2133 results about "Stern" patented technology

A projectile comprised of an ogive section, a bearing surface section and a boattail section. A cavity is formed inside the projectile from an aperture on the aft end of the boattail section and forward to about the transition point (shoulder) between the ogive section and bearing surface section. The cavity is centered about the centerline of the projectile and open on the aft end of the projectile.

A boat with a controllable wake, including a boat hull with a propulsion system. A wake controlling device includes first and second plates with a bottom surface which is convexly curved between their forward and rear ends, and first and second mounts secured to the port and starboard sides, respectively, of the boat transom and securing the forward ends of the plates for pivoting about axes which are behind the boat transom and generally lie parallel to the plane of the aft boat bottom adjacent the first and second mounts. Plate controls extend between the transom and the plates to adjustably pivot the plates relative to the mounts. A plurality of generally triangular fins extend from the plates at substantially right angles to the plate bottom surfaces and extend at substantially right angles from the axes. Side plates are on the lateral edges of the first and second plates.

A power-generating device located in or on the surface of the ocean for generating power utilizing the energy in ocean wave motion. The device is moored to the bow and stern at ˜45° to incoming ocean waves, and with a yawing capability to adjust to change in wave direction. The device delivers power to a shore grid via a submarine cable from a generator. A rotational driving torque to the generator is produced by two long counter-rotating drive tubes, which are held by bearings in the bow hull and the stern hull of the device. As an alternative, hydraulics may be employed for energy capture and power smoothing and used to provide the rotational torque through a hydraulic motor to drive a generator. The main body is partially submerged and has multiple pod floats connected to the structure by rocker arms with bearings through which the drive tubes pass or double-acting hydraulic rams between the arms and the main body, which capture energy through pod displacement and store it in accumulators. Rotary torque of the drive tubes is produced when the pods move up and down according to motion of the waves and is transmitted to the generator to generate power. In the hydraulic case, energy is stored in accumulators as pressure due to the double-acting hydraulic pistons pumping when the pods move up and down according to the motion of the waves. Hydraulic pressure drives a pump, which provides torque to the generator.

An adjustable surf wake system enhances a wake formed by a watercraft travelling through water. The system may include a flap for deflecting water traveling past the stern of the watercraft, and/or a positioner operably connected to the flap for positioning the flap relative to a longitudinal axis of the watercraft between a neutral position and an outward position. Positioning a port flap in its extended position enhances a starboard surf wake, and positioning the starboard flap in its extended position enhances a port surf wake.

A water craft having a bow and a stern including an engine of sufficient thrust to create an enlarged wake at the stern of the boat as the boat moves along the surface of a body of water.

The water tight compartment is positioned to carry water below the water line and essentially astride the centerline or keel of the boat. The compartment is adapted to contain liquid water in an amount sufficient to enhance or equalize the size of the boat wake.

The compartment extends from a point forward of the transom and engine, and extends to a point forward of the midpoint between the bow and the stern, and terminates short of the bow while serving to exert downward force on the bow against the water when the water craft is underway and the compartment carries water.

A hydrofoil unit for attaching to the stern of the hull of a boat. The unit includes a mount that mounts to the stern of the hull of the boat, a hydrofoil that is pivotally attached to the mount, a pivot assembly that pivotally attaches the hydrofoil to the mount, and apparatus for pivoting the hydrofoil relative to the mount. In one embodiment, the apparatus is automatic and includes an hydraulic cylinder that is pivotally attached to the transom of the boat and a strut that is pivotally attached to the hydraulic cylinder and the hydrofoil. In another embodiment, the apparatus is manual and includes an upper threaded rod that is pivotally attaching to the transom of the boat, a turnbuckle that is attached to the upper threaded rod, and a lower threaded rod that is attached to the turnbuckle and the hydrofoil.

A trash skimmer work boat collects and discharges debris from the front or bow. A storage conveyor positioned approximately amidships and along the center line, and is mounted to the hull on a slide or track arrangement that permits fore and aft motion. A collection and discharge conveyor is mounted at the bow portion of the hull. The forward conveyor can be oriented in a trash collection position or in a trash discharge position. The storage conveyor is brought sternward so that there is clearance for the proximal end of the forward conveyor to be raised or lowered, and then is brought back forward so that the storage conveyor is in position to receive debris or to discharge it. Auxiliary floats at the sides of the boat hull provide additional buoyant support for the front conveyor, and are detachable so they can be removed for road transport of the boat.

A bullet includes at least a mid core and a rear core in tandem alignment. The hardness of the mid core is greater than the hardness of the rear core. A jacket envelops both the mid core and the rear core. The jacket has a generally cylindrical sidewall, which is in contact with the mid core, and a boat-tail, which is in contact with the rear core. The rear core is substantially contained within the boat-tail. The mid core and the rear core may be substantially lead-free. In one embodiment, the bullet includes a front core in tandem alignment with the rear core and in contact with a nose portion of the jacket. In another embodiment, the mid core extends from the nose portion of the bullet to the boat-tail.

An adjustable surf wake system enhances a wake formed by a watercraft travelling through water. The system may include a flap for deflecting water traveling past the stern of the watercraft, and/or a positioner operably connected to the flap for positioning the flap relative to a longitudinal axis of the watercraft between a neutral position and an outward position. Positioning a port flap in its extended position enhances a starboard surf wake, and positioning the starboard flap in its extended position enhances a port surf wake.

The invention provides an underwater robot adjusted through three oil pockets, and a depth-setting control method thereof. The method comprises the following steps: information, such as depth, longitudinal velocity and attitude angle, etc., is obtained through corresponding sensors; the static submergence or dynamic submergence is determined according to a host computer instruction; if the instruction indicates the static submergence, a bow, a midship and a stern respectively pump oil from the oil pockets at the same time, therefore, the displacement volumes of the oil pockets are reduced, the buoyancy force of the underwater robot is smaller than the gravity force in general, and the underwater robot sinks; if the instruction indicates the dynamic submergence, an axial main thruster is started, and enters a constant speed motion state with acceleration, an oil storage tank at the bow part sucks oil from the bow oil pocket, and therefore, the displacement volumes of the bow oil pocket is reduced; since the oil is discharged to the stern oil pocket from an oil storage tank at the stern part, the displacement volume of the bow oil pocket is increased; the underwater robot is changed into a state of trim by head from zero pitch, and bow trim occurs; the bow trim motion is coupled by the axial motion at the moment, and longitudinal trim submergence is realized; and the oil suction action and the oil discharge action are opposite when the static floating or dynamic floating occurs. The method has significance for the long-distance voyage underwater robot regarding to energy conservation.

One or more docking cages releasably attached to a tow line extending from the stern of a retrieval ship, emit tracking beacon beams picked up by sensors in unmanned underwater sea craft vehicles being approached, for steered propulsion thereof into rammed hook attachment to the cages. A sea craft vehicle thereby releasably attached to a cage, is towed onboard the retrieval ship by storage reel-in of the tow line, which is then disconnected from the cage and the retrieved vehicle for subsequent use in retrieval of other unmanned sea craft vehicles.

A telescopic ladder apparatus can be deployed from a closed receptacle on the stern portion of a boat. The ladder is formed with telescopic side rails supporting transverse treads that can collapse into a stored position in which the treads are placed adjacent one another. The side rails are mounted to a slide mechanism that is mounted in the receptacle for sliding movement relative to the boat. The slide mechanism supports the side rails for a linear sliding movement to permit the deployment of the ladder externally of the receptacle to be telescopically extended toward the water. The side rails are pivotable downwardly to position the ladder into a generally vertical deployed position from the generally horizontal stored position. The receptacle housing the telescopic ladder and slide mechanism is opened for access to the ladder through a generally vertically oriented door that provides a clean aesthetic appearance for the boat.

The invention provides a water plant reaping and harvesting ship which comprises a hull, a water plant cutting device, a water plant conveying device, a water plant collecting device, auxiliary collecting devices and a power device. The water plant conveying device is arranged on an installing frame of the bow in an inclined mode, the lowest end of the water plant conveying device is connected with the water plant cutting device, and the water plant collecting device is arranged at one side of the highest end. The water plant cutting device comprises a bevel gear drive mechanism, a slider-crank mechanism and a cutter reciprocating mechanism. The water plant conveying device comprises a chain plate, a chain wheel, a chain, and a water plant leakage preventing mechanism arranged on the chain plate. The water plant collecting device comprises a collecting hopper, a collecting box, a guide rail, and a collecting platform arranged on the stern. The auxiliary collecting devices are profiling variable wing eccentric collecting wheels or collecting plates arranged on the bow. The water plant reaping and harvesting ship integrates water plant cutting, conveying and collecting, all the devices are convenient to combine, and easy to disassemble, replace and maintain, connection in the whole harvesting process is close, the mechanical degree is high, and the reaping efficiency is far higher than that of manual salvage.

An overhead storage system for a boat bimini top comprising an elongated unitized backing material. The backing material has a front end, a rear end, a left and right side, a top surface, and bottom surface. Attached to the bottom surface of the backing material is a series of storage pockets. The storage pockets are of varying sizes and are generally rectangular in shape and have a hinged lid. Along the bottom left and right side of the backing material is an edge channel housing a telescoping pole. The telescoping poles provide support and structure to the backing material and storage pockets. At the bow end of each telescoping pole is a V-shaped bend, which generally conforms to the contour of a bimini shade cover. Mounted perpendicular to the telescoping poles and below the backing material, are several spreader bars. On the top side of the backing material are a series of support battens and batten sleeves which keep the backing material from sagging. The backing material, storage pockets, and telescoping pole assembly is removably attached to the front end of a bimini shade cover frame by a bow hook and to the rear of a bimini frame by a stern hook assembly. The invention provides convenient, removable, overhead storage without any modifications or alteration to the boat bimini shade cover.

A solar powered watercraft including a pontoon section, a strut section, a deck section, and a solar canopy section is provided. The canopy section comprises a headliner layer, a ventilation space, and means for receiving solar radiation. The solar canopy may further comprise a means for flowing air through the ventilation space that includes a fan, a thermostatic switch, a photocell, air inlet ports, and air exhaust ports. The aft section of the pontoon, moreover, may possess a dual tapered design that reduces water friction and wake. The watercraft further includes means for containing a battery pack that, in turn, comprises means for removing heat and gaseous byproducts from the containing means. The containing means is either made integral with the pontoon or is attached to the pontoon's outer surface. The watercraft may possess an aft-oriented trim, which stabilizes the craft and reduces the effect of water forces.

The invention provides a water surface floating cleaner with a floating type fishing transportation structure. The floating cleaner comprises a cleaner body, a floating cylinder installed at the bottom of the cleaner body, a wind power driving device which is arranged at the stern and comprises two fans, a fishing device which is arranged on the bow and comprises two fishing plates arranged at thetwo ends of the bow, a transporting device which is installed on the cleaner body and comprises a conveying caterpillar band and a plurality of comb-shaped partition plates arranged on the conveyingcaterpillar, and a garbage collecting bin arranged on the cleaner body and located below the output end of the transporting device, wherein the rotating speeds of the two fans can be adjusted independently; a fishing region is formed between the two fishing plates, the width of the opening of the fishing region is adjustable, the input end of the transporting device stretches into the fishing region, and the output end of the transporting device is lifted to the portion above the cleaner body through a support. The water surface floating cleaner has the advantages of being high in practicability, convenient to operate and high in automatic degree, and can better achieve the purpose of water surface floating garbage cleaning inside small and medium size lakes, small ponds and the like.

The invention provides a hydrofoil equipment water craft comprising at least one hull member, terminating at a bow and a stern, a front hydrofoil member arranged in the zone of the bow of the hull, at least partially below the hull; and a rear hydrofoil member positioned to the rear of the longitudinal center of gravity (LCG) of the hull, the front hydrofoil member being at least partially offset transversely relative to the rear hydrofoil member so that the front hydrofoil or rear hydrofoil are at least partially disposed in separate longitudinal flow streams.

The positions and motions of a bow and a stern of the ship are detected using redundant devices and evaluated to automatically perform difficult maneuvers in ports or to generate recommendations for controlling the ship