The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 2001
Filed:
May. 19, 2000
Sen-Jung Chen, Taipei City, TW;
Other;
Abstract
A speed changeable gear drive apparatus is transmits a drive of an output shaft of an electrically powered motor to drive a wheeled vehicle. The apparatus includes a drive shaft coupling with the output shaft to rotate about a first axis and having first and second driving gears with different numbers of teeth. A driven shaft with a second axis is disposed parallel to the drive shaft. A first driven gear is secured on the driven shaft, meshes with the first driving gear, and has a first hub portion provided with a plurality of first spline members. An annular bearing member is sleeved on the first hub portion. A second driven gear is mounted on the driven shaft, meshes with the second driving gear, and has a second hub portion provided with a plurality of second spline members, and an annular anchoring member extending from the second hub portion towards the first driven gear. An annular coupling member is sleeved on and is retainingly shiftable relative to the driven shaft along the second axis, and includes an output end portion adapted to drive the wheeled vehicle, and a splined end portion. When the coupling member is shifted to a first position or a second position by a shifting member, the splined end portion is coupled with the first spline members or with the second spline members so as to transmit the drive of the first driving gear or the second driving gear to the output end portion.