Piston engaging with valve for self-priming in fluid sprayers

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 10422325
APP PUB NO 20180071761A1
SERIAL NO

15704649

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A pump draws fluid from a reservoir and drives the fluid downstream to a spray tip where the fluid is applied to a surface. A piston is driven in a reciprocating manner to pump the fluid. A check valve is disposed downstream of the piston to regulate a flow of the fluid downstream from the piston. The pump is initially dry and is primed with fluid prior to operation. To facilitate priming, the piston is dimensioned to impact the ball and unseat a valve member of the check valve during a priming stroke, thereby ejecting any air from the pump through the check valve. With the air ejected from the pump, a vacuum is formed during a suction stroke of the piston, which draws fluid downstream from the reservoir to prime the pump.

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Patent Owner(s)

Patent OwnerAddress
GRACO MINNESOTA INC88 11TH AVENUE NE MINNEAPOLIS MN 55413

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Luczak, Mariusz J Elk River, US 14 40

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