KR20170090702A - Water wake board - Google Patents

Water wake board Download PDF

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Publication number
KR20170090702A
KR20170090702A KR1020160011382A KR20160011382A KR20170090702A KR 20170090702 A KR20170090702 A KR 20170090702A KR 1020160011382 A KR1020160011382 A KR 1020160011382A KR 20160011382 A KR20160011382 A KR 20160011382A KR 20170090702 A KR20170090702 A KR 20170090702A
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KR
South Korea
Prior art keywords
bar
board
handle
screw
support
Prior art date
Application number
KR1020160011382A
Other languages
Korean (ko)
Inventor
조현진
Original Assignee
조현진
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 조현진 filed Critical 조현진
Priority to KR1020160011382A priority Critical patent/KR20170090702A/en
Publication of KR20170090702A publication Critical patent/KR20170090702A/en

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    • B63B35/73—
    • B63B35/81—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
    • B63H21/17—Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
    • B63H25/02—Initiating means for steering, for slowing down, otherwise than by use of propulsive elements, or for dynamic anchoring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63B2035/813—
    • B63B2035/818—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
    • B63H25/02—Initiating means for steering, for slowing down, otherwise than by use of propulsive elements, or for dynamic anchoring
    • B63H2025/024—Handle-bars; Posts for supporting handle-bars, e.g. adjustable posts

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Toys (AREA)

Abstract

According to an embodiment of the present invention, a water wakeboard comprises: a board floating on a water surface to be moved by thrust; a screw installed on an upper surface of a lower surface of the board to provide the thrust; a rudder installed in a lower portion of the board to guide a proceeding direction of the board; and a handle support connected to the rudder to be rotated along with the rudder, and rotated toward the front or the rear of the board.

Description

The winning wakeboard {WATER WAKE BOARD}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aquatic wake board, and more particularly, to an aquatic wake board capable of rotating a handle support forward / backward or right and left.

In general, there are jet wakes, motorboats and water board which can be taken from the water. Jet ski and motor boats are self-powered leisure, .

However, there is a disadvantage that the jet ski and the motor boat have a high price, which makes it difficult for the ordinary people to easily purchase or rent, and thus it takes a lot of economic burden to receive a cooperative license with the education.

Korean Unexamined Patent Application Publication No. 2005-0092076 (2005.09.16.)

SUMMARY OF THE INVENTION An object of the present invention is to provide a water wake board capable of safely and simply attaching a power unit and a screw to perform leisure activities in the water.

Another object of the present invention is to provide an aquatic wakeboard which can enjoy a sense of speed by changing a boarding posture through a handle support according to the speed.

Other objects of the present invention will become more apparent from the following detailed description and the accompanying drawings.

According to an embodiment of the present invention, an aqua wakeboard comprises: a board floating on a water surface and movable by a propulsion force; A screw installed on an upper surface or a lower surface of the board to provide the driving force; A direction key provided at a lower portion of the board to guide a traveling direction of the board; And a handle supporter connected to the direction key, rotatable together with the direction key, and rotatable toward the front or rear of the board.

The angle of the direction key with the center line along the longitudinal direction of the board can be adjusted according to the rotation of the handle support.

The handle support comprises a hollow support bar; And a control bar inserted into the support bar through an upper end of the support bar and movable along the longitudinal direction of the support bar, wherein the winnow wake board is mounted on the lower part of the board, And a lower cover forming a space.

The water wake board includes: a power providing device for supplying power to the screw; And a handle fixed to an upper end of the handle supporter and having an operation switch for adjusting the operation of the power providing device and a shift switch for adjusting the output of the power providing device.

Wherein the board has an opening formed so as to be recessed from an upper surface of the board, the water wake board having a lower end fixed to the handle support and rotatably connected to the board to open and close the opening by rotation; And a structural bar connected to a rear surface of the board.

The water wake board further includes a cylindrical support bracket installed at an opening formed in the board and extending through the handle support and supporting an outer circumferential surface of the handle support, .

The winning wake board includes: an adjusting bar installed at a lower portion of the board and rotatable together with the handle support; A transfer bar installed at a lower portion of the board and rotatable about a hinge fixed at the center; A wire connecting the connection bar and the transmission bar in an eleven character form to rotate the transmission bar in the same direction as the rotation direction of the connection bar; And a screw support shaft installed on the transfer bar and rotatable together with the transfer bar, to which the screw and the direction key are fixed.

Wherein the winning wake board comprises: a connecting bar provided at a lower portion of the board and rotatable together with the handle supporter, the connecting bar having a guide slot formed along a longitudinal direction; An operation bar installed at a lower portion of the board and rotatable and having an operation slot formed along the longitudinal direction; A guide protrusion inserted into the guide slot is installed at one side and an operation protrusion inserted into the operation slot is installed at the other side so that the connection bar rotates around the hinge, The guide protrusion is moved along the guide slot and the operation protrusion moves along the operation slot to rotate the operation bar in the same direction as the rotation direction of the connection bar; And a screw support shaft installed on the operation bar and rotatable together with the operation bar, wherein the screw and the direction key are fixed.

According to the embodiment of the present invention, the screw can be attached to the board safely and simply so that leisure activities can be performed in the water. In addition, by adjusting the position of the handle support according to the speed, you can enjoy the feeling of speed by changing the boarding posture. Also, the direction of travel can be adjusted through the handle.

1 is a view schematically showing an aqua wakeboard according to an embodiment of the present invention.
2 is a view showing a handle support, a direction key and a support bracket shown in Fig.
3 is a view showing a connection state between the handle support and the support bracket shown in Fig.
Fig. 4 is a view showing the screw and the adjustment motor shown in Fig. 1. Fig.
5 is a block diagram showing a control method of an adjusting motor using the handle shown in Fig.
FIG. 6 is a view illustrating a handle support, an adjusting bar, and a connecting bar according to another embodiment of the present invention.
7 is a plan view showing the support bracket shown in Fig.
FIG. 8 is a view showing a direction bar and a screw installed on a transfer bar / operation bar and a screw support shaft, and a screw support shaft connected to the connection bar shown in FIG. 6;
9 to 11 are views showing the state of the connecting bar and the transfer bar / operating bar according to the state of the handle shown in Fig.
Fig. 12 is a variation showing a direction key and a screw provided on the transmission bar and the screw support shaft and the screw support shaft shown in Fig. 8;
Figs. 13 to 15 are modification examples showing the state of the transfer bar according to the state of the handle shown in Fig. 6. Fig.
16 is a view showing a modified example of the handle support shown in Fig.
17 is a view showing a modified example of the handle shown in Fig.
Figs. 18 and 19 are views showing a rotating state of a rotating plate fixed to the support bracket shown in Fig. 1. Fig.
20 is a view showing the structure bar shown in Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments of the present invention can be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. The embodiments are provided to explain the present invention to a person having ordinary skill in the art to which the present invention belongs. Accordingly, the shape of each element shown in the drawings may be exaggerated to emphasize a clearer description.

1 is a view schematically showing an aqua wakeboard according to an embodiment of the present invention. The winning wake board includes a board 15 and a handle support 20. The occupant can adjust the traveling direction of the board 15 through the handle 10. The handle 10 is connected to the direction key 29 through the handle support 20 and the direction key 29 is rotated as the handle 10 is rotated to adjust the traveling direction of the board 15. [

The winning wakeboard further includes a screw 18 for providing a driving force to the board 15 by using the power transmitted through the engine 11 and the control unit 13 and the engine 11. The screw 18 is supported by a screw support shaft 18a and the safety net 17 covers the screw 18 and protects the screw 18 from seaweed or the like. The engine 11 may be a motor or a gasoline / diesel engine capable of providing power to the screw 18, and the control unit 13 controls whether the engine 11 is operated or output.

FIG. 2 is a view showing the handle support, the direction key and the support bracket shown in FIG. 1, and FIG. 3 is a view showing the connection state between the handle support and the support bracket shown in FIG. The board 15 has a board body 15a.

The board body 15a has an opening 15c and a cylindrical support bracket 32 is provided on the opening 15c. The flange 31 connected to the edge of the support bracket 32 is fixed to the upper surface of the board body 15a through a fixture. The cross-sectional area of the upper end of the support bracket 32 is smaller than the cross-sectional area of the lower end, and the cross-sectional area of the point corresponding to 2/3 of the height is smaller than the cross-sectional area of the upper end. It is preferable that the inner circumferential surface of the support bracket 32 is curved so as to minimize damage to the outer circumferential surface of the rotation bracket 70 when the rotation bracket 70 is held in contact with the inner circumferential surface of the support bracket 32 .

The handle support 20 supports the handle 10 and is rotatable with the handle 10 when the handle 10 is rotated. The handle support 20 is connected to the direction key 29 through the inside of the support bracket 32 and the opening 15c and can be pivoted toward the front or rear of the board 15 have.

The handle support 20 can be rotated about the rotation axis 72 of the rotation bracket 70 while being inserted into the rotation bracket 70. [ Specifically, the rotation bracket 70 has a cylindrical shape with an empty interior, and a rotary shaft 72 is protruded from both outer peripheral surfaces. The rotation shaft 72 serves as a reference when the rotation bracket 70 and the handle support 20 rotate and the handle support 20 rotates about the rotation axis 72 while being inserted into the rotation bracket 70. The rotation shaft 72 is inserted into the through hole 32a formed in the side surface of the support bracket 32. [

The rotation of the rotation bracket 70 is restricted by the support bracket 32 since the outer circumferential surface of the rotation bracket 70 is held in contact with the inner circumferential surface of the support bracket 32 as described above.

The occupant can tilt forward or backward according to the speed of the water wakeboard. At this time, since the handle support 20 can be turned toward the front or rear, the occupant can change the boarding posture according to the convenience, You can enjoy the feeling of thrill with speed sense. However, for safety of the occupant, it is preferable that the handle support 20 maintains a tilted state toward the rear. Also, the direction can be changed to the left or right by the direction key 29 connected with the rotation of the handle support 20.

Fig. 4 is a view showing the screw and the adjustment motor shown in Fig. 1, and Fig. 5 is a block diagram showing a control method of the adjustment motor using the handle shown in Fig. 4, the screw support shaft 18a is connected to the motor 28, and the screw 18 is connected to the screw 28 by a motor 28 to rotate the screw 18 and the center line along the longitudinal direction of the board 15 The angle is adjusted.

5, the sensor 101 (for example, an encoder) provided on the handle 10 senses the rotation angle of the handle 10 and transmits it to the control unit 13. The control unit 13 controls the handle 13, The motor 28 is driven in proportion to the rotation angle of the motor 10. Therefore, the direction of the screw 18 can be adjusted through the motor 28, and the occupant can adjust the direction of the water wake board by adjusting the direction of the screw 18 through the handle 10. The turning direction of the handle 10 and the turning direction of the screw 18 may be the same as the turning direction of the handle 10 and the turning direction of the direction key 29 are the same, The direction of rotation and the direction of switching of the winning wakeboard can be matched.

FIG. 6 is a view showing a handle support, an adjustment bar, and a connection bar according to another embodiment of the present invention, and FIG. 7 is a plan view showing the support bracket shown in FIG. The description omitted hereunder can be replaced with the description of the foregoing embodiment. The handle 10 is connected to a direction key 29 via a handle support 20 and a control bar (or an adjustment hinge) 24 and a connecting bar 26. When the handle 10 rotates, So that the traveling direction of the board 15 can be adjusted.

The board 15 has a board body 15a and a lower cover 15b and the lower cover 15b is installed at a lower portion of the board body 15a and between the board body 15a and the lower cover 15b Thereby forming a mounting space. The mounting space may be blocked from the outside and water may not penetrate, and the adjusting bar 24 and the connecting bar 26, which will be described later, may be installed in the mounting space.

The handle support 20 supports the handle 10 and is rotatable with the handle 10 when the handle 10 is rotated. The handle support 20 is connected to the adjustment bar 24 through the inside of the support bracket 32 and the opening 15c and is rotatable with reference to the adjustment bar 24. As shown in Figure 6, (The rotation bracket 70 can be omitted if necessary). As described above, since the outer circumferential surface of the handle support 20 is held in contact with the inner circumferential surface of the support bracket 32, the rotation of the handle support 20 is limited by the support bracket 32. [

FIG. 8 is a view showing a direction bar and a screw provided on a transfer bar / operation bar, a screw support shaft and a screw support shaft connected to the connection bar shown in FIG. 6, and FIGS. 9 to 11 are cross- And the state of the connection bar and the transmission bar / operation bar according to the state.

9 to 11, when the handle 10 is operated, the handle supporter 20, the adjusting bar 24, and the connecting bar 26 rotate about the hinge center h. Similarly, the transfer bar 19 rotates about the hinge center h, and the guide protrusion 19a provided on the transfer bar 19 is inserted into the guide slot 26a formed along the longitudinal direction of the connecting bar 26 And is movable along the guide slot 26a. The operating bar 39 rotates about the hinge center h and the operating protrusion 19b provided on the transfer bar 19 is inserted into the operating slot 39a formed along the longitudinal direction of the operating bar 39 And is movable along the operation slot 39a.

10, when the handle 10 is rotated to rotate clockwise, the transfer bar 19 rotates counterclockwise while the guide protrusion 19a moves along the guide slot 26a, As the projection 19b moves along the operating slot 26b, the operating bar 39 rotates clockwise. Conversely, when the handle 10 is rotated counterclockwise as shown in Fig. 11, the guide bar 19 is rotated clockwise as the guide protrusion 19a moves along the guide slot 26a , The operating bar 39 rotates counterclockwise as the operating projection 19b moves along the operating slot 26b. Through such a method, the operating bar 39 can be operated by operating the handle 10. Fig.

The screw supporting shaft 18a is connected to the operating bar 39 and rotates together with the operating bar 39. [ The direction key 29 and the screw 18 are provided on the screw supporting shaft 18a and rotate together with the operating bar 39 to be disposed in the same direction as the operating bar 39, Can be adjusted.

Fig. 12 is a variation showing a direction key and a screw provided on the transmission bar and the screw support shaft and the screw support shaft shown in Fig. 8, and Figs. 13 to 15 show the state of the transfer bar according to the state of the handle shown in Fig. Fig. 13, when the winning wake board goes straight, the connection bar 26 and the transmission bar 19 are arranged in parallel to each other, and the wires w are arranged in '11 characters' And the transfer bar 19, respectively. When the handle 10 is operated, the connecting bar 26 rotates about the hinge center h, and likewise, the transfer bar 19 rotates about the hinge center h.

As shown in Figs. 14 and 15, when the connecting bar 26 is rotated by operating the handle 10, one end of the transfer bar 19 is pulled by the wire w, And rotates in the same direction as the connecting bar 26. Through this method, the handlebar 10 can be operated to operate the transfer bar 19. [

The screw supporting shaft 18a is connected to the transfer bar 19 and rotates together with the transfer bar 19. [ The direction key 29 and the screw 18 are provided on the screw supporting shaft 18a and rotate together with the transfer bar 19 to be disposed in the same direction as the transfer bar 19, Can be adjusted.

16 is a view showing a modified example of the handle support shown in Fig. As shown in Fig. 16, the handle support 20 includes a support bar 20a which is hollow and an adjustment bar 20b which is inserted into the support bar 20a. The support bar 20a is connected to the control bar 24 and the control bar 20b is inserted into the support bar 20a and is movable along the longitudinal direction of the support bar 20a. The fixture 20c is inserted through a fixing hole (not shown) formed in the side surface of the supporting bar 20a to restrict the movement of the adjusting bar 20b by pressing the adjusting bar 20b. Accordingly, the length of the handle support 20 can be adjusted by adjusting the position of the adjustment bar 20b.

17 is a view showing a modified example of the handle shown in Fig. The handle 10 may include an operation switch 112a and a shift switch 112b provided on the grips 112 and 114 and the grips 112 and 114, respectively. The operation switch 112a is electrically connected to the control unit 13 and transmits a signal for on / off of the engine 11. The shift switch 112b is electrically connected to the control unit 13, Signal to the output. The rider can adjust the speed of the winning wakeboard by adjusting the output of the engine 11 via the shift switch 112b as well as adjusting the operation of the engine 11 via the operation switch 112a.

Figs. 18 and 19 are views showing a rotating state of a rotating plate fixed to the support bracket shown in Fig. 1. Fig. 18 and 19, the board body 15a has an opening, and the rotary plate 140 is installed on the opening so as to be rotatable through the hinge structure to open and close the opening of the board body 15a . The rotating plate 140 has an opening 142 and the handle support 20 can be connected to the adjusting bar 24 through the opening 142 as described above.

The board 15 has an installation groove 120 formed inside the board body 15a and communicating with the opening and the stopper 131 is mounted in the installation groove 120. The stopper 131 is provided with a fixing portion 133 having a slope 134 inclined downwardly downward at the tip thereof and the elastic body 135 applies an elastic force to the stopper 131 in a direction toward the rotating plate 140 to provide. The stopper 131 is connected to the wire 137 passing through the through hole 130 and can be retracted.

The occupant can operate the separate lever (not shown) to pull the wire 137, so that when the stopper 131 is reversed, the rotary plate 140 can rotate about the hinge structure. 19, the rotary plate 140 can be disengaged from the opening of the board body 15a, and the handle support 20 can be rotated backward beyond the state shown in Fig. 2 And the occupant can enjoy the sense of speed by adjusting the position of the handle support 20 to change the boarding posture. The stopper 131 is inserted into the fixing groove formed in the side surface of the rotating plate 140 so that the rotating plate 140 is moved from the opening of the board body 15a Can be prevented from being separated.

20 is a view showing the structure bar shown in Fig. As shown in FIGS. 1 and 20, a 'C' shaped cradle 81 is formed at the rear end of the board 15, and the structural bar 82 is connected to a wire (or rope) 83 are wound on the base 81. The structure bar 82 is connected to the board 15 through the wire 83 in a state where the structure 83 is removed from the cradle 81 and the wire 83 is loosened.

Although the present invention has been described in detail by way of preferred embodiments thereof, other forms of embodiment are possible. Therefore, the technical idea and scope of the claims set forth below are not limited to the preferred embodiments.

10: handle 11: engine
13: control unit 19: transfer bar
15: board 17: safety net
18: screw 29: direction key
20: handle support 24: adjustment bar
26: Connection bar 28: Motor
32: support bracket 131: stopper
140: Spindle

Claims (5)

Boards mounted on the surface of water and movable by propulsion;
A screw installed on an upper surface or a lower surface of the board to provide the driving force;
A direction key provided at a lower portion of the board to guide a traveling direction of the board;
A handle support connected to the direction key and rotatable together with the direction key, the handle support being rotatable toward the front or rear of the board;
A power providing device for providing power to the screw;
A handle fixed to an upper end of the handle support and to which an operation switch for adjusting the operation of the power providing device and a shift switch for adjusting the output of the power providing device are fixed; And
And a cylindrical support bracket installed in an opening formed in the board and penetrating by the handle support and supporting an outer peripheral surface of the handle support. The method according to claim 1,
And the direction key is fixed to the lower end of the handle support. The method according to claim 1,
The winning wakeboard includes:
A connection bar installed at a lower portion of the board and rotatable together with the handle support;
A transfer bar installed at a lower portion of the board and rotatable about a hinge fixed at the center; And
A wire connecting the connection bar and the transmission bar in an eleven character form to rotate the transmission bar in the same direction as the rotation direction of the connection bar;
Further comprising a screw support shaft mounted on the transfer bar and rotatable together with the transfer bar, wherein the screw and the direction key are fixed. The method according to claim 1,
The winning wakeboard includes:
A connection bar installed at a lower portion of the board and rotatable together with the handle supporter and having guide slots formed along the length thereof;
An operation bar installed at a lower portion of the board and rotatable and having an operation slot formed along the longitudinal direction;
A guide protrusion inserted into the guide slot is installed at one side and an operation protrusion inserted into the operation slot is installed at the other side so that the connection bar rotates around the hinge, The guide protrusion is moved along the guide slot and the operation protrusion moves along the operation slot to rotate the operation bar in the same direction as the rotation direction of the connection bar; And
Further comprising a screw support shaft mounted on the operation bar and rotatable together with the operation bar, wherein the screw and the direction key are fixed. The method according to claim 1,
The board having an opening formed to be recessed from the top surface,
The winning wakeboard includes:
A rotating plate fixed to the support bracket and connected to the board so as to be rotatable to open and close the opening by pivoting; And
Further comprising a structural bar connected to a rear surface of the board.
KR1020160011382A 2016-01-29 2016-01-29 Water wake board KR20170090702A (en)

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Cited By (6)

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CN109229327A (en) * 2018-10-17 2019-01-18 青岛昊运船艇制造有限公司 The mechanical two places operating system of ships and light boats
WO2019050570A1 (en) * 2016-09-12 2019-03-14 Kai Concepts, LLC Watercraft device with hydrofoil and electric propeller system
US10946939B1 (en) 2020-04-22 2021-03-16 Kai Concepts, LLC Watercraft having a waterproof container and a waterproof electrical connector
US11485457B1 (en) 2021-06-14 2022-11-01 Kai Concepts, LLC Hydrojet propulsion system
US11878775B2 (en) 2021-07-13 2024-01-23 Kai Concepts, LLC Leash system and methods of use
US11897583B2 (en) 2020-04-22 2024-02-13 Kai Concepts, LLC Watercraft device with hydrofoil and electric propulsion system

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019050570A1 (en) * 2016-09-12 2019-03-14 Kai Concepts, LLC Watercraft device with hydrofoil and electric propeller system
US10597118B2 (en) 2016-09-12 2020-03-24 Kai Concepts, LLC Watercraft device with hydrofoil and electric propeller system
US11919608B2 (en) 2016-09-12 2024-03-05 Kai Concepts, LLC Watercraft device with hydrofoil and electric propeller system
CN109229327A (en) * 2018-10-17 2019-01-18 青岛昊运船艇制造有限公司 The mechanical two places operating system of ships and light boats
US10946939B1 (en) 2020-04-22 2021-03-16 Kai Concepts, LLC Watercraft having a waterproof container and a waterproof electrical connector
US11091232B1 (en) 2020-04-22 2021-08-17 Kai Concepts, LLC Watercraft having a waterproof container and a waterproof electrical connector
US11801919B2 (en) 2020-04-22 2023-10-31 Kai Concepts, LLC Waterproof container having a waterproof electrical connector
US11897583B2 (en) 2020-04-22 2024-02-13 Kai Concepts, LLC Watercraft device with hydrofoil and electric propulsion system
US11485457B1 (en) 2021-06-14 2022-11-01 Kai Concepts, LLC Hydrojet propulsion system
US11878775B2 (en) 2021-07-13 2024-01-23 Kai Concepts, LLC Leash system and methods of use

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