Handling: hand and hoist-line implements – Spacing hoist bar or frame – Load gripping units
Patent
1976-10-06
1978-01-24
Cherry, Johnny D.
Handling: hand and hoist-line implements
Spacing hoist bar or frame
Load gripping units
294 83R, 294 86R, 294110R, B66C 110
Patent
active
040700534
ABSTRACT:
A suspension apparatus comprises a pair of movable shackles, and a control unit for automatically engaging or disengaging the movable shackles with or from a hook of a crane as the latter moves first downward and then upward. Each of the movable shackles is pivotally mounted on a beam assembly so as to be rotatable between a reset position in which it is open and a set position in which it is closed with respect to the other movable shackle. The control unit for automatic engagement and disengagement comprises drive apparatus which is supported on the beam assembly between a pair of movable shackles so as to be movable in a vertical direction, the drive apparatus being controlled by an upward and downward movement of the crane hook, connection apparatus for operatively connecting the drive apparatus with the pair of movable shackles, a spring for urging the drive apparatus to its inoperative position for normally maintaining the pair of movable shackles in their reset position, and locking apparatus responsive to an initial downward movement of the crane hook for locking the drive apparatus as it moves the pair of movable shackles to their set position against the resilience of the spring and responsive to a next downward movement of the hook for releasing the drive apparatus.
REFERENCES:
patent: 3072430 (1963-01-01), Fahrenwald
Kutsuzawa Shunsuke
Tsujii Takehiko
Cherry Johnny D.
Kabushiki Kaisha Nippon Kijuki Seisakusho
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