Ski pole shaft with rotating wing foil

Details Ski pole shaft with rotating wing foil Ski pole shaft with rotating wing foil

1994-01-18

1996-07-23

Boehler, Anne Marie

Land vehicles

Ski or skate appliance or attachment

Ski pole

135 66, 244130, 280821, A63C 1122

Patent

active

055382851

ABSTRACT:
A device for reducing wind resistance or drag on a ski pole shaft comprising a wing foil device rotatably mounted over a significant portion of a cylindrical ski pole shaft for self-aligning rotation about the shaft axis. In one embodiment the wing foil device is an essentially hollow, thin-walled element having a rounded internal bearing surface at its leading edge which rotates on the surface of the shaft. An internal wall or rib structure maintains the primary internal bearing surface against the ski pole shaft and prevents lateral movement or rattle. In a preferred embodiment the top and bottom edges of the wing foil device are angled to be parallel with air flow when the poles are held at a predetermined angle while skiing.

REFERENCES:
patent: 126437 (1872-01-01), Gray
patent: 1408868 (1922-03-01), Dutcher
patent: 2397957 (1946-04-01), Freeman
patent: 4744584 (1988-05-01), Monreal
patent: 4756555 (1988-07-01), Bachmann
patent: 4890861 (1990-01-01), Bachmann
patent: 4921275 (1990-05-01), Santanen et al.
patent: 5203589 (1993-04-01), Tio

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