The problem of penetrating through nets and other objects is solved by cutting the object using concentric cutters in which a rotatable cutter having floating teeth rotates concentrically about a stationary cutter having fixed teeth. The object is cut by a severing action caused by the floating teeth of the rotatable cutter sliding against the fixed teeth of the stationary cutter. Embodiments of the invention include a UUV system for penetrating through fishing nets and other objects, concentric cutting assemblies for use in the UUV system and other systems, and a method for penetrating through fishing nets and other objects. A UUV system in accordance with an embodiment of the invention has a concentric cutting assembly at the forward end and a propulsor at the aft end. The concentric cutting assembly integrates seamlessly within the UUV housing and is deployed from the forward end of the UUV, enabling the UUV to quickly and efficiently penetrate through objects blocking its path.

A system, a method and a modular apparatus may use a wire loop to cut an object. The apparatus may have a wire loop connected to pulleys on a deck attached to a frame. The deck may move relative to the frame to direct the wire loop through the object. The apparatus may have arms that may hold the object being cut. The apparatus may be configured with different cutting decks to reduce the overall size of the apparatus and/or to facilitate cutting a particular object in a particular environment.

A diamond wire saw and method provides a frame that includes a clamp that attaches to a target (e.g. piling, beam, tubular), an elongated toothed rack extending away from the mount and target, and a moving portion that carries the diamond wire and motor drives that advance the moving portion toward the target and along the toothed rack while driving the wire around roller guides.

A reciprocating cutter system for use in spaces where a typical saw is unable to operate due to size, space, and operability limitations is disclosed. In at least one embodiment a reciprocating cutter system includes: a housing; a handle disposed on a top portion of the housing to provide an operator a user grip to operate the system; a cable saw coupled to the housing of reciprocating cutter system; a spring disposed within the housing and coupled to the cable saw such that as the cable saw is moved in a back-and-forth motion when in use, the spring also moves in a back-and forth-motion without the operator-held handle needing to move; and a connectivity bit, coupled to the cable saw, to connect the wire saw through the connectivity bit to a reciprocating device, the reciprocating device to provide the back-and-forth motion to the connectivity bit and the cable saw.

An object of the invention is achieved by a method for cutting an elongated shell-type object. The method may include steps of providing a gantry defining a portal and comprising a wire grid operable in the portal; operating the wire grid, whilst moving the shell-type object through the wire grid along a lateral-axis (Z) substantially perpendicular to the portal. The method is performed by a stationary gantry, where the shell-type object is moved through the portal. Thereby, the method is simplified as there is no need for a rail system for moving the gantry.

An underwater cutting device for shipwreck salvage, comprising a lower support plate, an upper support plate, columnar support rods, and a reinforcing plate, and a plurality of columnar support rods and a reinforcing plate are provided between the lower support plate and the upper support plate, wherein it further comprises holding components, a moving component, and a rope saw component; two holding components are provided between the lower support plate and the upper support plate, and the two holding components are symmetrically arranged; a top of the upper support plate is provided with a moving component, and the moving component is provided with a rope saw component. When in use, place the pipe on the inner side of the right end of the lower support plate and the upper support plate, then operate the two holding components to hold the pipe.

The present invention relates to a reciprocating wire saw device. The device is primarily comprised of a body with at least one handle, at least one trigger, at least one battery, and a second end with at least one blade and at least one plunger. The device preferably has two oscillating arms that oscillate independently via the motor. Therefore, each end of a wire blade can be attached to each arm such that oscillation of the arms allow the blade to cut a pipe or other similar object.

A rotatable multi-tool power saw apparatus may comprise a rotatable cutting head with a base plate. A rotating plate assembly may be rotatably mounted to the base plate and may be configured to position a cutting blade or other tools at multiple angular orientations. Left and right extension arms may extend from the base plate. A cutting blade may receive motive force from a motorized tool and rotate about the cutting head to contact a workpiece. A tool clamp mechanism may mount to the rotatable cutting head and may include a hinged clamp to secure the cutting head to the motorized tool. One or more handles may mount to the apparatus for user control.

A cutting apparatus (1) configured for The cutting apparatus (1) has a cutting means drive arrangement (100) having at least one cutting means (12) and at least one motive means (43) for providing power to the cutting means (12). The cutting apparatus (1) is configured such that all, some or a part of the cutting means drive arrangement (100) is interchangeable, on site. This enables use of a single cutting apparatus to perform a variety of different cuts and/or to cut a variety of different objects.