Pressure-limiting pump system for pressurizing a vessel

Number of patents in Portfolio can not be more than 2000

United States of America Patent

APP PUB NO 20040265156A1
SERIAL NO

10858214

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A pressure-limiting pump system for pressurizing a vessel, including a plunger terminating in a piston loose-fitting within a cylinder. The piston includes a flange forming the lip of an annular groove in the piston for supporting an O-ring seal. The groove is provided with a plurality of ports terminating in the piston within the cylinder. The O-ring is slidable on the piston groove surface. On the intake stroke, the O-ring moves to uncover the ports, and on the compression stroke, the O-ring moves to cover the ports to seal the compression chamber. When pressure exceeds a predetermined level, further compression causes air to bypass the O-ring and escape from the chamber, thereby limiting system pressure. The pump system may be mounted on-axis or off-axis in a tank sidearm. A handle is secured to the sprayer tank via shoulder inserts and is pivotable out of the way when filling the tank, yet can be locked in position as desired by a shift in pivot position.

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First Claim

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Patent Owner(s)

Patent OwnerAddress
CHAPIN MANUFACTURING INC700 ELLICOTT STREET BATAVIA NY 14021

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Boas, Daniel R Byron, NY 2 2
Byron, David Honeoye Falls, NY 26 156

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