CA1082051A - Canoe shell structure - Google Patents
Canoe shell structureInfo
- Publication number
- CA1082051A CA1082051A CA282,775A CA282775A CA1082051A CA 1082051 A CA1082051 A CA 1082051A CA 282775 A CA282775 A CA 282775A CA 1082051 A CA1082051 A CA 1082051A
- Authority
- CA
- Canada
- Prior art keywords
- shell
- canoe
- blocks
- glass fibre
- mold
- 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.)
- Expired
Links
Classifications
-
- 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)
- Moulding By Coating Moulds (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A canoe shell is made of resin impregnated glass fibre in a split mold with flotation chambers formed along each side just below the gunwales. After removal from the mold, pre-formed flotation blocks of expanded foam such as polyurethane are inserted into the chambers with the opening vent being sealed with a cover of resin impregna-ted glass fibre cloth. Pre-formed expanded foam blocks are also inserted in the nose and stern and sealed into place in a similar manner.
A canoe shell is made of resin impregnated glass fibre in a split mold with flotation chambers formed along each side just below the gunwales. After removal from the mold, pre-formed flotation blocks of expanded foam such as polyurethane are inserted into the chambers with the opening vent being sealed with a cover of resin impregna-ted glass fibre cloth. Pre-formed expanded foam blocks are also inserted in the nose and stern and sealed into place in a similar manner.
Description
--BACKGROUND OF THE INVENTION I
This invention relate~s~to new ~Fuseful improve-ments in the manufacture of glass fibre canoes. -Many glass fibre canoes are manufactured, some ;-~
with the square stern design so as to accept a small motor to propel the vessel and others in the conventional shape with a substantially pointed nose and stern con-struction.
All of them suffer from the principal disadvan-tage that they are relatively unstable and while experien-ced canoeists rarely run into trouble, the popularity of the glass fibre canoe is such that families and relatively unskilled personnel have considerable difficulty in main-. _ taining equilibrium as such canoes are readily overturned. .
.
While most canoes have flotation devices in each end of the canoe, the weight of one person on one end of ..
' .
. . , ' - ' : ' . .:
. .
- . , -IO~;~OSl the canoe makes it difficult for a second or third person to achieve safety by holding on to another sec-tion of an overturned canoe.
In recent years, stabilizers have been manufac-tured which can be attached to the sides of the canoeshell. However, these stabilizers may readily become damaged or the fastening devices can come loose.
SUMMARY OF THE INVENTION
The present invention overcomes these disadvan-tages inherent with canoe construction inasmuch as flota-tion stabilizers form an integral part of the shell and cannot be detached.
One aspect of the invention consists of a method of manufacturing a canoe from resin impregnated glass fi-bre material comprising the steps of securing a longitudi- ~ -nal split mold together having flotation chambers forming portions extending longitudinally of each side of the mold just below the gunwale lines thereof, installing a gel coat of resin over the interior surface of the mold, lay-ing up at least one layer of resin impregnated glass fibre cloth over the gel coat to form the canoe shell, splitting said mold and removing the mold from the canoe shell, in-serting pre-formed rigid expanded foam blocks into the ~- -flotation chambers formed in said canoe shell and then sealing the flotation chambers with at least one layer of resin impregnated glass fibre cloth.
.~0~;~051 Another aspect of the invention is to provide a shell of resin impregnated glass fibre comprising in combination a main canoe shell and a longitudinally ex-tending flotation chamber formed integrally along each side of said shell adjacent the gunwales of said shell.
A yet further object of the invention is to provide a device of the character herewithin described which is simple in construction, economical in manufac-ture and otherwise well suited to the purpose for which it is designed.
With the foregoing objects in view, and other such objects and advantages as will become apparent to those skilled in the art to which this invention relates as this specification proceeds, my invention consists es-sentially in the arrangement and construction of partsall as hereinafter more particularly described, refer-ence being had to the accompanying drawings in which:-DESCRIPTION OF_THE DRAWINGS
Figure 1 is a top plan view of the finished canoe.
Figure 2 is a side elevation of Figure 1.
Figure 3 is a cross sectional view of the split 1~ 051mold used in the construction of the canoe.
Figure ~ is an enlarged fragmentary cross sec-tional view of one half of the finished canoe shell.
Figure 5 is an isometric view of the pre-formed flotation block for the nose and stern of the shell.
Figure 6 is a fragmentary isometric view of the pre-formed block for the flotation stabilizer.
In the drawings like characters of reference ~
indicate corresponding parts in the different figures. ~-DETAILED DESCRIPTION
Before proceeding with the detailed description, ~;
it should be noted that conventional glass fibre construc-tion methods are uti]ized and that the measurements and constructional details given in the following specifica-tion are exemplary only and should not be considered limiting.
Proceeding therefore to describe the invention ~-in detail, reference character 10 illustrates a canoe shell which, when completed, includes longitudinally ex-tending flotation chambers 11, one upon each side of the ~0~;Z051 shell and situated on the outer surface thereof spaced just below the gunwales 12.
Aluminium or glass fibre end caps 13 are secu-red to each end of the shell and cross members 14 may be constructed of wood or glass fibre materials.
The passenger seats 15 are preferably formed from glass fibre material, but of course can be formed from wood if desired.
Figure 3 shows a cross sectional view of a split ~ -mold 16. It comprises the two halves 16A and 16B which are detachably secured together via bolted flanges 17 with each half including a lower keel portion 18 as -clearly shown.
Flotation chamber forming portions 19 are formed along each side of the two halves spaced below the gun-wale line 20 of the molds and of course, a release agent (not illustrated) is applied to the interior of the mold before forming the canoe shell.
The method of forming the shell comprises the steps of securing the two mold halves together, applying the necessary release agent and then a polyester gel coat (not illustrated) approximately 14 mm. thick, is applied ::
to the interior of the mold in the usual manner.
One layer of 1 1/2 ounce fibreglass mat saturated with polyester resin in then laid up or applied to the gel coated surface followed by a layer of 24 oz. woven roving material also saturated with resin, is applied to form the finished interior of the canoe shell.
The bolts holding the two halves together are now removed and the mold is split by means of air cylinders -~
(not illustrated) or similar means so that the glass fibre canoe shell can be lifted free from the mold.
Pre-formed blocks of a rigid foam such as polyure-thane foam are formed in the configuration similar to that illustrated in Figure 6 and identified by reference character 21. These pre-formed blocks are inserted into the flotation chambers 11 whereupon a 1 1/2 oz. layer of polyester resin impregnated fibreglass mat 22 is applied over the openings 11 thus sealing the chambers with the foam blocks therein as clearly shown in Figure 4.
If desired, pre-formed end blocks 23 are formed of similar rigid foam material and these are inserted at each end of the canoe and sealed into place along the line illus-trated by the dotted line 24, in a manner similar to that hereinbefore described for the foam blocks 21.
- . . -~ lO~OSl The canoe is then finished with the addition of the parts 13, 14 and 15 as hereinbefore described, thus pro-viding an extremely safe canoe structure in which the flota-tion portions cannot be removed or become detached.
S It should be stressed that the split mold is essen-tial for the formation of the chambers 11 as an integral part of the canoe shell and these chambers are molded of the same material as the remainder of the shell.
Chambers are preferably filled with 2 pound density urethane foam or the equivalent.
.
The result is to provide a canoe which has much greater flotation characteristics and safety features than existing canoe shell structures.
Finally it should be appreciated that the flotation chamkers can, if desired, be filled with flotation material by foaming in place under which circumstances the foaming should be done while the shell is still in the mold so that the mold can lend support to the shell during this operation.
Since various modifications can be made in my inven-tion as hereinabove described, and many apparently widely dif-ferent embodiments of same made within the spirit and scope of 1(~8;~051 the claims without departing from such spirit and scope, it is intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.
This invention relate~s~to new ~Fuseful improve-ments in the manufacture of glass fibre canoes. -Many glass fibre canoes are manufactured, some ;-~
with the square stern design so as to accept a small motor to propel the vessel and others in the conventional shape with a substantially pointed nose and stern con-struction.
All of them suffer from the principal disadvan-tage that they are relatively unstable and while experien-ced canoeists rarely run into trouble, the popularity of the glass fibre canoe is such that families and relatively unskilled personnel have considerable difficulty in main-. _ taining equilibrium as such canoes are readily overturned. .
.
While most canoes have flotation devices in each end of the canoe, the weight of one person on one end of ..
' .
. . , ' - ' : ' . .:
. .
- . , -IO~;~OSl the canoe makes it difficult for a second or third person to achieve safety by holding on to another sec-tion of an overturned canoe.
In recent years, stabilizers have been manufac-tured which can be attached to the sides of the canoeshell. However, these stabilizers may readily become damaged or the fastening devices can come loose.
SUMMARY OF THE INVENTION
The present invention overcomes these disadvan-tages inherent with canoe construction inasmuch as flota-tion stabilizers form an integral part of the shell and cannot be detached.
One aspect of the invention consists of a method of manufacturing a canoe from resin impregnated glass fi-bre material comprising the steps of securing a longitudi- ~ -nal split mold together having flotation chambers forming portions extending longitudinally of each side of the mold just below the gunwale lines thereof, installing a gel coat of resin over the interior surface of the mold, lay-ing up at least one layer of resin impregnated glass fibre cloth over the gel coat to form the canoe shell, splitting said mold and removing the mold from the canoe shell, in-serting pre-formed rigid expanded foam blocks into the ~- -flotation chambers formed in said canoe shell and then sealing the flotation chambers with at least one layer of resin impregnated glass fibre cloth.
.~0~;~051 Another aspect of the invention is to provide a shell of resin impregnated glass fibre comprising in combination a main canoe shell and a longitudinally ex-tending flotation chamber formed integrally along each side of said shell adjacent the gunwales of said shell.
A yet further object of the invention is to provide a device of the character herewithin described which is simple in construction, economical in manufac-ture and otherwise well suited to the purpose for which it is designed.
With the foregoing objects in view, and other such objects and advantages as will become apparent to those skilled in the art to which this invention relates as this specification proceeds, my invention consists es-sentially in the arrangement and construction of partsall as hereinafter more particularly described, refer-ence being had to the accompanying drawings in which:-DESCRIPTION OF_THE DRAWINGS
Figure 1 is a top plan view of the finished canoe.
Figure 2 is a side elevation of Figure 1.
Figure 3 is a cross sectional view of the split 1~ 051mold used in the construction of the canoe.
Figure ~ is an enlarged fragmentary cross sec-tional view of one half of the finished canoe shell.
Figure 5 is an isometric view of the pre-formed flotation block for the nose and stern of the shell.
Figure 6 is a fragmentary isometric view of the pre-formed block for the flotation stabilizer.
In the drawings like characters of reference ~
indicate corresponding parts in the different figures. ~-DETAILED DESCRIPTION
Before proceeding with the detailed description, ~;
it should be noted that conventional glass fibre construc-tion methods are uti]ized and that the measurements and constructional details given in the following specifica-tion are exemplary only and should not be considered limiting.
Proceeding therefore to describe the invention ~-in detail, reference character 10 illustrates a canoe shell which, when completed, includes longitudinally ex-tending flotation chambers 11, one upon each side of the ~0~;Z051 shell and situated on the outer surface thereof spaced just below the gunwales 12.
Aluminium or glass fibre end caps 13 are secu-red to each end of the shell and cross members 14 may be constructed of wood or glass fibre materials.
The passenger seats 15 are preferably formed from glass fibre material, but of course can be formed from wood if desired.
Figure 3 shows a cross sectional view of a split ~ -mold 16. It comprises the two halves 16A and 16B which are detachably secured together via bolted flanges 17 with each half including a lower keel portion 18 as -clearly shown.
Flotation chamber forming portions 19 are formed along each side of the two halves spaced below the gun-wale line 20 of the molds and of course, a release agent (not illustrated) is applied to the interior of the mold before forming the canoe shell.
The method of forming the shell comprises the steps of securing the two mold halves together, applying the necessary release agent and then a polyester gel coat (not illustrated) approximately 14 mm. thick, is applied ::
to the interior of the mold in the usual manner.
One layer of 1 1/2 ounce fibreglass mat saturated with polyester resin in then laid up or applied to the gel coated surface followed by a layer of 24 oz. woven roving material also saturated with resin, is applied to form the finished interior of the canoe shell.
The bolts holding the two halves together are now removed and the mold is split by means of air cylinders -~
(not illustrated) or similar means so that the glass fibre canoe shell can be lifted free from the mold.
Pre-formed blocks of a rigid foam such as polyure-thane foam are formed in the configuration similar to that illustrated in Figure 6 and identified by reference character 21. These pre-formed blocks are inserted into the flotation chambers 11 whereupon a 1 1/2 oz. layer of polyester resin impregnated fibreglass mat 22 is applied over the openings 11 thus sealing the chambers with the foam blocks therein as clearly shown in Figure 4.
If desired, pre-formed end blocks 23 are formed of similar rigid foam material and these are inserted at each end of the canoe and sealed into place along the line illus-trated by the dotted line 24, in a manner similar to that hereinbefore described for the foam blocks 21.
- . . -~ lO~OSl The canoe is then finished with the addition of the parts 13, 14 and 15 as hereinbefore described, thus pro-viding an extremely safe canoe structure in which the flota-tion portions cannot be removed or become detached.
S It should be stressed that the split mold is essen-tial for the formation of the chambers 11 as an integral part of the canoe shell and these chambers are molded of the same material as the remainder of the shell.
Chambers are preferably filled with 2 pound density urethane foam or the equivalent.
.
The result is to provide a canoe which has much greater flotation characteristics and safety features than existing canoe shell structures.
Finally it should be appreciated that the flotation chamkers can, if desired, be filled with flotation material by foaming in place under which circumstances the foaming should be done while the shell is still in the mold so that the mold can lend support to the shell during this operation.
Since various modifications can be made in my inven-tion as hereinabove described, and many apparently widely dif-ferent embodiments of same made within the spirit and scope of 1(~8;~051 the claims without departing from such spirit and scope, it is intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.
Claims
WHAT I CLAIM AS MY INVENTION IS:
(1) A method of manufacturing a canoe from resin impregnated glass fibre material comprising the steps of se-curing a longitudinal split mold together having flotation chambers forming portions extending longitudinally of each side of the mold just below the gunwale lines thereof, install-ing a gel coat of resin over the interior surface of the mold, laying up at least one layer of resin impregnated glass fibre cloth over the gel coat to form the canoe shell, splitting said mold and removing the mold from the canoe shell, insert-ing pre-formed rigid expanded foam blocks into the floatation chambers formed in said canoe shell and then sealing the flo-tation chambers with at least one layer of resin impregnated glass fibre cloth.
(2) The method according to Claim 1 which includes the additional step of inserting pre-formed rigid expanded foam blocks in the nose and stern of the canoe shell and seal-ing said blocks into position with at least one layer of resin impregnated glass fibre cloth.
(3) A shell of resin impregnated glass fibre cloth comprising in combination a main canoe shell and a longitudinal-ly extending flotation chamber formed integrally along each side of said shell outboard of said main canoe shell and adjacent to but spaced at a level below the gunwales of said shell.
(4) The shell according to Claim 3 which in-cludes pre-formed blocks of rigid cellular foam within said flotation chambers and means to seal said blocks therein.
(5) The shell according to Claim 3 which in-cludes pre-formed blocks of rigid cellular foam in the nose and stern of the said shell and means to seal said blocks therein.
(6) The shell according to Claim 4 which in-cludes pre-formed blocks of rigid cellular foam in the nose and stern of the said shell and means to seal said blocks therein.
(1) A method of manufacturing a canoe from resin impregnated glass fibre material comprising the steps of se-curing a longitudinal split mold together having flotation chambers forming portions extending longitudinally of each side of the mold just below the gunwale lines thereof, install-ing a gel coat of resin over the interior surface of the mold, laying up at least one layer of resin impregnated glass fibre cloth over the gel coat to form the canoe shell, splitting said mold and removing the mold from the canoe shell, insert-ing pre-formed rigid expanded foam blocks into the floatation chambers formed in said canoe shell and then sealing the flo-tation chambers with at least one layer of resin impregnated glass fibre cloth.
(2) The method according to Claim 1 which includes the additional step of inserting pre-formed rigid expanded foam blocks in the nose and stern of the canoe shell and seal-ing said blocks into position with at least one layer of resin impregnated glass fibre cloth.
(3) A shell of resin impregnated glass fibre cloth comprising in combination a main canoe shell and a longitudinal-ly extending flotation chamber formed integrally along each side of said shell outboard of said main canoe shell and adjacent to but spaced at a level below the gunwales of said shell.
(4) The shell according to Claim 3 which in-cludes pre-formed blocks of rigid cellular foam within said flotation chambers and means to seal said blocks therein.
(5) The shell according to Claim 3 which in-cludes pre-formed blocks of rigid cellular foam in the nose and stern of the said shell and means to seal said blocks therein.
(6) The shell according to Claim 4 which in-cludes pre-formed blocks of rigid cellular foam in the nose and stern of the said shell and means to seal said blocks therein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA282,775A CA1082051A (en) | 1977-07-15 | 1977-07-15 | Canoe shell structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA282,775A CA1082051A (en) | 1977-07-15 | 1977-07-15 | Canoe shell structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1082051A true CA1082051A (en) | 1980-07-22 |
Family
ID=4109139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA282,775A Expired CA1082051A (en) | 1977-07-15 | 1977-07-15 | Canoe shell structure |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1082051A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5042416A (en) * | 1990-06-18 | 1991-08-27 | Pierre Arcouette | One-boater watercraft |
| FR2717768A1 (en) * | 1994-03-24 | 1995-09-29 | Brabetz Philippe Georges Mauri | Non-submersible, self-emptying and non-burstable boat |
| ES2188379A1 (en) * | 2001-06-04 | 2003-06-16 | Promociones Criguima S L | Fabrication of baths via a mould consists of coating of gel coat with glass fibre layers with impregnation by resin, in the mould |
| US11008438B2 (en) * | 2016-12-02 | 2021-05-18 | Composite Technologies International, Llc | Composition and method to form a composite core material |
-
1977
- 1977-07-15 CA CA282,775A patent/CA1082051A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5042416A (en) * | 1990-06-18 | 1991-08-27 | Pierre Arcouette | One-boater watercraft |
| FR2717768A1 (en) * | 1994-03-24 | 1995-09-29 | Brabetz Philippe Georges Mauri | Non-submersible, self-emptying and non-burstable boat |
| ES2188379A1 (en) * | 2001-06-04 | 2003-06-16 | Promociones Criguima S L | Fabrication of baths via a mould consists of coating of gel coat with glass fibre layers with impregnation by resin, in the mould |
| US11008438B2 (en) * | 2016-12-02 | 2021-05-18 | Composite Technologies International, Llc | Composition and method to form a composite core material |
| US11760862B2 (en) | 2016-12-02 | 2023-09-19 | Composite Technologies International, Llc | Composite panel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |