Patent application number | Description | Published |
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 |
20100082053 | FLUID EJECTION DEVICE, FLUID EJECTION METHOD AND FLUID EJECTION SURGICAL INSTRUMENT - A fluid ejection device includes: a fluid chamber into which fluid flows; a volume varying unit that varies the volume of the fluid chamber; an inlet fluid channel and an outlet fluid channel intercommunicating with the fluid chamber; a fluid ejection port that ejects fluid flowing out from the outlet fluid channel; a fluid supply unit that supplies fluid into the inlet fluid channel; a controller that controls the variation of the volume of the fluid chamber by the volume varying unit; and a color detector that detects color of a fluid ejection target area facing the fluid ejection port, wherein the controller controls the variation of the volume of the fluid chamber by the volume varying unit in accordance with the color detected by the color detecting 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 |
20110006127 | PULSATING FLOW GENERATING APPARATUS AND METHOD OF CONTROLLING PULSATING FLOW GENERATING APPARATUS - Pulsating flow generating apparatus that changes the volume of a fluid chamber and injects fluid from a fluid injection opening in a pulsed manner, includes: an inlet flow channel for supplying fluid from a fluid supplying unit to the fluid chamber; a volume changing unit that changes the volume of the fluid chamber; an outlet flow channel that delivers the fluid from the fluid chamber to the fluid injection opening; a discharge flow channel that discharges the fluid from the fluid chamber; and an opening and closing valve that opens and closes the discharge flow channel, wherein the synthetic inertance of the discharge flow channel is set smaller than the synthetic inertance of the outlet flow channel, an operation of the volume changing unit is started while closing the opening and closing valve, and the operation of the volume changing unit is stopped while opening the opening and closing valve. | 01-13-2011 |
20110036859 | FLUID EJECTION DEVICE AND METHOD TO CONTROL FLUID EJECTION DEVICE - A fluid ejection device includes a pulsating flow generation section adapted to eject a fluid in a pulsed manner; a fluid supply section adapted to supply the pulsating flow generation section with the fluid; a fluid supply tube having flexibility adapted to communicate the pulsating flow generation section and the fluid supply section with each other; and a drive control section adapted to perform drive control of the pulsating flow generation section and the fluid supply section, wherein the drive control section starts up the pulsating flow generation section, makes the fluid supply section supply the fluid at a first flow rate for a predetermined time period, and then makes the fluid supply section supply the fluid at a second flow rate lower than the first flow rate after the predetermined time period elapses. | 02-17-2011 |
20110037795 | FLUID EJECTION METHOD AND FLUID EJECTION DEVICE - A fluid ejection method includes: supplying fluid at a predetermined fluid supply flow rate to a pressure chamber; generating a pulsed flow by varying the volume of the pressure chamber at a predetermined frequency; and ejecting the pulsed flow, wherein the fluid supply flow rate is proportional to the frequency. | 02-17-2011 |
20110054505 | FLUID EJECTION DEVICE AND METHOD OF CONTROLLING FLUID EJECTION DEVICE - A fluid ejection device includes: a fluid chamber; a volume varying unit configured to vary the volume of the fluid chamber; a fluid supplying unit configured to supply fluid to the fluid chamber at a predetermined pressure; and an ejection command switching unit configured to switch a fluid ejection between a pulsed flow ejection which ejects the fluid in a pulsed manner by activating the volume varying unit and varying the volume of the fluid chamber and a continuous flow ejection which ejects the fluid with a fluid supply pressure from the fluid supplying unit higher than that in the case of the pulsed flow ejection in a state in which the volume varying unit is stopped. | 03-03-2011 |
20110089256 | FLUID EJECTION APPARATUS - A fluid ejection apparatus ejecting fluid from an ejection port, includes: a suction port provided at a position apart from the ejection port and applied with a negative pressure; and a fluid channel provided between the vicinity of the ejection port and the suction port, and configured to suck the fluid in the vicinity of the ejection port by the surface tension of the fluid and move the same toward the suction port. | 04-21-2011 |
20110190804 | FLUID INJECTION DEVICE - A fluid injection device that injects a fluid to a biological tissue from an injection opening to excise the biological tissue, includes: a fluid injection means that injects the fluid from the injection opening; and a suction means that sucks at least one of the injected fluid and the excised biological tissue by periodically varying a negative suction pressure. | 08-04-2011 |
20110208224 | LIQUID INJECTION DEVICE - A liquid injection device includes: a chamber to which the liquid to be injected is supplied and the injection nozzle is connected; a pump that pumps the liquid into the chamber; a volume varying unit that varies the volume of the chamber by being deformed according to a drive voltage applied thereto; and a drive voltage applying unit that applies the drive voltage having a predetermined voltage waveform to the volume varying unit in a state in which the liquid is supplied to the chamber, wherein the pump is a unit that pumps the liquid to the chamber in a state involving the pressure variations, and the drive voltage applying unit is a unit that applies the drive voltage to the volume varying unit while compensating the influence applied by the pressure variations of the pumped to the chamber on injection by varying the voltage waveform of the drive voltage. | 08-25-2011 |
20110215170 | FLUID INJECTION DEVICE - A fluid injection device includes: a pulse generator which converts fluid into pulse flow; a suction pipe projecting from the pulse generator; an injection pipe which is eccentrically inserted into the suction pipe such that the outer circumferential surface of the injection pipe contacts the inner circumferential surface of the suction pipe, and has an injection opening communicating with the pulse generator; and a suction channel and a suction opening formed between the inner circumferential surface of the suction pipe and the outer circumferential surface of the injection pipe, wherein the injection pipe is fixed to the inner circumferential surface of the suction pipe in the vicinity of the injection opening. | 09-08-2011 |
20110238098 | LIQUID INJECTION DEVICE - A liquid injection device includes: a chamber which supply of the liquid and connects with the injection nozzle; a chamber volume varying unit to which driving voltage is applied to reduce the volume of the chamber to a volume smaller than the volume of the chamber before the driving voltage is applied; a driving voltage applying unit which applies the driving voltage to the chamber volume varying unit with the liquid supplied to the chamber; a pseudo noise data memory unit which stores sound data of pseudo noise having audible frequency components contained in driving noise generated when the driving voltage is applied to the chamber volume varying unit; and a pseudo noise outputting unit which outputs the pseudo noise by using the sound data of the pseudo noise such that the sound pressure of the driving noise decreases within the audible frequency range when the driving voltage is applied. | 09-29-2011 |
20120046605 | FLUID INJECTION DEVICE AND MEDICAL INSTRUMENT INCLUDING FLUID INJECTION DEVICE - Fluid is pressurized and supplied to a fluid chamber with a fluid pressurizing and supplying unit. The pressurized fluid within the fluid chamber is ejected through an injection nozzle by reduction of the volume of the fluid chamber caused by applying a driving voltage to a volume varying unit. In applying the driving voltage to the volume varying unit, the effect imposed on fluid injection by pressure fluctuations of the fluid pressurized and supplied to the fluid chamber is compensated by changing the voltage waveform of the driving voltage. When the pressure of the supply flow amount is decreased to a pressure lower than a predetermined pressure, the time intervals of the driving waveform are corrected. The maneuverability of a fluid injection device does not deteriorate even when the pressure of the fluid pressurized and supplied to the fluid chamber fluctuates. | 02-23-2012 |
20120046681 | LIQUID INJECTION DEVICE AND SURGICAL INSTRUMENT INCLUDING LIQUID INJECTION DEVICE - Liquid to be injected from an injection nozzle is supplied through a liquid supply channel toward the injection nozzle. Negative pressure for sucking the liquid injected from the injection nozzle through a suction port is produced by a suction unit and guided through a suction channel toward the suction port. A bypass channel which bypasses the liquid supply channel on the upstream side with respect to the injection nozzle and connects with the suction channel is provided. The bypass channel is opened and closed by an opening and closing unit. According to this structure, flow of unnecessary liquid from the injection nozzle can be reduced by opening the opening and closing unit while injection of liquid is stopping. | 02-23-2012 |
20120089164 | FLUID EJECTION DEVICE AND MEDICAL INSTRUMENT - A fluid ejection device includes a pulsation generator which converts a fluid into a pulsed fluid, a fluid supply unit (supply pump) which supplies the fluid to the pulsation generator, an ejection tube which has an ejection opening communicating with the pulsation generator, a suction tube into which the ejection tube is inserted with play, a suction channel provided between the suction tube and the ejection tube, a suction opening provided at an end of the suction channel in a vicinity of the ejection opening, and a suction unit (suction pump) which sucks fluid in such a manner that the fluid introduced from the suction opening passes through the suction channel. The ejection opening is held by an inner circumferential part of the suction opening. According to this structure, vibration of the ejection tube in the vicinity of the ejection opening can be reduced. | 04-12-2012 |
20120176431 | FLUID EJECTION DEVICE, FLUID EJECTION METHOD, AND MEDICAL APPARATUS - A fluid ejection device for ejecting a fluid to incise or excise a target includes: a fluid supplying unit which supplies the fluid; an operation unit to which the fluid supplied from the fluid supplying unit continues; a fluid ejection tube which ejects the fluid continuing to the operation unit; an ejection mode selecting unit which allows a predetermined ejection mode to be selected; an acceleration sensor which detects an operation acceleration of the operation unit; and a controller which controls ejection of the fluid, using a preset acceleration that is set on the basis of the ejection mode that is selected, and the operation acceleration detected by the acceleration sensor. | 07-12-2012 |
20120221027 | SURGICAL INSTRUMENT - A surgical instrument includes: a fluid chamber to which fluid is supplied; a pulsation generator which produces pulsed flow by pressurizing the fluid supplied to the fluid chamber; an outlet channel which communicates with the fluid chamber through which the pulsed flow is transmitted; a fluid ejection opening which communicates with the outlet channel through which pulse flow is ejected toward an ejection target; a suction opening provided in the vicinity of the fluid ejection opening; and a fluid suctioning unit which suctions the fluid through the suction opening, wherein the opening area at an outlet opening end of the fluid ejection opening on the side near the ejection target is larger than the opening area at an inlet opening end of the fluid ejection opening on the side near the outlet channel. | 08-30-2012 |
20130144321 | LIQUID EJECTION DEVICE AND MEDICAL INSTRUMENT INCLUDING LIQUID EJECTION DEVICE - Fluid is pressurized and supplied to a fluid chamber with a fluid pressurizing and supplying unit. The pressurized fluid within the fluid chamber is ejected through an injection nozzle by reduction of the volume of the fluid chamber caused by applying a driving voltage to a volume varying unit. In applying the driving voltage to the volume varying unit, the effect imposed on fluid injection by pressure fluctuations of the fluid pressurized and supplied to the fluid chamber is compensated by changing the voltage waveform of the driving voltage. When the pressure of the supply flow amount is decreased to a pressure lower than a predetermined pressure, the time intervals of the driving waveform are corrected. The maneuverability of a fluid injection device does not deteriorate even when the pressure of the fluid pressurized and supplied to the fluid chamber fluctuates. | 06-06-2013 |
20130304104 | LIQUID INJECTION DEVICE - A liquid injection device includes: a chamber which supply of the liquid and connects with the injection nozzle; a chamber volume varying unit to which driving voltage is applied to reduce the volume of the chamber to a volume smaller than the volume of the chamber before the driving voltage is applied; a driving voltage applying unit which applies the driving voltage to the chamber volume varying unit with the liquid supplied to the chamber; a pseudo noise data memory unit which stores sound data of pseudo noise having audible frequency components contained in driving noise generated when the driving voltage is applied to the chamber volume varying unit; and a pseudo noise outputting unit which outputs the pseudo noise by using the sound data of the pseudo noise such that the sound pressure of the driving noise decreases within the audible frequency range when the driving voltage is applied. | 11-14-2013 |
20130310862 | MEDICAL APPARATUS - Liquid is ejected in a pulse-like manner from a nozzle provided at the distal end of a liquid ejection pipe. When the liquid is ejected, moving speed of the nozzle is detected. A driving frequency of a piezoelectric element is increased when the moving speed increase. The driving frequency is reduced when the moving speed decreases. Consequently, it is possible to prevent the number of times the liquid is ejected per unit length from changing according to the moving speed of the nozzle. Therefore, it is possible to excise a biological tissue at stable excision depth. | 11-21-2013 |
20140296891 | FLUID EJECTION DEVICE AND MEDICAL APPARATUS - A fluid ejection device which ejects a fluid includes: an ejection tube containing a conductive material and having an opening for the fluid; a fluid chamber communicating with the ejection tube; an actuator which operates on receiving supply of electric energy, thereby changing pressure of the fluid in the fluid chamber; and an insulating member which is made of an insulating material and electrically insulates a member forming the fluid chamber and the ejection tube from each other. | 10-02-2014 |
20140296893 | LIQUID EJECTION DEVICE AND MEDICAL APPARATUS - A liquid ejection device ejecting a liquid in a pulsed manner, includes: an ejection channel that includes an ejection port ejecting the liquid; an actuator that transports pulsed flow to the ejection channel by pressurizing the liquid supplied from outside; a suction channel that includes a suction port capable of sucking the liquid; and a storage container that accommodates a part of the suction channel and the actuator, and in which the ejection channel extends from one end thereof, in which the ejection channel is disposed near the suction channel on a side of the ejection port and is separated from the suction channel by being curved in the storage container, and in which the suction channel is a linear shape or a curved shape having a curvature that is less than that of a curve of the ejection channel in a portion in which the ejection channel is separated. | 10-02-2014 |
20140296894 | LIQUID EJECTION DEVICE AND MEDICAL APPARATUS - A liquid ejection device ejecting a liquid includes: an ejection tube that has an ejection port ejecting the liquid; an actuator that communicates with the ejection tube and applies pulsation to the liquid that is flowed into and then supplies the liquid to the ejection tube; a casing that includes the ejection tube and accommodates the actuator on an inside thereof; a suction channel that is provided in the casing and is capable of sucking the liquid around the ejection port; and a suction adjustment mechanism that has an operation section for adjusting a degree of the suction of the suction channel, in which the operation section is provided in a position near the ejection port from the actuator of the casing. | 10-02-2014 |
20140296895 | FLUID EJECTION DEVICE AND MEDICAL APPARATUS - A fluid ejection device which ejects a fluid includes: an ejection tube which ejects the fluid; a fluid chamber which communicates with the ejection tube; a piezoelectric element capable of changing a volume of the fluid chamber; a controller which controls a drive voltage applied to the piezoelectric element; and a fluid supplying unit which supplies the fluid to the fluid chamber at a predetermined flow rate. If a maximum frequency available to be set of the drive voltage is fmax [Hz] and an amount of change in the volume of the fluid chamber when a maximum value available to be set of the drive voltage is applied to the piezoelectric element to drive the piezoelectric element is V | 10-02-2014 |
20140296896 | FLUID EJECTION DEVICE AND MEDICAL APPARATUS - A fluid ejection device includes a fluid chamber, a volume varying unit, a fluid supplying unit, and an ejection pipe. The volume varying unit generates pulsation in the pressure of a fluid in the fluid chamber. The fluid supplying unit supplies the fluid to the fluid chamber through a first channel. The ejection pipe receives the supply of the fluid, in which the pulsation is generated, from the fluid chamber through a second channel and ejects the supplied fluid from an ejection port. In a connecting part to the fluid chamber, the cross-sectional area of the second channel is five times or more as large as the cross-sectional area of the first channel. In the connecting part to the fluid chamber, the first channel and the second channel are arranged to be opposed to each other via the vicinity of the center of the fluid chamber. | 10-02-2014 |
20140309674 | LIQUID EJECTION DEVICE AND MEDICAL APPARATUS - A liquid ejection device that ejects a liquid from an ejection opening includes: an actuator that is stored in a storage container and pressurizes the liquid supplied from outside; an inlet channel that has a curved shape and is connected to a first surface of the actuator, and supplies the liquid to the actuator; and an outlet channel that is connected to the first surface of the actuator and causes the liquid to flow out from the actuator to the ejection opening. | 10-16-2014 |
20140316452 | LIQUID EJECTION DEVICE AND MEDICAL APPARATUS - A liquid ejection device includes a liquid chamber, a volume varying unit, a liquid supplying unit, and a control unit. An interior volume of the liquid chamber can be varied. The volume varying unit varies the volume in the liquid chamber. The liquid supplying unit supplies liquid to the liquid chamber. The control unit controls the volume varying unit and the liquid supplying unit to thereby adjust the pressure in the liquid chamber. | 10-23-2014 |
20140367485 | FLUID INJECTION DEVICE - A fluid injection device includes a pulse generator which converts fluid into pulse flow, a suction pipe projecting from the pulse generator, an injection pipe which is eccentrically inserted into the suction pipe such that the outer circumferential surface of the injection pipe contacts the inner circumferential surface of the suction pipe, and has an injection opening communicating with the pulse generator, and a suction channel and a suction opening formed between the inner circumferential surface of the suction pipe and the outer circumferential surface of the injection pipe. The injection pipe is fixed to the inner circumferential surface of the suction pipe in the vicinity of the injection opening. | 12-18-2014 |
20140371773 | FLUID EJECTION DEVICE AND MEDICAL INSTRUMENT - A fluid ejection device includes a pulsation generator which converts a fluid into a pulsed fluid, a fluid supply unit (supply pump) which supplies the fluid to the pulsation generator, an ejection tube which has an ejection opening communicating with the pulsation generator, a suction tube into which the ejection tube is inserted with play, a suction channel provided between the suction tube and the ejection tube, a suction opening provided at an end of the suction channel in a vicinity of the ejection opening, and a suction unit (suction pump) which sucks fluid in such a manner that the fluid introduced from the suction opening passes through the suction channel. The ejection opening is held by an inner circumferential part of the suction opening. According to this structure, vibration of the ejection tube in the vicinity of the ejection opening can be reduced. | 12-18-2014 |
20150073450 | LIQUID INJECTION DEVICE AND MEDICAL DEVICE - A liquid injection device includes a liquid injection mechanism including a liquid chamber and an air bubble generation unit provided in the liquid chamber and generating air bubbles, and a control unit that changes a drive signal for driving the air bubble generation unit in response to a movement speed of the liquid injection mechanism. | 03-12-2015 |
20150073453 | MEDICAL DEVICE - A medical device that ejects a fluid includes a fluid ejection portion having an ejection tube having an opening for ejecting the fluid and a pulsation generation portion that generates pulsation to the fluid. A control portion controls a pulsation frequency by controlling the pulsation generation portion. A measurement portion measures movement velocity of the fluid ejection portion. A receiving portion receives instructions for setting a specific frequency and a specific movement velocity from a user. A setting portion sets the specific frequency and movement velocity based on the instruction from a user. A calculation portion calculates a control constant using the specific frequency and movement velocity. The control portion controls the frequency in accordance with the movement velocity so that a value calculated by the same method as calculation of the control constant using the frequency and movement velocity falls within a predetermined range including the control constant. | 03-12-2015 |
20150073455 | LIQUID EJECTING APPARATUS AND MEDICAL DEVICE - A liquid ejecting apparatus including a liquid ejecting mechanism which is provided with a liquid chamber and a volume fluctuation portion that fluctuates a volume within the liquid chamber, a liquid supply portion that supplies a liquid to the liquid chamber, and a control portion that controls the volume fluctuation portion and the liquid supply portion. The control portion changes at least one of a voltage applied to the volume fluctuation portion and a flow rate of a liquid supplied to the liquid chamber in accordance with a movement velocity of the liquid ejecting mechanism. | 03-12-2015 |
20150073456 | LIQUID INJECTION APPARATUS AND MEDICAL INSTRUMENT - A liquid injection apparatus which includes a varying portion configured to vary a pressure in an interior of a liquid chamber in accordance with a drive signal, an injection tube having an injection port configured to inject liquid from the liquid chamber, a liquid supply unit configured to supply liquid to the liquid chamber, and a control unit configured to adjust the pressure in an interior of the liquid chamber by controlling the varying portion and the liquid supply unit. The control unit changes a rise time, which is a time period required for a drive signal to reach a second predetermined voltage from a first predetermined voltage in accordance with a speed of movement of the injection port. | 03-12-2015 |
20150080923 | LIQUID INJECTION DEVICE AND MEDICAL DEVICE - A liquid injection device that injects a liquid includes a liquid chamber, a first channel connected to the liquid chamber and feeding a liquid to the liquid chamber, a second channel connected to the liquid chamber, to which the liquid is fed from the liquid chamber, and an injection tube that communicates with the second channel and injects the liquid, and the second channel has a curved shape. | 03-19-2015 |