GB2238025A - Rigid hull boat with buoyancy members - Google Patents
Rigid hull boat with buoyancy members Download PDFInfo
- Publication number
- GB2238025A GB2238025A GB8925684A GB8925684A GB2238025A GB 2238025 A GB2238025 A GB 2238025A GB 8925684 A GB8925684 A GB 8925684A GB 8925684 A GB8925684 A GB 8925684A GB 2238025 A GB2238025 A GB 2238025A
- Authority
- GB
- United Kingdom
- Prior art keywords
- boat
- buoyancy members
- members
- buoyancy
- cover sheet
- 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
Links
- 239000000463 material Substances 0.000 claims abstract description 17
- 230000001413 cellular effect Effects 0.000 claims abstract description 5
- 238000000465 moulding Methods 0.000 claims description 9
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000011151 fibre-reinforced plastic Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 239000011324 bead Substances 0.000 claims description 2
- 239000002023 wood Substances 0.000 claims description 2
- 230000001419 dependent effect Effects 0.000 claims 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B43/00—Improving safety of vessels, e.g. damage control, not otherwise provided for
- B63B43/02—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking
- B63B43/10—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving buoyancy
- B63B43/14—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving buoyancy using outboard floating members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B5/00—Hulls characterised by their construction of non-metallic material
- B63B5/24—Hulls characterised by their construction of non-metallic material made predominantly of plastics
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
A boat having a rigid hull structure provided on its outer side with buoyancy members (18, 20) formed of a cellular material and which are held to the hull structure (10) by outer flexible cover sheets (19, 21) which are secured to the hull structure (10) by securing means (22, 23, 25, 29), the buoyancy members (18, 20) giving the hull of the boat its desired external shape. <IMAGE>
Description
RIGID HULL BOAT WITH BUOYANCY MEMBERS
This invention relates to a boat of the type comprising a rigid hull structure provided with buoyancy members.
According to the present invention there is provided a boat comprising a rigid hull structure provided with buoyancy members, said buoyancy members comprising members formed of a cellular material which are located on the outer side of the hull structure and held thereto by an outer flexible cover sheet secured to the rigid hull structure.
Preferably the buoyancy members comprise members which are positioned around the sides of the hull structure and members which are positioned on an underside part of the hull structure and the flexible cover sheets form the external surfaces of the boat.
The buoyancy members preferably comprise a foamed plastics material, such as foamed polyethylene, although other suitable cellular materials can be used.
The rigid hull structure is preferably formed of a fibre reinforced plastics material, such as a glass fibre reinforced resin.
The outer cover sheet may comprise a pvc impregnated cloth.
An embodiment of the present invention will now be described, by way of an example, with reference to the accompanying drawings, in which:
Figure 1 is a diagrammatic perspective view of a boat according to the present invention, partly in section;
Figure 2 is a transverse cross-section taken along the line 2-2 indicated on Figure 1; and
Figure 3 is a cross-section through an alternative method of fixing the cover sheets to the hull structure.
The boat shown in Figures 1 and 2 has a rigid hull structure 10 which is moulded from a fibre reinforced plastics material, such as a glass fibre reinforced resin. The hull structure 10 comprises a main moulding 11 which has a peripheral side wall 12 which is preferably slightly inclined outwardly at an angle of, for example, three degrees. The side wall 12 is provided at its upper end with an outwardly extending flange 13. The main hull moulding 11 also comprises an inner moulding 15 which stiffens the main moulding 11 particularly in torsion.
The rigid hull structure 10 may be formed of any other suitable material, such- as wood or metal, for example aluminium.
The inner moulding 15 has attached to it an upright structure 16 on which a steering wheel 17 is mounted.
Located on the outer side of the side wall 12 are buoyancy members 18 which are provided with a groove 18a in which the flange 13 is received so as to prevent the buoyancy members 18 moving upwardly or downwardly relative to the side wall 12. The buoyancy members 18 are formed of a cellular material such as a foamed plastics material. Preferably the buoyancy members are formed of a foamed polyethylene material. The buoyancy members 18 are held in position against the hull structure 10 by an outer flexible cover sheet 19.
Located on the underside of the hull structure 10 are further buoyancy members 20 which may be formed of the same type of material as the buoyancy members 18.
The buoyancy members 20 are held in position by an outer flexible cover sheet 21.
The flexible cover sheets 19 and 21 preferably comprise a pvc impregnated cloth, such as a cloth formed of Nylon (Registered Trade Mark), but other suitable materials can be used.
The cover sheets 19 are secured along one edge to the hull structure 10 by plates or fixing strips 22 and are secured along the other edge by tensioning devices 23 which engage with a tube or rod 24 which extends along the inboard edge of each cover sheet 19 and is secured thereto. In use, the tubes or rods 24 conveniently form a hand rail.
The cover sheets 21 are secured along both edges by plates or fixing strips 25. The rear ends of the cover sheets 19 and 21 are tailored to fit around the rear end of the respective buoyancy members 18, 20. The ends of the cover sheets 21 are provided with slits 26 which allow any water which gets between the buoyancy members 20 and the cover sheets 21 to escape. The slits 26 become closed by the water pressure acting against the outer side of the cover sheets 21 when the boat is in the water. The slits 26 can be replaced by nonreturn valve members.
The buoyancy members 18, 20 can extend in one piece along the length of the hull structure 10 but preferably they are formed in sections placed end to end. The buoyancy members 20 are suitably shaped to give the desired shape to the underside of the hull.
At the bow end of the boat the cover sheets 19 are secured together, such as by lacing, and the join is covered by a flexible cover sheet 27.
It is possible for the cover sheets 19 and 21 to be in one piece.
As shown in Figure 3 the bottom edge of the cover sheet 19 may be provided with a bead 28 which is received in a gap formed between the hull structure 10 and an L-shaped metal strip 29. The metal strip 29 also engages the edge of the cover sheet 21 and is fixed to the hull structure 10 by screws. The strip 29 may be formed of aluminium or an aluminium alloy.
The cross-section of the buoyancy members 18 is shaped such that their centre of buoyancy is higher than that of buoyancy members having a circular crosssection.
It will be seen that the buoyancy members 18 and 20, together with the cover sheets 19, 21 give the hull of the boat its desired external shape. If a cover sheet 19, 21 is punctured, the boat has sufficient buoyancy to remain afloat even though water may be trapped between the cover sheets 19, 21 and the buoyancy members 18, 20.
It will be appreciated that the edges of the cover sheets 19, 21 may be secured to the hull structure 10 by any other suitable means.
Claims (17)
1. A boat comprising a rigid hull structure provided with buoyancy members, said buoyancy members comprising members formed of a cellular material which are located on the outer side of the hull structure and held thereto by an outer flexible cover sheet secured to the rigid hull structure.
2. A boat as claimed in claim 1, in which the buoyancy members comprise buoyancy members which are positioned around the sides of the hull structure and buoyancy members which are positioned on an underside part of the hull structure and the flexible cover sheet forms the external surface of the hull of the boat.
3. A boat as claimed in claim 1 or claim 2, in which the buoyancy members are formed of a foamed plastics material.
4. A boat as claimed in claim 3, in which the plastics material comprises foamed polyethylene.
5. A boat as claimed in any preceding claim, in which the rigid hull structure is formed of a plastics material, or metal, or wood.
6. A boat as claimed in any preceding claim, in which the cover sheet comprises a pvc impregnated cloth.
7. A boat as claimed in any preceding claim, in which the hull is provided with a peripheral side wall having an outwardly extending flange and buoyancy members are provided which contact the peripheral side wall and which extend above the flange, said buoyancy members being provided with a groove in which the outwardly extending flange is received.
8. A boat as claimed in any preceding claim, in which the buoyancy members are formed in sections placed end to end.
9. A boat as claimed in any preceding claim, in which means are provided for tensioning at least part of the flexible cover sheet.
10. A boat as claimed in claim 5 and any one of claims 6 to 9 when dependent upon claim 5, in which the hull structure is formed of a fibre reinforced plastics material and comprises a main moulding and an inner moulding which stiffens the main moulding.
11. A boat as claimed in claim 10, in which the inner moulding has an upright flange to which internal structure or fittings can be attached.
12. A boat as claimed in claim 2 and any one of claims 3 to 11 when dependent upon claim 2, in which the buoyancy members positioned around the sides of the hull are held thereto by a first cover sheet and the buoyancy members positioned on an underside part of the hull are held thereto by a second cover sheet.
13. A boat as claimed in claim 12, in which the sheets are held to the hull structure by fixing strips or by fixing members provided with a channel in which a bead provided on a cover sheet is received.
14. A boat as claimed in claim 12 or claim 13, in which at the bow end of the hull the cover sheets are secured together and the joint is covered by a further flexible sheet.
15. A boat as claimed in any preceding claim, in which the buoyancy members are shaped in cross-section such that their centre of buoyancy is higher than a buoyancy member of circular cross-section.
16. A boat as claimed in any preceding claim, in which at the stern end of the boat the cover sheet or sheets is/are provided with slits or non-return valve members to allow any water which gets between the buoyancy members and the cover sheet or sheets to escape.
17. A boat comprising a rigid hull structure provided with buoyancy members substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8925684A GB2238025B (en) | 1989-11-14 | 1989-11-14 | Rigid hull boat with buoyancy members |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8925684A GB2238025B (en) | 1989-11-14 | 1989-11-14 | Rigid hull boat with buoyancy members |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8925684D0 GB8925684D0 (en) | 1990-01-04 |
| GB2238025A true GB2238025A (en) | 1991-05-22 |
| GB2238025B GB2238025B (en) | 1993-09-01 |
Family
ID=10666261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8925684A Expired - Fee Related GB2238025B (en) | 1989-11-14 | 1989-11-14 | Rigid hull boat with buoyancy members |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2238025B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2717768A1 (en) * | 1994-03-24 | 1995-09-29 | Brabetz Philippe Georges Mauri | Non-submersible, self-emptying and non-burstable boat |
| WO2001098138A1 (en) * | 2000-06-21 | 2001-12-27 | Tiger Marine Ltd | Boat |
| US7775172B2 (en) | 2006-06-06 | 2010-08-17 | Safe Boats International L.L.C. | Foam stabilized watercraft with finned collar |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4287624A (en) * | 1979-02-14 | 1981-09-08 | Lowther Lou Y | Auxiliary flotation gear for fishing boats |
-
1989
- 1989-11-14 GB GB8925684A patent/GB2238025B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4287624A (en) * | 1979-02-14 | 1981-09-08 | Lowther Lou Y | Auxiliary flotation gear for fishing boats |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2717768A1 (en) * | 1994-03-24 | 1995-09-29 | Brabetz Philippe Georges Mauri | Non-submersible, self-emptying and non-burstable boat |
| WO2001098138A1 (en) * | 2000-06-21 | 2001-12-27 | Tiger Marine Ltd | Boat |
| US7775172B2 (en) | 2006-06-06 | 2010-08-17 | Safe Boats International L.L.C. | Foam stabilized watercraft with finned collar |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2238025B (en) | 1993-09-01 |
| GB8925684D0 (en) | 1990-01-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19981114 |