Material or article handling – Vertically swinging load support
Patent
1983-11-04
1987-09-08
Spar, Robert J.
Material or article handling
Vertically swinging load support
414589, 414734, 901 15, 901 21, 114 65R, 187 871, 254 9R, B66F 900, B66F 906
Patent
active
046920870
ABSTRACT:
The handling apparatus includes two spaced apart lower arms pivoting on a base, and two spaced apart upper arms pivoting on an elbow bearing on the lower arms. The lower arm is driven by a ball-screw arrangement in which a threaded drive, mounted on the base of the apparatus is connected to a ball screw attached to a strut between the ball screw and the lower arm. Moving the ball screw along the threaded drive member pivots the lower arm upward. Another ball screw arrangement is mounted on the lower arm and is attached to the lower end of the upper arm by means of cables that extend along a rear curved surface of the upper arm to allow for more travel of the upper arm. Various attachment can be mounted on the upper arm including hangers for propellers and rudders and a gripper unit for supporting propeller shafts. When handling propellers and rudders, a single material handling unit is used, and the propeller or rudder is hung between the spaced apart arms. When moving long objects such as propeller shafts, two handling units are used together in coordinated movement.
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Ametek Inc.
Harris Michael D.
Smith P. McCoy
Spar Robert J.
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