1975-07-21
1976-12-07
Ward, Jr., Robert S.
214 1BC, 214 1BD, 214DIG10, B66C 122
Patent
active
039957560
ABSTRACT:
A load handling apparatus including a frame, an apparatus head mounted on the frame and rotatable in a horizontal plane and an arm mounted on the apparatus head. The arm has an inner portion which is in the form of a parallelogram linkage with two parallel longitudinal links which are swingable in a vertical plane relative to the apparatus head and are connected by joints, at their ends, to an outer transverse link and an inner transverse link parallel thereto. The arm also has an outer portion which is an extension of the transverse outer link of the inner portion and supports, at its outer extremity, a holder for a load. The joint between the inner transverse link and a first of the longitudinal links is adjustable in a vertical direction by shifting relative to the apparatus head. The second of the longitudinal links has a follower which is spaced from the joint associated with the inner transverse link, is guided to follow a horizontal path once the arm is swung and is located on a straight line through the outer extremity of the outer portion and the adjustable joint.
REFERENCES:
patent: 2948417 (1960-08-01), Haanes
patent: 3040685 (1962-06-01), Ridley
patent: 3061118 (1962-10-01), Halberstadt
patent: 3127026 (1964-03-01), Blatt
patent: 3268092 (1966-08-01), Hainer et al.
patent: 3703968 (1972-11-01), Uhrich et al.
Foralkranar AB
Ward, Jr. Robert S.
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