Handling: hand and hoist-line implements – Hook – hoistline – or grab type – Locking device
Patent
1997-05-27
1999-11-02
Cherry, Johnny D.
Handling: hand and hoist-line implements
Hook, hoistline, or grab type
Locking device
294 864, 294106, 414739, B66C 316
Patent
active
059756047
ABSTRACT:
An attachment device for releasably attaching a grapple to the end of a boom. The device includes a grapple body which mounts main and linkage pins which releasably couple with double pin mounting structures of different sizes and configurations. Hydraulic actuators within the housings on either side of the grapple are operated to open and close the jaws of the grapple under influence of an hydraulic control circuit. Tapered lock bushings are provided to releasably mount the main pins within openings in side walls of the housings. Adapter blocks are provided for mounting the ends of the linkage pins to the housings walls. A fastening arrangement for securing the adapter block enables the linkage pin to be mounted at different separation distances from the main pin to accommodate different types of pin mounting systems that may be encountered on vehicles at different job sites.
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Wolin Robert H.
Wolin William E.
Carnahan L. E.
Cherry Johnny D.
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