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US 6,578,673 B2Granted
Concrete elevator rail and guidance system
AssigneeOtis Elevator Company
InventorsFrederick H. Barker, Richard E. Peruggi, Gilbert W. Wierschke
Life of this patent
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Abstract
An integrally poured concrete rail guidance system enables the elimination of traditional metal rails by pouring the concrete rail at the same time as the hoistway is poured. Time and expense is avoided in the construction and the concrete rails are durable. A guidance system is also disclosed
Claims6
An elevator system comprising:
- a wall structure defining an elongated hoistway;
- a plurality of guide rails disposed on said wall structure;
- an elevator car disposed within said hoistway and movable longitudinally therewithin;
- a first air cushion, disposed on said elevator car intermediate the car and one guide surface of one of said plurality of guide rails, for positioning said car laterally with respect to said one guide surface;
- a second air cushion disposed on said elevator car intermediate the car and an other guide surface of said one guide rail, wherein said first air cushion is arranged opposite said one surface of said one guide rail and said second air cushion is arranged opposite said other guide surface of said one guide rail;
- and
- wherein the first and second air cushions are each fluidly connected to a common spool valve, said spool valve supplying pressurized air selectively to each of the first and second air cushions.
4 more elements
Dependencies are inferred from the claim text.