Fire escape – ladder – or scaffold – Having transpositioning base and erecting means
Patent
1991-02-14
1992-03-17
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Having transpositioning base and erecting means
182222, 108 511, 403330, 24498, 414608, 414785, B60P 100, E04G 124
Patent
active
050960180
ABSTRACT:
A method and apparatus are disclosed for securing a manbasket to the tines of a lifting fork of a forklift. A preferred embodiment comprises a tine clamp mounted to a tine socket on the manbasket. The clamp automatically applies a self-adjusting gripping force to the underside of the tine whenever the fork has elevated the manbasket and automatically releases the tine when the manbasket is resting upright on a reference surface. The tine clamp comprises a lever pivotably mounted at mid-length to the tine socket, at least one gripping cam rotatably mounted to one end of the lever, and a cam release member pivotably mounted to the opposite end of the lever. The lever is biased to keep the gripping edge surface of the cam in contact with the underside of the tine whenever the tine is in the socket and the manbasket is elevated. The cam has an outwardly spiraled profile to enable it to apply a gripping force to the tine that increases as the tine is urged more strongly out of the socket. The cam-release member contacts the reference surface when the manbasket is resting upright thereon, which causes the lever to pivot against the bias and draw the cam away from contact with the underside of tine, allowing the tine to be withdrawn from the socket.
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Renfroe.RTM. Catalog Excerpt (4 pp.).
Miller, C., article published in Wire Rope News & Sling Technology, pp. 31-32 (Jun. 1990).
Lifting Technologies, Inc.
Machado Reinaldo P.
LandOfFree
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