Continuously variable transmission
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United States of America Patent
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-
Mar 6, 2001
Grant Date -
N/A
app pub date -
Sep 21, 1999
filing date -
Sep 21, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Continuously variable transmission having a hydraulically adjustable transmission ratio, includes a hydraulic circuit that interacts with a reservoir, at least two pumps for pumping hydraulic medium from the reservoir to an outflow channel and adjustor which act on the circuit, for switching the pumps in series or in parallel or is suitable for making and breaking hydraulic connections between an outlet opening of the first pump and an inlet opening of the second pump, between the outlet of the first pump and the outflow channel and between the inlet opening of the second pump and the reservoir and is at least provided with individual hydraulic elements for making and breaking a hydraulic connection between the outlet opening of the first pump and the inlet of the second pump and between the reservoir and the inlet opening of the second pump.
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