| 摘要 |
A set of add-on front castors or casters, configured for attachment to a conventional three wheeled jogging stroller. The add-on front castor set includes a crossbar with a first crossbar end, a second crossbar end and a mid-crossbar. A first castor mounts proximate the first crossbar end and a second castor mounts proximate the second crossbar end. The add-on front castor set also includes a fork clamp that mounts proximate the mid-crossbar. The fork clamp is attachable to a front wheel fork of the jogging stroller. The front wheel fork is configured to accept a hubbed axle of the single forward wheel that is detachable to so that the front wheel fork can receive the fork clamp of the add-on front castor set. The fork clamp of the front castor set is attached to the front fork by first inserting the front fork between a top clamp plate a bottom clamp plate. A clamp screw threads between the top clamp plate and the bottom clamp plate, and a clamp knob is mounted to an end of the clamp screw. By turning the clamp screw, the front fork is compressed between the top clamp plate and the bottom clamp plate to securely mount the fork clamp to the front fork. The add-on castor allows a jogging stroller to function much as a conventional "baby stroller," with swiveling castors for quick changes in the direction of forward or rearward travel.
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