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Rear wheel suspension system for a tricycle vehicle

  • US 4,887,829 A
  • Filed: 04/07/1987
  • Issued: 12/19/1989
  • Est. Priority Date: 04/07/1987
  • Status: Expired due to Fees
First Claim
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1. A three wheeled vehicle having a frame, a front wheel, a pair of rear wheels, means for suspending said rear wheels from the frame comprising:

  • a left swing arm comprised of;

    a upper arm pivotally mounted to the frame on a fixed axis and extending outward from the left side of the frame, a lower arm pivotally mounted to the frame on a fixed axis and extending outward from the left side of the frame substantially parallel to said upper arm, a wheel mounting plate pivotally mounted to said upper and lower arms at their outer ends such that the frame portion between the arms;

    the arms; and

    the wheel mounting plate from a quadrilateral,a wheel rotatably mounted to the wheel mounting plate of the left side swing arm,a right side swing arm comprised of;

    a upper arm pivotally mounted to the frame on a fixed axis and extending outward from the right side of the frame, a lower arm pivotally mounted to the frame on a fixed axis and extending outward from the right side of the frame substantially parallel to said upper arm, a wheel mounting plate pivotally mounted to said upper and lower arms at their outer ends such that the frame portion between the arms;

    the arms; and

    the wheel mounting plate form a quadrilateral,a wheel rotatably mounted to the wheel mounting plate of the right side swing arm,a rocker arm pivotally mounted to the frame and disposed above said left and right swing arms,a left linkage member pivotally mounted at its top to the rocker arm and pivotally mounted at its bottom to the left side swing arm,a right linkage member pivotally mounted at its top to the rocker arm and pivotally mounted at its bottom to the right side swing arm.

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