Gravity tricycle

US6402173B1 · kind B1 · utility

Inventor

• Hsien-Chang Chiu · Shiliujia, TW

Key dates

• Filing date: Jan 22, 2001
• Grant date: Jun 11, 2002
• Expiry date: Jan 22, 2021

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B62M1/28
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A gravity tricycle is driven by a power-saving drive device. The drive device includes first and second pedals, which have drive rods respectively connected to bottom edges thereof, front ends of the drive rods being pivotally disposed on a pivot shaft at the bottom edge of the front end of the rear frame such that the two pedals may move upward and downward with the pivot shaft as a fulcrum; a transmission shaft on the rear frame and having an intermediate section provided with two unidirectional flywheels corresponding to the first and second pedals such that the two flywheels drive the transmission shaft counterclockwise only, the transmission shaft being provided with a toothed disk on one side of one of the flywheels to drive the transmission chain; and first and second reciprocating chains having front ends connected to the drive rods of the first and second pedals and being wound past upper ends of the flywheels to extend rearwardly such that rear portions thereof are coupled with a connecting element that is wound around a rotary wheel to thereby establish a linking-up relationship.