公开(公告)号：US11467116B2

公开(公告)日：2022-10-11

申请号：US16766633

申请日：2018-01-24

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Eric Martin ,  Daryl E. Anderson ,  James Michael Gardner ,  James A. Feinn ,  Kevin Kaufmann

IPC: G01N27/22 ,  G01N27/12

Abstract: In one example in accordance with the present disclosure, a fluid analysis system is described. The fluid analysis system includes a fluidic die. The fluidic die includes a fluid chamber to hold a volume of fluid to be analyzed and an impedance sensor disposed within the fluid chamber. The impedance sensor measures an impedance of the fluid in the fluid chamber. The fluid analysis system also includes an evaluator device electrically coupled to the impedance sensor. The evaluator device determines at least one property of the fluid based on the impedance.

公开(公告)号：US20200309666A1

公开(公告)日：2020-10-01

申请号：US16760933

申请日：2017-12-11

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Eric Martin ,  James Michael Gardner ,  James A. Feinn ,  Rogelio Cicili

IPC: G01N15/06 ,  B41J2/14 ,  G01N27/07

Abstract: A fluid particle concentration detection device may include at least one electrode disposed within a fluidic passageway of a fluidic die, and control circuitry to activate the electrode within the fluidic die. An impedance sensed at the electrode corresponds to a particle concentration within the fluid.

公开(公告)号：US20220379607A1

公开(公告)日：2022-12-01

申请号：US17775934

申请日：2019-12-10

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Jacob Lum ,  James A. Feinn ,  Mengqian Lu ,  Garrett E. Clark

IPC: B41J2/14

Abstract: An example printhead includes a set of circulation channels for flowing a fluid therethrough, the set of nozzles including higher-pressure channels and lower-pressure channels; a first nozzle array having a first nozzle; a second nozzle array having a second nozzle, the first nozzle and the second nozzle forming a row region; a first inter-channel passage fluidically coupling the first nozzle to a first pair of adjacent circulation channels, the first pair including a higher-pressure channel on a first side of a lower-pressure channel; and a second inter-channel passage fluidically coupling the second nozzle to a second pair of adjacent circulation channels, the second pair including a higher-pressure channel on a second side of a lower-pressure channel, the second side being opposite the first side.

公开(公告)号：US11090928B2

公开(公告)日：2021-08-17

申请号：US16763097

申请日：2017-12-11

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Daryl E. Anderson ,  Eric Martin ,  James Michael Gardner ,  James A. Feinn

IPC: B41J2/045 ,  B41J2/14

Abstract: A method of distinguishing between fluids may include providing a current to an electrode disposed within a fluidic passageway of a fluidic die, the current to be forced into a fluid within the fluidic die, sensing an impedance at the electrode, and determining a particle vehicle separation level of the fluid based on the sensed impedance between a first instance and a second instance.

公开(公告)号：US10252527B2

公开(公告)日：2019-04-09

申请号：US15834353

申请日：2017-12-07

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： James A. Feinn ,  David P. Markel ,  Albert Nagao ,  Thomas R. Strand ,  Paul A. Richards ,  Lawrence H. White ,  Erik D. Torniainen

IPC: B41J2/14

Abstract: In some examples, a fluid nozzle includes an aperture comprising a first lobe that is shaped as an ellipse, and a second lobe that has a non-circular shape and has a different size than a size of the first lobe. The fluid nozzle further includes protrusions between the first and second lobes extending inward and forming a throat between the first and second lobes.