Friction gear transmission systems or components – Forward and reverse – Variable speed in forward or reverse
Reexamination Certificate
2005-02-01
2005-02-01
Bucci, David A. (Department: 3682)
Friction gear transmission systems or components
Forward and reverse
Variable speed in forward or reverse
C476S015000, C476S067000
Reexamination Certificate
active
06849025
ABSTRACT:
A frictional roller transmission comprises a first roller and a second roller disposed around two shafts which are separated from each other in such a manner that the two rollers are not brought into contact, a third roller and a fourth roller which are brought into contact with both the first and second rollers and are disposed between the first roller and the second roller and on an opposite side over a line connecting the center of the first roller and that of the second roller. An angle made by a tangential line between the first roller and the third roller (or the fourth roller) and a tangential line between the second roller and the third roller (or the fourth roller) is set at two times as large as an angle of friction obtained from a coefficient of friction between the respective rollers or smaller.
REFERENCES:
patent: 1122563 (1914-12-01), Woodworth
patent: 1775201 (1930-09-01), Jacobsen
patent: 1870421 (1932-08-01), Prout
patent: 4029332 (1977-06-01), Davis
patent: 6482121 (2002-11-01), Okoshi
patent: 6-135339 (1994-05-01), None
patent: 6-288453 (1994-10-01), None
patent: 2000-16313 (2000-01-01), None
patent: 2000-16314 (2000-01-01), None
patent: 2001-114118 (2001-04-01), None
patent: 2001-130426 (2001-05-01), None
Abe Manabu
Chikaraishi Kazuo
Maeda Atsushi
Bucci David A.
Miles & Stockbridge P.C.
NSK Ltd.
Smith Julie K.
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