, 52118, 297 162, 297232, 297331, E04H 312
Patent
active
055594115
ABSTRACT:
A power system is provided for extending and retracting telescopic seating. The power system includes a frame, a drum operably mounted on the frame for rotational and translational movement, and an extendable chain having a first end operably attached to the telescopic seating and a second end operably attached to the drum. A power mechanism is configured to rotate the drum to wrap the extendable chain onto the drum and further is configured to raise the drum as the extendable chain is wound onto the .drum and takes up space thereon. Still further, the power mechanism is configured to lower the drum as the extendable chain is unwound from the drum and takes up less space thereon. The extendable chain includes interconnected links with wheels that mateably nest adjacent each other in alternating positions as the chain is wound onto the drum.
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"Folding Bleacher Co." product brochure. Folding Bleacher Co., a subsidiary of Irwin Seating Co., publisher. Published prior to Feb. 7, 1994.
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Irwin Seating Company
Ro Bentsu
LandOfFree
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