A self-cleaning and anti-adhesion apparatus for marine instruments includes an installation frame. A first end of the installation frame is fixed with an installation base, and a second end of the installation frame is movable with a screw rod. The upper end of the installation base is movable with a first rotation base. A wire netting ball used for holding a sensor is installed above the first rotation base. The wire netting ball is fixedly connected with the installation base. The top end of the screw rod is fixedly connected with a first end of the flexible connector, and a second end of the flexible connector is fixedly connected with a floating bladder. The screw rod is screwed with an inner wheel of an internal meshing ratchet mechanism, and an outer wheel of the internal meshing ratchet mechanism is fixed inside the mounting ring.

A modular mechanical arm of an underwater pile foundation structure includes a modular interface disposed at one end of the transmission arm rod, a mechanical arm connecting part disposed at the other end of the transmission arm rod. The mechanical arm connecting part is separately provided with two arm frames, each of the arm frames comprises an inner arm frame and an outer arm frame, the inner arm frame and the outer arm frame are coupled by a joint, and a soft moving and cleaning part is disposed on an inner side of each of the arm frames; the modular interface is coupled with an underwater UAV interface to transmit current and a control signal, a waterproof steering gear is built in the transmission arm rod to receive the control signal.

A pontoon cleaning assembly for cleaning floats on a pontoon boat includes a handle that may be manipulated. A scrubbing unit is movably coupled to the handle. The scrubbing unit may scrub a float on a pontoon boat while the pontoon boat is floating.

The in-water boat-washing system is an automated system for washing a boat while said boat remains in a body of water. The in-water boat-washing system is configured to receive a boat, and propel said boat through a series of brushes that clean the hull of the boat while said boat remains in a body of water. The series of brushes are further defined with a plurality of bottom brushes, a plurality of left side brushes and a plurality of right side brushes. The in-water boat-washing system includes a plurality of rollers that are configured to rotate in order to propel the boat across the series of brushes. The in-water boat-washing system includes a frame that supports all of the componentry required. A control panel is included and automates all of the series of brushes as well as the plurality of rollers.

A sleeved pole-like cleaning device having a pole-like member with a head portion defining a working surface and a removably couplable sleeve with a distal end, a proximal end, a first layer being of a substantially deformably-resilient and polymer-based material, and a second layer coupled to the first layer. The removably couplable sleeve has a first position along a slideable path while the removably couplable sleeve is encapsulating the pole-like member with the distal end of the removably couplable sleeve not substantially adjacent to the head portion of the pole-like member and a second position along the slideable path while the removably couplable sleeve is encapsulating the pole-like member with the distal end of the removably couplable sleeve substantially adjacent to the head portion.

A boat hull washing apparatus includes a left structure and a right structure, one or more brushes arranged to wash a hull of a boat positioned between the structures. The apparatus is provided with a boat positioning assembly that includes a left and a right boat pushing device. The left and right boat pushing devices are attached to left/right structures respectively. The left boat pushing device is arranged to bias a boat, located between the left and right structures, away from the left structure, and the right device functions similar away from the right structure. In this way, the pushing devices are arranged to hold the boat in a lateral position. Using this arrangement of the left and right pushing devices to bias the boat away from the left and right structures, respectively, a single force generating unit is connected to both pushing devices.

A self-cleaning and anti-adhesion apparatus for marine instruments includes an installation frame. A first end of the installation frame is fixed with an installation base, and a second end of the installation frame is movable with a screw rod. The upper end of the installation base is movable with a first rotation base. A wire netting ball used for holding a sensor is installed above the first rotation base. The wire netting ball is fixedly connected with the installation base. The top end of the screw rod is fixedly connected with a first end of the flexible connector, and a second end of the flexible connector is fixedly connected with a floating bladder. The screw rod is screwed with an inner wheel of an internal meshing ratchet mechanism, and an outer wheel of the internal meshing ratchet mechanism is fixed inside the mounting ring.

Exemplary embodiments of the present disclosure directed towards a non-destructive device configured to survey, inspect, and clean marine growth, comprising: manipulators comprising adjustable clamps configured to move or rotate 360 degrees for holding at least one cylindrical shape of an offshore structure; a plurality of hydraulic rams configured to hydraulically operate and control the plurality of manipulators; a central part comprising a camera and light emitting diodes configured to provide visual aid to a user and a lidar configured to determine ranges by targeting the offshore structure with a laser and measure the time for reflected light to return to a programming logic circuit board; probes configured to survey angular and distance measures of objects around the offshore structure, and inspections of safety and security of the offshore; and a high pressure jetting nozzle configured to clean the marine growth and rotary arms of the offshore structure.

The invention relates to an underwater cleaner (1), especially for a swimming pool, comprising a housing (2) in which an especially battery-powered pump having an electric motor (4) and an impeller (3) is arranged, wherein the housing (2) comprises an inlet opening (23) and an outlet opening (22) for a flow path, said flow path forming a first channel section (13) originating from the first inlet opening (23) and a second channel section (14) accommodating the impeller (3), wherein the second channel section (14) is arranged in an inclined manner in relation to the first channel section (13), and wherein the impeller axis (18) is arranged in an inclined manner in relation to a normal (24) to the opening cross-section of the inlet opening (23). The ratio A/B of a first cross-sectional surface A to a second cross-sectional surface B is less than 2.8, wherein the first cross-sectional surface A is defined by the smallest flow cross-section in the first channel section (13) and the second cross-sectional surface B by the smallest flow cross-section of the second channel section (14) directly at the pump inlet. In order to obtain the simplest possible underwater cleaner (1) with the lowest production costs, which offers high suction power with low flow losses even in the case of impellers (3) of relatively large diameters, the first channel section (13) converges continuously into the second channel section (14).

A boat hull washing apparatus includes a left structure and a right structure, one or more brushes arranged to wash a hull of a boat positioned between the structures. The apparatus is provided with a boat positioning assembly that includes a left and a right boat pushing device. The left and right boat pushing devices are attached to left/right structures respectively. The left boat pushing device is arranged to bias a boat, located between the left and right structures, away from the left structure, and the right device functions similar away from the right structure. In this way, the pushing devices are arranged to hold the boat in a lateral position. Using this arrangement of the left and right pushing devices to bias the boat away from the left and right structures, respectively, a single force generating unit is connected to both pushing devices.