Material or article handling – Vertically swinging load support – Shovel or fork type
Patent
1990-10-23
1991-09-10
Werner, Frank E.
Material or article handling
Vertically swinging load support
Shovel or fork type
901 1, 901 15, 901 26, 414680, 414714, B66C 100
Patent
active
050469142
ABSTRACT:
A lifting device incorporating first and second arm assemblies with associated rotatable shafts and a platform rotationally connected to the second arm assembly so as to maintain a fixed relationship to a reference surface as the first and second arm assemblies are angularly moved from one position to another. The shaft associated with the first arm assembly is rotated about its axis as the first arm assembly is angularly moved so as to impart similar angular movement to the platform through a rotatable shaft of the second arm assembly; thereby maintaining the platform's fixed relationship to a reference surface. A second embodiment of the lifting device provides an additional device to adjust the angular orientation of the platform with respect to the reference surface, which allows the platform to be maintained in a level orientation when traversing an inclined reference surface.
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Holland John M.
Kennedy Kenneth F.
Cybermation, Inc.
Ellen James
Werner Frank E.
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