Friction gear transmission systems or components – Fluid control
Reexamination Certificate
2007-10-09
2007-10-09
Joyce, William C. (Department: 3682)
Friction gear transmission systems or components
Fluid control
C476S010000, C476S041000, C477S037000
Reexamination Certificate
active
10476330
ABSTRACT:
A hydraulic control circuit is disclosed for a continuously variable transmission comprising a continuously variable ratio transmission unit (“variator”)10, the circuit comprising a supply line106and means (which may take the form of a pump110) for providing a flow of pressurised fluid in the supply line, means (which may comprise a pressure control valve116) for generating a back pressure in the supply line, and at least one connection for feeding fluid from the supply line to a hydraulic actuator100acting on a movable torque transmission23-37element (which may comprise a roller28) of the variator10. The valve means152connected to the supply line allows pressure in the supply line to be selectively modified in response to rate of flow in the supply line.
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Brooks & Kushman P.C.
Joyce William C.
Torotrak (Development) Limited
LandOfFree
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