| 摘要 |
<p>The invention is a dry surface skiing apparatus including a leading self-steering swivel caster (101, 201, 301, 401, 501), trailing non self-steering swivel caster (103, 203, 303, 403, 503) and a steering system comprising a plurality of members connecting the fork of said leading self-steering swivel caster (101, 201, 301, 401, 501), to the fork of said non self-steering trailing swivel caster (103, 203, 303, 403, 503). It offers major safety improvements compared to the existing prior art. Its operation closer resembles modem carving ski and eliminates problems such as swivel caster flutter and undesirable drift effect with rotary turns. It also adds the ability to brake. Elimination of flutter is achieved by application of non self-steering trailing swivel caster (103, 203, 303, 403, 503) which is cross connected to the leading self-steering swivel caster (101, 201, 301, 401, 501) by the steering system. The ground friction of the wheel in the trailing swivel caster (103, 203, 303, 403, 503) dampens the flutter. At the same time since the rear wheel (103, 203, 303, 403, 503) turns in the opposite way to the front wheel (101, 201, 301, 401, 501), a carved turn is achieved in a similar manner to flexing a carving ski along its entire length. In order to facilitate braking wing like members (220, 320, 420, 520) are attached to the outer edge of each ski which allow transmitting friction of ski pole tips to the ski platform (100, 200, 300, 400, 500).</p> |
