Multispeed hub for a bicycle
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United States of America Patent
Stats
-
Jul 30, 1996
Grant Date -
N/A
app pub date -
Jan 24, 1995
filing date -
Jan 27, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A hub for a bicycle can typically have an axle for being non-rotationally connected to a frame of the bicycle, a hub body rotatably mounted about the axle, and a drive element rotatably mounted on the axle. A plurality of transmission elements can preferably be disposed between the axle and the hub body for transmitting a drive force from the drive element to the hub body, and a selection between various gearing ratios provided by the transmission elements can preferably be provided by a selectively engageable ratchet mechanism and a control device for selectively engaging and disengaging the ratchet mechanisms. The ratchet mechanism can be provided by at least one pawl, biased radially inward by at least one spring, to non-rotationally couple a ring body in one direction of rotation with the axle. There can also be a control device running parallel to the hub axle to control the engagement of the pawl between the ring body and the axle, whereby the control device can have a control plate with at least one cam. The cam can be configured to disengage the ratchet mechanism. Such a device is advantageous for shifting ratchet mechanisms, even under load, and makes it possible to engage or disengage more than one ratchet mechanism with a single control plate.
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