A clamshell bucket assembly including first and second pivotally connected steel bucket halves rotating between open and closed positions and including sediment retention bars secured between the overlapping sides define a scoop for permitting outflow of water while retaining a volume of a dredged material. Weld rivets provide reinforced securing of the side and bottom steel portions of each bucket half and extend a thickness of the bucket halves to prevent fracturing at the welded interface. Upper and lower sheave assemblies provide increased durability and wear resistance during repetitive opening and closing of the mechanical bucket halves. The sheaves each include a central pin supporting hub collar formed from a plurality of progressively inwardly stepped and stacked disc shaped plates, these being initially sectioned from a hardened steel sheet and welded to form the hub at the highest zone or area of stress exerted upon the sheave during operation of the bucket.

A clamshell bucket assembly including first and second pivotally connected steel bucket halves rotating between open and closed positions and including sediment retention bars secured between the overlapping sides define a scoop for permitting outflow of water while retaining a volume of a dredged material. Weld rivets provide reinforced securing of the side and bottom steel portions of each bucket half and extend a thickness of the bucket halves to prevent fracturing at the welded interface. Upper and lower sheave assemblies provide increased durability and wear resistance during repetitive opening and closing of the mechanical bucket halves. The sheaves each include a central pin supporting hub collar formed from a plurality of progressively inwardly stepped and stacked disc shaped plates, these being initially sectioned from a hardened steel sheet and welded to form the hub at the highest zone or area of stress exerted upon the sheave during operation of the bucket.

A slurry wall grab has a hybrid drive in turn having at least one pulley block, at least one hydraulic actuator, and at least one energy store. The hydraulic actuator and the pulley block open and/or close a grab jaw of the slurry wall grab. The energy store can be charged by actuating the pulley block.

A slurry wall grab has a hybrid drive in turn having at least one pulley block, at least one hydraulic actuator, and at least one energy store. The hydraulic actuator and the pulley block open and/or close a grab jaw of the slurry wall grab. The energy store can be charged by actuating the pulley block.

A power bucket having a first and second bucket half pivotally secured together about a main axis by a pivot pin. The bucket halves are movable between an open and a closed position. A head is disposed above the bucket halves and at least one arm pivotally connects the head to one bucket half while at least one second arm is pivotally connected between the head and the other bucket half. A cylinder support is pivotally mounted to the pivot pin and one end of a hydraulic cylinder is attached to the pivot support. The other end of the cylinder is attached to the bucket. Upon actuation of the cylinders, the cylinders move the bucket halves so that a cutting edge of the bucket half moves in a substantially horizontal plane.

Disclosed is a sample collection apparatus. The sample collection apparatus relates to a sample collection apparatus configured to be capable of stably collecting sediment from a seabed without disturbing the same and to be capable of easily separating and transporting a box itself containing a sample from the sample collection apparatus. Briefly, the sample collection apparatus includes a frame section, a vertical operation section, and a rotary operation section.

The invention relates to a slurry wall grab having a hybrid drive comprising at least one pulley block, at least one hydraulic actuator, and at least one energy store, wherein the hydraulic actuator and the pulley block are configured to open and/or close a grab jaw of the slurry wall grab, and wherein the energy store can be charged by actuating the pulley block.

The invention relates to a slurry wall grab having a hybrid drive comprising at least one pulley block, at least one hydraulic actuator, and at least one energy store, wherein the hydraulic actuator and the pulley block are configured to open and/or close a grab jaw of the slurry wall grab, and wherein the energy store can be charged by actuating the pulley block.

A grasping apparatus for transporting one or more rolling racks. A transfer device can be used in connection with the grasping device. The grasping apparatus can include a collection area and controls. The collection area preferably extends from the transport device in a direction away from the user of the transport device. The controls are preferably located in an area accessible by a user of the transport device when using the transport device to transfer rolling racks. The collection area can include one or more extensions or armatures designed to grasp a portion of the rolling rack and secure that portion of the rolling rack for transport of that rolling rack as dictated by movement of the transfer device by the user. The controls of the grasping apparatus allow a user to removeably engage the collection area.

A power bucket having a first and second bucket half pivotally secured together about a main axis by a pivot pin. The bucket halves are movable between an open and a closed position. A head is disposed above the bucket halves and at least one arm pivotally connects the head to one bucket half while at least one second arm is pivotally connected between the head and the other bucket half. A cylinder support is pivotally mounted to the pivot pin and one end of a hydraulic cylinder is attached to the pivot support. The other end of the cylinder is attached to the bucket. Upon actuation of the cylinders, the cylinders move the bucket halves so that a cutting edge of the bucket half moves in a substantially horizontal plane.