WO1987000503A1 - Boom and boomhead for windsurfer - Google Patents
Boom and boomhead for windsurfer Download PDFInfo
- Publication number
- WO1987000503A1 WO1987000503A1 PCT/DK1986/000082 DK8600082W WO8700503A1 WO 1987000503 A1 WO1987000503 A1 WO 1987000503A1 DK 8600082 W DK8600082 W DK 8600082W WO 8700503 A1 WO8700503 A1 WO 8700503A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- boom
- boomhead
- mast
- jaws
- joint
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H8/00—Sail or rigging arrangements specially adapted for water sports boards, e.g. for windsurfing or kitesurfing
- B63H8/20—Rigging arrangements involving masts, e.g. for windsurfing
- B63H8/22—Rigging arrangements involving masts, e.g. for windsurfing for connecting wishbones to the mast
Definitions
- the invention concerns a boom and a boomhead for a windsurfer, the boom consisting of two arms which in one end - possibly demountably - are attached to a boomhead, consisting of two jaws, which are designed for clutching a mast and are mutually connected by a joint, flexible like a hinge connection.
- This joint might be designed as a hinge connection or an elastic piece of metal or plastic.
- Such a windsurfer boom and boomhead are known from PCT publication no. WO 79/01078.
- the joint of the boomhead is placed in front of the jaws, i.e. opposite the part of the boomhead attached to or designed for attachment to the boom arms.
- the joint of the boomhead is placed on the side of the mast, opposite the boom arms.
- the boom of this known invention will- when stressed - tend to pull the end of the boom opposite the boomhead towards the mast and against the elasticity of the boom arms. This causes the boom arms to be pressed outwards (their curvature increases), resulting in a reduced pressure of the jaws against the mast.
- a disadvantage of the known technique is thus that the strength of the attachment of the boom against the mast will decrease just as increasing wind force calls for more strength of the attachment.
- fig. 1 shows boom and sail mounted on a mast
- fig. 2 shows the known bomhead construction, seen from above,
- FIGURE 1 shows the boomhead according to the invention, also seen from above.
- FIGURE 1 shows the boomhead according to the invention, also seen from above.
- the rig consists of a mast (1), placed in a casing at the front edge of a sail (2).
- a boom (4) In the casing of the sail (2) there is an opening (3) designed for attachment of a boom (4) to the mast (1).
- the boom (4) consists of a boomhead (5) placed against the mast and of two boom arms (6 and 7) in the front end attached to the boomhead (5), and in the rear end to a mounting (11), to which the sail (2) is fastened.
- the boom (4) thus encircles the mast (1) and the sail (2).
- the boom according to PCT publication no. WO 79/01078 consists of two boom arms (6 and 7), each connected to a jaw (8 and 9). Between the jaws (8 and 9) a mast (1) is held in position. In front of the mast (1), the jaws (8 and 9) are connected by a joint (10).
- the boom according to the invention consists of two boom arms (6 and 7), each connected to a jaw (8 and 9). Between the jaws (8 and 9), a mast (1) is held in position. Behind the mast (1), the jaws (8 and 9) are connected by a joint (10) flexible like a hinge connection.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Jib Cranes (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8686904789T DE3666205D1 (en) | 1985-07-17 | 1986-07-17 | Boom and boomhead for windsurfer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK323985A DK152980C (en) | 1985-07-17 | 1985-07-17 | WINDSURFER BOM AND BOOM HEADS THEREOF |
DK3239/85 | 1985-07-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1987000503A1 true WO1987000503A1 (en) | 1987-01-29 |
Family
ID=8120650
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DK1986/000082 WO1987000503A1 (en) | 1985-07-17 | 1986-07-17 | Boom and boomhead for windsurfer |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0230465B1 (en) |
AU (1) | AU6221586A (en) |
DE (1) | DE3666205D1 (en) |
DK (1) | DK152980C (en) |
WO (1) | WO1987000503A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2604143A1 (en) * | 1986-09-19 | 1988-03-25 | Attey Graeme | CONTROL BOARD FOR A SAILBOARD AND CONNECTION FOR FIXING SUCH A BOAT |
EP0272463A1 (en) * | 1986-11-21 | 1988-06-29 | McGregor, Garth Bruce | Sailboard boom |
DE3721325A1 (en) * | 1987-06-27 | 1989-01-05 | Rainer Buck | Connecting device between the mast and wishbone boom of windsurfing equipment |
GB2232140A (en) * | 1989-05-20 | 1990-12-05 | Peter Stuart Spencer | Wishbone boom mast collar for a sailboard |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU599148B2 (en) * | 1986-09-19 | 1990-07-12 | Graeme Scott Attey | Sailboard boom end fittings and sailboard boom systems |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2456662A1 (en) * | 1979-05-18 | 1980-12-12 | Shark Wassersport | Mast connector for formed wind surfer boom - has V=shaped head releasably and rotatably fitting peripheral groove in bush fixed on mast |
-
1985
- 1985-07-17 DK DK323985A patent/DK152980C/en active
-
1986
- 1986-07-17 AU AU62215/86A patent/AU6221586A/en not_active Abandoned
- 1986-07-17 WO PCT/DK1986/000082 patent/WO1987000503A1/en active IP Right Grant
- 1986-07-17 DE DE8686904789T patent/DE3666205D1/en not_active Expired
- 1986-07-17 EP EP86904789A patent/EP0230465B1/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2456662A1 (en) * | 1979-05-18 | 1980-12-12 | Shark Wassersport | Mast connector for formed wind surfer boom - has V=shaped head releasably and rotatably fitting peripheral groove in bush fixed on mast |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2604143A1 (en) * | 1986-09-19 | 1988-03-25 | Attey Graeme | CONTROL BOARD FOR A SAILBOARD AND CONNECTION FOR FIXING SUCH A BOAT |
EP0272463A1 (en) * | 1986-11-21 | 1988-06-29 | McGregor, Garth Bruce | Sailboard boom |
DE3721325A1 (en) * | 1987-06-27 | 1989-01-05 | Rainer Buck | Connecting device between the mast and wishbone boom of windsurfing equipment |
GB2232140A (en) * | 1989-05-20 | 1990-12-05 | Peter Stuart Spencer | Wishbone boom mast collar for a sailboard |
Also Published As
Publication number | Publication date |
---|---|
DK152980C (en) | 1988-10-24 |
DK323985D0 (en) | 1985-07-17 |
DK152980B (en) | 1988-06-06 |
AU6221586A (en) | 1987-02-10 |
EP0230465A1 (en) | 1987-08-05 |
EP0230465B1 (en) | 1989-10-11 |
DK323985A (en) | 1987-01-18 |
DE3666205D1 (en) | 1989-11-16 |
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