Load elevator with columnar power assemblies

Details Load elevator with columnar power assemblies Load elevator with columnar power assemblies

1994-10-20

1996-05-07

Bucci, David A.

Material or article handling

Self-loading or unloading vehicles

Loading or unloading by other carrier or mover means, and...

187244, B60P 144

Patent

active

055139434

ABSTRACT:
A pair of lift columns telescopically contain a companion pair of tubular runners and a companion pair of fluid powered linear actuators to reciprocate the runners. The actuator circuit includes a flow divider with a pair of idler rotors keyed together for co-rotation in directions induced by the direction of fluid flow. The runners support a load platform with companion linkage systems, each with a flexible member between a rear portion of an outer platform section and an upper end connected to an inside face of the companion runner. Clearance is provided between the inside face of each runner and the companion side of the platform to receive the companion linkage system in a fully recessed condition when the platform is folded into a storage position. Coacting parts on each of the platform sides and the corresponding runner are interengageable and disengageable such that they are mutually engaged when the platform is in a load-bearing position. Each runner is fitted with upper and lower concave rollers having self-centering engagement with a pair of vertically elongate convex guide tracks fitted within the corresponding column.

REFERENCES:
patent: 3887092 (1975-06-01), Leet
patent: 4015686 (1977-04-01), Bushnell, Jr.
patent: 4563121 (1986-01-01), Drews
patent: 4683987 (1987-08-01), Sakata et al.
patent: 4806062 (1989-02-01), Stier
patent: 4940380 (1990-07-01), Ballyns et al.
patent: 5110251 (1992-05-01), Gray
patent: 5176226 (1993-01-01), Martin et al.
patent: 5263808 (1993-11-01), Kert

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