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1. US20190031285 - BICYCLE CRANK TRANSMISSION APPARATUS

Office United States of America
Application Number 16072258
Application Date 26.12.2016
Publication Number 20190031285
Publication Date 31.01.2019
Publication Kind A1
IPC
B PERFORMING OPERATIONS; TRANSPORTING
62
LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
M
RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
9
Transmissions characterised by use of an endless chain, belt, or the like
04
of changeable ratio
06
using a single chain, belt, or the like
08
involving eccentrically-mounted or elliptically-shaped driving or driven wheel; with expansible driving or driven wheel
B PERFORMING OPERATIONS; TRANSPORTING
62
LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
M
RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
11
Transmissions characterised by use of interengaging toothed wheels or frictionally-engaging wheels
04
of changeable ratio
14
with planetary gears
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
D
COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
41
Freewheels or freewheel clutches
24
specially adapted for cycles
30
with hinged pawl co-operating with teeth, cogs, or the like
B62M 9/08
B62M 11/14
F16D 41/30
CPC
B62M 11/145
B62M 9/08
F16D 41/30
F16H 2001/323
Applicants Hyeon Jin JU
Inventors Sa Seok JANG
Priority Data 10-2016-0014885 05.02.2016 KR
Title
(EN) BICYCLE CRANK TRANSMISSION APPARATUS
Abstract
(EN)

A bicycle crank transmission apparatus includes: a hollow shaft member; a base plate coupled to the shaft member on one side and installed securely on a bottom bracket featuring a spindle on the other side; a chainring housing coupled to the shaft member in a way that allows its rotation and having a ring gear installed securely inside; a reduction gear unit arranged in the middle of the ring gear; a directly-coupled ratchet unit installed on the ring gear; a crank cover where a coupling shaft coupled to the spindle is perpendicularly provided in the center and where clutch ratchet teeth, which are engaged with the directly-coupled ratchet unit, and directly-coupled ratchet teeth are vertically stacked on the internal wall surface; and a sun gear installed on the coupling shaft in such a way that it only rotates in clockwise direction and partially engaged with the reduction gear unit.