GB2353015A - Propulsion and steering device for a water craft - Google Patents

Propulsion and steering device for a water craft Download PDF

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Publication number
GB2353015A
GB2353015A GB9919008A GB9919008A GB2353015A GB 2353015 A GB2353015 A GB 2353015A GB 9919008 A GB9919008 A GB 9919008A GB 9919008 A GB9919008 A GB 9919008A GB 2353015 A GB2353015 A GB 2353015A
Authority
GB
United Kingdom
Prior art keywords
craft
transom
blade
arm
water
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
GB9919008A
Other versions
GB9919008D0 (en
Inventor
Barrie Pimm-Smith
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PIMM SMITH BARRIE
Original Assignee
PIMM SMITH BARRIE
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 PIMM SMITH BARRIE filed Critical PIMM SMITH BARRIE
Priority to GB9919008A priority Critical patent/GB2353015A/en
Publication of GB9919008D0 publication Critical patent/GB9919008D0/en
Publication of GB2353015A publication Critical patent/GB2353015A/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B63H25/06—Steering by rudders
    • B63H25/38—Rudders
    • B63H25/382—Rudders movable otherwise than for steering purposes; Changing geometry
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/30—Propulsive elements directly acting on water of non-rotary type
    • B63H1/36—Propulsive elements directly acting on water of non-rotary type swinging sideways, e.g. fishtail type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H16/00—Marine propulsion by muscle power
    • B63H16/08—Other apparatus for converting muscle power into propulsive effort
    • B63H16/12—Other apparatus for converting muscle power into propulsive effort using hand levers, cranks, pedals, or the like, e.g. water cycles, boats propelled by boat-mounted pedal cycles

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

Abstract

A vertical or horizontal (Fig 4) flexible blade on the end of an arm fixed to the transom of a water craft, wherein propulsion and directional control of said craft is provided by manipulation of said arm. The blade may be constructed of a flexible material such as steel, plywood, fibre reinforced resin, plastic, rubber or rubberised plastic. The arm may be built into the craft, or fixed to the transom by means of a screw clamp. The arm may be adjustable in length, and the distance between the blade and the transom may also be adjustable.

Description

2353015 Propulsion device for water craft.
The present invention relates to a flexible blade that gives forward motion and directional control to a water-craft by to-and-fro movements.
Generally small, non-motorised water-craft movement is controlled by two separate elements, namely: 1) Oars/paddles for forward propulsion. 2) Rudder for direction.
The object of the present invention is to combine these two elements with the use of a flexible blade. This flexible blade device is attached to the transom of a craft, generally in place of the rudder and with the toand-fro movement of the tiller arm creates forward motion, mimicking the function of a fish's tail.
The advantages of this invention are: 1) It eliminates the need for oars or paddles or small outboard motors. 2) It requires no skill, unlike the use of oars. 3) The sailor has better control of the craft due to the forward-looking operating position, unlike rowing with oars. 4) This invention allows for better controlled navigation through narrow channels eg. between other craft in a crowded harbour. 5) Provides a higher degree of safety in that it is fixed to the boat, unlike oars which can be lost overboard leaving the boat with out any means of propulsion.
This invention makes use of the fish-tail principle with a flexible flipper-type blade made out of rubber or flexible plastics, rubberised plastics, steel, plywood, or fibre reinforced resins, which is manoeuvred to-and-fro under water creating forward thrust.
The orientation of the flexible fish-tail device can be either vertical like a conventional rudder or horizontal like the tail of a whale. The vertically oriented device is manipulated with horizontal to-and-fro movement of the tiller. The horizontally oriented device is manipulated with vertical pump action of the tiller arm.
Both variations of the device provide directional control plus forward propulsion by manipulation of the tiller arm.
The fixing of the device to the transom of a water-craft can either be permanently fixed to the craft or detachable, fixed with the use of screw clamps, similar to those used for outboard motors.
The vertically oriented device resembles that of a traditional rudder with a vertical hinge or pivot on the transom of the boat and with a tiller arm of wood or metal. The main difference is that the rudder blade is flexible rather than the rigid blade of a traditional rudder.
The horizontally oriented device has a lever arm which runs approximately from the centre of the craft to the centre of the transom of the boat, where it is fixed with a horizontal pivot or hinge enabling the arm to be pumped up and down. The arm continues past the pivot on the transom bending down below the water surface at which point the flexible horizontal blade is fixed rigidly to the arm.
2 The tiller arm for both variations is adjustable in length within the craft itself as well as an adjustment of the distance of the flexible blade from the transom of the water-craft. These adjustments are both for convenience of manipulation and A specific embodiment of the invention will now be described by way of example with reference to the accompanying drawings in which:
Figure 1. shows in perspective, the manual propulsion device with vertical flexible blade, with the tiller arm fixed by a pivot to the transom of a water craft. The dotted lines indicate the sideways to-and- fro movements of the tiller arm which translates into forward motion by the flexible blade just under the surface of the water.
Figure 2. shows in section, the manual propulsion device with vertical flexible blade, with the tiller arm fixed by a pivot to the transom of a water craft and the flexible blade located just below the surface of the water.
Figure 3. Shows in plan, the manual propulsion device with vertical flexible blade, with the tiller arm fixed by a pivot to the transom of a water-craft. The dotted lines indicate the sideways to-and-fro movements of the tiller arm which translates into forward motion by the flexible blade just under the surface of the water.
Figure 4. shows in perspective, the manual propulsion device with horizontal flexible blade, with the tiller arm fixed by a pivot to the transom of a water craft. The dotted lines indicate the up-and-down movements of the tiller arm which translates into forward motion by the flexible blade under the surface of the water.
Figure 5. shows in section, the manual propulsion device with horizontal flexible blade, with the tiller arm fixed by a pivot to the transom of a water craft and the flexible blade located below the surface of the water. The dotted lines indicate the up and own movement of the tiller arm and the flexible horizontal blade.
Figure 6. Shows in plan, the manual propulsion device with horizontal flexible blade, with the tiller arm fixed by a pivot to the transom of a water craft. The dotted lines indicate the sideways to-and-fro movements of the tiller arm which control the direction of the craft.
3

Claims (4)

1) A vertical or horizontal flexible blade on the end of an arm fixed to the transom of a water-craft, which give forward propulsion and directional control by manipulation of the arm.
2) The vertical or horizontal flexible blade according to claim 1. wherein the blade is constructed of various flexible materials such as steel, plywood, fibre reinforced resins, various plastics, rubber or rubberised plastics.
3) The device according to Claims 1 & 2 wherein the device is built into the craft or detachable being fixed to the transom by means of screw clamp.
4) The manual propulsion device according to Claims 1,2 & 3 wherein the tiller arm is adjustable in its length and in the distance the blade is from the transom of the craft.
GB9919008A 1999-08-13 1999-08-13 Propulsion and steering device for a water craft Withdrawn GB2353015A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9919008A GB2353015A (en) 1999-08-13 1999-08-13 Propulsion and steering device for a water craft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9919008A GB2353015A (en) 1999-08-13 1999-08-13 Propulsion and steering device for a water craft

Publications (2)

Publication Number Publication Date
GB9919008D0 GB9919008D0 (en) 1999-10-13
GB2353015A true GB2353015A (en) 2001-02-14

Family

ID=10859009

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9919008A Withdrawn GB2353015A (en) 1999-08-13 1999-08-13 Propulsion and steering device for a water craft

Country Status (1)

Country Link
GB (1) GB2353015A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1309618C (en) * 2003-08-29 2007-04-11 肖思明 Ship single pendulum paddle propeller
FR3026379A1 (en) * 2014-09-30 2016-04-01 Jean Francois Iglesias PROFILE WING WITH PROGRESSIVE AND SIMULTANEOUS CAMBRIDGE AND INCIDENCE VARIATION

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB239964A (en) * 1924-07-09 1925-09-24 William Loftie Denton Improvements in means for propelling punts, skiffs and the like
GB2044705A (en) * 1979-02-10 1980-10-22 Ramsay Whale N Boat Propulsion and Steering Device
GB2261864A (en) * 1991-11-30 1993-06-02 Richard Andrew Hazelwood Propulsion by self aligning foil
GB2326143A (en) * 1997-02-26 1998-12-16 Padraic Costello A rudder

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB239964A (en) * 1924-07-09 1925-09-24 William Loftie Denton Improvements in means for propelling punts, skiffs and the like
GB2044705A (en) * 1979-02-10 1980-10-22 Ramsay Whale N Boat Propulsion and Steering Device
GB2261864A (en) * 1991-11-30 1993-06-02 Richard Andrew Hazelwood Propulsion by self aligning foil
GB2326143A (en) * 1997-02-26 1998-12-16 Padraic Costello A rudder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1309618C (en) * 2003-08-29 2007-04-11 肖思明 Ship single pendulum paddle propeller
FR3026379A1 (en) * 2014-09-30 2016-04-01 Jean Francois Iglesias PROFILE WING WITH PROGRESSIVE AND SIMULTANEOUS CAMBRIDGE AND INCIDENCE VARIATION

Also Published As

Publication number Publication date
GB9919008D0 (en) 1999-10-13

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)