Sequential four-speed shifter

Details Sequential four-speed shifter Sequential four-speed shifter

2005-01-18

2005-01-18

Fenstermacher, David M. (Department: 3682)

Machine element or mechanism

Control lever and linkage systems

Multiple controlled elements

C074S473250

Reexamination Certificate

active

06843149

ABSTRACT:
A mechanical gear shifting mechanism capable of connection to a gearbox includes a shifter frame and a rotatable shaft mounted to the shifter frame. A ratchet drum having teeth is fixed to the shaft. A first cam disc formed with a slot in its main face is fixed to the shaft for rotation therewith. A shifting lever is connected to the shifter frame and is pivotable about an axis in first and second directions. First and second engagement pawls are connected to the shifting lever and positioned for engaging the teeth of the ratchet drum, whereby pivotal movement of the shifting lever induces rotational movement about the shaft's longitudinal axis. A pendant lever is engaged with the slot via a follower and has an end engageable to the gearbox. In practice, the end of the pendant lever would be connected to gear selectors of the gearbox.

REFERENCES:
patent: 3765261 (1973-10-01), Hobbins
patent: 4370897 (1983-02-01), Carlo
patent: 5163635 (1992-11-01), Sato
patent: 5768945 (1998-06-01), Ose
patent: 5921138 (1999-07-01), Kojima et al.
patent: 6308797 (2001-10-01), Hacker et al.
patent: 6487927 (2002-12-01), Sputhe
patent: 20010042421 (2001-11-01), Feng et al.
patent: 20030047020 (2003-03-01), Ikeya
patent: WO 0159335 (2001-08-01), None

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