Abstract: An ultrasonic vibration application tool equipped with a Langevin type ultrasonic vibrator which is suitably employable for ultrasonic processing devices and which efficiently generates ultrasonic vibration includes: a cylindrical housing having a contact face on a lower or bottom part of an inner surface thereof, and a lower screw part of an outer surface thereof; a bolted Langevin type ultrasonic vibrator comprising a front mass, a rear mass and a polarized piezoelectric element arranged between both masses, in which the front mass comprises a cylindrical tool-holder and a disc-shaped bulging part provided with a contact face for fitting to the contact face of the housing; and a ring-shaped counterweight having an upper screw part on an inner peripheral surface which is screwed with the screw part of the housing.

Abstract: An ultrasonic vibration application tool equipped with a Langevin type ultrasonic vibrator which is suitably employable for ultrasonic processing devices and which efficiently generates ultrasonic vibration includes: a cylindrical housing having a contact face on a lower or bottom part of an inner surface thereof, and a lower screw part of an outer surface thereof; a bolted Langevin type ultrasonic vibrator comprising a front mass, a rear mass and a polarized piezoelectric element arranged between both masses, in which the front mass comprises a cylindrical tool-holder and a disc-shaped bulging part provided with a contact face for fitting to the contact face of the housing; and a ring-shaped counterweight having an upper screw part on an inner peripheral surface which is screwed with the screw part of the housing.

Abstract: A novel mode of ultrasonic oscillation is generated in a Langevin ultrasonic transducer comprising a metal block, a metal block provided with a supporting means protruding in a ring shape on its side surface, and polarized piezoelectric elements fixed between these metal blocks, by connecting the ultrasonic transducer to a base via the supporting means, whereby supporting the ultrasonic transducer on the base in a restrained state, and applying to the piezoelectric elements a voltage having such frequency that the ultrasonic transducer generates an ultrasonic oscillation with back-and-forth motion in a direction perpendicular to plane surfaces of the piezoelectric elements which has no oscillation node within the ultrasonic transducer; this novel ultrasonic oscillation mode is utilized for performing ultrasonic machining methods as well as for ultrasonic transmission method.

Abstract: A disklike cutting tool (10) comprises a disklike cutting blade (12) having a circular hole (11) in the center, an annular supporting plate (19) arranged on the surface on each side of the blade (12) coaxially therewith and supporting/fixing the blade (12) at a position on the inner circumferential side of the outer circumferential edge of the blade, and a continuous annular ultrasonic vibrator (14) secured to the surface of the supporting plate (19) coaxially with the blade at a position on the outer circumferential side of the inner circumferential edge of the supporting plate (19). The supporting plate (19) has an ultrasonic reflection plane (16) consisting of the interface with a continuous or discontinuous annular air phase space extending in the thickness direction of the supporting plate (19) at a position on the inner circumferential side of the inner circumferential edge of the ultrasonic vibrator (14).

Abstract: A grinding device (30) for grinding an object (31) at high accuracy has a support table (32) on which the object (31) is supported and fixed, a vertically movable rotating shaft (34) arranged above the support table, a drive device (35) for vertically moving the rotating shaft, a drive device (36) for rotating the rotating shaft, an elastic body (37) fixed to a base section of the rotating shaft, an annular grind stone (38) provided to a bottom of the elastic body, ultrasonic vibrators (39) arranged on the elastic body, and a transmission unit (41) for transmitting electric energy to the ultrasonic vibrators, in which the elastic body is an annular elastic body and a connection plate (42) is provided between the annular elastic body and the base section of the rotating shaft under such condition that the connection plate and the annular elastic body are connected by connection means (45) having alternately arranged connection sections and space sections and each ultrasonic vibrator is arranged at a predetermi

Abstract: A method for manufacturing a lapping board having abrasive grains fixed on its surface, which is performed by the steps of: preparing a rotatable metal board having a surface of soft metal, an abrasive slurry-supplying tool arranged over the surface of the metal board, an abrasive-pressing tool which is placed on the metal board and has a hard surface, and a ultrasonic oscillation-generating tool attached to either or both of the abrasive-pressing tool and the metal board; rotating the metal board while supplying an abrasive slurry onto the surface of the metal board and while supplying electric power to the ultrasonic oscillation-generating tool to generate and apply ultrasonic oscillation to either or both of the abrasive-pressing tool and the metal board, whereby introducing the supplied abrasive slurry between the metal board and the abrasive-pressing tool and partly embedding some abrasive grains onto the metal board; and removing unfixed abrasive grains from the metal board.

Abstract: A grinding machine (10) composed of a support table (12) for supporting an object (11) to be ground, a rotating shaft (13a) vertically arranged above the support table, and a grinding tool (40) connected to a lower end of the rotating shaft in parallel with the support table, in which the grinding tool is composed of a grind stone-holding member (32) on which a circular ultrasonic vibrators (31a, 31b) electrically connectable to an electric source are fixed and a circular grind stone (33) attached to a lower end of a periphery of the grind stone-holding member, in which the grind stone-holding member of the grinding tool has a continuous or discontinuous circular air space area (36) composed of multiple circular air space regions which are composed of circularly formed or arranged discontinuous air spaces between a position of the circular ultrasonic vibrator and a position at which the grind stone-holding member is connected to the rotating shaft, whereby the multiple circular air space area keeps an ultraso

Abstract: A cutting tool (20) capable of cutting or grooving an article with high accuracy independent of the thickness of a cutting disk blade used has a cutting disk blade (22) having a through-hole (21) at its center, an annular rigid plate (23) coaxially fixed to each face of the cutting blade (22), and an annular ultrasonic oscillator (24) having a smaller outer diameter than the rigid plate (23) which is coaxially fixed to an outer face of each rigid plate (23) or to the cutting blade (22) in contact with an inner circumferential edge of each rigid plate (23).

Abstract: A method for manufacturing a lapping board having abrasive grains fixed on its surface, which is performed by the steps of: preparing a rotatable metal board having a surface of soft metal, an abrasive slurry-supplying tool arranged over the surface of the metal board, an abrasive-pressing tool which is placed on the metal board and has a hard surface, and a ultrasonic oscillation-generating tool attached to either or both of the abrasive-pressing tool and the metal board; rotating the metal board while supplying an abrasive slurry onto the surface of the metal board and while supplying electric power to the ultrasonic oscillation-generating tool to generate and apply ultrasonic oscillation to either or both of the abrasive-pressing tool and the metal board, whereby introducing the supplied abrasive slurry between the metal board and the abrasive-pressing tool and partly embedding some abrasive grains onto the metal board; and removing unfixed abrasive grains from the metal board.

Abstract: A method for manufacturing a lapping board having abrasive grains fixed on its surface, which is performed by the steps of: preparing a rotatable metal board having a surface of soft metal, an abrasive slurry-supplying tool arranged over the surface of the metal board, an abrasive-pressing tool which is placed on the metal board and has a hard surface, and a ultrasonic oscillation-generating tool attached to either or both of the abrasive-pressing tool and the metal board; rotating the metal board while supplying an abrasive slurry onto the surface of the metal board and while supplying electric power to the ultrasonic oscillation-generating tool to generate and apply ultrasonic oscillation to either or both of the abrasive-pressing tool and the metal board, whereby introducing the supplied abrasive slurry between the metal board and the abrasive-pressing tool and partly embedding some abrasive grains onto the metal board; and removing unfixed abrasive grains from the metal board.

Abstract: A ultrasonic cutting or grinding machine is composed of an exchangeable cutting or grinding rod, a chuck holding the cutting or grinding rod at a middle portion or rear end thereof, a motor having a rotatable rod, and a transmission rod connecting the chuck and the rotatable rod of the motor, in which the cutting or grinding rod has a ultrasonic transducer on or around its rod in an area between a front end of the rod and a portion in contact with the chuck and in which the ultrasonic transducer is mounted onto the cutting or grinding rod apart from the chuck.

Abstract: A cutting or grinding machine is composed of a processing unit having a substrate and an exchangeable cutting or grinding rod fixed to the substrate at its middle portion or rear end, and a rotatable unit having a rotatable support for workpiece, in which the cutting or grinding rod has a ultrasonic transducer on the rod in an area between a front end of the rod and a portion at which the rod is fixed to the substrate.

Abstract: A ultrasonic cutting or grinding machine is composed of an exchangeable cutting or grinding rod, a chuck holding the cutting or grinding rod at a middle portion or rear end thereof, a motor having a rotatable rod, and a transmission rod connecting the chuck and the rotatable rod of the motor, in which the cutting or grinding rod has a ultrasonic transducer on its rod in an area between a front end of the rod and a portion in contact with the chuck.

Abstract: A flexible tube wherein a plurality of projections formed on an inner wall of the tube to extend axially in the tube are brought into engagement with recesses defined between these projections by a pressure applied from outside to the tube, so that finally the tube interior it closed. Since the flexible tube is not required to be widthwise stretched in order to close the interior of the tube, it is superior in micro-flow controllability and durability can be used for a flow control device or fluid feeder in a desirable manner.

Abstract: A cutting disc blade having a center hole is equipped with a ultrasonic transducer in the form of ring which is coaxially fixed onto one or both surfaces of the disc blade, to give a cutting tool which can be efficiently vibrated with ultrasonic wave.

Abstract: A flow rate of fluid moving within a tube having a small diameter can be measured by the steps of: preparing a structure that has first and second oscillation wave generating-detecting means on a surface of a wall along the conduit; moving the fluid in the conduit; generating an oscillation wave in the first oscillation wave generating-detecting means, applying the wave onto the wall, and measuring a period of time required for transmitting the generated oscillation wave to the second oscillation wave generating-detecting means within the wall; generating an oscillation wave in the second oscillation wave generating-detecting means, applying the wave onto the wall, and measuring a period of time required for transmitting the generated oscillation wave to the first oscillation wave generating-detecting means in the wall; and comparing a difference of the periods of time of transmission and separately prepared calibration data.

Abstract: A method for manufacturing a lapping board having abrasive grains fixed on its surface, which is performed by the steps of: preparing a rotatable metal board having a surface of soft metal, an abrasive slurry-supplying tool arranged over the surface of the metal board, an abrasive-pressing tool which is placed on the metal board and has a hard surface, and a ultrasonic oscillation-generating tool attached to either or both of the abrasive-pressing tool and the metal board; rotating the metal board while supplying an abrasive slurry onto the surface of the metal board and while supplying electric power to the ultrasonic oscillation-generating tool to generate and apply ultrasonic oscillation to either or both of the abrasive-pressing tool and the metal board, whereby introducing the supplied abrasive slurry between the metal board and the abrasive-pressing tool and partly embedding some abrasive grains onto the metal board; and removing unfixed abrasive grains from the metal board.

Abstract: A precision positioning unit composed of a table on which an article is to be placed, a linearly movable rod which is connected with the table at one end and further connected with a rod actuating device at another end, in which the rod actuating device is capable of linearly moving the rod forward and backward, has the following characteristics: the rod is connected with the actuating device via cushion mechanism; and by the side of the rod is placed a rod movement control device composed of an elastic member, a ultrasonic transducer, and a ultrasonic emitting surface, in which the elastic member is constituted to push the ultrasonic emitting surface to a side surface of the rod when the transducer is inactive, and the transducer functioning to draw the ultrasonic emitting surface away from the rod when it is active.

Abstract: An object such as an electronic device can be favorably lapped by a method composed of preparing a lapping machine having a longitudinal or circular lapping board equipped with a ultrasonic oscillation-applying device which applies elliptical vibration to the lapping board and a supporting means arranged adjacently to the lapping board; placing the object on the lapping board via abrasive grains and further on the supporting means; and activating the ultrasonic oscillation-applying device to apply elliptical vibration to the lapping board whereby the object is caused to rotate on an axis thereof and lapped.

Abstract: A clamp-on ultrasonic flowmeter has a pair of ultrasonic transmitting-receiving devices. Each device is composed of a ultrasonic propagating element in the form of wedge having a bottom surface and a slanting surface extending from one edge of the bottom surface at an acute angle, and a ultrasonic transducer attached on the slanting surface. The ultrasonic propagating element is composed of a first ultrasonic propagating member having on its bottom surface a number of planes aligned in parallel with the slanting surface on which the ultrasonic transducer is attached and a second ultrasonic propagating member of elastic or plastic material, so as to propagate ultrasonic wave emitted by the ultrasonic transducer onto the bottom surface of the ultrasonic propagating element at an angle perpendicular to the slanting surface.