Printing fluid circulation

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11807019
SERIAL NO

17312366

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A printing fluid pen includes a plurality of fluid ports, a pressure regulator in fluid communication with a first fluid port, and a valve in fluid communication with a second fluid port. The first fluid port is to deliver printing fluid to a fluid ejection device, and the second fluid port is to direct printing fluid out of the pen. In response to negative pressure, the valve is to open to enable fluids within the pen to exit via the second port.

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Patent Owner(s)

  • HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Askeland, Ronald Albert San Diego, US 18 4
Butler, Blair A San Diego, US 15 63
Choy, Si-Lam J Corvallis, US 22 40
Dowell, Daniel D Corvallis, US 29 360
Ender, Ronald J Corvallis, US 23 91
Govyadinov, Alexander Corvallis, US 224 1100
Haddix, Seth Stephen Corvallis, US 1 0
Malik, Craig L Corvallis, US 14 57

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