Joints and connections – Selectively assembled – e.g. – convertible – etc.
Patent
1991-01-07
1992-02-25
Corbin, David H.
Joints and connections
Selectively assembled, e.g., convertible, etc.
114 44, B63C 306
Patent
active
050908421
ABSTRACT:
A lift apparatus has a load member, a lift cradle and a lifting arrangement. The load member has a rail or track portion which provides a path when raising and lowering the lift cradle. The load member also has a mounting portion for mounting the load member to an adjacent structure such as a dock, a pier or a wall. The mounting portion has a web, which stands off mounting hardware, such as a mounting plate, from the rail portion. The lift cradle has bearings for sliding along the rail portion. The bearings have a gap, which allow the bearings to slide along the rail portion without interference from the web. When the bearings are free of the web, the lift cradle can rotate, to deposit the load onto a dock. The lifting arrangement is rotatively coupled to the upper end of the load member, so as to rotate with the lift cradle. A lift system utilizes the lift apparatus and a wheeled cart. The load is located on the cart, which couples to the lift cradle. As the lift cradle is lifted, the cart and the load are also lifted. With the cart arrangement, no transferring of the load between a cart and the lift apparatus is required.
REFERENCES:
patent: 2708346 (1955-05-01), Smith
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patent: 3565271 (1971-02-01), Deck
patent: 4381723 (1983-05-01), Furst
patent: 4432664 (1984-02-01), Baldyga
patent: 4482268 (1984-11-01), Stevenson et al.
patent: 4678366 (1987-07-01), Williamson
patent: 4714375 (1987-12-01), Stevenson
patent: 4750444 (1988-06-01), Lemvig
patent: 4832210 (1989-05-01), Wood
patent: 4976211 (1990-12-01), Reinhardt
patent: 4983067 (1991-01-01), Montgomery
Corbin David H.
Mantooth Geoffrey A.
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