A vertical cutter for a machine that can move on wheels includes, a motorized cutter rotatable with respect to its own vertical axis, elements for containing transmission elements which are integral with the cutter, supporting elements for elements for feeding and dispensing wire or cable which can rotate freely about the axis of the cutter. The cutter further includes a roller having a horizontal axis for adjusting a height of the cutter with respect to a walking surface and therefore a depth of a trench generated by it, and for covering the trench with an adjacent soil displaced by the cutter and accumulated in the vicinity of the trench, the wire or cable being accommodated and conveyed by the machine. Also included at the sides of an assembly constituted by containment elements of the transmission elements which are integral with the cutter and by supporting elements for elements for feeding and dispensing a cable, two sliding guides, which rotate freely about the axis of the cutter, for guiding and conveying an additional cable already on the ground.

A system for laying an underwater pipeline on a bed of a body of water has a construction site to form a string of an underwater pipeline, the string being defined by a curved portion shaped substantially like a portion of the bed of the body of water characterized by an abrupt change in slope; at least two vessels to transfer, in the body of water, the string from the construction site to a laying site in the body of water and substantially on the vertical of a path along which to lay the string; and a plurality of floating devices configured to be coupled to the string and so as to selectively support and sink the string in the body of water, and progressively lay the string along the path on the bed of the body of water.

A system for laying an underwater pipeline on a bed of a body of water has a construction site to form a string of an underwater pipeline, the string being defined by a curved portion shaped substantially like a portion of the bed of the body of water characterized by an abrupt change in slope; at least two vessels to transfer, in the body of water, the string from the construction site to a laying site in the body of water and substantially on the vertical of a path along which to lay the string; and a plurality of floating devices configured to be coupled to the string and so as to selectively support and sink the string in the body of water, and progressively lay the string along the path on the bed of the body of water.

This invention discloses a power cable installation device, including a cart frame and an installation frame on the cart frame. An accommodation cavity is disposed at the bottom end face of the installation frame. The accommodation cavity is slidingly connected with a sliding base. Coordinated with the first elastic recovery device and the second elastic recovery device which are interconnected with opposite sides of the accommodation cavity, the sliding base will be more stable when sliding up and down. Meanwhile, with the locking and unlocking between a locking component in the first elastic recovery device and the second guide block, the sliding base will be more stable during the transportation of the cart frame. Thus, automatic control of transmission and driving of digging and drilling work can be achieved.

This invention discloses a power cable installation device, including a cart frame and an installation frame on the cart frame. An accommodation cavity is disposed at the bottom end face of the installation frame. The accommodation cavity is slidingly connected with a sliding base. Coordinated with the first elastic recovery device and the second elastic recovery device which are interconnected with opposite sides of the accommodation cavity, the sliding base will be more stable when sliding up and down. Meanwhile, with the locking and unlocking between a locking component in the first elastic recovery device and the second guide block, the sliding base will be more stable during the transportation of the cart frame. Thus, automatic control of transmission and driving of digging and drilling work can be achieved.

A drainage system (1) for installation in a wet area such as a shower stall. The drainage system (1) comprises an outer drainage conduit (2) adapted to extend within a subfloor (100) of a wet area and an inner drainage conduit (3). The conduit (2) comprises a rim (20) and a pipe body (21). The inner drainage conduit (3) also comprises a rim (30) and a pipe body (31). The rim (30) and pipe body (31) are nestable within the outer drainage conduit (2). When nested, the pipe bodies (21, 31) are adapted to be connectively sealed together using sealant, the rims (20, 30) are adapted to hold a waterproofing membrane (107) between the rims (20, 30,) and to be connectively sealed in a water-tight manner to the waterproofing membrane (107) using sealant or, in the absence of a waterproofing membrane (107), the rims (20, 30) are adapted to be connectively sealed together using sealant in a water-tight manner.

The present invention relates to a device for laying pipes (1) in the ground, the device comprising a ploughshare (2) with a ploughshare shoe (3), wherein the ploughshare shoe (3) has at least one displacement element (5) protruding in a laying direction (4), a drill (6), which drill (6) is connected to the ploughshare (2) and comprises at least one drill head (7) arranged in a drill head housing section (7a) of a drill housing and a conveyor device (8) arranged in a conveyor housing section (8a) of the drill housing for removing drilled material, and a connection device (9) for connecting a pipe (1) to be laid to the drill (6), wherein the ploughshare (2) is arranged behind the drill (6) when viewed in the laying direction (4).

The invention provides a trenching apparatus and a method of using a trenching apparatus. The trenching apparatus (100) may include a main body portion (10), trench cutting equipment (50) depending from the main body portion, at least two ground contacting units (16) arranged on opposed sides of the main body portion and on which the main body portion is supported, each of the ground contacting units being connected to the main body portion by a respective independently operable suspension assembly (20), the respective suspension assemblies being configured to compensate for unevenness of the ground thereby to maintain the trench cutting equipment in a desired angular orientation with respect to the vertical.

The invention provides a trenching apparatus and a method of using a trenching apparatus. The trenching apparatus (100) may include a main body portion (10), trench cutting equipment (50) depending from the main body portion, at least two ground contacting units (16) arranged on opposed sides of the main body portion and on which the main body portion is supported, each of the ground contacting units being connected to the main body portion by a respective independently operable suspension assembly (20), the respective suspension assemblies being configured to compensate for unevenness of the ground thereby to maintain the trench cutting equipment in a desired angular orientation with respect to the vertical.

The present invention relates to a hollow boring auger for use for poles, including a first and second mounting part moveably connected, one to the other, to substantially encircle the pole. A first and second auger part are also included, correspondingly attachable to the first and second mounting part, to substantially encircle the pole, A rotation apparatus associated with the mounting parts and the auger parts is included such that in use the auger parts can be rotated about the pole to bore a hollow trench about the pole. The invention also relates to a method of use.