Transmission

Details Transmission Transmission

2007-08-21

2007-08-21

Pang, Roger (Department: 3681)

Machine element or mechanism

Gearing

Interchangeably locked

C074S331000, C074S404000

Reexamination Certificate

active

11110758

ABSTRACT:
In the transmissions of the background art, two larger-diameter gears are mounted on a final shaft thereby causing an increase in weight of the transmission. The present invention reduces the weight of a transmission by mounting only one larger-diameter gear on a final shaft. The transmission of the present invention includes an output shaft; a countershaft extending parallel to the output shaft; an intermediate shaft extending parallel to the output shaft; a forward drive gear rotatably supported relative to the countershaft; a reverse drive gear rotatably supported relative to the countershaft; a first intermediate gear rotatably supported relative to the intermediate shaft, the first intermediate gear normally meshing with the reverse drive gear; a second intermediate gear rotatably supported relative to the intermediate shaft, the second intermediate gear being interlocked with the first intermediate gear to rotate therewith; an output shaft driven gear fixed to the output shaft, the output shaft driven gear being normally meshing with the forward drive gear and the second intermediate gear; and a gear selecting and fixing device axially movably mounted on the countershaft for selectively fixing the forward drive gear and the reverse drive gear to the countershaft.

REFERENCES:
patent: 3149498 (1964-09-01), Mack
patent: 4667526 (1987-05-01), Young
patent: 4916960 (1990-04-01), Inui et al.
patent: 5385064 (1995-01-01), Reece
patent: 6332371 (2001-12-01), Ohashi et al.
patent: 6487924 (2002-12-01), Matsufuji et al.
patent: 6655226 (2003-12-01), Oguri
patent: 6948393 (2005-09-01), Hori et al.
patent: 60-179328 (1985-09-01), None

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