115results about "Davits" patented technology

The invention is a hoisting device for a vessel a base structure provided with fixed cable blocks with pulleys; a trolley connected to a cable pulley block and a mechanism for gripping a load; a compensator a hoisting mechanism with a hoisting cable and a winch, wherein the hoisting cable is guided over the cable pulleys connected to the base structure and is adapted to move the trolley relative to the base structure with the aid of the winch; a secondary compensator with fixed cable blocks and pulleys connected to the base; a cable pulley set connected to the compensator end; a connection cable connected to a stationary section and a movable cable block with pulleys; a hoist connected to the vessel; a connecting cable guided over pulleys; and movable cable block and is adapted to move the compensator second end with the aid of the secondary hoisting mechanism.

Devices, apparatus and systems for raising and lowering watercraft such as personal watercraft, jet skis, inflatables from transoms on boats, from bulkheads and from docks, and for raising and lowering other types of vessels. A single actuator such as a fluid operated cylinder and single piston can raise and lower a cradle that supports the personal watercraft. An crank bracket can be fixably attached to a crank shaft, and an arm which supports the cradle can be fixably attached to the crank shaft. The arm can be extendable to different lengths. The cradle can include a self-leveling carriage that uses rollers to roll on a curved surface of the cradle allowing the supported watercraft to remain in a substantially level position thereon. An adjustable swivel mount can also be used to lock the cradle to the arm in a fixed orientation.

Systems and processes for closing openings in marine vessel hulls are provided. The systems and processes facilitate repairs and maintenance of marine vessels by closing openings in the marine vessel hulls to permit dry access to compartments in communication with the openings. The processes and systems incorporate a cover constructed from a lightweight material such as fiberglass, a viscoelastic material such as polyethylene or polyurethane, and blends thereof. The cover is guided in place to effectuate closure of the opening by a track device that receives at least two of the peripheral edges of the cover and directs the cover to the proper position to close the hull opening. The cover may be lowered into place by use of a hoisting device such as a davit.

A marine propulsion system that utilizes a transmission shift sequence to control shifting of the propulsion system transmission between forward and reverse gears. The marine propulsion system includes a controller that executes the transmission shift sequence using engine speed and transmission fluid pressure signals to determine the timing of various steps in the shift sequence. The controller is connected to a shift actuator for the transmission and to an engine speed throttle to thereby control transmission shifting and engine speed as a part of the transmission shift sequence. By monitoring engine speed and transmission fluid pressure, and by controlling transmission shifting and engine speed settings, the transmission shift sequence can provide the operator with the ability to carry out quick shifts that will neither stall the engine nor damage the transmission clutch.

The invention discloses an unmanned ship arrangement and recovery system which comprises a butt joint connected with a sling of a mother ship and further comprises an ejection mechanism, an ejection head, a cloud deck mechanism, a butt-joint mechanism and a pulling line which are mounted on an unmanned ship. The ejection mechanism is mounted on the cloud deck mechanism, and the cloud deck mechanism is used for adjusting the ejection angle of the ejection mechanism. One end of the pulling line is fixedly connected with the ejection mechanism, and the other end of the pulling line is connected with the ejection head. The pulling line is used for guiding the butt joint to be embedded into the butt-joint mechanism, and the ejection mechanism is used for ejecting the ejection head to the mastership. The butt-joint mechanism is used for fixing the butt joint to fix the unmanned ship to the sling. The unmanned ship arrangement and recovery system can improve the arrangement and recovery efficiency of the unmanned ship.

A lifting apparatus for raising and lowering a vessel such as personal watercraft, jet skis, inflatables may be mounted to a transom on boats, to bulkheads and to docks for raising and lowering vessels. A single actuator is used for raising and lowering a cradle that supports the vessel. An arm driven by the actuator is pivotally mounted to a mounting bracket and is extendable to different lengths. The cradle includes a self-leveling carriage that may use rollers to roll on a curved surface of the cradle allowing the supported watercraft to remain in a substantially level position thereon. An adjustable swivel mount is used to adjust the cradle to a desired horizontal orientation.

Automatic hooking device with a block locking mechanism having a automatic hooking means, operated only by the ascending movement of the block that is opportunely guided, hooking means including at least hook clamping means that act on projections and/or the head of block for the hooking of block and, locking means consisting of an automatic locking device in a steadily closed position of the hooking means, actuated by the same ascending movement of block and consisting of a mechanism suitable for assuming and permanently maintaining the clamped closing position of hook clamping means; and release means capable of releasing locking means following a power-assisted or manual command.

A cradle is shaped to accommodate the hull of a small boat such as dinghy, personal watercraft or other type of boat. A support is mounted to a deck such a boat, pier or cock deck. The cradle is pivotally mounted to the support and can be moved to a loading position in which the cradle is generally vertical, or inclined to horizontal, and an outer portion of the cradle is at the water adjacent to the deck. The small boat is moved upon the water against the cradle. A pair of lines extend from the support and are trained through an inner portion of the cradle. The free ends of the lines are attached to the boat, and the lines are drawn toward the support, for example with a hand wheel or hand winch. The boat is pulled toward the support while remaining in a generally horizontal orientation. The boat pivots the cradle from the loading position to a generally horizontal storage position on the deck where the boat and cradle are secured by the lines.

The invention relates to means for launching into the water, from a height H greater than a predetermined height h_max, a life-saving means (1) designed to be able to be launched into the water in free fall from this maximum height h_max. One end of a halyard (4) is fixedly hooked to the life-saving means or to the launch site (2); the halyard functionally cooperates (at 7) respectively with the launch site or the life-saving means so that the life-saving means falling by gravity is braked on and/or by the halyard over at least one part (H-h_max) of its drop height. By controlling the braking effect, the life-saving means, falling from the height H in a braked manner over at least one part (H-h_max) of this height hits the surface of the water (5) with a kinetic energy not exceeding that which it would have at the end of a non-braked free fall from at most the height h_max.

The invention relates to a device for launching and retrieval of a deep sea pull-type sonar system. The device comprises a pulling winch, a cable guiding component and a kunckle crane, wherein the pulling winch mainly comprises a support, a drum mounted on the support, a towrope wound on the drum, and a cable arranging mechanism mounted on the support; one end of the drum is connected with a cablecollecting and laying driving mechanism; a photoelectric slip ring is arranged at the other end of the drum; the cable guiding component comprises a cable guiding bracket and is connected onto a deckthrough a linear guide rail pair and a ball screw; a cable guiding pulley is mounted in the cable guiding bracket; a cable guiding piece provided with a worm cable guiding groove is arranged at the end close to the stern; two pneumatic support rods are connected between the cable guiding piece and the cable guiding bracket; the kunckle crane mainly comprises a base, a main arm rotatably connectedonto the base, a folding arm connected with the upper end of the main arm, a folding arm oil cylinder arranged between the folding arm and a support arm, a telescopic arm mounted in the folding arm,and a telescopic oil cylinder connected with the telescopic arm and the folding arm; and a lug ring for hanging a release is arranged at the outer end of the telescopic arm. The device is easy to control, saves manpower and is high in reliability.

The invention provides a system and a method for automatic unhooking and hooking by lifting and placing of an unmanned ship. The system for automatic unhooking and hooking by lifting and placing of the unmanned ship comprises a first locking device and a second locking device, wherein the first locking device comprises first clamping structures and elastic structures; elastic force of the elasticstructures is applied to the first clamping structures; the second locking device comprises second clamping structures; one of the first locking device and the second locking device is used for connecting with a recycling base body, and the other one of the first locking device and the second locking device is used for fixedly connecting with the unmanned ship; and the second locking structures can be locked with the first locking structures against the elastic force to enable the first locking device and the second locking device to be connected in a locked manner. The system for automatic unhooking and hooking by lifting and placing of the unmanned ship greatly simplifies the operation of operators, and reduces the operation risk. In addition, the locking operation of the system for automatic unhooking and hooking by lifting and placing of the unmanned ship can be realized only through mechanical components without electric components, so that the reliability is higher in marine andother water environments, and the production cost is saved.

A control system to control the descent of a seafaring vessel, such as a lifeboat, into water is disclosed herein. The control system, and an accompanying method, control the descent speed of the seafaring vessel to minimise the possibility of setback after splashdown, and thus increase the probability of a safe and orderly launch.

The maritime transfer system is for crewmember safety when transferring to and from a vessel to a small oil or gas production platform that otherwise has only a swing rope for transfer. The system includes a platform extension permanently affixed to the platform, and a motor and winch installed on the extension. The motor and winch operate a cable that extends to a davit, the davit and cable suspending a car or gondola therefrom. Control is provided by a remote control switch installed on the distal end of a freely suspended control cable. In this manner, the car may be raised to the platform when not in use, the control hanging from the control cable for access from the crew vessel when needed. The crewmember may then carry the control with him or her in the car as it is raised and lowered to and from the platform.

The invention relates to an automatic laying and recycling system for unmanned surface vehicles. The automatic laying and recycling system for unmanned surface vehicles comprises a mother ship, wherein a control table is arranged at one end of the upper end surface of the mother ship; a crane is arranged at the other end of the upper end surface of the mother ship; and a laying and recycling device is hoisted at the other end of the crane. The automatic laying and recycling system for unmanned surface vehicles has the advantages that the device is a general device, and is simple in structure, convenient to control, high in precision, high in stability and the like; when the laying and recycling system is used, and the circumstances that precise instruments in the unmanned surface vehicles cannot work normally due to impact in a laying and recycling process and the unmanned surface vehicles are not at normal positions in a laying and recycling process under the high sea state can be prevented effectively; and comprehensive automation of the unmanned surface vehicles can be realized, and operability of laying and recycling is improved.

The invention aims to provide a foldable extensile suspension arm which comprises a substrate, a main arm, a main arm draw bar, a front arm, a front arm draw bar, a joint, a connecting block, a first hydraulic cylinder and a second hydraulic cylinder, wherein two ends of the main arm and the main arm draw bar are respectively connected with the substrate and the joint through respective shafts; the main arm, the main arm draw bar, the substrate and the joint form a parallel four-bar linkage mechanism; two ends of the first hydraulic cylinder are respectively connected with the substrate and the main arm; two ends of the front arm and the main arm draw bar are respectively connected with the joint and the connecting block by respective shafts; the front arm, the front arm draw bar, the joint and the connecting block form a parallel four-bar linkage mechanism; and two ends of the second hydraulic cylinder are respectively connected with the joint and the front arm. According to the two sections of mechanical arms and one section of telescoping mechanism proposed by the foldable extensile suspension arm, the length of the suspension arm can be determined as required, the requirement of the overlong arm can be realized, and meanwhile, the foldable extensile suspension arm is convenient to fold, the transportation and storage space is greatly reduced, and the safety of a mother ship is improved.

The invention relates to a hanging type small boat retracting and releasing device and method. The device comprises a suspension walking mechanism, a capturing mechanism, a steel cable winding and unwinding mechanism and recycling guide mechanisms, the suspension walking mechanism comprises a suspension arm, a crane and a walking drive, the suspension arm is fixed to the side of a mother ship, andthe walking drive drives the crane to walk along the suspension arm; the capturing mechanism comprises a bracket, a capturing rod and a capturing head, the bracket is a U-shaped frame body, the capturing rod is fixed to the inner side of the head of the bracket, and the capturing head is fixed to the outer side of the bow of a small boat and corresponds to the capturing rod; the steel cable winding and unwinding mechanism comprises a winding and unwinding winch, winding and unwinding pulley blocks and winding and unwinding steel cables, the winding and unwinding pulley blocks are multiple fixed pulleys and are installed on the crane corresponding to the lifting points of the bracket respectively, and the tail ends of a number of winding and unwinding steel cables bypass a number of fixedpulleys respectively; and the recycling guide mechanisms are radio receiving and releasing equipment, are respectively arranged at the height point of the small boat and the tail end of the suspensionarm and are used for signal interaction. Automatic releasing and retracting of the small boat are achieved, and the small boat is prevented from rotating and swinging.

A swim platform lift mechanism is disclosed, the mechanism mounted between the transom of a boat and a bottom surface of a swim platform. The lift mechanism provides a powered lifting/lowering of the swim platform from a retracted position that is level with the deck of the boat to a deployed position in which the swim platform is below the surface of the water surrounding the boat and from the retracted position to an up-and-over position in which the swim platform and its contents are positioned above and forward of the rear edge of the deck. When in the retracted position, an adjustable stop interfaced to the swim platform abuts rest areas on lower arms of the lift mechanism, thereby providing structural support to the swim platform.

The invention relates to a davit carrying moving-lifting type small boat retracting-releasing device. A three-stage telescopic rail part is arranged on a deck of a mother ship, and the third-stage telescopic rail part comprises a fixed rail fixed to the deck, a middle rail which can extend outside the hull of the mother ship or retract inside the hull of the mother ship and a last-stage rail; a telescopic power part is arranged on the side face of the fixed rail, and a lifting power part and a lifting and transmitting part are arranged above the last-stage rail; the lifting power part drives an active lifting sprocket wheel to draw a chain from a chain storage box or put a chain in the chain storage box through a coupling, the movement direction of the chain is changed into vertical movement through a transition sprocket wheel B on a corner sprocket wheel assembly; and a davit part is connected to the tail end of the chain through a chain shackle assembly. The davit carrying moving-lifting type small boat retracting-releasing device is simple and reasonable in structure, and the safety and reliability of the device is further improved; a small boat is in a state of horizontal moving in the process of retracting and releasing the small boat, the small boat floats on the surface of water and is automatically separated from the davit after the small boat enters the water, and thecomfort of passengers of the small boat and the safety of the passengers and materials in the retracting and releasing process are improved.

The invention relates to the field of unmanned boat release and recovery, and discloses an unmanned boat release and recovery device and an unmanned boat release and recovery method. The unmanned boatrelease and recovery device comprises a mother ship (1); a boat davit (2) is arranged on the mother ship (1); a boat hanging rope (3) is arranged on the boat davit (2) and connected with a shackle (11), the shackle (11) is connected with a release unhook (12) or a recovery cable (15), the release unhook (12) is used for being connected with a hanging point (13) of an unmanned boat (4), the recovery cable 15 is used for connecting with the hanging point 13 of the unmanned boat 4, and the release unhook (12) is connected with an unhook release cable (5) which is used for opening a switch of therelease unhook (12). The boat hanging rope (3) comprises a first lute head (10), and the shackle (11) is connected with the boat hanging rope (3) through the first lute head (10). The unmanned boat release and recovery has the advantages of being simple in structure, convenient to implement, good in stability, high in reliability, high in use efficiency and low in manufacturing cost.

An apparatus for securing a watercraft to another vessel or platform with a rack assembly. The rack assembly is adapted to lift and carry a watercraft out of the water. The rack assembly has a pair of rails adapted to support the watercraft. The pair of rails pivot whereby the ends of the pair of rails moves from a submerged position suitable for driving the watercraft onto the pair of rails to a raised position with the ends of the pair of rails is above the water level.