Inventors:
David L. Pischke - Dousman WI
Assignee:
Harnischfeger Corporation - Brookfield WI
International Classification:
B66C 138
Abstract:
Disclosed is a crane for moving an object such as a water dam gate having an attachment device, e. g. , a hook, to be engaged by a hookup link. The link is mounted on the crane lifting block for link movement between a first position for engaging the gate hook and a second position for releasing the hook. Aspects of the invention involve a first apparatus for detecting when the link is within a predetermined location near the hook and a second apparatus for determining whether the link is in the first position or the second position. Other aspects of the invention involve a unique cable reel and link line arrangement whereby the hookup link is engaged or disengaged from the hook. A method for moving an object, e. g. , a gate of a dam, is also disclosed.