Ships – Sail or control means therefor – Reefing and furling
Patent
1997-05-27
1998-08-04
Avila, Stephen
Ships
Sail or control means therefor
Reefing and furling
114105, B63H 904
Patent
active
057878307
ABSTRACT:
A track slide intended to be moved along a track, particularly a mast or boom, having a groove with an enlarged inner portion and a narrow slot defined by two opposite walls of the track. The slide comprises a central profiled member having an enlarged inner portion for being received in the enlarged inner portion of the groove and a shaft portion for extending through the slot. Furthermore the slide comprises a roller member for coacting with the outer face of the opposite side walls on each side of the groove. The roller member is formed of a plurality of roller bodies arranged to rotate freely in a circumferential continuous path with an outwardly open, longitudinal slot and a return passage on each side of the central profiled member. The use of freely rotating roller bodies ensures a relatively small rolling resistance in all situations, even if the slide should tilt in a relation to the track. Moreover, the plurality of roller bodies ensures that the load on the wall portion, on which the roller bodies roll, is within an acceptable level.
REFERENCES:
patent: 4452164 (1984-06-01), Dejager
patent: 4692037 (1987-09-01), Kasai
patent: 5127351 (1992-07-01), Breems
patent: 5191851 (1993-03-01), Rutgerson
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