GB2247443A - Water craft having a bow facing rowing arrangement - Google Patents

Water craft having a bow facing rowing arrangement Download PDF

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Publication number
GB2247443A
GB2247443A GB9019042A GB9019042A GB2247443A GB 2247443 A GB2247443 A GB 2247443A GB 9019042 A GB9019042 A GB 9019042A GB 9019042 A GB9019042 A GB 9019042A GB 2247443 A GB2247443 A GB 2247443A
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United Kingdom
Prior art keywords
craft
water
oar
oars
shaped
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.)
Granted
Application number
GB9019042A
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GB9019042D0 (en
GB2247443B (en
Inventor
Alan Williams
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Individual
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Individual
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
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Priority to GB9019042A priority Critical patent/GB2247443B/en
Publication of GB9019042D0 publication Critical patent/GB9019042D0/en
Publication of GB2247443A publication Critical patent/GB2247443A/en
Application granted granted Critical
Publication of GB2247443B publication Critical patent/GB2247443B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • B63H16/00—Marine propulsion by muscle power
    • B63H16/08—Other apparatus for converting muscle power into propulsive effort
    • B63H16/10—Other apparatus for converting muscle power into propulsive effort for bow-facing rowing

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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

A catamaran 1 is provided with a bow-facing arrangement of rowing oars 2, 3, each oar being shaped so that, in use, pulling forces 4, 5, applied to the oars results in the application of forward propulsive forces 6, 7 to the craft, the forward direction being that which the oarsman is facing. The oars 2, 3 are mounted in rowlocks 20, 21 and can move relative thereto. The rowlocks 20, 21 can move relative to hulls 10, 11 about substantially vertical axes. The looms/shafts 24, 25 of the oars comprise metal tubes of convoluted form shaped so as to obtain forwardly-acting propulsive thrust force by backward pulling movements. The shaft and loom portions are twisted so that the handles 30, 31 of the oars lie in substantially vertical planes which are substantially parallel to the planes containing the oar blades 32, 33. The paths taken by the oar blades 32, 33 are indicated by the dotted lines 34, 35. <IMAGE>

Description

"Improvements in or relating to Water-Craft" This invention relates to water-craft and is also concerned with rowing oars therefor.
According to one aspect of the invention, a water-craft is provided with a pair of rowing oars, each oar being shaped so that in use, a pulling force applied to the oar results in the application of a forward propulsive force to the craft, the forward direction being that which the oarsman is facing.
The water-craft may be of multi-hulled form, and may then comprise a catamaran The water-craft may be of model form.
Another aspect of the invention comprises an oar per se.
The various aspects of the Invention will now be described by way of example only, with reference to the accarrpanying drawings, wherein : Figure 1 is a side elevation of a catamaran form of water craft, Figure 2 is a stern-end view of the craft, Figure 3 is a plan view of the craft, and Figure 4 is a view in perspective of the craft.
With reference to the figures, a catamaran form of water-craft 1 is provided with a pair of rowing oars 2, 3, each oar being shaped so that in use, pulling forces 4, 5, (Figure 3), applied to the oars results in the application of forward propulsive forces 6, 7 to the craft, the forward direction being that which the oarsman is facing.
The water-craft 1 comprises a pair of laterally-spaced hulls 10, 11 interconnected by a flat board 12 which also serves as a support for a seat 13 comprising a back 14 and a footrest 15 mounted on a board 16. The longitudinal axis 17 of the board 12 is inclined at a substantial angle to the longitudinal axis 18 of the water-craft 1.
The oars 2, 3 are mounted in rowlocks 20, 21 and can move relative thereto. The rowlocks 20, 21 can move relative to hulls 10, 11, about substantially vertical axes 22, 23 (Figure 1).
The oars 2, 3, are of similar form. The locms/shafts 24, 25 of the oars comprise metal tubes of convoluted form, see particularly Figures 3 and 4, shaped so as to obtain forwardlyacting propulsive thrust force by backward pulling movements. It will be noted that the shaft and loan portions are twisted so that the handles 30, 31 of the oars lie in substantially vertical planes which are substantially parallel to the planes containing the oar blades 32, 33.
In operation, a person sitting on the seat 13 with his feet on the footrest 15 pulls on the oars 2, 3, so that the leading blade 33 is dragged backwards through the water and the trailing blade 32 is pushed rearwardly through the water. These actions, which are accarmodated by movement within and by the rowlocks 20, 21, result in the application of the propulsive forces 6, 7 to the craft 1, so that the craft is displaced forwardly, in the direction in which the person on the seat 13 is looking, which is obviously advantageous.
The oars 2, 3 are then lifted out of the water, pushing forces opposite to forces 4, 5, are applied to the oars, and the oar blades dipped in the water to repeat the operation.
The paths taken by the oar blades 32, 33 are indicated by the dotted lines 34, 35. (Figure 3).
A water-craft according to the invention may be used as a pleasure boat, or it may be used, for example, as. a tender. It will be noted that the oar blades of the water-craft 1 are inbrd of the hulls 10, 11, and therefore do not hinder positioning of the craft alongside a boat or a jetty.
A small, model-sized version of the water-craft may be produced, using a mechanical and/or electrical actuator to operate the oars.
Such a craft may be radio-controlled.
Single hull, or triple hull forms of the invention may be produced.

Claims (12)

1. A water-craft provided with a pair of rowing oars, each oar being shaped so that, in use, a pulling force applied to the oar results in the application of a forward propulsive force to the craft, the forward direction being that which the oarsman is facing.
2. A water-craft as claimed in claim 1, the craft being of multi-hull form.
3. A water-craft as claimed in claim 2, comprising a catamaran.
4. A water-craft as claimed in claim 1, 2 or 3 wherein the oars are mounted in rowlocks movable about substantially vertical axes.
5. A water-craft as claimed in any one of claims 1 to 4, wherein each oar is of convoluted form, shaped so as to obtain forwardlyacting propulsive thrust force by a backward pulling movement.
6. A water-craft as claimed in claim 5 wherein the shaft/loom portions of the oar are twisted so that the handle of the oar lies in a plane substantially parallel to the plane containing the blade of the oar.
7. A model-sized version of a water-craft as claimed in any one of claims 1 to 6.
8. A model-sized version water-craft as claimed in claim 7, provided with mechanical and/or electrical actuator means for operation of the oars.
9. A radio-controlled model-sized water-craft as claimed in claim 8.
10. A water-craft substantially as hereinbefore described with reference to the accompanying drawings.
11. An oar per se as claimed in claim 5 or 6.
12. An oar as claimed in claim 11, substantially as hereinbefore described with reference to the accompanying drawings.
GB9019042A 1990-08-31 1990-08-31 Improvements in or relating to water-craft Expired - Fee Related GB2247443B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9019042A GB2247443B (en) 1990-08-31 1990-08-31 Improvements in or relating to water-craft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9019042A GB2247443B (en) 1990-08-31 1990-08-31 Improvements in or relating to water-craft

Publications (3)

Publication Number Publication Date
GB9019042D0 GB9019042D0 (en) 1990-10-17
GB2247443A true GB2247443A (en) 1992-03-04
GB2247443B GB2247443B (en) 1994-08-31

Family

ID=10681458

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9019042A Expired - Fee Related GB2247443B (en) 1990-08-31 1990-08-31 Improvements in or relating to water-craft

Country Status (1)

Country Link
GB (1) GB2247443B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2264914A (en) * 1992-03-13 1993-09-15 Masiner Uk Ltd Forward facing rowing racing and training boat
FR2737464A1 (en) * 1995-08-03 1997-02-07 Perenon Joel DEVICE FOR THE MUSCULAR PROPULSION OF LIGHT CRAFT

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB304095A (en) * 1928-05-21 1929-01-17 Emile Devienne Device allowing the rower of a boat to face in the direction in which the boat is moving
US3324490A (en) * 1965-10-21 1967-06-13 Harold A Jewett Bow facing oars and related equipment
US3951095A (en) * 1974-03-15 1976-04-20 Jewett Harold A Crossbar with oar guides for boats having frontward-rowing boat-spanning oars
GB2056930A (en) * 1979-08-22 1981-03-25 Witchell S Rowing equipment
GB2101946A (en) * 1981-06-27 1983-01-26 George Barrie Waugh Oar mounting system
US4776821A (en) * 1987-02-03 1988-10-11 Dupont Stephen Forwards facing hydrofoil oar
GB2209723A (en) * 1987-09-11 1989-05-24 Stanley Paul Witchell Bow-facing rowing arrangement with pivotally mounted inboard end of oar

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB304095A (en) * 1928-05-21 1929-01-17 Emile Devienne Device allowing the rower of a boat to face in the direction in which the boat is moving
US3324490A (en) * 1965-10-21 1967-06-13 Harold A Jewett Bow facing oars and related equipment
US3951095A (en) * 1974-03-15 1976-04-20 Jewett Harold A Crossbar with oar guides for boats having frontward-rowing boat-spanning oars
GB2056930A (en) * 1979-08-22 1981-03-25 Witchell S Rowing equipment
GB2101946A (en) * 1981-06-27 1983-01-26 George Barrie Waugh Oar mounting system
US4776821A (en) * 1987-02-03 1988-10-11 Dupont Stephen Forwards facing hydrofoil oar
GB2209723A (en) * 1987-09-11 1989-05-24 Stanley Paul Witchell Bow-facing rowing arrangement with pivotally mounted inboard end of oar

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2264914A (en) * 1992-03-13 1993-09-15 Masiner Uk Ltd Forward facing rowing racing and training boat
FR2737464A1 (en) * 1995-08-03 1997-02-07 Perenon Joel DEVICE FOR THE MUSCULAR PROPULSION OF LIGHT CRAFT
WO1997006055A1 (en) * 1995-08-03 1997-02-20 Perenon Joel Device for propelling light craft with muscular energy

Also Published As

Publication number Publication date
GB9019042D0 (en) 1990-10-17
GB2247443B (en) 1994-08-31

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Legal Events

Date Code Title Description
746 Register noted 'licences of right' (sect. 46/1977)

Effective date: 20010912

PCNP Patent ceased through non-payment of renewal fee

Effective date: 20020831