Patent application number | Description | Published |
20090182261 | Fluid Ejecting Apparatus, Surgical Operation Instrument - A fluid ejecting apparatus includes: a fluid ejecting unit that ejects fluid from a fluid ejecting opening in pulses by reducing the capacity of a fluid chamber by a diaphragm; an inlet channel that supplies the fluid to the fluid chamber; and a check valve formed on the diaphragm and disposed between the inlet channel and the fluid chamber, in which the check valve closes the inlet channel when the capacity of the fluid chamber is reduced, and the check valve is bent when the capacity of the fluid chamber is expanded from the reduced state to open the inlet channel. | 07-16-2009 |
20090270799 | FLUID INJECTION DEVICE - A fluid injection device includes: a fluid injection unit having; a fluid chamber body in which a fixed face, a diaphragm facing the fixed face, a fluid chamber having a space surrounded by a side wall continuing the fixed face and the diaphragm, and an inlet channel tube and an outlet channel tube communicating with the fluid chamber are integrally molded; an actuator in close contact with the diaphragm; and a lid body holding the fluid chamber body, wherein inner surfaces of respective connecting parts of the fixed face, the side wall, and the diaphragm are rounded in molding, and a volume of the fluid chamber is reduced by the diaphragm, and a pulsating fluid is injected from a nozzle opening provided in an end direction of the outlet channel tube. | 10-29-2009 |
20100054960 | PULSATION GENERATING MECHANISM, CONNECTING FLOW CHANNEL TUBE, AND FLUID EJECTING APPARATUS - A fluid ejecting apparatus having a fluid chamber, an inlet flow channel, and a nozzle configured to eject fluid supplied from the inlet flow channel to the fluid chamber from the nozzle in a pulsed manner by changing the volume of the fluid chamber includes: a diaphragm; a wall surface provided so as to oppose the diaphragm; a spacer being provided between the diaphragm and the wall surface and having a cylindrical through hole; a piezoelectric element configured to displace the diaphragm; and a connecting flow channel tube communicated with the fluid chamber, wherein the nozzle is provided at an end of the connecting flow channel tube opposite to the fluid chamber, the fluid chamber is defined by the diaphragm, the wall surface, and an inner surface of the through hole of the spacer, and the inlet flow channel is defined by a groove provided on the wall surface and the spacer and is communicated with the fluid chamber. | 03-04-2010 |
20100078495 | FLUID EJECTION DEVICE, DRIVING METHOD OF FLUID EJECTION DEVICE, AND OPERATING INSTRUMENT - A fluid ejection device includes: a fluid chamber whose capacity is variable; an inlet flow path and an outlet flow path communicating with the fluid chamber; a capacity changing unit which changes the capacity of the fluid chamber; a fluid supplying unit which supplies fluid to the inlet flow path; a fluid ejection opening disposed at an end of the outlet flow path opposite to an end communicating with the fluid chamber; a vibrating unit which vibrates a component in the vicinity of the fluid ejection opening; a vibration detecting unit which detects the level of vibration of the component in the vicinity of the fluid ejection opening; and an operation control unit which controls operation of the capacity changing unit based on the level of the vibration detected by the vibration detecting unit. | 04-01-2010 |
20100079522 | FLUID EJECTION DEVICE, DRIVING METHOD OF FLUID EJECTION DEVICE, AND OPERATING INSTRUMENT - A fluid ejection device includes: a fluid chamber whose capacity is variable; an inlet flow path and an outlet flow path communicating with the fluid chamber; a capacity changing unit which changes the capacity of the fluid chamber; a fluid supplying unit which supplies fluid to the inlet flow path; a fluid ejection opening disposed at an end of the outlet flow path opposite to an end communicating with the fluid chamber; a first electrode of a predetermined polarity having a first contact portion disposed at the fluid ejection opening or a component in the vicinity of the fluid ejection opening; a second electrode having a polarity different from the predetermined polarity and having a second conductive contact portion; a conduction judging unit which judges whether the first electrode and the second electrode are conducted; and an operation control unit which controls operation of the capacity changing unit based on judgment result of the conduction judging unit. | 04-01-2010 |
20100082054 | FLUID EJECTION DEVICE AND FLUID EJECTION METHOD - A fluid ejection device includes: a fluid chamber in which fluid flows; a volume varying unit having a pressure generating element that varies the volume of the fluid chamber on the basis of a driving signal; an inlet fluid channel and an outlet fluid channel intercommunicating with the fluid chamber; a fluid channel pipe having a connection fluid channel that intercommunicates with the outlet fluid channel at a first end thereof and intercommunicates with a fluid ejection port at a second end thereof; a fluid supply unit that supplies fluid to the inlet fluid channel; and a controller that applies a driving signal to the pressure generating element and controls variation of the volume of the fluid chamber by the volume varying unit, wherein the controller applies a driving signal to the pressure generating element so that a maximum ejection velocity of fluid in liquid is larger than a maximum ejection velocity of fluid in the air. | 04-01-2010 |
20100096027 | CHECK VALVE AND PUMP INCLUDING CHECK VALVE - A check valve includes a tubular valve seat frame, a valve seat that is fixedly secured to the inside of the valve seat frame and has a communication hole through which a working fluid flows, and a valve body that is on the working fluid outflow side of the valve seat for opening and closing the valve seat. The valve seat frame, the valve seat, and the valve body are put into one unit so that the check valve has a simple structure and a good assembly property, and can be manufactured at low cost. The check valve is included, whereby a small, durable, and high-performance pump can be provided. | 04-22-2010 |
20100111708 | FLUID EJECTION SYSTEM, FLUID EJECTION SYSTEM DRIVE METHOD, AND SURGICAL APPARATUS - A fluid ejection system includes: a pulsation generation section which, including a fluid chamber, a diaphragm which changes a volume of the fluid chamber, and a piezoelectric element which drives the diaphragm, pulsatively ejects a fluid from a nozzle; and a control apparatus including a pressure generation section which supplies the fluid to the fluid chamber at a predetermined pressure, a drive waveform generation section which inputs a drive waveform into the piezoelectric element, and a load detection section which detects a load of the pressure generation section, wherein in the event that the load detection section has detected a load abnormality of the pressure generation section, a fluid discharge pressure amplitude of the pulsation generation section or a fluid supply pressure of the pressure generation section is made higher than at a normal drive time. | 05-06-2010 |
20110125086 | FLUID INJECTION DEVICE - A fluid injection device includes: a pulse generation section that includes a fluid chamber whose volume is changeable, and an inlet flow passage and an outlet flow passage that are connected to the fluid chamber; a first connection flow passage connected to the outlet flow passage, having an end portion; a second connection flow passage connected to the inlet flow passage; a fluid injection opening formed at the end portion of the first connection flow passage, having a diameter smaller than the diameter of the outlet flow passage; a connection flow passage tube including the first connection flow passage and having rigidity adequate to transmit pulses of fluid flowing from the fluid chamber to the fluid injection opening; and a pressure generation section that supplies fluid to the inlet flow passage. | 05-26-2011 |
20110305588 | FLUID TRANSPORTER - A fluid transporter includes: a rotor; a fluid delivery channel which has a groove having a circular-arc shape around a rotation axis of the rotor and disposed on a surface of a channel frame opposed to the rotor, and a sheet-shaped elastic member sealing an opening of the groove; and a plurality of pressing members disposed between the rotor and the elastic member to sequentially and repeatedly open and close the delivery channel from the upstream side to the downstream side by deforming the elastic member in accordance with the rotation of the rotor. | 12-15-2011 |
20120027624 | FLUID TRANSPORTER AND FLUID TRANSPORTER DRIVING METHOD - A fluid transporter which transports fluid by pressing a plurality of radially disposed pressing shafts against a tube held in a circular-arc shape in directions from the inside of the circular-arc shape in accordance with rotation of a rotational pressing plate having a plurality of projections on the outer circumference thereof so as to allow flow of fluid includes: a first detecting section which detects the rotation angle of the rotational pressing plate; a second detecting section which detects the rotation angle of either a driving rotor for giving a rotational force to the rotational pressing plate or a reduction transmission mechanism for connecting the driving rotor and the rotational pressing plate; a data table which shows the relationship between the rotation angle of the rotational pressing plate and a cumulative delivery amount; and a controller which controls the drive of the driving rotor. | 02-02-2012 |
20120095401 | LIQUID SUPPLY PUMP AND MEDICAL INSTRUMENT - A liquid supply pump includes: three chambers of a first liquid chamber, a second liquid chamber, and a third liquid chamber disposed in series and produced by dividing a space between an inlet channel into which liquid is supplied and an outlet channel from which liquid is delivered; a first movable partition and a second movable partition which section the respective chambers and change the volumes of the chambers; channels each of which penetrates the corresponding one of the first and second movable partitions so that the two adjoining chambers can communicated with each other; and non-return valves each of which opens and closes the corresponding one of the channels. Each of the non-return valves closes when the corresponding movable partition shifts from the inlet channel side toward the outlet channel side, and opens when the corresponding movable partition shifts from the outlet channel side toward the inlet channel side. | 04-19-2012 |
20120181352 | LIQUID EJECTING APPARATUS - A liquid ejecting apparatus includes: an inflow channel to which liquid is supplied; an outflow channel communicated with a nozzle; a liquid chamber formed with a spiral flow channel having a substantially constant cross-sectional area between the inflow channel and the outflow channel and having a given volume; a volume changing portion configured to deform the liquid chamber so as to change the volume of the liquid chamber to a volume smaller than the given volume; and an ejection control unit configured to cause the liquid to be ejected from the nozzle in a pulsed manner by driving the volume changing portion in a state in which the liquid chamber is filled with the liquid. | 07-19-2012 |
20130079707 | FLUID INJECTION DEVICE - A fluid injection device includes: a pulse generation section that includes a fluid chamber whose volume is changeable, and an inlet flow passage and an outlet flow passage that are connected to the fluid chamber; a first connection flow passage connected to the outlet flow passage, having an end portion; a second connection flow passage connected to the inlet flow passage; a fluid injection opening formed at the end portion of the first connection flow passage, having a diameter smaller than the diameter of the outlet flow passage; a connection flow passage tube including the first connection flow passage and having rigidity adequate to transmit pulses of fluid flowing from the fluid chamber to the fluid injection opening; and a pressure generation section that supplies fluid to the inlet flow passage. | 03-28-2013 |
20140044565 | FLUID TRANSPORTER AND FLUID TRANSPORTER DRIVING METHOD - A fluid transporter which transports fluid by pressing a plurality of radially disposed pressing shafts against a tube held in a circular-arc shape in directions from the inside of the circular-arc shape in accordance with rotation of a rotational pressing plate having a plurality of projections on the outer circumference thereof so as to allow flow of fluid includes: a first detecting section which detects the rotation angle of the rotational pressing plate; a second detecting section which detects the rotation angle of either a driving rotor for giving a rotational force to the rotational pressing plate or a reduction transmission mechanism for connecting the driving rotor and the rotational pressing plate; a data table which shows the relationship between the rotation angle of the rotational pressing plate and a cumulative delivery amount; and a controller which controls the drive of the driving rotor. | 02-13-2014 |
20140044566 | FLUID TRANSPORTER AND FLUID TRANSPORTER DRIVING METHOD - A fluid transporter which transports fluid by pressing a plurality of radially disposed pressing shafts against a tube held in a circular-arc shape in directions from the inside of the circular-arc shape in accordance with rotation of a rotational pressing plate having a plurality of projections on the outer circumference thereof so as to allow flow of fluid includes: a first detecting section which detects the rotation angle of the rotational pressing plate; a second detecting section which detects the rotation angle of either a driving rotor for giving a rotational force to the rotational pressing plate or a reduction transmission mechanism for connecting the driving rotor and the rotational pressing plate; a data table which shows the relationship between the rotation angle of the rotational pressing plate and a cumulative delivery amount; and a controller which controls the drive of the driving rotor. | 02-13-2014 |
20140163417 | FLUID INJECTION DEVICE - A fluid injection device includes: a pulse generation section that includes a fluid chamber whose volume is changeable, and an inlet flow passage and an outlet flow passage that are connected to the fluid chamber; a first connection flow passage connected to the outlet flow passage, having an end portion; a second connection flow passage connected to the inlet flow passage; a fluid injection opening formed at the end portion of the first connection flow passage, having a diameter smaller than the diameter of the outlet flow passage; a connection flow passage tube including the first connection flow passage and having rigidity adequate to transmit pulses of fluid flowing from the fluid chamber to the fluid injection opening; and a pressure generation section that supplies fluid to the inlet flow passage. | 06-12-2014 |
20150075367 | LIQUID EJECTING APPARATUS - A liquid ejecting apparatus includes: an inflow channel to which liquid is supplied; an outflow channel communicated with a nozzle; a liquid chamber formed with a spiral flow channel having a substantially constant cross-sectional area between the inflow channel and the outflow channel and having a given volume; a volume changing portion configured to deform the liquid chamber so as to change the volume of the liquid chamber to a volume smaller than the given volume; and an ejection control unit configured to cause the liquid to be ejected from the nozzle in a pulsed manner by driving the volume changing portion in a state in which the liquid chamber is filled with the liquid. | 03-19-2015 |