Method and apparatus for selectively adjusting the stiffness of

Details Method and apparatus for selectively adjusting the stiffness of Method and apparatus for selectively adjusting the stiffness of

1978-11-08

1980-09-09

Love, John J.

Land vehicles

Skates

Runner type

A63C 507

Patent

active

042214009

ABSTRACT:
Method and apparatus for selectively adjusting the stiffness of a ski using prestressed, curved rod members. The rod members are positioned lengthwise of the ski in bores and the stiffness of the ski can be selectively adjusted by rotating the rod members about their longitudinal axes. For a stiff ski, each rod member is rotated so that the prestressed curve faces upwardly and for a soft ski, each rod member is rotated so that the prestressed curve faces downwardly. By rotating the rod members between these extremes, intermediate degrees of stiffness can be obtained. One or more rod members can be used and when plural rod members are used, the stiffness of the ski can be adjusted both lengthwise and crosswise. Indicating means are provided for showing the rotational position of each rod. The rod members can be placed directly in drilled out bores in the ski, in drilled out bores of a housing which can then be inserted in the ski, or in tubes mounted within or atop the ski. The force of each rod member can be varied along its longitudinal axes if desired and one disclosed embodiment includes prestressed, curved hollow rod members about prestressed curved solid rod members whereby the hollow and solid rod members can be individually rotated to vary the ski's stiffness. The rod members can be disposed within or atop the main body of the ski and can be adapted to adjust the stiffness of any flexible body.

REFERENCES:
patent: 2258046 (1941-10-01), Clement
patent: 2918293 (1959-12-01), Tavi
patent: 3300226 (1967-01-01), Reed, Jr.
patent: 3862755 (1975-01-01), Ogden
patent: 3894745 (1975-07-01), Heim et al.

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