EP0572786A1 - Gabelbaum-Kopfstück - Google Patents

Gabelbaum-Kopfstück Download PDF

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Publication number
EP0572786A1
EP0572786A1 EP93106349A EP93106349A EP0572786A1 EP 0572786 A1 EP0572786 A1 EP 0572786A1 EP 93106349 A EP93106349 A EP 93106349A EP 93106349 A EP93106349 A EP 93106349A EP 0572786 A1 EP0572786 A1 EP 0572786A1
Authority
EP
European Patent Office
Prior art keywords
insert
mast
head piece
boom head
bellows
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.)
Withdrawn
Application number
EP93106349A
Other languages
German (de)
English (en)
French (fr)
Inventor
Matthias Ocklenburg
Holger Bramsiepe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
North Sails Windsurfing GmbH
Original Assignee
North Sails Windsurfing GmbH
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
Application filed by North Sails Windsurfing GmbH filed Critical North Sails Windsurfing GmbH
Publication of EP0572786A1 publication Critical patent/EP0572786A1/de
Withdrawn legal-status Critical Current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
    • 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 relates to a boom head piece, consisting of a front piece connecting the boom spars with a fastening device encompassing the mast, an insert being provided between the mast and the fastening device.
  • the "reaching around" the mast is to be understood in such a way that the fastening device either encloses the mast continuously or, in some areas, engages and engages behind it so that the boom head piece can be fixed immovably on the mast.
  • the boom head pieces commonly found have a lever with which the fastening device of the head piece is tensioned around the mast can be.
  • the fastening device can, for example, be a cuff which is closed around the mast by inserting a locking projection at one end of the cuff into a correspondingly shaped receiving opening of the other cuff end, different mast diameters being taken into account in that several receiving openings in the circumferential direction the cuff are spaced apart.
  • An elastic insert can be provided between the mast and the cuff (DE-GM 89 07 449).
  • the fastening device has a rope, which is placed, for example, around a hook-shaped projection of a mast receiving shell of a boom head piece before it is tensioned by the lever being flipped over.
  • the insertion of the tamp in the hook-shaped projection is quite cumbersome, and the effective rope length must also be adjusted to the respective mast diameter.
  • the invention has for its object to design a boom head piece of the type mentioned so that it is easier and more convenient to use and that a continuous adjustment to the respective mast diameter is made possible in a simple manner.
  • the boom head piece according to the invention contains an expandable insert which, when a pressure medium is supplied, produces the tensioning force which immovably fixes the head piece to the mast.
  • the boom head piece has a cuff which can be closed around the received mast by suitable means.
  • the insert is expediently on the inner wall fastens the cuff and is supported on it.
  • the cuff is first loosely closed around the mast so that it can still be moved on the mast in this state, whereupon the volume of the insert is increased so that the mast between the insert - possibly with the interposition of an additional protective insert - and the opposite one Area of the cuff is clamped.
  • the boom head piece according to the invention encompasses the mast with a cuff that can be opened and closed
  • a rope as a fastening device, which leads around the mast and, for example, into a hook of the mast receiving shell is inserted.
  • the mast is pressed against the rope when the insert is widened and is thus fixed in principle in the same way as is the case when a cuff is used.
  • bars and similar components engaging behind the mast can also be provided, against which the mast can be pressed by increasing the volume of the insert.
  • the expandable insert is connected to a pump, and it is particularly preferred that the insert is inflatable with air.
  • the pump is advantageously designed as a bellows, on which a user of the boom head piece according to the invention presses so often until the insert is inflated so firmly that the head piece sits immovably on the mast. This process is quick and easy, can be carried out without exertion of force and, in contrast to the application and tensioning of conventional head pieces, requires no particular skill.
  • a liquid instead of air as a pressure medium, which is pumped from a liquid source into the insert by means of a pump in order to expand it.
  • the arrangement can then be made such that this liquid can flow back into the liquid receiving container after opening a valve.
  • the air that is pumped into the insert in the preferred embodiment of the invention until the mast is clamped within the cuff can be easily deflated by actuating an exposed vent valve of the insert, thereby returning the headpiece to a loose fit on the mast.
  • the headpiece can be moved to a different position on the mast, whereupon it can be fixed again by repeatedly actuating the bellows.
  • the fastening device can be easily opened in order to remove the head piece from the mast.
  • the bellows is expediently housed in a form-fitting recess in the front part of the boom head piece outside the cuff and is exposed to the top of the front piece, so that a user can easily press the bellows with his thumb.
  • the boom head piece shown in FIGS. 1 and 2 contains a sleeve 1 which is attached to the front piece 2, which is connected to the two side rails 3 of a boom, as indicated in FIG.
  • an inflatable insert 5 which consists of a hollow body which is adapted to the inside wall of the cuff and has an arcuate shape in plan and extends over the entire axial length of the cuff.
  • the insert can be fastened to the cuff by means of molded-on knobs 6, the knobs 6 latching into correspondingly shaped recesses 7 in the inner wall of the cuff 1.
  • the insert is covered on the surface facing the mast by an additional protective insert 17.
  • the inflatable insert can be made relatively thin-walled so that it is easily inflatable.
  • the protective insert 17 can have a profile in the form of ribs and can be detachably or permanently connected to the inflatable insert.
  • a crescent-shaped bellows 8 is provided for inflating the insert 5.
  • the bellows 8 has an inlet valve 9 through which air is sucked in when there is a negative pressure in the bellows 8 after it has been compressed.
  • the bellows 8 is connected to the inflatable insert 5 via a line 10, a non-return valve permitting the passage of air from the bellows 8 into the insert 5, but not in the opposite direction.
  • the insert 5 also has an outlet valve 11 with an outwardly projecting valve body 12. When the valve body 12 is pressed into the valve 11, air flows out of the insert 5.
  • the bellows 8 has an inner surface 13 which corresponds to the contour of the associated outer surface of the insert 5, so that the crescent-shaped bellows 8 can be attached to the insert 5 in the manner shown in FIG. 2.
  • the arrangement consisting of bellows 8 and insert 5 is inserted into the head piece, as indicated by arrow 14 in FIG. 2.
  • the bellows 8 is received in a trough-shaped recess 15 of the front piece 2, while the inflatable insert 5 - apart from the area to which the bellows 8 is attached, is supported on the inner wall of the cuff 1, the knobs 6 in the Engage recesses 7.
  • the bellows 8 lies with its underside on the bottom of the trough-shaped recess 15, while its exposed upper surface is flush with the adjacent front piece surface, so that the bellows 8 does not in any way impair the appearance of the boom head piece.
  • the cuff 1 is first loosely closed around the mast by a toothing 16 engaging on the other side of the cuff. The user then presses several times — for example with his thumb — on the upper side of the bellows 8, as a result of which this is compressed in the trough-shaped recess 15. This process is repeated until the cuff 1 is tight enough to grip around.
  • the user presses in the valve body 12, as a result of which the air escapes from the insert 5.
  • the cuff 1 can be opened without any problems since its closure is not under tension.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Tents Or Canopies (AREA)
EP93106349A 1992-06-02 1993-04-20 Gabelbaum-Kopfstück Withdrawn EP0572786A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4218137A DE4218137C1 (enrdf_load_stackoverflow) 1992-06-02 1992-06-02
DE4218137 1992-06-02

Publications (1)

Publication Number Publication Date
EP0572786A1 true EP0572786A1 (de) 1993-12-08

Family

ID=6460206

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93106349A Withdrawn EP0572786A1 (de) 1992-06-02 1993-04-20 Gabelbaum-Kopfstück

Country Status (2)

Country Link
EP (1) EP0572786A1 (enrdf_load_stackoverflow)
DE (1) DE4218137C1 (enrdf_load_stackoverflow)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB795689A (en) * 1954-10-30 1958-05-28 Augsburgi Nuernberg Ag Maschf Improvements in and relating to the releasable fixing by frictional connection of a machine part which is displaceable with respect to a guiding part
US2989328A (en) * 1958-07-18 1961-06-20 Koppers Co Inc Air operated keys
DE8907449U1 (de) * 1989-06-19 1989-08-03 North Sails Windsurfing GmbH, 8122 Penzberg Manschette

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB795689A (en) * 1954-10-30 1958-05-28 Augsburgi Nuernberg Ag Maschf Improvements in and relating to the releasable fixing by frictional connection of a machine part which is displaceable with respect to a guiding part
US2989328A (en) * 1958-07-18 1961-06-20 Koppers Co Inc Air operated keys
DE8907449U1 (de) * 1989-06-19 1989-08-03 North Sails Windsurfing GmbH, 8122 Penzberg Manschette

Also Published As

Publication number Publication date
DE4218137C1 (enrdf_load_stackoverflow) 1993-09-16

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

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Designated state(s): FR IT NL

17P Request for examination filed

Effective date: 19940426

17Q First examination report despatched

Effective date: 19950413

18D Application deemed to be withdrawn

Effective date: 19950822