Patents by Inventor Masao Sakurai
Masao Sakurai 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).
-
Publication number: 20120222513Abstract: A variable valve timing device, with a simplified structure and reduced cost, reliably and continuously changes a rotational phase of a camshaft relative to a crankshaft, and can change not only valve opening and closing timing but also valve opening and closing times. A first motion gear to which a rotary power is transmitted from a crankshaft and a second motion gear which transmits rotary power to a camshaft are independently rotatably arranged on a first shaft. A first variable gear meshed with the first motion gear and a second variable gear meshed with the second motion gear are integrally rotatably arranged on a second shaft spaced apart from and in parallel with the first shaft. An adjuster holds the second shaft and rotates the second shaft around the first shaft. The first and second variable gears have different numbers of teeth.Type: ApplicationFiled: November 16, 2010Publication date: September 6, 2012Inventor: Masao Sakurai
-
Patent number: 5331211Abstract: A circuit for controlling the actuation of a vehicle air bag system includes a two terminal electrically actuated ignition element connectable to a drive voltage line through a first transistor and to a circuit ground through another transistor. The voltage source includes the vehicle battery and a capacitor that is charged by the vehicle battery and which supplies operating power in the event the vehicle battery is removed from the circuit, for example, as a consequence of a collision. The transistors are normally biased to a non-conducting state sufficient to isolate the ignition element from the drive voltage source and circuit ground. Vehicle acceleration is sensed by an acceleration sensor which, in the event of a collision, biases both transistors into conduction to effectively connect the two terminals of the ignition element to the drive voltage line and to ground to actuate the vehicle air bag.Type: GrantFiled: May 14, 1993Date of Patent: July 19, 1994Assignee: Nippondenso Co., Ltd.Inventors: Akira Kondo, Motoharu Naitou, Toshiaki Ota, Mitsuhiko Masegi, Masao Sakurai
-
Patent number: 5082845Abstract: Therapeutic agents for the treatment of peptic ulcer disease, containing as active ingredient, at least one compound of the general formula ##STR1## wherein R.sup.1 and R.sup.3 are the same or different and are each (C.sub.1 -C.sub.8)alkyl, ##STR2## R.sup.2 is (C.sub.1 -C.sub.4)alkyl; R.sup.4 and R.sup.5 are the same or different and are each hydrogen or (C.sub.1 -C.sub.2)alkyl; R.sup.6 is (C.sub.1 -C.sub.2)alkyl; and m, n and p are the same or different and are each 1, 2, 3, 4, 5 or 6; with the proviso that one of the groups R.sup.1 and R.sup.3 is ##STR3## or that R.sup.3 represents ##STR4## Some of the compounds of formula I are novel.Type: GrantFiled: February 17, 1989Date of Patent: January 21, 1992Assignee: Hoechst Japan LimitedInventors: Erhard Wolf, Ulrich Gebert, Harald Furrer, Toshizo Tanaka, Masao Sakurai, Masayoshi Goto
-
Patent number: 5045835Abstract: A vehicle operator protection system includes an actuating device, a battery for supplying the actuating device with electric power, and a backup capacitor charged by the battery and supplying power to the actuating device when the battery becomes inoperable. It further includes a switch for cutting off the power supply from the battery and a determining circuit for detecting a discharging condition of the backup capacitor after it has been cut off from the power supply with the switch to determine the existence of an abnormality in the backup capacitor and the actuating device. Through the detection of the discharging condition of the backup capacitor, determination of the existence of an abnormality, based on the intended function of the backup capacitor, can be achieved.Type: GrantFiled: January 4, 1989Date of Patent: September 3, 1991Assignee: Nippondenso Co., Ltd.Inventors: Mitsuhiko Masegi, Masao Sakurai, Motoharu Naitou, Akira Kondo, Toshiaki Ota
-
Patent number: 5038134Abstract: A releasing circuit for actuating a vehicular safety device includes a sensor arranged to provide an acceleration signal responsive to accelerations of the vehicle and an evaluating circuit for setting a predetermined condition for activating a release element of the safety device and responsive to the acceleration signal for effecting the activation of the release element when the predetermined condition has been satisfied by the acceleration signal.Type: GrantFiled: May 24, 1989Date of Patent: August 6, 1991Assignees: Nippondenso Co., Ltd., Toyota Jidosha Kabushiki KaishaInventors: Akira Kondo, Motoharu Naitou, Toshiaki Ota, Mitsuhiko Masegi, Masao Sakurai, Masahito Mutoh, Motomi Iyoda
-
Patent number: 4954642Abstract: This invention relates to forskolin derivatives, their physiologically acceptable salts, and a process for producing these compounds. The forskolin derivative is represented by the general formula ##STR1## wherein; I. when R.sup.1 is hydrogen and R.sup.4 is vinyl, ethyl, or cyclopropyl,(1) either of R.sup.2 and R.sup.3 denotes a residue represented by the formula ##STR2## wherein each of R.sup.5 and R.sup.6 denotes hydrogen or lower alkyl or R.sup.5 and R.sup.6 combine with each other to form a lower alkylene chain which may or may not contain an oxygen or nitrogen atom and m is an integer of 1 to 5, and the other one of R.sup.2 and R.sup.3 denotes hydrogen or a residue represented by the formula CO(CH.sub.2).sub.n X, X being hydrogen or ##STR3## wherein, each of R.sup.7 and R.sup.8 denotes hydrogen or lower alkyl or R.sup.7 and R.sup.8 combine with each other to form a lower alkylene chain which may or may not contain an oxygen or nitrogen atom, and n being an integer of 1 to 5, or(2) R.sup.Type: GrantFiled: May 30, 1989Date of Patent: September 4, 1990Assignee: Nippon Kayaku Kabushiki KaishaInventors: Tochiro Tatee, Takashi Takahira, Kouwa Yamashita, Masao Sakurai, Akira Shiozawa, Kazuhisa Narita
-
Patent number: 4845102Abstract: Therapeutic agent for the treatment of peptic ulcer disease comprising as active ingredient at least one compound of formula I ##STR1## wherein R.sub.1 =5-oxohexyl,R.sub.2 =methyl orR.sub.3 =C.sub.2 -C.sub.4 -alkyl or one compound of formula I,whereinR.sub.1 =4-oxopentyl,R.sub.2 =methyl or ethyl, andR.sub.3 =C.sub.2 -C.sub.4 alkyl,is disclosed, together with a process for using the agent.Type: GrantFiled: October 2, 1987Date of Patent: July 4, 1989Assignee: Hoechst Japan LimitedInventors: Masao Sakurai, Masayoshi Goto, Toshizo Tanaka
-
Patent number: 4835514Abstract: An antitheft system comprises a prohibition device for prohibiting the alarming operation upon receipt of a disarmed memory signal. When an arming signal is inputted, an alarm is generated on the receipt of a theft detection signal generated by handling or operation of vehicle equipment or accessories. When a disarming signal is received, on the other hand, it is sotred and held as the disarmed memory signal in power-supply disconnected state.Type: GrantFiled: April 27, 1987Date of Patent: May 30, 1989Assignees: Nippondenso Co., Ltd., Toyota Jidosha Kabushiki KaishaInventors: Mitsuhiko Masegi, Masao Sakurai, Makoto Aso
-
Patent number: 4633735Abstract: An automobile differential gear system capable of establishing an appropriate differential motion between the right and left driving axles of an automobile so that the automobile is able to run smoothly along a curve where the right and left driving axles are required to be driven at different revolving rates respectively. The system comprises a differential gear, a steering angle detecting unit for detecting a steering angle, a driving speed detecting unit for detecting the speed of the differential gear case, a pinion speed control unit which provides a control signal for controlling the differential motion of the right and left driving axles of the automobile, and a pinion driving unit for rotating the pinions to control the respective revolving rates of the right and left driving axles according to the control signal so that correct and quick response of the movement of the automobile to steering operation is achieved.Type: GrantFiled: October 23, 1985Date of Patent: January 6, 1987Assignee: Nippondenso Co., Ltd.Inventors: Masao Sakurai, Yousuke Hamada, Morimasa Ninomiya, Toshihide Takechi, Kunihiro Nakagawa, Takashi Fujii
-
Patent number: 4582124Abstract: An automotive air conditioning system has refrigeration devices, heating devices and a single chip microcomputer. The refrigeration devices include a variable displacement refrigeration compressor drivingly connectable by an electromagnetic clutch to an automotive engine and a refrigerant evaporator disposed in an air duct, through which air is caused to flow by a blower. The heating devices include a heater core disposed downstream of the refrigerant evaporator, through which heated air is caused to flow, and an air mixing damper which regulates the quantity of air to be introduced into the heater core. A condition relating to the air conditioning operation such as the temperature of the vehicle is detected by a sensor. The microcomputer receives the signals from the sensor, calculates a required injection temperature, compares the required injection temperature and a preset standard temperature, a lower standard temperature and a higher standard temperature and produces operating signals.Type: GrantFiled: June 13, 1985Date of Patent: April 15, 1986Assignee: Nippondenso Co., Ltd.Inventors: Akiro Yoshimi, Masao Nishimura, Masashi Takagi, Yasuyuki Nishi, Masao Sakurai
-
Patent number: 4578960Abstract: A refrigeration system for use in an automotive air conditioning system has a vane type variable displacement refrigerant compressor drivingly connectable by an electromagnetic clutch to an automotive engine, a refrigerant evaporator through which air is caused to flow by a blower, and a pressure check valve which prevents the refrigerant pressure in the evaporator from lowering under the predetermined pressure, so that frost or icing is not formed on the evaporator fins. The compressor is provided with one or two unloading ports for releasing the refrigerant being compressed and with a valve member or members associated with the unloading port. The refrigerator temperature and the pressure of the refrigerant in the conduit between a throttling valve and the compressor are detected. A signal is emitted to an electric circuit for actuating the valve member or members so that the unloading port is selectively opened to vary the compressor displacement to provide a multi-stage compressor displacement control.Type: GrantFiled: November 26, 1984Date of Patent: April 1, 1986Assignee: Nippondenso Co., Ltd.Inventors: Yasuyuki Nishi, Masasi Takagi, Masao Sakurai
-
Patent number: 4561260Abstract: A refrigeration system for an automotive air conditioner includes an evaporator and a variable displacement refrigerant compressor adapted to be driven by an automotive engine. In order to control the refrigeration system, detectors are provided to detect a condition related to the cooling operation of the evaporator, such as air temperature just downstream of the evaporator or the refrigerant pressure, and to detect air temperature in the occupant compartment of the automobile, ambient air temperature outside the automobile or intake air temperature upstream of the evaporator. Signals emitted by the detectors are utilized to control the compressor operation such that the displacement capacity of the compressor is varied stepwise and the compressor is operated intermittently whereby the load on the engine is reduced and the frosting of the evaporator is prevented.Type: GrantFiled: August 6, 1984Date of Patent: December 31, 1985Assignee: Nippondenso Co., Ltd.Inventors: Yasuyuki Nishi, Masashi Takagi, Masao Sakurai
-
Patent number: 4539823Abstract: An automotive air conditioner has an air duct in which a refrigerant evaporator of a refrigeration cycle is disposed in fluid-flow communication with a variable capacity refrigerant compressor driven by an automotive engine and provided with compressor displacement varying members. A blower is provided to cause air to flow through the evaporator and through the duct into the passenger compartment. A sensor is provided to detect a condition representing the cooling operation of the evaporator, such as the air temperature downstream of the evaporator, surface temperature thereof or the pressure of the refrigerant at the evaporator. An electric controlling circuit is operative in response to signals from the sensor to actuate a servo motor which in turn drives the compressor displacement varying members whereby the capacity of the compressor is varied in accordance with the condition detected by the sensor.Type: GrantFiled: May 29, 1984Date of Patent: September 10, 1985Assignee: Nippondenso Co., Ltd.Inventors: Yasuyuki Nishi, Masao Sakurai, Masashi Takagi
-
Patent number: 4537042Abstract: An automotive air conditioner has an air duct in which a refrigerant evaporator of a refrigeration cycle is disposed in fluid-flow communication with a variable capacity refrigerant compressor to be drivingly connected to or disconnected from an automotive engine and provided with compressor displacement varying members. The position of the compressor displacement varying members is electronically controlled such that they are placed in the minimum compressor displacement position each time when the compressor operation is started.Type: GrantFiled: May 8, 1984Date of Patent: August 27, 1985Assignee: Nippondenso Co., Ltd.Inventors: Yasuyuki Nishi, Masao Sakurai, Masashi Takagi
-
Patent number: 4531378Abstract: A refrigeration system for use in an automotive air conditioning system has a variable displacement refrigerant compressor drivingly connectable by an electromagnetic clutch to an automotive engine, a refrigerant evaporator through which air is caused to flow by a blower, and a throttling valve which prevents the refrigerant pressure in the evaporator from lowering over the predetermined pressure, so that frost or icing is not formed on the evaporator fins.The compressor is provided with one or two unloading ports for releasing the refrigerant being compressed and with a valve member or members associated with the unloading port. The operation of the throttling valve is detected by a sensor which emits a signal to an electric circuit for actuating the valve member or members so that the unloading port is selectively or gradually opened to vary the compressor displacement to provide a multi-stage or continuous compressor.Type: GrantFiled: April 24, 1984Date of Patent: July 30, 1985Assignee: Nippondenso Co. Ltd.Inventors: Yasuyuki Nishi, Masasi Takagi, Masao Sakurai
-
Patent number: 4482007Abstract: An apparatus for controlling an air conditioner having a refrigeration cycle including an evaporator disposed in an air passage for supplying air to an area to be air-conditioned and a compressor having a mechanism for varying a volume of discharge from the compressor, comprises signal generator responsive to a humidity in the area to be air-conditioned for producing a signal indicative of the humidity; and means responsive to the signal from the signal generator for actuating the mechanism for varying the volume of discharge from the compressor.Type: GrantFiled: January 7, 1983Date of Patent: November 13, 1984Assignee: Nippondenso Co., Ltd.Inventors: Akiro Yoshimi, Masashi Takagi, Masao Sakurai, Akio Takemi
-
Patent number: 4480443Abstract: An automotive air conditioner has an air duct in which a refrigerant evaporator of a refrigeration cycle is disposed in fluid-flow communication with a variable capacity refrigerant compressor to be drivingly connected to or disconnected from an automotive engine and provided with compressor displacement varying members. The position of the compressor displacement varying members is electronically controlled such that they are placed in the minimum compressor displacement position each time when the compressor operation is started.Type: GrantFiled: April 27, 1982Date of Patent: November 6, 1984Assignee: Nippondenso Co., Ltd.Inventors: Yasuyuki Nishi, Masao Sakurai, Masashi Takagi
-
Patent number: 4476692Abstract: A refrigeration system for use in an automotive air conditioning system has a vane type variable displacement refrigerant compressor drivingly connectable by an electromagnetic clutch to an automotive engine and a refrigerant evaporator through which air is caused to flow by a blower. The compressor is provided with one or two unloading ports for releasing the refrigerant being compressed and with a valve member or members associated with the unloading port or ports. The air temperature just downstream of the evaporator is detected by a sensor which emits a signal to an electric circuit for actuating the valve member or members so that the unloading port or ports are selectively opened to vary the compressor displacement to provide a multistage compressor displacement control. The electric circuit is also operative to control the electromagnetic clutch to selectively connect and disconnect the compressor to and from the engine.Type: GrantFiled: July 16, 1982Date of Patent: October 16, 1984Assignee: Nippondenso Co., Ltd.Inventors: Yasuyuki Nishi, Masasi Takagi, Masao Sakurai
-
Patent number: 4471632Abstract: A refrigeration system for an automotive air conditioner includes an evaporator and a variable displacement refrigerant compressor adapted to be driven by an automotive engine. In order to control the refrigeration system, detectors are provided to detect a condition related to the cooling operation of the evaporator, such as air temperature just downstream of the evaporator or the refrigerant pressure, and to detect air temperature in the occupant compartment of the automobile, ambient air temperature outside the automobile or intake air temperature upstream of the evaporator. Signals emitted by the detectors are utilized to control the compressor operation such that the displacement capacity of the compressor is varied stepwise and the compressor is operated intermittently whereby the load on the engine is reduced and the frosting of the evaporator is prevented.Type: GrantFiled: September 8, 1982Date of Patent: September 18, 1984Assignee: Nippondenso Co., Ltd.Inventors: Yasuyuki Nishi, Masashi Takagi, Masao Sakurai
-
Patent number: 4445109Abstract: Temperature sensing device which has a temperature sensing part including a microchip thermistor in the form not greater than a very small thin piece having a volume of 2 mm.sup.3 as a temperature sensing element. The temperature sensing part is connected to an external circuit to which a temperature sense signal is to be transmitted, by lead wires, and the microchip thermistor is connected to the lead wires through fine lead wires having a wire diameter not greater than 0.5 mm.Type: GrantFiled: February 4, 1982Date of Patent: April 24, 1984Assignee: Nippondenso Co., Ltd.Inventors: Masanori Naganoma, Norio Maehara, Masao Sakurai, Minoru Hashimoto, Kiyoshi Usami