Mast for a sailboard

Details Mast for a sailboard Mast for a sailboard

1987-09-14

1989-05-02

Peters, Jr., Joseph F.

Ships

Spars

Masts and masting

441 74, 267 6428, B63B 1502

Patent

active

048257923

ABSTRACT:
To counteract stress peaks on a sailboard exerted by the bottom end of the mast, this bottom end is provided with a shock absorber formed by an oil filled cylinder and a piston with piston rod displaceable therein. The piston is provided with passages. The flow of oil through these passages is governed by valve means.

REFERENCES:
patent: 4073254 (1978-02-01), Marker
patent: 4462327 (1984-07-01), Petramer
patent: 4493659 (1985-01-01), Iwashita
patent: 4529180 (1985-07-01), Hill
patent: 4593890 (1986-06-01), van der Laarse
patent: 4646884 (1987-03-01), Yang

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