Patents by Inventor Hirokazu Uehara
Hirokazu Uehara 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).
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Publication number: 20100148500Abstract: A connector for connecting the end of a chemical tube, a blood tube or a tracheal tube inserted to a human body with that of an external circuit. The connector comprises a male terminal part (2) and a conically-connectable female terminal part (3) composed of an inner cylindrical body (5) and an outer cylindrical body (6) which can rotate relative to each other. On the outer surface of the inner cylindrical body (5) and the inner surface of the outer cylindrical body (6), projected lines (11) and grooves (12) which function as engaging means which can stop the rotation inside the connector by contacting with one another due to elastic deformation of the outer cylindrical body are formed. Accordingly, the conically-connectable rotary connector can be detached easily while a rotation mechanism is provided inside the connector.Type: ApplicationFiled: September 6, 2007Publication date: June 17, 2010Inventors: Hirokazu Uehara, Syouichi Tukakosi, Hiroshi Yokoi
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Patent number: 6691654Abstract: A valve-lash adjuster equipped valve operating device for an internal combustion engine includes a biasing device biasing an engine valve in a valve-closing direction, and a valve drive mechanism opening the engine valve against the spring bias of the biasing device. A hydraulic zero lash adjuster is disposed between the engine valve and the valve drive mechanism to provide zero valve lash. A restriction device is provided to restrict a compressive force applied from each of the engine valve and the valve drive mechanism to the zero lash adjuster, when the engine is stopped.Type: GrantFiled: December 3, 2002Date of Patent: February 17, 2004Assignee: Hitachi Unisia Automotive, Ltd.Inventors: Hirokazu Uehara, Seiji Tsuruta
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Publication number: 20030101952Abstract: A valve-lash adjuster equipped valve operating device for an internal combustion engine includes a biasing device biasing an engine valve in a valve-closing direction, and a valve drive mechanism opening the engine valve against the spring bias of the biasing device. A hydraulic zero lash adjuster is disposed between the engine valve and the valve drive mechanism to provide zero valve lash. A restriction device is provided to restrict a compressive force applied from each of the engine valve and the valve drive mechanism to the zero lash adjuster, when the engine is stopped.Type: ApplicationFiled: December 3, 2002Publication date: June 5, 2003Applicant: HITACHI UNISIA AUTOMOTIVE, LTD.Inventors: Hirokazu Uehara, Seiji Tsuruta
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Patent number: 6263843Abstract: A relative angular phase between a timing sprocket 1 and a camshaft 2 is changed by rotating a vane rotor 3 in a normal-rotation direction or in a reverse-rotation direction by way of relative application of hydraulic pressure to one of a timing-advance phase hydraulic pressure chamber 32 and a timing-retard phase hydraulic pressure chamber 33 both defined in a housing 6 and relative release of hydraulic pressure from the other of the hydraulic pressure chambers, in order to vary the opening and closing timing of an intake valve. A restricting mechanism 10 is also provided for reverse rotation of the vane rotor, which may occur during rotating from the timing-retard phase to the timing advance phase owing to a positive fluctuating torque of the camshaft.Type: GrantFiled: October 13, 1999Date of Patent: July 24, 2001Assignee: Unisia Jecs CorporationInventors: Tamotsu Todo, Seiji Tsuruta, Hirokazu Uehara
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Patent number: 5816216Abstract: A decompression brake device comprises a valve drive mechanism for driving an exhaust valve of an internal combustion engine. The valve drive mechanism has first, second and third conditions, the first condition being a condition wherein the exhaust valve assumes a fully closed rest position during intake, compression and expansion strokes of the engine and a full open position during an exhaust stroke of the engine, the second condition being a condition wherein the exhaust valve assumes the fully closed rest position during the intake stroke of the engine, a slightly open rest position during the compression and expansion strokes of the engine and the full open position during the exhaust stroke of the engine, and the third condition being a condition wherein the exhaust valve assumes the fully closed rest position during the intake stroke of the engine, a largely open rest position during the compression and expansion strokes of the engine and the full open position during the exhaust stroke of the engine.Type: GrantFiled: July 11, 1997Date of Patent: October 6, 1998Assignee: Unisia Jecs CorporationInventors: Noboru Egashira, Hirokazu Uehara, Seiji Tsuruta, Akira Torii
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Patent number: 5743224Abstract: A valve lifter and processing method therefor include a valve lifter surface to be installed in a recess of a cylinder head of an internal combustion engine. The method includes a grinding step for beveling, or tapering, the circumferential end of a cylindrical wall portion of the valve lifter which slidingly contacts the recess. Excess material resulting from the beveling process is then removed for smoothing the beveled circumferential end. The smoothed surface is then coated with a hardening layer for abrasion protection and smoother operational movement. As a final step, the hardening layer may be polished for further enhancement of operating performance.Type: GrantFiled: July 8, 1996Date of Patent: April 28, 1998Assignee: Unisia Jecs CorporationInventors: Noriomi Hosaka, Hirokazu Uehara, Akira Hidaka, Nobutaka Hayashi
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Patent number: 5655499Abstract: In a decompression braking apparatus which is applicable to a Diesel engine and is capable of switching an engine braking condition so as to achieve an engine revolution speed area when a decompression braking request is issued, a sleeve portion of an eccentric bushing member is pivotally interposed between an inner periphery of a rocker arm and an outer periphery of a rocker shaft fitted into the rocker arm so as to be enabled to displace a swing center of the rocker arm toward a downward direction aligned with an open direction of an exhaust valve whose degree of openings in a closure stroke thereof is varied, a first actuator is so constructed and arranged as to actuate the eccentric bushing member to be pivoted so that the swing center of the rocker arm is displaced to a second position at which the degree of openings of the exhaust valve in the closure stroke is relatively large and a second actuator is so constructed and arranged as to limit the pivotal movement of the eccentric bushing member accordingType: GrantFiled: June 14, 1996Date of Patent: August 12, 1997Assignee: Unisia Jecs CorporationInventors: Hirokazu Uehara, Seiji Tsuruta, Akio Akasaka
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Patent number: 5647319Abstract: In a decompression braking apparatus which is applicable to a Diesel engine and is capable of switching an engine braking condition so as to achieve an appropriate braking force depending upon an engine revolution speed area when a decompression braking request is issued, an eccentric bushing member is pivotally interposed between an inner periphery of a rocker arm and an outer periphery of a rocker shaft fitted into the rocker arm so as to be enabled to displace a swing center of the rocker arm to a first position at which a degree of openings in a closure stroke of an exhaust valve whose valve stem is linked to the rocker arm is relatively small and to a second position at which the degree of openings in the closure stroke thereof is relatively large and an actuator having a plunger linked to the eccentric bushing member hydraulically actuates the eccentric bushing member to pivot so that the swing center of the rocker arm is displaced to either of the first or second position depending on an engine revolutType: GrantFiled: June 14, 1996Date of Patent: July 15, 1997Assignee: Unisia Jecs CorporationInventors: Hirokazu Uehara, Noboru Egashira, Seiji Tsuruta
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Patent number: 5529685Abstract: The dialysis apparatus in accordance with the present invention is provided with main piping connecting a blood inlet and a blood outlet, and having disposed therealong a blood pump, a dialyzer, and a venous-side chamber, in that order from the blood inlet side; and with a supplementary fluid supply mechanism, which is connected between the blood inlet and the blood pump through the medium of a branch pipe branching from the main piping; this apparatus is furthermore provided with a first clamp provided between the blood inlet and the blood pump of the main piping, a second clamp provided between the venous-side chamber and the blood outlet, and a third clamp provided on the branch pipe. In addition, by means of this dialysis apparatus, it is possible to reliably and easily return blood within the main piping of the dialysis apparatus to the body of the patient after the completion of blood dialysis.Type: GrantFiled: July 2, 1993Date of Patent: June 25, 1996Assignees: Senko Medical Instrument Mfg. Co., Ltd., San Ai Memorial ClinicInventors: Yasubumi Irie, Kenichi Kurano, Toshikatsu Suzuki, Hiroaki Ishizuka, Hirokazu Uehara, Shingo Ohwaki
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Patent number: 5400749Abstract: A valve lifter of a valve mechanism for an internal combustion engine is provided with a crown-shaped valve lifter body which has a center plate with a recess. A fixing projection is integrally formed with the center plate and is formed along a side wall which defines the recess. An inner shim of a disc shape has a plurality of grooves to which the fixing projection is filled by caulking the fixing projection for fixedly connecting the inner shim with the valve lifter body. Therefore, the inner shim is easily and securely assembled in the recess of the valve lifter body so as not to generate the looseness between the inner shim and the valve lifter body while the assemble performance is improved.Type: GrantFiled: September 8, 1993Date of Patent: March 28, 1995Assignee: Unisia Jecs CorporationInventors: Shin Koizumi, Noriomi Hosaka, Hirokazu Uehara