192 clutches and power-stop control – Clutches – Velocipede free wheel
Patent
1987-03-23
1989-06-13
Bonck, Rodney H.
192 clutches and power-stop control
Clutches
Velocipede free wheel
192 46, 188 8277, F16D 4112
Patent
active
048384011
ABSTRACT:
A transmission mechanism which includes a rotatable driving member and a driven member. One of the driving member and the driven member includes ratchet teeth and the other supports a first transmission pawl and a second transmission pawl each having engaging portions engageable with the ratchet teeth and substantially semicircular-shaped base portions. A substantially C-shaped pawl spring is wrapped around the one of the driving member and the driven member which supports the pawls. The pawl spring biases the first transmission pawl and the second transmission pawl in a direction such that the engaging portions thereof engage with the ratchet teeth. A locking member is provided to prevent rotation of the pawl spring. The first transmission pawl is positioned such that its engaging portion is oriented toward the first free end of the pawl spring and the second transmission pawl is positioned such that its engaging portion is oriented away from the second free end of the pawl spring. The pawls and the spring are positioned such that spring forces applied to the pawls to raise them into engagement with the ratchet teeth are equalized.
REFERENCES:
patent: 1362591 (1920-12-01), von Beaulieu
patent: 3166171 (1965-01-01), Schwerdhofer et al.
patent: 4328882 (1982-05-01), Isobe
patent: 4453729 (1984-06-01), Lucken
French Search Report.
Bonck Rodney H.
Shimano Industrial Company Limited
Testardi David A.
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