Ships – Sail or control means therefor – Reefing and furling
Patent
1994-11-11
1996-02-27
Sotelo, Jesus D.
Ships
Sail or control means therefor
Reefing and furling
B63H 904
Patent
active
054939887
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an arrangement for a driving device for sails on a boat and comprises a worm gear acting between the driving device and a sail furling stay and/or a sail furling shaft on the mast.
BACKGROUND OF THE INVENTION
In previously disclosed driving arrangements for the mechanical furling and unfurling of sails on boats, the arrangement is bulky because it is attached either longitudinally to the driving device, i.e. in such a way that an hydraulically or electrically powered motor, for example, is connected to the screw of a worm gear at one end, or laterally because of drive motors and worm gear screws arranged in parallel with one another at the transmission device. The presence of such projecting parts close to the mast and/or stays on boats has been found to be a major disadvantage, since they have often presented the risk of injury to crew members as they pass by. The mass of the arrangement can also be considerable.
U.S. Pat. No. 3,608,511 shows a boom turning device comprising a worm gear mechanism in which a crank hole in a worm screw is intended to accommodate the end of a crank for driving the arrangement when turning the sails, whilst GB A 2,226,800 shows a sail driving arrangement which, likewise with a driving unit in the form of an electric motor, is accommodated with one part in a worm gear screw, more specifically in the gear casing.
The principal object of the present invention is thus, in the first instance, to make available a solution to this problem using simple and effectively functioning means.
Said object is achieved by means of an arrangement in accordance with the present invention, which is characterized essentially in that the driving device, which consists of an hydraulic motor, is capable of being accommodated with at least one part in an internal space in the screw of the worm gear.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention is described below as a preferred illustrative embodiment, in conjunction with which reference is made to the drawings, in which
FIGS. 1 and 2 illustrate schematically examples of a previously disclosed driving arrangement for a foresail, shown respectively from the side and from above;
FIG. 3 illustrates schematically an example of a driving arrangement in accordance with the present invention on the mast of a boat, shown looking across the longitudinal sense of the mast;
FIG. 4 shows the basic arrangement in accordance with the present invention;
FIGS. 5-6 show side views of drive arrangements in accordance with the invention;
FIG. 7 shows a schematic sectioned view of the driving arrangement, essentially along the line VII--VII in FIG. 5, and
FIG. 8 shows a sectioned view along the line VIII--VIII in FIG. 7.
DETAILED DESCRIPTION OF THE INVENTION
An arrangement 1 for a driving device 2 for sails 3, 4 on a boat 5 comprising a worm gear 6, which is intended and so arranged as to be capable of acting between the intended driving device 2 and an intended sail furling shaft, more specifically a sail furling stay 7 and/or a sail furling shaft 8 on a mast 9, has said driving device 2 so arranged as to be capable of being accommodated internally within said worm gear 6.
The driving device, which consists of an hydraulic motor 2, which exhibits an output drive shaft 10, preferably at its one front end 2A, is so arranged, preferably in its entirety, but at least in some part, as to be accommodated in an internal space 11 within the screw 12 of said worm gear.
In the illustrative embodiment of the invention shown in the drawings, the driving end 10 of the hydraulic motor with its shaft is capable of being introduced into an internal and preferably transcurrent axially extending cavity 13 in said screw 12 in order to interact with a drive transmission part 14, for example a keyed joint, etc., in the worm gear screw arranged internally within the cavity 13. In this way torsional power transmission moment can be transmitted from the hydraulic motor 2 via the drive shaft 10 to the screw 12 at its one end 12A. Retention of the hyd
REFERENCES:
patent: 3608511 (1971-09-01), Katshen
patent: 4061101 (1977-12-01), Cook
patent: 4924795 (1990-05-01), Ottemann
Selden Mast AB
Sotelo Jesus D.
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