Grab bucket for dredging sludge
AssigneeMitsubishi Seiko Kabushiki Kaisha
InventorsHisao Iwata, Gentaro Hasewaga, Kameichi Shimizu
Life of this patent
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Abstract
A grab bucket particularly suitable for dredging the bottom of the sea, rivers, lakes, etc. is provided with bottom plates at the lower portion of a framework from the bottom of which pivotally hang a pair of bucket shells, whereby the bottom plates cooperate with the bucket shells to shield their upper openings when they are swung upwards about their pivotal portions to put their respective confronting edges tightly together in a conventional manner.
Claims5
A grab bucket for dredging sludge comprising frame means including spaced vertical guide members within which block means is in contact with and vertically shiftable between upper and lower locations on said vertical guide members;
- support means attached to each said vertical guide member at said lower location and extending outwardly therefrom;
- a pair of bucket shells each formed by spaced, generally triangularly-shaped side walls connected by a bottom plate member;
- hinge means located at outer extensions of said support means, and link means connected to said block means;
- said triangularly-shaped side walls of each said bucket shell having one corner thereof connected with said hinge means and further having a spaced adjacent corner connected with said link means whereby vertical movement of said block means and connected link means moves said bucket shells between open and closed positions;
- a pair of cover plates, one each mounted on said support means and extending therealong from said vertical guide member attachment to said hinge means location;
- and
- a pair of reinforcement plates, one each extending between and mounted along top portions of said spaced side walls of each said bucket shell, each said reinforcement plate extending outwardly from at least said corners connected with said link means to an intermediate distance, each said reinforcement plate positioned in overlapping relation with each said respective cover plate when said bucket shells are in the closed position.
Dependencies are inferred from the claim text.