Friction gear transmission systems or components – Forward and reverse – Variable speed in forward or reverse
Reexamination Certificate
2007-04-24
2007-04-24
Joyce, William C. (Department: 3682)
Friction gear transmission systems or components
Forward and reverse
Variable speed in forward or reverse
C476S026000, C476S055000
Reexamination Certificate
active
10482004
ABSTRACT:
A mechanical continuously variable transmission in which the power roller is in “line contact” with the counter roller instead of conventional “pinpoint contact”. By utilizing line contact of the power roller and the counter roller, the pressure force between the metal components of a mechanical continuously variable transmission can be reduced. In addition, the line contact also reduces extra energy for maintaining the operation thereof. The configuration of the roll surface of the power roller, which is rotated by a rotation axle connected to an input axle, is formed into a partial configuration of a sphere. A plurality of counter rollers, which are in line contact with the power roller having said roll surface, are arranged in a circle by a disk. Each counter roller is formed with a concave roll surface corresponding to the partial configuration of the sphere on the surface thereof. The counter rollers are driven to rotate by the rotation of the power roller in contact therewith. Each counter roller is assembled rotatably on the same periphery of the disk connected to an output axle so that the concave roll surfaces neighboring to each other roughly continue into a toric shape. A rotation axle of the power roller is adapted so as to be continuously inclined with respect to the disk.
REFERENCES:
patent: 197472 (1877-11-01), Hunt
patent: 4487086 (1984-12-01), Broziat
patent: 1245647 (1959-09-01), None
patent: S54-12445 (1979-03-01), None
patent: 10-129517 (1996-06-01), None
patent: 11-146602 (1999-05-01), None
patent: 2000-170860 (2000-06-01), None
Book: Corona Publishing Co., Ltd, Tokyo, Japan, Hirohisa Tanaka, “Torodial CVT” ISBN4-339-04550-0.
Burns & Levinson LLP
Cohen Jerry
Joyce William C.
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