Machine element or mechanism – Gearing – Plural power paths to and/or from gearing
Patent
1979-07-19
1981-10-13
Herrmann, Allan D.
Machine element or mechanism
Gearing
Plural power paths to and/or from gearing
74781B, 192 47, F16H 344, F16D 4102
Patent
active
042941385
ABSTRACT:
A two stage transmission hub for a bicycle is disclosed in which one of the hub end portions located at both axial ends of a hub body is extended axially outwardly of a hub flange to form a cylindrical extension integrated with the end portion; transmitting pawls are supported to the cylindrical extension; a sun gear is provided at a hub shaft positioned axially outwardly of the cylindrical extension; a gear frame having a planetary pinion in mesh with the sun gear is rotatably supported to the hub shaft and is arranged axially in series to the cylindrical extension; a cylindrical driving member which covers the outer peripheries of the cylindrical extension and gear frame is rotatably supported to the hub shaft and has at an inner periphery ratchet teeth in mesh with the transmitting pawls and inner teeth in mesh with the planetary pinions, and has at the outer periphery at least one sprocket; and a control member is provided to control the transmitting pawls; so that the driving force from the sprocket is speed-changed at two stages and transmitted to the hub body through the cylindrical extension.
REFERENCES:
patent: 2731857 (1956-01-01), Marino
patent: 3081641 (1963-03-01), Iseman
patent: 3513725 (1970-05-01), Shimano et al.
patent: 3870134 (1975-03-01), Anthamatten
patent: 4059028 (1977-11-01), Schulz et al.
Herrmann Allan D.
Shimano Industrial Company Limited
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