Ships – Watercraft with means used in providing sailpower – Having specifically defined hull shape
Patent
1994-11-21
1996-11-19
Avila, Stephen
Ships
Watercraft with means used in providing sailpower
Having specifically defined hull shape
114109, B63B 3500
Patent
active
055752292
ABSTRACT:
Tackle is provided to enable control of sail outhaul with one hand, while holding a windsurfing sail rig with the other. To avoid the use of jam cleats, pulleys and bungies, 3:1 ring cinches are used. A 3:1 ring cinch assembly is attached to right and left booms of the rig's wishbone boom. These are then attached to the ends of a clew line, which is part of 2:1 tackle from the boomtail to the outhaul grommet at the clew of the sail. The cinch line has four parts: (1) an anchor-part for a ring and a finder tab, (2) a pull-part for increasing sail outhaul, (3) a release-part for decreasing sail outhaul and (4) a cinch-part for pinching two cinch rings against the release-part while sharing the outhaul load with the pull and release parts. Through rigging geometry, the ring cinch pinch provides a self-energizing lock on the cinch line such that no slip can occur without a positive pull on the pull-part or release part. A tug line connects the ring cinches to a loop-cleat which, in turn, connects the 3:1 cinch assembly to the clew line.
REFERENCES:
patent: 4530299 (1985-07-01), Ross
patent: 4646670 (1987-03-01), Jamieson
patent: 5095838 (1992-03-01), Smith
Avila Stephen
Crutcher William C.
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