公开(公告)号：US20210031185A1

公开(公告)日：2021-02-04

申请号：US16965702

申请日：2018-03-13

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

Inventor： Alexander Govyadinov ,  Chantelle Domingue ,  Paul A. Richards ,  Tommy D. Deskins

IPC: B01L3/00 ,  G01N35/10

Abstract: A method of operating a microfluidic device may include activating a fluid ejection actuator to eject an amount of fluid from a fluid ejection chamber through a nozzle, and activating a pump located within a micro-fluidic channel fluidically coupled to the fluid ejection actuator during a fluid ejection event to create a positive net flow from the pump to the fluid ejection chamber. The fluid ejection event may include a plurality of ejections of fluid from the nozzle.

公开(公告)号：US10850511B2

公开(公告)日：2020-12-01

申请号：US16402969

申请日：2019-05-03

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

Inventor： Alexander Govyadinov ,  Tsuyoshi Yamashita ,  Erik D. Torniainen ,  Nicholas McGuinness ,  David P. Markel

IPC: B41J2/14

Abstract: A fluid ejection device includes a fluid slot, a first fluid ejection chamber communicated with the fluid slot and including a first drop ejecting element, a second fluid ejection chamber communicated with the fluid slot and including a second drop ejecting element, a fluid circulation path communicated with the first fluid ejection chamber and the second fluid ejection chamber, and a fluid circulating element within the fluid circulation path.

公开(公告)号：US20190255845A1

公开(公告)日：2019-08-22

申请号：US16402969

申请日：2019-05-03

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

Inventor： Alexander Govyadinov ,  Tsuyoshi Yamashita ,  Erik D. Torniainen ,  Nicholas McGuinness ,  David P. Markel

IPC: B41J2/14

Abstract: A fluid ejection device includes a fluid slot, a first fluid ejection chamber communicated with the fluid slot and including a first drop ejecting element, a second fluid ejection chamber communicated with the fluid slot and including a second drop ejecting element, a fluid circulation path communicated with the first fluid ejection chamber and the second fluid ejection chamber, and a fluid circulating element within the fluid circulation path.

公开(公告)号：US10365226B2

公开(公告)日：2019-07-30

申请号：US15546936

申请日：2015-04-30

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

Inventor： Alexander Govyadinov ,  Charles M. Santori ,  Anita Rogacs ,  Diane R. Hammerstad ,  Manish Giri

IPC: G01N15/14 ,  G01N21/27 ,  G01N21/64 ,  G01N21/85 ,  G01V8/12 ,  B41J2/125 ,  B41J2/175 ,  B41J2/195

Abstract: Provided in one example is an apparatus, including a substrate supporting a microfluidic channel, a bubble jet inertial pump supported by the substrate adjacent the microfluidic channel to pump fluid through the microfluidic channel and an optical sensor on a first side of the microfluidic channel. A light emitter on a second side of the microfluidic channel is to pass light across the microfluidic channel to the optical sensor.

公开(公告)号：US10336090B2

公开(公告)日：2019-07-02

申请号：US15921614

申请日：2018-03-14

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

Inventor： Alexander Govyadinov ,  Craig Olbrich ,  Brian M. Taff

IPC: B41J2/175 ,  B41J2/14 ,  B41J2/15

Abstract: A fluid ejection device may include a discharge port, an energy generating element to discharge liquid through the discharge port, a first liquid supply on a first side of the discharge port, a second liquid supply on a second side of the discharge port opposite the first side, a first liquid flow path extending from the first liquid supply to the discharge port, a second liquid flow path extending from the second liquid supply to the discharge port and a fluid displacement actuator in the first liquid flow path.

公开(公告)号：US10272691B2

公开(公告)日：2019-04-30

申请号：US15205900

申请日：2016-07-08

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

Inventor： Pavel Kornilovich ,  Alexander Govyadinov ,  David P. Markel ,  Erik D. Torniainen

IPC: F04B19/20 ,  B41J2/18 ,  B41J2/14 ,  B41J2/175 ,  B01L3/00 ,  F04B19/00 ,  F04B19/24

Abstract: A network of microfluidic channels may include at least three loops interconnected at a junction. Each of the loops may include a fluid channel having a length extending from the junction to a second end; and a fluid actuator along the fluid channel and located at a first distance from junction along the length of the fluid channel and at a second distance less than the first distance from the second end. Activation of the fluid actuator of selected ones of the at least three loops may selectively produce net fluid flow in different directions about the loops. In one implementation, a fluid channel having a fluid actuator may have a bridging portion that extends over another fluid channel.

公开(公告)号：US20190111699A1

公开(公告)日：2019-04-18

申请号：US16217140

申请日：2018-12-12

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

Inventor： Alexander Govyadinov ,  Tommy D. Deskins

IPC: B41J2/18 ,  B41J2/14 ,  B41J2/175

CPC classification number: B41J2/18 ,  B41J2/1404 ,  B41J2/14056 ,  B41J2/175 ,  B41J2002/14467 ,  B41J2202/12

Abstract: A fluid ejection device may include a series of spaced two-sided walls forming three channels therebetween. Each of the three channels may contain a drop ejector. The device may further include a fluid circulating element to circulate fluid across the drop ejector within each of the channels.

公开(公告)号：US20190111698A1

公开(公告)日：2019-04-18

申请号：US16217008

申请日：2018-12-11

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

Inventor： Alexander Govyadinov ,  Eric D. Torniainen ,  David P. Markel

IPC: B41J2/18 ,  B01L3/00 ,  F04B19/24 ,  B41J2/14 ,  B41J2/175 ,  F04B19/00 ,  F04B19/20

CPC classification number: B41J2/18 ,  B01L3/502715 ,  B01L3/50273 ,  B01L3/502746 ,  B01L2300/0816 ,  B01L2300/088 ,  B01L2300/123 ,  B01L2400/0481 ,  B01L2400/082 ,  B41J2/1404 ,  B41J2/14201 ,  B41J2/1753 ,  B41J2002/14467 ,  B41J2202/12 ,  F04B19/006 ,  F04B19/20 ,  F04B19/24

Abstract: A fluid ejection device may include a first channel having a first end and a second end, a first drop ejector along the first channel, a second channel having a first end and a second end, a second drop ejector along the second channel, a third channel extending between and connecting the first end of the first channel and the first end of the second channel, a fourth channel extending between and connecting the second end of the first channel and the second end of the second channel and a fifth channel extending between and connecting the third channel and the fourth channel.

公开(公告)号：US10240978B2

公开(公告)日：2019-03-26

申请号：US15546917

申请日：2015-04-30

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

Inventor： Charles M. Santori ,  Alexander Govyadinov

IPC: G01N21/25 ,  G01J3/02 ,  G01N21/64 ,  B01L3/00 ,  G01N15/14 ,  G01N21/05

Abstract: Provided in one example is an apparatus, including a microfluidic channel supported by a substrate. An optical spectrometer includes a waveguide supported by the substrate. The waveguide includes a coupler and outcouplers. A light source directs light to the coupler of the waveguide. Optical sensors are supported by the substrate. Each of the optical sensors is optically coupled to one of the outcouplers.

公开(公告)号：US10207516B2

公开(公告)日：2019-02-19

申请号：US15546808

申请日：2015-04-30

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

Inventor： Alexander Govyadinov ,  Tsuyoshi Yamashita ,  Erik D Torniainen

IPC: B41J2/18 ,  B41J2/14 ,  B41J2/175

Abstract: A fluid ejection device includes a fluid slot, a first fluid ejection chamber communicated with the fluid slot and including a first drop ejecting element, a second fluid ejection chamber including a second drop ejecting element, and a fluid circulation path including a first portion communicated with the fluid slot and the second fluid ejection chamber, and a second portion communicated with the first fluid ejection chamber and the second fluid ejection chamber, with the fluid circulation path including a fluid circulating element within the first portion.