Excavating – Beneath a body of water – Scoop or bucket
Patent
1998-04-22
2000-03-21
Will, Thomas B.
Excavating
Beneath a body of water
Scoop or bucket
37394, 37396, 37401, 294 6822, 172 265, 414570, 414571, 414575, 414582, E02F 334, E02F 348, E02F 352, B61C 300, B66B 1700
Patent
active
060387955
ABSTRACT:
A dredge having substantially a box-like shape, with an open front face and an open rear face, the rear face having a door hinged thereto and a lock member to hold the door in a locked position. An A-shaped frame member is pivotally secured to the front end of the dredge. Pivotable motion of the A-frame raises the front edge of the dredge over an obstruction. A pulley assembly is secured to the rear top end of the dredge, and a cable from the A-frame is placed over the pulley when the A-frame is to be pivoted to raise the dredge. A door is hinged to the rear side of the dredge. A locking hinge is secured to the rear of the dredge to lock the door in a closed position. The locking hinge includes a pivoting edge, which engages the top edge of the door, and a rectangular bar secured under the locking hinge. The rectangular bar has a width greater than the height so that rotation of the bar produces a pivoting motion of the locking hinge to unlock the door. In operation, the dredge is pulled along a surface by a cable connected to the A-frame, and when an obstacle is encountered by the dredge, the A-frame is pivoted into a vertical position to raise the front end of the dredge. The dredge is then pulled over the obstacle, and the A-frame is pivoted back to the horizontal position to resume dredging.
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Hartmann Gary S.
Will Thomas B.
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