Patent ID: 6336649
Filing Date: 2002-01-08
Classification: B62H,B62K

Abstract:
A foldable bicycle that provides for the folding of the bicycle for easy portability and storage, comprising:an insert box pivotally connected to an insert block, as well as a coupler box pivotally connected to a coupler block and respectively disposed at upper and lower portions between a front frame and a rear frame so as to pivotally connect the front and rear frames; an insertion pin with an attached chain placed through aligned holes in the coupler box and the coupler block to secure the bicycle in an unfolded configuration; a side stand installed at the lower portion of the rear frame to enable the folded bicycle to remain stably vertical; a first cam lever mechanism installed between a top tube of the front frame and a head tube, the mechanism including an upper plate pivotally connected to a lower plate and a movable insert block movable by a cam lever to releasably lock the upper and lower plates together; a quick-release stem clamp on the top tube providing for extension and retraction of a handlebar; a seatpost tube situated over a rear wheel on the rear frame with a quick-release clamp on the seatpost tube providing for height adjustment of a saddle seatpost, the quick-release clamp comprising a band having through-holes in two ends, and a second cam lever mechanism extending through the through-holes and engaging the band; a tab on a seatstay of the rear frame, the tab having a through-hole with a slot to enable the securing of a front wheel, the rear wheel, and the top tube by a lock pin having an attached chain and a protruding block inserted into the through-hole in the tab such that, when the bicycle is folded, a rear rack equipped with a roller wheel enables the movement of the folded bicycle with minimal effort; and, the rear frame has a bottom bracket on which pedals having crank arms are mounted by a third cam lever mechanism whereby the pedals may be moved between outward extending positions for use and inward extending positions for storage.