Ships – Watercraft with means used in providing sailpower – Having specifically defined hull shape
Patent
1988-11-25
1990-07-03
Peters, Jr., Joseph F.
Ships
Watercraft with means used in providing sailpower
Having specifically defined hull shape
114 91, B63B 3500
Patent
active
049381610
ABSTRACT:
An improved hoisting apparatus for a sailboard rig of the type which is attached to a sailboard with a universal connection, the improved hoisting apparatus comprising a hoist pole with a bottom end and a top end, an attachment connecting the bottom end of the hoist pole to the mast to provide pivotable and rotational movement of the hoist pole with respect to the mast, a halyard including first and second tension members extending from the top end of the hoist pole, the first tension member connected to the boomhead, the second tension member having a graspable end portion for exerting a force on the hoist pole to hoist the rig, and elastic cord members connected to return the hoisting apparatus to a stowage position when the graspable end portion is released. A third tension member connects the bottom end of the hoist pole to the boomhead so as to transfer the axial force component on the hoist pole caused by hoisting forces to the boomhead, thereby requiring the bottom end attachment to sustain only transverse force components. In one embodiment, the first and second tension members are furnished by a single uphaul passing freely through a guide ring in the top end of the hoist pole.
REFERENCES:
patent: 4498411 (1985-02-01), Marker
Crutcher William C.
Peters Jr. Joseph F.
Sotelo Jesus D.
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