Expansible chamber devices – Resilient means interposed between working member and...
Patent
1973-11-26
1976-06-29
Schwadron, Martin P.
Expansible chamber devices
Resilient means interposed between working member and...
74501R, 92137, 92140, 92153, 187 17, 254 93VA, F16J 110
Patent
active
039658023
ABSTRACT:
A hydraulic drive for operating an elevator and disposed inside the elevator shaft on one side of the load-lifting member of the elevator comprises a hydraulic ram cylinder having two straight cylinder portions connected by a portion forming an arcuate bend. One straight cylinder portion extends up the path of ascent of the load-lifting member of the elevator, whereas the other straight cylinder portion slidably contains a hydraulic ram piston attached to one end of a universally flexible thrust-transmitting strand. The other end of the flexible strand is attached to a cylindrical body arranged to slide up and down said one straight cylinder portion and is provided with a carrier arm projecting to the outside through an axial slot in said one straight cylinder portion for supporting the load-lifting member of the elevator.
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Hershkovitz Abraham
Markva Neil F.
Schwadron Martin P.
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