Motorcycle fork tree
OwnerTorbjorn Dehnischinventor
Life of this patent
Estimating the term…
Abstract
A motorcycle fork tree assembly includes a steering axle attached to a top tree piece and a bottom inner tree piece. The bottom inner tree piece is pivotally secured to a bottom intermediate tree piece which is adjustably positioned within a bottom outer tree piece. The fork tubes extend through the bottom outer tree piece and are attached to the top tree piece via plugs having offset bores positioned in one of a number of threaded holes of the top tree piece. The degree of trail of the steering assembly for the motorcycle can be easily and quickly adjusted by the independent adjustment of one or more of the bottom outer tree piece relative to the bottom inner tree piece or the plugs in the top tree piece.
Claims7
A fork tree assembly for a motorcycle, said fork tree assembly comprising:
- a steering axle rotatably mountable in a steering head of said motorcycle along a steering axis;
- a top tree piece fixed to a top end of said steering axle;
- a bottom inner tree piece fixed to a bottom end of said steering axle, said bottom inner piece having a first bore along a first axis transverse to said steering axis;
- a bottom intermediate tree piece pivotally mounted on said bottom inner piece about said first axis, said bottom intermediate piece having guide portions extending in a first direction orthogonal to said steering axis and first axis;
- a bottom outer tree piece to which fork tubes are securable, said bottom outer piece having a first portion shaped to correspond to said guide portions so that said guide portions can slidably engage said first portion along said first direction;
- and means for selectively securing said bottom intermediate and bottom outer tree pieces to one another relative to said first direction, whereby said bottom intermediate and bottom outer tree pieces are fixed to one another with selective adjustment in said first direction.
A fork tree assembly for a motorcycle, said fork tree assembly comprising:
- a steering axle rotatably mountable in a steering head of said motorcycle along a steering axis;
- a top tree piece fixed to a top end of said steering axle;
- a bottom inner tree piece fixed to a bottom end of said steering axle, said bottom inner piece having a first bore along a first axis transverse to said steering axis;
- a bottom intermediate tree piece pivotally mounted on said bottom inner piece about said first axis;
- a bottom outer tree piece to which fork tubes are securable, said bottom outer tree piece being connected to said bottom intermediate tree piece;
- at least one threaded hole on each lateral side of said top piece, said hole extending in a direction parallel to said first axis;
- a plug securable to a top of each said fork tube for permitting rotation of said plug relatively to said fork tube about a rotating axis, each said plug having a portion including a bore offset from said rotating axis;
- and
- bolts passing through said bores offset from said axis for securing said plugs to respective ones of said threaded holes.
Dependencies are inferred from the claim text.