Patent US4556003A successfully refreshed from Google Patents.
US4556003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sailboard and a process for producing the same
Assignee: Mistral Windsurfing AG
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Filing: 1984-08-07
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Granted: 1985-12-03
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Expires: 2004-08-07
Abstract
Abstract The present invention is with respect to craft such as surfboards and more specially sailboards made up of a board body of synthetic resin foam and with a synthetic resin shell and having fittings such as a daggerboard case, mast foot sleeves or sockets, connection points for foot straps, skegs etc. The sailboard is made up of a base element having all the fittings on it. The top part of a skin-compatible, flexible light-weight synthetic resin or plastic is fixed on the base element. All mechanical forces are taken up by the base element while the greater part of the buoyant volume is formed by the top part. The top part may more specially be so designed that it may be taken off the base element and an other one put in its place.
Inventors
- 👤 Ernstfried Prade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:41
CPC Classifications
B; B63; B63B; B63B32/00; B63B32/57; B63B32/40; B63B32/50
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
133 words
In a sailboard having a board body of synthetic resin and synthetic resin foam and fittings joined to the board body, said board body comprising: a one piece lower part having a hard outer face and being in the form of a generally stiff base element of a material with a high mechanical strength, the fittings being joined to the base element such that all mechanical forces thereof are taken up by the base element; and a top part engageable with said lower part and being composed of a flexible, light-weight synthetic resin material such that said top part presents an upper exposed surface of said flexible, light-weight resin material said top part having most of the buoyancy of the sailboard compared with the lower part said lower part being generally less buoyant.
Claim 2
Dependent Claim
133 words
In a sailboard having a board body of synthetic resin and synthetic resin foam and fittings joined to the board body, said board body comprising: a one piece lower part having a hard outer face and being in the form of a generally stiff base element of a material with a high mechanical strength, the fittings being joined to the base element such that all mechanical forces thereof are taken up by the base element; and a top part engageable with said lower part and being composed of a flexible, light-weight synthetic resin material such that said top part presents an upper exposed surface of said flexible, light-weight resin material said top part having most of the buoyancy of the sailboard compared with the lower part said lower part being generally less buoyant.
Claim 3
Dependent Claim
26 words
A sailboard as claimed in claim 1, wherein the base element has an upwardly running middle backbone integral therewith, the fittings being mounted on said backbone.
Claim 4
Dependent Claim
16 words
A sailboard as claimed in claim 1 having at least one stringer on said base element.
Claim 5
Dependent Claim
23 words
A sailboard as claimed in claim 1 having, as part of the base element at the stern of the sailboard, a bridge-like structure.
Claim 6
Dependent Claim
13 words
A sailboard as claimed in claim 4, wherein said bridge-like structure is hollow.
Claim 7
Dependent Claim
15 words
A sailboard as claimed in claim 5 having an inflatable balloon within said bridge-like part.
Claim 8
Dependent Claim
16 words
A sailboard as claimed in claim 5, wherein said bridge-like structure is filled with foam material.
Claim 9
Dependent Claim
19 words
A sailboard as claimed in claim 5, having support ribs in a space bridged over by said bridge-like structure.
Claim 10
Dependent Claim
18 words
A sailboard as claimed in claim 1 wherein said base element is made of deep-drawn ABS sheet material.
Claim 11
Dependent Claim
17 words
A sailboard as claimed in claim 1 wherein said base element is made of a polyethylene-foam-sandwich material.
Claim 12
Dependent Claim
17 words
A sailboard as claimed in claim 1, wherein said base element is made of polyurethane integral foam.
Claim 13
Dependent Claim
16 words
A sailboard as claimed in claim 1 wherein said base element is made up of SMC.
Claim 14
Dependent Claim
20 words
A sailboard as claimed in claim 1 wherein said base element is made up at least in part of wood.
Claim 15
Dependent Claim
17 words
A sailboard as claimed in claim 1 wherein said top part is made of a skin-compatible material.
Claim 16
Dependent Claim
36 words
A sailboard as claimed in claim 1, wherein said top part is so joined to said base element that said top part may be taken off and its place taken by an other such top part.
Claim 17
Dependent Claim
24 words
A sailboard as claimed in claim 1 wherein generally the complete top of the sailboard is covered by said top part over the waterline.
Claim 18
Dependent Claim
38 words
A sailboard as claimed in claim 4 wherein a forward part of said sailboard is covered by said top part whereas an aft area, generally forming the foot area for the board-sailor, is formed by said bridge-like structure.
Claim 19
Dependent Claim
34 words
A sailboard as claimed in claim 1 wherein said base element is in the form of a flexible base slab having connection structures for joining reinforcing structures of different forms to the base slab.
Claim 20
Dependent Claim
14 words
A sailboard as claimed in claim 18 in which said reinforcement structures are stringers.
Claim 21
Dependent Claim
22 words
A sailboard as claimed in claim 18 in which said reinforcement structures are ribs stretching in the forward-aft direction of said sailboard.
Claim 22
Dependent Claim
133 words
A process for producing a sailboard having a board body of synthetic resin and synthetic resin foam and fittings joined to the board body, comprising joining a one piece lower part, having a hard outer face and being in the form of a generally stiff base element of a material with high mechanical strength, the fittings being joined to the base element such that all mechanical forces thereof are taken up by the base element, to a top part engageable with said lower part and being composed of a flexible, light-weight synthetic resin material such that the top part presents an upper exposed surface of said flexible, light-weight resin material, said top part having most of the buoyancy of the sailboard compared with the lower part, said lower part being generally less buoyant.
Claim 23
Dependent Claim
133 words
A process for producing a sailboard having a board body of synthetic resin and synthetic resin foam and fittings joined to the board body, comprising joining a one piece lower part, having a hard outer face and being in the form of a generally stiff base element of a material with high mechanical strength, the fittings being joined to the base element such that all mechanical forces thereof are taken up by the base element, to a top part engageable with said lower part and being composed of a flexible, light-weight synthetic resin material such that the top part presents an upper exposed surface of said flexible, light-weight resin material, said top part having most of the buoyancy of the sailboard compared with the lower part, said lower part being generally less buoyant.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-02 | 1989-06-03 | 1989-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-02 | 1993-06-03 | 1993-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-02 | 1997-06-03 | 1997-12-03 | $7700.00 | Window Closed / Lapsed |