Elevator – industrial lift truck – or stationary lift for vehicle – Having specific load support drive-means or its control – Includes fluid supporting ram in drive-means
Patent
1999-05-27
2000-07-11
Kramer, Dean J.
Elevator, industrial lift truck, or stationary lift for vehicle
Having specific load support drive-means or its control
Includes fluid supporting ram in drive-means
187274, 187275, 187305, 187373, 187400, B65G 5100
Patent
active
060858737
ABSTRACT:
A pneumatically operated elevator has a pair of elongated vertical tubular cylindrical shafts and horizontally extending cross-over shafts extending between the vertical shafts adjacent their upper and lower ends to provide a substantially closed system. A cab is disposed within one of the vertical shafts, and a fan in at least one of the cross-over shafts moves air between the ends of the shafts to produce a pressure differential above and below the cab to cause the cab to move upwardly and downwardly in the one shaft. At least one vent is provided to admit air into at least one of the shafts to compensate for leakage from the shafts.
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Chin Paul T.
Kramer Dean J.
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