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US 6,854,743 B2Granted
Articulated steering sled
OwnerOwen Atkinson Casto Twitchellinventor
Life of this patent
Estimating the term…
Abstract
A sled having left and right runners pivotably attached to front, center and rear cross members. A central longitudinal member is axially pivotably attached to the front and rear cross members. When rotated, the central longitudinal member moves the central cross member right and left, causing the runners to bend and the sled to turn. The front and rear cross members are free to move toward and away from each other to facilitate the smooth deflection of the runners.
Claims15
A sled comprising:
- front and rear cross members;
- left and right runners pivotably connected to the front and rear cross members;
- a central longitudinal member rotatably connected to the front and rear cross members, and having front, middle and rear portions;
- a central cross member connected to the left and right runners and to the central longitudinal member, the central cross member operable to flex the left and right runners responsive to rotation of the central longitudinal member;
- and,
- at least one of the front and rear cross members moveable toward the central cross member responsive to flexing of the left and right runners,
- wherein the front cross member, the rear cross member and the central cross member remain parallel relative to one another during flexing.
4 more elements
Dependencies are inferred from the claim text.