Patents by Inventor Toshio Kondo
Toshio Kondo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 4436138Abstract: A reclamation apparatus comprising a centrifugal apparatus for removing impurities from sand by abrasion and entrainment. The apparatus is used to reproduce old molding sand so as to be useable again in making molds and, comprises a cylindrical body including an old sand feed hopper and a dust attraction opening in its upper part, an open-top rotary drum in its central part and a reclaimed sand discharge opening in its lower part. The old sand supplied through the feed hopper is distributed uniformly along the peripheral portion of the bottom plate of the rotary drum by means of a distributor, and the rotary drum is rotated at a high speed to cause a shearing phenomenon in the layer of sand and cause the sand to scatter over the peripheral wall of the drum.Type: GrantFiled: February 22, 1982Date of Patent: March 13, 1984Assignee: Nippon Chuzo Kabushiki KaishaInventor: Toshio Kondo
-
Patent number: 4433461Abstract: An acoustic spherical lens where in a hemispherical hole is formed from a bubble which appears owing to the expansion of residual gases in a lens material employing silica, and the hemispherical hole is used as a lens surface.Type: GrantFiled: December 8, 1982Date of Patent: February 28, 1984Assignee: Hitachi, Ltd.Inventors: Isao Ishikawa, Hiroshi Kanda, Toshio Kondo
-
Patent number: 4430976Abstract: In a feedback control system for air/fuel ratio control of an internal combustion engine, an integration correcting amount is derived from the output signal of a gas sensor indicative of the concentration of an exhaust gas component, and an engine condition correcting amount is selected from a memory in which a plurality of engine condition correcting amounts are prestored in the form of a map. The engine condition correcting amount is renewed in accordance with the variation in the value of the integration correcting amount only within a given period of time or within an interval corresponding to a given number of rotations of the engine crankshaft from an instant of detection of the variation of the gas sensor output level. Thus, the engine condition correcting amount is renewed only when the output signal level of the gas sensor is reliable.Type: GrantFiled: October 16, 1981Date of Patent: February 14, 1984Assignee: Nippondenso Co., Ltd.Inventors: Toshio Kondo, Shigenori Isomura, Akio Kobayashi, Katsuhiko Kodama
-
Patent number: 4394824Abstract: In an acoustic microscope wherein a piezoelectric transducer disposed on one face of an ultrasonic wave focusing lens radiates an ultrasonic wave into the lens and also converts into an electric signal a reflected wave from a specimen arranged on the side of the other face of the lens, a reflected wave from the interface of the lens and the reflected wave from the specimen are caused to interfere with each other.Type: GrantFiled: May 6, 1981Date of Patent: July 26, 1983Assignee: Hitachi, Ltd.Inventors: Hiroshi Kanda, Isao Ishikawa, Toshio Kondo, Kageyoshi Katakura
-
Patent number: 4386530Abstract: An ultrasonic imaging equipment employing a transducer which includes an acoustic propagating medium formed with a concave surface at one end thereof and formed with a piezoelectric thin film on the other end thereof opposing to the one end, and a medium arranged in the concave surface in order to permit the concave surface to effect a lens action, and a dummy transducer which eliminates a transmitted echo and an echo from the lens boundary and which is constructed of the acoustic propagating medium and an acoustic absorber.Type: GrantFiled: January 21, 1981Date of Patent: June 7, 1983Assignee: Hitachi, Ltd.Inventors: Hiroshi Kanda, Isao Ishikawa, Toshio Kondo
-
Patent number: 4384231Abstract: An acoustic spherical lens wherein a hemispherical hole is formed from a bubble which appears owing to the expansion of resudual gases in a lens material employing silica, and the hemispherical hole is used as a lens surface.Type: GrantFiled: April 30, 1980Date of Patent: May 17, 1983Assignee: Hitachi, Ltd.Inventors: Isao Ishikawa, Hiroshi Kanda, Toshio Kondo
-
Patent number: 4373616Abstract: A disc brake includes a caliper slidably supported by an adapter through a caliper supporting pin, each one end portion of a pair of friction pads being in contact with an arm portion of the adapter and each of the other end portions of the friction pads being in contact with the inside wall portion of the caliper whereby braking torque exerted under vehicle forwarding movement is directly received by the adapter and is received by the adapter through the caliper and the caliper supporting pin under vehicle reverse movement.Type: GrantFiled: January 26, 1981Date of Patent: February 15, 1983Assignee: Aisin Seiki Kabushiki KaishaInventor: Toshio Kondo
-
Patent number: 4365299Abstract: The amount of fuel supplied to an internal combustion engine is determined by controlling the opening interval of each fuel injection valve by correcting a standard interval obtained from the amount of intake air and engine speed by first to third correction factors. The first correction factor is dependent on coolant and intake air temperatures, while the second correction factor is dependent on a gas sensor output indicative of the air/fuel ratio of the mixture supplied to the engine. A plurality of third correction factors is provided for different amounts of intake air. Some of the third correction factors corresponding to intake air amounts at which the engine has been operated, are corrected in accordance with the value of the second correction factor.Type: GrantFiled: August 26, 1980Date of Patent: December 21, 1982Assignee: Nippondenso Company, LimitedInventors: Toshio Kondo, Akio Kobayashi, Tomomi Eino, Masahiko Tajima
-
Patent number: 4357690Abstract: A circuit for exciting an ultrasonic transducer element comprises a diode switch exhibiting a long reverse recovery time duration connected between an input and an output terminal. A transducer exciting signal varying in both positive and negative directions and applied to the input terminal is conducted to the output terminal through the diode switch.Type: GrantFiled: December 16, 1980Date of Patent: November 2, 1982Assignee: Hitachi Medical CorporationInventors: Masao Kuroda, Sekijyuro Ono, Toshio Kondo, Noriyoshi Ichikawa
-
Patent number: 4348727Abstract: The basic fuel injection amount determined in accordance with the rpm and the amount of air drawn into an engine is corrected by first, second and third compensation amounts determined in accordance with the engine operating conditions. The second compensation amount is varied by a predetermined value in response to the output of an O.sub.2 sensor at intervals of a predetermined time. The third compensation amount is read out from the location of a non-volatile memory addressed in accordance with the engine rpm and the intake air amount, varied by another predetermined value at intervals of another predetermined time in accordance with the value of the second compensation amount and stored again in the location from which it was read out. Before starting the compensation of the fuel injection amount, the particular bit pattern stored in the non-volatile memory is checked so as to self-check the third compensation amount data in the non-volatile memory.Type: GrantFiled: January 4, 1980Date of Patent: September 7, 1982Assignee: Nippondenso Co., Ltd.Inventors: Akio Kobayashi, Takehiro Kikuchi, Toshio Kondo, Masahiko Tajima
-
Patent number: 4348728Abstract: The air-fuel ratio of a mixture to be supplied to an engine is corrected by a microcomputer in accordance with integrated data produced by the process of integration performed in response to the output signal of an air-fuel ratio sensor for sensing the composition of exhaust gases from the engine and engine condition correction data corresponding to the then existing engine operating conditions. The necessary engine condition correction data are stored in the form of a map in a nonvolatile memory in accordance with the engine operating conditions as parameters. If, for example, any abnormal condition such as an abnormal rise in the temperature of a catalytic converter occurs, all the engine condition correction data in the nonvolatile memory are reset to a predetermined value.Type: GrantFiled: June 11, 1980Date of Patent: September 7, 1982Assignee: Nippondenso Co., Ltd.Inventors: Yasuo Sagisaka, Toshio Kondo, Masahiko Tajima
-
Patent number: 4345561Abstract: An apparatus for controlling an air-fuel ratio of a combustion engine with a memory device for storing correct values for air-fuel control in accordance with an intake condition of said combustion engine and a rotation speed of the same. In the apparatus, an air-fuel ratio represented by the exhaust gas composition of the internal combustion engine is sensed and the sensed value is integrated. When the integrated value from the integrator fails within a predetermined range of values, one of the correction values for the air-fuel ratio control is corrected in accordance with a current condition of the internal combustion engine. When the integrated value falls outside the predetermined range, the correction values are replaced by a predetermined reference value and an air-fuel ratio of mixture supplied to the combustion engine is controlled in accordance with the correction values for the air-fuel ratio stored.Type: GrantFiled: April 2, 1980Date of Patent: August 24, 1982Assignee: Nippondenso Co., Ltd.Inventors: Toshio Kondo, Yasuo Sagisaka, Masahiko Tajima, Akio Kobayashi
-
Patent number: 4321903Abstract: In the method of feedback controlling the air-fuel ratio of an internal combustion engine, the feedback control is stopped for a predetermined period of time at a specified time or condition of the engine, and the air-fuel ratio is controlled in accordance with a control signal having a value corresponding to the average value of the integrated compensation signals. In addition, a factor affecting the center value of the controlled air-fuel ratio is adjusted in accordance with the output signal of a comparator circuit generated during the time that the feedback control is being stopped.Type: GrantFiled: March 6, 1980Date of Patent: March 30, 1982Assignee: Nippondenso Co., Ltd.Inventors: Toshio Kondo, Akio Kobayashi, Tomomi Eino, Naofumi Fukue
-
Patent number: 4319451Abstract: A method for preventing overheating of an exhaust purifying device by means of an air-flow sensor for sensing the amount of air drawn into an engine to generate an analog voltage corresponding to the amount of air drawn, an intake-air temperature sensor for sensing the temperature of the air drawn into the engine to generate an analog voltage corresponding to the temperature of the air drawn, a water temperature sensor for sensing the temperature of the engine cooling water temperature to generate an analog voltage corresponding to the cooling water temperature, a temperature sensor mounted on a converter, an RPM sensor for sensing the rotational speed of the engine to generating a pulse signal of a frequency corresponding to the engine speed, and a circuit responsive to the detection signals from the sensors for computing the desired amount of fuel injected. The computing circuit controls the ON and OFF periods of fuel injection valves to adjust the fuel injection quantity.Type: GrantFiled: March 19, 1980Date of Patent: March 16, 1982Assignee: Nippondenso Co., Ltd.Inventors: Masahiko Tajima, Yasuo Sagisaka, Toshio Kondo, Akio Kobayashi
-
Patent number: 4286560Abstract: An apparatus for controlling an ignition timing of an internal combustion engine for each ignition cycle. The apparatus fetches digital signals representing an intake pipe negative pressure and the number of revolutions of the internal combustion engine, and a digital signal representing a fuel injection time, and computes a basic timing of ignition spark by using the intake pipe negative pressure and the number of revolutions. When the intake pipe negative pressure and the number of revolutions, both being sensed currently, have ratios of changes falling within given values, compared with those sensed precedingly, correction values read out from a memory device on the basis of the intake pipe negative pressure and the number of revolutions are corrected so as to reduce the fuel injection time in accordance with the result of a comparison of the fuel injection time of the fuel injection currently performed with that of the fuel injection precedingly performed.Type: GrantFiled: March 26, 1980Date of Patent: September 1, 1981Assignee: Nippondenso Co., Ltd.Inventors: Yasuo Sagisaka, Toshio Kondo, Akio Kobayashi
-
Patent number: 4254662Abstract: In an ultrasonic imaging system including an array of ultrasonic oscillators, ultrasonic beams are electronically scanned by sequentially selecting a plurality of oscillator sets for beam transmission and reception. For one transmission of ultrasonic waves, at least two receiver oscillator sets having at least some oscillators in common are simultaneously selected, and the respective outputs from the oscillators in the at least two receiver oscillator sets are phase-adjusted so that echoes received by the at least two receiver oscillator sets effectively correspond to echoes substantially emanating from at least two respective different points on a depth level distanced from the plane of the oscillator array by a predetermined depth, whereby at least two signals and hence at least two successive scan lines relating to the echoes from those respective different points are produced. As a result, improved line resolution and rapid line acquisition can be obtained.Type: GrantFiled: August 24, 1978Date of Patent: March 10, 1981Assignee: Hitachi Medical CorporationInventors: Masao Kuroda, Sekijyuro Ono, Kageyoshi Katakura, Toshio Kondo
-
Patent number: 4204483Abstract: A fuel cut-off apparatus is used with an electronically-controlled fuel injection system of the type in which metering of fuel in accordance with the operating conditions of an engine is controlled by the pulse time width of an injection pulse signal applied to electromagnetic fuel injectors. The fuel cut-off apparatus includes a delay circuit, whereby when a fuel cut-off condition is attained during deceleration periods of the engine, the fuel supply to the engine is cut-off after a predetermined time delay.Type: GrantFiled: July 10, 1978Date of Patent: May 27, 1980Assignee: Nippondenso Co., Ltd.Inventors: Susumu Harada, Toshio Kondo, Tomomi Eino
-
Patent number: 4202295Abstract: A fuel supply control system for internal combustion engines properly controls the additional fuel supply at high speed operation and full load operation of the engine without causing overheating of the exhaust gas purifying device of the engine. The fuel supply control system includes a throttle switch for generating a load detection signal when the throttle valve is at its substantially full open position indicative of the heavy load condition of the engine and includes a high speed detecting device for generating a high speed detection signal when the amount of air sucked into the engine or when the intermittent signals from an ignition device exceeds a predetermined amount. In response to at least one of the detection signals, the additional fuel is supplied to the engine.Type: GrantFiled: May 6, 1977Date of Patent: May 13, 1980Assignees: Nippondenso Co., Ltd., Toyota Jidosha Kogyo Kabushiki KaishaInventors: Toshio Kondo, Susumu Harada, Nobuyuki Ito, Nobuyuki Kobayashi
-
Patent number: 4167396Abstract: In an air-to-fuel ratio feedback control system of the type in which the output detection signal of an air-to-fuel ratio detector adapted to detect the concentration of an exhaust gas constituent of an internal combustion engine is compared with a preset value in a comparison circuit whose output signal in turn is utilized to feedback control the air-to-fuel ratio of mixture supplied to the engine, the preset value of the comparison circuit is changed to another value in response to the occurrence of a condition which requires the stopping of the feedback control of the air-to-fuel ratio of mixture supplied to the engine, thereby preventing the occurrence of malfunction during transient periods such as the periods of opening and closing of the feedback control system loop.Type: GrantFiled: September 7, 1977Date of Patent: September 11, 1979Assignees: Nippondenso Co., Ltd., Toyota Jidosha Kogyo Kabushiki KaishaInventors: Toshio Kondo, Nobuyuki Ito, Hideaki Norimatsu, Nobuyuki Kobayashi
-
Patent number: 4099419Abstract: There is disclosed an ultrasonic tomography apparatus of electronic scanning type in which an array of ultrasonic transducer elements are excited with desired time delays allotted for the transducer elements thereby to transmit and receive ultrasonic beams at a deflection angle corresponding to the desired time delays, and the received echo signal of the ultrasonic beams is displayed on a CRT display device in a form of a tomograph of a sample to which the ultrasonic beams are directed. The apparatus comprises a memory in which both of first signals representative of the time delays given to the transducer elements in dependence on given deflection angles and signals designating display position in the X- and Y-directions of the CRT are previously stored and read out for producing delays allotted for the transducer elements and displaying the received echo signal on the CRT.Type: GrantFiled: March 1, 1977Date of Patent: July 11, 1978Assignee: Hitachi Medical CorporationInventors: Masao Kuroda, Toshio Kondo, Toshio Ogawa, Sekijyuro Ono