Pre-compression dual spring pump control

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9651046
APP PUB NO 20140294647A1
SERIAL NO

14245046

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Importance

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Abstract

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A variable capacity vane pump (20) is provided having a pump control ring (44) that is moveable to alter the capacity of the pump (20). A control chamber (60) is formed between the pump casing (22) and the control ring (44). The control chamber (60) is operable to receive pressurized fluid to create a force to move the control ring (44) to reduce the volumetric capacity of the pump (20). A primary return spring (56) acts between the control ring (44) and the casing (22) to bias the control ring (44) towards a position of maximum volumetric capacity. A shaft is coupled at one end to the control ring and a second end of the shaft is positioned a predetermined distance from the casing (22). A secondary return spring (62) is mounted about the shaft and is configured to engage the control ring (44) after the control ring (44) has moved a predetermined amount. The secondary return spring (62) biases the control ring (44) towards a position of maximum volumetric capacity. The secondary return spring (62) acts against the force of the control chamber (60) to establish a second equilibrium pressure.

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Patent Owner(s)

Patent OwnerAddress
MAGNA POWERTRAIN INCCONCORD ONTARIO L4K 4J5

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ganesan, Karthikeyan North York, CA 215 964
Sehmby, Manmohan Brampton, CA 2 1
Tanasuca, Cezar Richmond Hill, CA 9 85
Williamson, Matthew Richmond Hill, CA 49 733

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