Land vehicles – Wheeled – Occupant propelled type
Patent
1995-09-07
1998-09-08
Johnson, Brian L.
Land vehicles
Wheeled
Occupant propelled type
280288, 280275, B62K 1100
Patent
active
058034773
ABSTRACT:
A bicycle frame which includes a strategically-located frame member which is basically a rigid member but which elastically deflects in limited amounts in one direction as it is subjected to increasing compressive forces applied along said direction especially during rough riding conditions but remains rigid and does not deflect when forces normally encountered in the handling and use of a bicycle are applied in other directions to such member. The frame member thus cushions the ride and improves traction while not adding weight or complexity to the frame. In the disclosed embodiment, the frame member is advantageously part of the seatstay and is thus between the seat tube and the rear drop-out. The seatstay incorporating the frame member elastically deflects or deforms under the imposition of sufficient oppositely directed forces of rider weight and ground reaction to absorb part of the force and to maintain traction between the wheel and the ground. Since the seatstay is basically rigid, it maintains the durability of the bike, but since it resiliently deforms under sufficient force, it cushions the ride and improves traction when most needed and without compromising rigidity and weight.
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Costello Leo F.
Johnson Brian L.
Savitt Gary
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