Abstract: An excision device configured to excise living tissue by ejecting liquid includes: a supplying unit configured to supply liquid to be ejected; a chamber configured to be filled with the supplied liquid; an ejection nozzle connected to the chamber; a drive member configured to be deformed in the direction to reduce the volume of the chamber when a drive voltage is applied more than a case where the drive voltage is not applied; a liquid ejecting unit configured to eject the liquid in the chamber in a pulsed manner from the ejection nozzle by applying the drive voltage to the drive member in a state in which the chamber is filled with the supplied liquid; and an air-bubble detecting unit configured to detect air bubbles in the chamber by detecting an electric current flowing in the drive member when the drive voltage is applied to the drive member.

Abstract: A fluid supply apparatus which supplies fluid to a medical apparatus includes: a pump mechanism including a first pump capable of a suction operation of the fluid after a feeding operation of the fluid, and a second pump capable of a suction operation of the fluid during the feeding operation and a feeding operation of the fluid during the suction operation; a flow path which includes an elastic member and which communicates with the first pump and the second pump and supplies the fluid to the medical apparatus; and a flow path deforming unit which deforms a part of the flow path. The flow path deforming unit starts first deformation of the flow path before the first pump switches from the feeding operation to the suction operation, and completes the first deformation and starts second deformation of the flow path during the feeding operation by the second pump.

Abstract: A pump chamber is connected to an outlet-side buffer chamber via an outlet channel, and pumps a liquid from the outlet-side buffer chamber. A pressure vibration generated within the pump chamber when the volume of the pump chamber is decreased includes various kinds of information relating to the operating states of the liquid feed pump, such as mixing of bubbles, pumping pressure, dissolved gas amount, and liquid feed amount. Thus, it is possible to detect the pressure vibration, thereby simply and easily detecting the various kinds of information relating to the operating states of the liquid feed pump.

Abstract: A fluid ejection device includes a fluid ejection unit including a plurality of nozzles and configured to eject fluid from at least any one of the nozzles in a pulse-like manner according to a drive signal, a fluid supplying unit configured to supply the fluid to the fluid ejection unit, an ejecting-instruction input unit configured to receive an ejecting instruction input, a mode-selection input unit configured to receive an input of selection information for selecting any one of a first mode for ejecting the fluid using a first nozzle unit including at least one nozzle and a second mode for ejecting the fluid using a second nozzle unit including at least one nozzle, and a fluid-ejecting control unit configured to output, when receiving the ejecting instruction input, according to the selection information, the drive signal such that the fluid is ejected from the first nozzle unit or second nozzle unit.

Abstract: A fluid ejecting apparatus which ejects a fluid, includes: an ejection pipe which has an opening through which the fluid is ejected; a fluid chamber which is communicated with the ejection pipe and accommodates the fluid therein; a bubble generating unit which generates a bubble in the fluid within the fluid chamber; a supply flow path which is communicated with the fluid chamber; an opening and closing unit which is provided in the supply flow path and opens and closes the supply flow path; a fluid supply portion which supplies the fluid to the fluid chamber through the supply flow path by pressurizing the fluid; and a driving control portion which controls driving of the bubble generating unit. The driving control portion performs control such that a bubble is generated by the bubble generating unit after the supply flow path is opened by the opening and closing unit.

Abstract: A fluid feeding pump which varies a volume of a pump chamber and thus feeds a fluid out of the pump chamber, includes: a piezoelectric element which accumulates electric charges inside when a voltage is applied, and which deforms according to an amount of accumulated electric charges and thus increases or decreases the volume of the pump chamber; a drive unit which applies a drive signal with a waveform increasing to a predetermined maximum voltage and then decreasing, and thus drives the piezoelectric element; and an air bubble determining unit which detects a current flowing through the piezoelectric element within a predetermined period after the drive signal is applied to the piezoelectric element, and thus determines whether there are air bubbles in the pump chamber or not.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A medical apparatus system includes: a medical apparatus having an ejection unit which ejects a liquid; and a liquid supply device which supplies the liquid to the medical apparatus. The liquid supply device includes: a supply channel through which the liquid is supplied to the ejection unit; a pressurizing unit which pressurizes the liquid in the supply channel; a blocking unit which blocks the supply channel; and a control unit which causes the pressurizing unit to pressurize the liquid in the supply channel in the state where the supply channel is blocked by the blocking unit.

Abstract: A medical instrument for ejecting liquid includes a liquid chamber that contains the liquid, a driving unit that pressurizes the liquid contained in the liquid chamber, and a vibration detector that detects vibration when the driving unit is driven.

Abstract: An excision device configured to excise living tissue by ejecting liquid includes: a supplying unit configured to supply liquid to be ejected; a chamber configured to be filled with the supplied liquid; an ejection nozzle connected to the chamber; a drive member configured to be deformed in the direction to reduce the volume of the chamber when a drive voltage is applied more than a case where the drive voltage is not applied; a liquid ejecting unit configured to eject the liquid in the chamber in a pulsed manner from the ejection nozzle by applying the drive voltage to the drive member in a state in which the chamber is filled with the supplied liquid; and an air-bubble detecting unit configured to detect air bubbles in the chamber by detecting an electric current flowing in the drive member when the drive voltage is applied to the drive member.

Abstract: A fluid ejection device which ejects a fluid includes: an ejection pipe having an opening to eject the fluid; a fluid chamber which communicates with the ejection pipe and changes in volume due to displacement of a piezoelectric element; a supply channel which communicates with the fluid chamber; an opening/closing unit which is provided on the supply channel and opens and closes the supply channel; a fluid supplying unit which pressurizes the fluid and supplies the fluid to the fluid chamber via the supply channel; and a voltage controller which applies a drive voltage to the piezoelectric element. The voltage controller controls the drive voltage applied to the piezoelectric element so that the drive voltage reaches a predetermined voltage after the supply channel is opened by the opening/closing unit.

Abstract: A fluid supply apparatus which supplies fluid to a medical apparatus includes: a pump mechanism including a first pump capable of a suction operation of the fluid after a feeding operation of the fluid, and a second pump capable of a suction operation of the fluid during the feeding operation and a feeding operation of the fluid during the suction operation; a flow path which includes an elastic member and which communicates with the first pump and the second pump and supplies the fluid to the medical apparatus; and a flow path deforming unit which deforms a part of the flow path. The flow path deforming unit starts first deformation of the flow path before the first pump switches from the feeding operation to the suction operation, and completes the first deformation and starts second deformation of the flow path during the feeding operation by the second pump.

Abstract: A fluid supply apparatus which supplies a fluid to a medical apparatus includes: a pump mechanism including a first pump capable of carrying out a intake operation of a fluid and a feeding operation of the fluid, and a second pump capable of alternately carrying out a intake operation of the fluid and a feeding operation of the fluid; a flow passage which includes an elastic member and which communicates with the pumps and supplies the fluid to the medical apparatus; a pressure fluctuation detecting unit capable of detecting fluctuation in internal pressure in the flow passage; and a flow passage deforming unit which deforms the flow passage according to the fluctuation in the internal pressure.

Abstract: 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.

Abstract: A liquid circulating device includes a pump chamber whose volume is changed by a volume changing unit; an inlet channel that is an inflow passage of the liquid to the pump chamber; a liquid resistance element; an outlet channel; a circulation channel of a length L through which the liquid circulates from the outlet channel to the inlet channel; and a pressure regulating mechanism that contains the liquid of a volume Vb during the non-operation of the volume changing unit and supplies the contained liquid as part of the circulating liquid during the operation of the volume changing unit. When the compliance of the circulation channel is defined as Cs, and the pressure of the liquid in the circulation channel at the position of a length x from the outlet channel during the operation of the volume changing unit is defined as P(x), the volume Vb satisfies a predetermined relationship.

Abstract: An apparatus for fracturing polycrystalline silicon having a pair of rolls which are rotated in a counter direction each other around parallel axes; and a plurality of fracturing teeth which are provided on outer peripheral surfaces of the rolls and are protruded radially-outwardly, in which top surfaces thereof are formed spherically and side surfaces thereof are formed conically or cylindrically, and fracturing fragments of polycrystalline silicon between the rolls.

Abstract: 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.

Abstract: An apparatus for fracturing polycrystalline silicon has: a pair of rolls which are rotated in a counter direction each other around parallel axes; and a plurality of fracturing teeth protruding outward radially from outer peripheral surfaces of the rolls and having variant heights. In the apparatus for fracturing, the fracturing teeth are arranged so that higher teeth among the fracturing teeth and lower teeth among the fracturing teeth are alternately rowed at least along a circumferential direction or a width direction of the rolls; and the fracturing teeth are arranged so that a tip of the higher tooth of the one roll and a tip of the lower tooth of the other roll are opposed to each other at a position in which the fracturing teeth of each rolls are closest to each other, so that the apparatus fractures fragments of polycrystalline silicon between the rolls.