Lifting system for lifting goods over a limited distance while m

Details Lifting system for lifting goods over a limited distance while m Lifting system for lifting goods over a limited distance while m

1990-08-07

1992-06-30

Valenza, Joseph E.

Conveyors: power-driven

Conveyor system for moving a specific load as a separate unit

System includes linear conveyor or portion thereof which...

1987741, 1987743, 198809, B65G 4734

Patent

active

051254972

ABSTRACT:
To provide for precise vertical movement without guide elements of a lifting frame, a main shaft (21) has a plurality of cam disks, such as eccenters (26) located thereon, which are coupled to the lifting frame, directly, or by means of double-arm levers. The eccenters may be placed 180.degree. offset from each other on the shaft, with one eccenter follower or cam follower (27) secured to the frame at a first longitudinal position, and other eccenters or cam followers (27) coupled to double-arm levers (33), pivotable about a fixed pivot axis (36) and having the remote ends coupled to the lifting frame (8) at a position remote from the first attachment position. Synchronous movement of the connections to the lifting frame (8) is ensured by using only one drive shaft, so the movement can be, precisely, up and down, while maintaining the frame horizontal.

REFERENCES:
patent: 2497768 (1950-02-01), Hallead
patent: 2856055 (1958-10-01), Mars et al.
patent: 3194380 (1965-07-01), Watson
patent: 3324992 (1967-06-01), Margan
patent: 3462004 (1969-08-01), Hill
patent: 3854576 (1974-12-01), Bowman
patent: 4016969 (1977-04-01), Brand
patent: 4878578 (1989-11-01), Brouwer

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