Frame for folding bicycle

Details Frame for folding bicycle Frame for folding bicycle

1982-11-12

1984-07-17

Peters, Jr., Joseph F.

Land vehicles

Wheeled

Occupant propelled type

280278, 280639, 403100, B62K 1500

Patent

active

044601921

ABSTRACT:
A frame for a folding bicycle includes a base frame having a triangular configuration, the base frame having a pair of back forks and a pair of lower stays joined to a pair of end members respectively. A main pipe is interconnected between the pair of back forks and the pair of lower stays, and a quadric link is connected to the triangular base frame. The guadric link includes the main pipe, a seat pipe, a front pipe, and an upper stay, along with a first pivot pivotally connecting the main pipe and the seat pipe to provide pivotal movement of the seat pipe relative to the main pipe, a second pivot pivotally connecting the main pipe and the front pipe to provide pivotal movement of the front pipe relative to the main pipe, a third pivot pivotally connecting the front pipe and the upper stay to provide pivotal movement between the front pipe and the upper stay, and a fourth pivot pivotally connecting the seat pipe and the upper stay to provide pivotal movement between the seat pipe and the upper stay. The quadric link further includes a foldable link extending between the first and the third pivots, the foldable link having a first position which maintains the quadric link in an uncollapsed condition and a second position in which the quadric link is in a collapsed condition. The foldable link further includes an operable device for maintaining the quadric link in the uncollapsed condition, the operable device being manually operable to permit the quadric link to be collapsed and folded to the collapsed condition.

REFERENCES:
patent: 469592 (1892-02-01), Parkes
patent: 561665 (1896-06-01), Hubbell
patent: 3990717 (1976-11-01), Best
patent: 4296940 (1981-10-01), Herbert

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