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42results about "Swimming framework" patented technology

Amphibious exoskeleton propulsion footwear

ActiveUS12458847B2Swimming frameworkSwim finsMarine engineeringGait speed
Embodiments of footwear to optimize propulsion while swimming in the water and walking on land, in particular, amphibious footwear capable of duty on land and in the water as well as versions that are optimized for predominantly use in the water for swimming. The exoskeleton amphibious footwear reduces metabolic demand of walking and swimming while also improving gait speed and swim speed. This is accomplished by assisting plantar flexion during land mode, and assisting dorsiflexion in water mode.
Owner:ROSER MARK COSTIN

SWIMMING AND DIVING AID WITH A CAMERA

ActiveDE502018015853D1Swimming frameworkCamera body details
Owner:CAYAGO TEC GMBH

Submersible propeller

PendingUS20260027421A1Gymnastic exercisingSwimming frameworkThighPropeller
A control method using angle controllers to sense an included angle between a diver's thigh and a calf and controlling a propellor state based on the included angles. The propellor states include a retreating state when both included angles are 90° or less, a static state when both included angles are 90° to 135°, a variable-speed advancing state when both included angles are greater than 135°, a turning-left state when the left included angle is 90° to 135° and the right included angle is greater than 135°, a turning-right state when the right included angle is 90° to 135° and the left included angle is greater than 135°, and an in-situ spinning state when one included angle is 90° or less and the other included angle is greater than 135°.
Owner:LIN QUN

Diver propulsion assembly incorporating a handheld controller and haptics feedback

A diver propulsion assembly includes an assembly harness for being worn by a diver. At least one thruster is carried by the assembly harness and is adapted for propelling the diver through a body of water. The thruster incorporates an electric motor, drive shaft and propeller. A battery is operatively connected to the thruster. A handheld controller is operatively connected to the electric motor of the thruster and is adapted for the controlling at least one of motor activation, propeller speed and propeller direction. The handheld controller incorporates a haptics feedback mechanism configured to generate tactile sensations in a hand of the diver to nonvisually and nonverbally communicate to the diver realtime operational data of the thruster.
Owner:PATRIOT3 INC

Swiming and diving scooter with camera

ActiveEP3570945B1Swimming frameworkCamera body details
The invention relates to a swimming and diving aid, comprising a hull, which includes a flow channel or is associated with a flow channel, the flow channel being associated with a motor-driven water-acceleration system, in particular a propeller; comprising a support surface for a torso on an upper side of the hull; comprising hand grips attached to the swimming and diving aid, with operating elements on the hand grips for controlling the water-acceleration system by means of an associated motor control; and comprising a display facing the support surface for displaying operating parameters of the swimming and diving aid. According to the invention a forward-facing camera is integrated into the hull in front of the support surface as seen looking in the direction of travel and connected to an electronic control system; the electronic control system is configured to control the forward-facing camera and receive the camera signals; and a switch element for starting and ending a video recording is disposed on at least one hand grip. The invention allows video recordings to be made looking in the direction of travel of the swimming and diving aid.
Owner:CAYAGO TEC GMBH

Submersible vehicle

PCT designated stage expiredWO2025153381A1Swimming frameworkHydrodynamic/hydrostatic featuresDrive shaftClassical mechanics
The invention relates to a submersible vehicle comprising a hull (10) in which a flow channel (39.2) is at least partially accommodated, or wherein a flow channel (39.2) is associated with the hull (10), wherein the flow channel (39.2) is arranged at least partially within a flow channel receiving portion (38), in particular a protuberance (39.3), which preferably protrudes from the lower hull portion (30), wherein a water acceleration device, in particular a propeller (36), is arranged in the flow channel (39.2) and can be driven indirectly or directly by a motor (61) by means of a drive shaft (62). In order to adapt the hydrodynamics of such a submersible vehicle both for underwater travel and for surface travel, according to the invention a lateral fin (110) is arranged on each of the port and starboard sides in the region of the stern of the hull (10), each lateral fin being adjustable between at least two operating positions.
Owner:CAYAGO TEC GMBH

Improved heat dissipation structure of underwater propeller

The invention provides an improved heat dissipation structure of an underwater propeller, which comprises a shell device comprising a machine shell, and the machine shell is internally provided with at least one closed front control accommodating chamber and a rear motor accommodating chamber; the circuit control device is arranged in the control containing chamber; the battery device is connected to the front end of the shell; the motor device comprises a motor which is arranged in the motor accommodating chamber, a motor front cooling chamber is formed at the front end of a motor shell, a motor rear cooling chamber is formed at the rear end of the motor, the motor front cooling chamber and the motor rear cooling chamber are filled with cooling oil, and a motor transmission rod protrudes from the rear end of the motor; the turbofan device comprises a turbofan rotating head, the turbofan rotating head is fixedly connected with the motor transmission rod, and a plurality of fan blades are distributed on the periphery of the turbofan rotating head; therefore, the heat dissipation effect of the whole motor can be positively provided, and the motor has comprehensiveness and efficiency of heat dissipation of the motor and safety of use of the motor.
Owner:SUPERCENTAUR TECHNOLOGY CO LTD

Self-driven high-safety foam life jacket

The invention relates to the technical field of navigation lifesaving, in particular to a self-driven high-safety foam life jacket which comprises a life jacket body, the life jacket body comprises a first lining, a foam floating-assisting block, a second lining and an external foam floating-assisting plate, and a solar energy supply panel is fixedly installed on the outer side face of the external foam floating-assisting plate. And a manual control type electric control driving pump is mounted in the external foam floating-assisting plate. The self-driven high-safety foam life jacket is composed of the first lining with the surface sewed with the foam floating-assisting blocks and the second lining with the surface sewed with the external foam floating-assisting plates, the bottom-separable structural design is adopted, the back breathability can be improved when the life jacket is worn, a floating platform can be formed when the life jacket floats, and therefore the life jacket can be used for protecting the back of a user. A wearer can conveniently lie on the water surface; a solar energy supply panel is fixedly installed on the outer side face of the external foam floating-assisting plate, sunlight is converted into electric energy through the solar energy supply panel during floating, and therefore energy supplementation is facilitated.
Owner:JIANGSU BAIZHOU SAFETY TECH CO LTD

Submersible propeller

ActiveEP4074386B1Gymnastic exercisingSwimming framework
The present disclosure relates to the technical field of propellers, and specifically provides a submersible propeller, which includes a battery and propellers in which: the propellers include a left propeller and a right propeller; front portions of the left propeller and the right propeller are connected to a waist-wearing power supply battery through a power supply cable for the left propeller and a power supply cable for the right propeller respectively; rear portions of the left propeller and the right propeller are connected to a left angle controller and a right angle controller through a connection cable for the left angle controller and a connection cable for the right angle controller respectively; and the left propeller and the left angle controller are symmetrically distributed left-and-right with respect to the right propeller and the right angle controller. As compared with the prior art, by using angle controllers on the legs, various modes such as advancing, variable-speed advancing, retreating, turning, and in-situ spinning can be implemented. The entire operation process only relies on adjustment of an included angle between the thigh and the calf by the diver, and a control by hand is not required at all.
Owner:LIN QUN

Underwater boosting device

The utility model discloses an underwater boosting device which comprises an outer shell, a power structure installed on one side of the outer shell, a power source installed on the outer shell and electrically connected with the power structure, the power source and the power structure are oppositely arranged, and an installation rod of a holding structure is installed on the outer shell and located between the power structure and the power source. The two heat conduction grips are connected to the two opposite ends of the installation rod and form heating cavities, and one heating piece is contained in one heating cavity. In the actual use of the underwater boosting device, a user holds the two heat conduction grips, the power structure drives the user to move underwater under the mutual cooperation of the power source and the power structure, and in the process, the heating piece located in the heating cavity heats the heat conduction grips, so that the heat conduction grips are heated; therefore, the situations of hand numbness, cramp and the like caused by too low underwater temperature during use can be avoided, and the use experience and the safety performance of the underwater boosting device are better.
Owner:广西城市职业大学

submersible vehicle

PendingDE102024101619A1Swimming frameworkPropulsive elementsDrive shaftClassical mechanics
The invention relates to a submersible vehicle with a hull (10) which has a lower section (30) in the region of its underside, wherein a flow channel (39.2) is accommodated at least in part in the hull (10) or wherein a flow channel (39.2) is assigned to the hull (10), wherein the flow channel (39.2) is arranged at least in part within a flow channel receptacle (38), in particular a bulge (39.3), which preferably protrudes from the lower section (30), wherein a water acceleration device, in particular a propeller (36), is arranged in the flow channel (39.2), which can be driven directly or indirectly by a motor (61) by means of a drive shaft (62).In order to improve the driving characteristics of such a submersible vehicle, the invention provides that downward-facing sliding surfaces (37) are provided on both sides of the hull (10), and that at least one buoyancy wing (80) is arranged protrudingly on the lower part of the hull (30) in order to generate a buoyancy force in the rear region of the submersible vehicle during driving operation.
Owner:CAYAGO TEC GMBH

High altitude safety dolly and modular rigid rail system

ActiveCN117729962BSafety beltsSwimming frameworkStructural engineeringControl theory
The present invention relates to an aerial safety dolly and modular rigid rail system designed for construction and maintenance personnel working at heights, enabling continuous, smooth and fail-safe operation for fall arrest, rope travel and descent. The aerial safety dolly has a connecting arm, a clamp body and a main frame operatively interfacing with a rail engagement mechanism movable between a rail engagement position to engage a rigid rail and a disengagement position to disengage the rigid rail. The rail engagement mechanism can include an integral pivoting arm that simultaneously closes inward to engage the rigid rail and outward to disengage the rail. Thus, the dolly can be easily and safely connected and disconnected at any location along the rigid rail.
Owner:SAYFA R&D PTY LTD

Underwater propulsion device

ActiveCN113384854BSwimming frameworkStructural engineeringMechanical engineering
The application discloses an underwater boosting device, which comprises a cabin body, a propeller arranged in the cabin body, two handles symmetrically arranged on the side of the cabin body, and two connecting assemblies arranged between the cabin body and the handles to rotationally connect the handles and the cabin body. The handles and the cabin body are rotationally connected through the connecting assemblies, so that a diver only needs to rotate the handles to change the direction during diving, and the underwater boosting device is easy to change the direction during diving, thereby improving the use experience of the diver.
Owner:SHENZHEN BIFOXS IND DESIGN

Floating and diving assistance device with camera

The invention relates to a floating and diving assistance device, comprising: a main body having or being provided with a flow channel, the flow channel being provided with a motor-driven water acceleration device, in particular a propeller; a support surface for an upper body on the upper side of the main body; the handle is arranged on the floating and diving auxiliary device, and an operating element for controlling the water accelerating device by means of a corresponding motor control device is arranged on the handle; and a display facing the support surface for displaying operating parameters of the floating and diving aid. According to the invention, a forward-oriented front camera is integrated in the main body in front of the support surface in the direction of travel and is connected to the control electronics such that the control electronics are designed to actuate the front camera and to receive camera signals, at least one handle is provided with a switch element used for starting and ending video shooting. The present invention enables video recording in the traveling direction of a floating and diving assistance device.
Owner:CAYAGO TEC GMBH

Wearable amphibious assistance and control system

The invention relates to a wearable amphibious assistance and control system which is characterized in that an exoskeleton right structure assembly is fixed on the upper and lower sides of a right leg knee joint of a user, an exoskeleton left structure assembly is fixed on the upper and lower sides of a left leg knee joint of the user, and a right propeller assembly is fixed on the upper part of the exoskeleton right structure assembly; the left propeller assembly is fixed to the upper portion of the exoskeleton left structure assembly. The multifunctional waist bag is fixed to the waist of a user, an integrated electric control system is installed in the multifunctional waist bag, the integrated electric control system is connected with the exoskeleton right structure assembly and the exoskeleton left structure assembly through watertight cables, and a land movement mode and / or an underwater movement mode are / is achieved so that the assisting function can be achieved for left and right knee joints of the user; the integrated electric control system is connected with the right propeller assembly and the left propeller assembly through watertight cables, and the diving propelling function on a user in the underwater movement mode is achieved. The structure portability of the power assisting device can be improved, and various power assisting propelling functions of the propeller on land and in water can be expanded.
Owner:BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS

Floating plate swimming booster convenient to disassemble

ActiveCN224194044Uquick disassembly workWill not affect maintenance workSwimming frameworkFixed framePropulsor
The utility model discloses a floating plate swimming booster convenient to disassemble, which comprises a floating plate body, disassembly assemblies are respectively arranged on two sides of the floating plate body, and a grip assembly is arranged on one side of the floating plate body; the dismounting assembly comprises a clamping groove and a clamping plate, the clamping groove is formed in the top and the bottom of the floating plate body, the clamping plate is clamped to the inner side wall of the clamping groove, a propeller body is fixedly installed on one side of the clamping plate, a fixing frame is fixedly installed on the top of the floating plate body, a sliding rod is slidably connected to the top of the fixing frame, and the sliding rod is clamped to the clamping plate; the side wall of the sliding rod is fixedly connected with a lifting plate. The swimming booster relates to the technical field of swimming boosters. According to the floating plate swimming booster convenient to disassemble, through the arranged disassembling and assembling assembly, the propeller body can be quickly disassembled and overhauled, when the propeller body is damaged, the propeller body can be disassembled and overhauled in time, normal maintenance work cannot be affected, the propeller body is easy and convenient to assemble and disassemble, and the use experience is guaranteed.
Owner:LANGCHI UNDERWATER TECHNOLOGY (DONGGUAN) CO LTD

Submersible thruster, angular controller therefor and control method

ActiveCN117205521BGymnastic exercisingSwimming frameworkElectrical batteryControl theory
The present application relates to a diving propeller, an angle controller and a control method thereof, in particular to a diving propeller. The diving propeller comprises a battery and a propeller, characterized in that: the propeller comprises a left propeller and a right propeller, the front part of the left propeller and the right propeller is connected with a waistband power supply battery through a left propeller power supply cable and a right propeller power supply cable respectively; the rear part of the left propeller and the right propeller is connected with a left angle controller and a right angle controller through a left angle controller connecting cable and a right angle controller connecting cable respectively; the left propeller and the left angle controller and the right propeller and the right angle controller are distributed in a left-right symmetry. Compared with the prior art, the angle controller on the leg can be used to carry out the modes of advancing, variable speed advancing, retreating, turning, and turning in place, and the whole operation process only relies on the diver to control the angle between the left leg and the right leg, and does not need to be controlled by hand.
Owner:林群

Propeller

Disclosed is a propeller, including a main driving device. Foldable blades and a fixed propeller are detachably connected to a projecting shaft of a driving motor. When the foldable blades are arranged, the propeller can be used as a hydrofoil board booster, and be clamped to a vertical rod of the hydrofoil board. When a fixed propeller is surrounded by a water flow culvert pipe provided with water inlet grooves, the propeller can be handheld with a handheld bracket or worn to advance and play underwater. Further, the propeller can be used as a guiding device for a diving apparatus. In combination with a gas cylinder and an airbag, the propeller can also be used as a scuba gear. Together with movable and fixed hydrofoil boards, the propeller can also be used as a gliding apparatus for diving.
Owner:INNO INSTR AMERICA INC

watercraft

A watercraft has a hull which, in the area of the deck has a support on which parts of the upper body of a user can rest and where the user can hold on to handles. A flow channel is defined on the hull and a propelling screw is disposed in the flow channel. The flow channel has an intake port and downstream of the propelling screw a jet outlet in the stern area. A support body is disposed on the stern area in such a way that the support body extends the support by means of its support surface. In such a watercraft, a considerable increase in traveling speed can be achieved if provision is made for at least one sliding surface to be provided on the underside of the support body and for the support body to be rigidly connected to the hull.
Owner:CAYAGO TEC GMBH

An underwater thruster fixing and casting device

ActiveCN111111115BSwimming frameworkMarine equipmentScrew thread
The present invention specifically relates to an underwater thruster fixing and casting device, belonging to the technical field of marine equipment. It includes a fixing member, a rotating member, a spherical ball, a fixing sleeve, a connecting member, and a thruster; a plurality of circular hole grooves are provided on the circumferential wall of the fixing member; spherical balls are arranged in each of the plurality of circular hole grooves; the spherical balls rotate and move within the circular hole grooves; the rotating member is disposed inside the fixing member; a plurality of arc-shaped hole grooves are provided on the outer circumferential wall of the rotating member; a plurality of convex platforms are provided on the lower end surface of the fixing member; threads are provided on the contact surface between the inner wall of the fixing sleeve and the outer wall of the connecting member; a plurality of grooves are provided at the upper end of the connecting member; the connecting member is fixedly connected to the convex platform of the fixing member through the grooves in a snap-fit manner; threads are provided on the outer wall of the connecting member; the connecting member and the fixing sleeve are fixedly connected through the threads; screw holes are provided on both the connecting member and the thruster for fixed connection. The present invention can increase the fixing reliability when the thruster is connected to an external carrier, and realize the rapid casting of the thruster by the external carrier.
Owner:SHENZHEN OUTE MARINE TECH CO LTD

Submersible propeller

A submersible propeller that includes a battery and propellers in which: the propellers include a left propeller and a right propeller; front portions of the left propeller and the right propeller are connected to a waist-wearing power supply battery through a power supply cable for the left propeller and a power supply cable for the right propeller respectively. Rear portions of the left propeller and the right propeller are connected to a left angle controller and a right angle controller through a connection cable for the left angle controller and a connection cable for the right angle controller respectively. The left propeller and the left angle controller are symmetrically distributed left-and-right with respect to the right propeller and the right angle controller. By using angle controllers on the legs, various modes such as advancing, variable-speed advancing, retreating, turning, and in-situ spinning can be implemented.
Owner:LIN QUN

Underwater propulsion device

An underwater propulsion device is disclosed comprising two sleeves for fitting around each of a user's lower legs, with each sleeve mounting a propulsion unit, and the sleeves being connectable by a bar between them during underwater operation of the device by the user.
Owner:ROBINSON BRANDON +2

Underwater propulsion device and diving suit

ActiveJP2025143182APropulsion power plantsSwimming frameworkPropellerMechanical engineering
To provide an underwater propulsion device and a diving suit.SOLUTION: An underwater propulsion device includes: a first sensing unit arranged on a thigh unit of a diver and a second sensing unit arranged on a shin on the same side; at least one angle sensor assembly body composed to sense an angle between the thigh unit and the shin of the diver based on relatively position relationship between the first sensing unit and the second sensing unit; and at least one propeller including a propeller body and at least one battery module; and a controller respectively connected to the at least one angle sensor assembly body and the at least one propeller to control the at least one propeller based on an angle signal sensed by the at least one angle sensor. The underwater propulsion device has flexible disposition, easy control, and both hands are capable of being released.SELECTED DRAWING: Figure 6
Owner:林群

Underwater swimming assisting mechanism and swimming assisting device based on electromyographic signal control

PendingCN121247020ASwimming frameworkSwim finsUnderwaterControl engineering
The invention discloses an underwater swimming aid mechanism based on electromyographic signal control and a swimming aid device. The underwater swimming aid mechanism based on electromyographic signal control comprises a control assembly, a waistband assembly, a left hip driving assembly, a right hip driving assembly, a leg transmission assembly, a propelling web assembly and an electromyographic acquisition module. After the electromyographic signals are transmitted to the controller, the three modes are automatically switched, and the web propulsion mode only controls the propulsion web to complete fine maneuver; in the hip propulsion mode, only hip joints are driven to provide basic swing assistance, and an intelligent, lightweight and multi-modal underwater swimming assisting system is formed. According to the invention, man-machine cooperation intellectualization is realized through the electromyographic signal acquisition and analysis system, three modes of hip-web cooperation, independent web propelling and hip power assisting can be dynamically switched, mechanical power assisting and human body actions are seamlessly fused, the energy consumption is obviously reduced, and the propelling efficiency is improved. The carbon fiber composite material is adopted to realize light weight, and the human engineering arc-shaped wearing plate and hinge joint design is matched, so that the wearing is stable and comfortable, and the legs move freely.
Owner:SOUTHWEAT UNIV OF SCI & TECH

Submersible propulsion device and diving suit

PendingUS20250289543A1Propulsion power plantsSwimming frameworkPropellerMechanical engineering
A submersible propulsion device and diving suit. The propulsion device includes: at least one angle sensor assembly having a first sensing unit to be disposed on a thigh and a second sensing unit to be disposed on a calf on the same side of the diver, and being configured to sense an angle between a thigh and a calf on a corresponding side of the diver based on a relative positional relationship between the respective first sensing unit and second sensing unit; at least one propeller having a propeller body and battery module; and a controller connected to the angle sensor assembly and the propeller respectively, so as to control the propeller based on an angle signal sensed by the angle sensor assembly. The submersible propulsion device is flexible in configuration and convenient to control, and can free both hands.
Owner:LIN QUN

Submersible propulsion device and diving suit

PendingEP4620539A1Propulsion power plantsSwimming framework
The present application provides a submersible propulsion device and a diving suit. The submersible propulsion device comprises: at least one angle sensor assembly, the at least one angle sensor assembly comprising a first sensing unit to be disposed on a thigh and a second sensing unit to be disposed on a calf on the same side of the diver, and the at least one angle sensor assembly being configured to sense an angle between a thigh and a calf on a corresponding side of the diver based on a relative positional relationship between the respective first sensing unit and second sensing unit; at least one propeller, comprising: a propeller body and at least one battery module; and a controller, wherein the controller is connected to the at least one angle sensor assembly and the at least one propeller respectively, so as to control the at least one propeller based on an angle signal sensed by the at least one angle sensor assembly. The submersible propulsion device according to the embodiments is flexible in configuration and convenient to control, and can free both hands.
Owner:LIN QUN

Wading power backpack

ActiveCN223644953USwimming frameworkLife-savingFisheryMechanical engineering
The utility model discloses a wading power knapsack which comprises a knapsack body, a floating assembly and a propelling assembly, the floating assembly comprises a floating filling piece and at least one floating piece, the floating filling piece is arranged in the knapsack body, and the floating filling piece is configured to provide buoyancy for the knapsack body so that the upper body of a user can be located above the water surface; the floating pieces are detachably arranged on straps of the bag body, the floating pieces are configured to prevent the upper body of a user from inclining into water when the propelling assembly is propelled in water, the propelling assembly comprises a controller and at least one set of propellers, the controller is arranged on the bag body, and the propellers are arranged at the bottom of the bag body; and the controller is configured to control the propeller to push a user of the bag body to move in water. According to the wading power backpack, buoyancy is provided for the chest position of a user through the detachable floating piece, so that the upper body of the user is far away from the water surface, and the situation that the head of the user is close to the water surface and inhales water when the propelling assembly is propelled is avoided.
Owner:JIANGSU RENHUA POLICE EQUIP CO LTD

Power-assisted umbrella pedal for increasing swimming speed

PendingCN120643885ASwimming frameworkSwim finsClassical mechanicsStirrup
The invention discloses a power-assisted umbrella pedal for increasing swimming speed. The power-assisted umbrella pedal structurally comprises a pedal sleeve, umbrella-shaped waterproof cloth, an elastic rubber band and the like. The pedal sleeve is used for fixing the umbrella pedal on a foot, the umbrella-shaped waterproof cloth is used for opening the umbrella-shaped waterproof cloth to stop water when the foot pedals backwards during swimming, and the elastic rubber band is used for strongly pulling back the opened umbrella-shaped waterproof cloth. According to the swimming booster umbrella pedal, the swimming speed can be increased, each swimmer can master swimming skills more easily, and the swimming speed can be increased. And meanwhile, drowning events of the swimming beginner are reduced. Therefore, confidence and pleasure of the swimmer are improved.
Owner:李良

Symmetrical reversal double-rotor shaftless propeller

PendingCN121404473APropulsion power plantsSwimming frameworkImpellerGear wheel
The invention relates to a symmetrical reverse rotation double-rotor shaftless propeller which comprises a body, hydrofoils, an energy storage part, a propelling part and a grabbing part. A motor is installed on the inner side of the motor shell, the output end penetrates through the mechanical sealing mechanism to be connected with a first straight gear, a second gear is in meshing transmission with the outer side of the first gear, and a gear is arranged on one side of the second gear. A first rotating ring and a second rotating ring are rotationally arranged on the inner side of the first shell and the inner side of the second shell, a motor drives the two rotating rings provided with gear rings to rotate reversely through a gear set, aquatic sundries cannot be wound, the double rotating rings are symmetrically arranged to generate balance thrust, single-shaft torque is offset, operation is stable, and vibration and energy loss are reduced. The left outer tooth impeller and the right outer tooth impeller are symmetrically arranged, the angles and the rotation directions of the impellers are opposite, thrust is the same, an exposed shaft system is eliminated, sundries such as aquatic plants and fishing nets cannot be wound, balance thrust is generated, single-shaft torque is effectively offset, control is easy, and vibration and energy loss are reduced. Meanwhile, the propeller can be provided with hydrofoils, so that people can stand on the hydrofoils to run.
Owner:SHAOXING YIDONG ELECTROMECHANICAL TECH CO LTD