Nagasaku, JP

Shigeo Nagasaku, Nishinomiya-Shi JP

Patent application number	Description	Published
20080217916	Threaded joint for steel pipes - A threaded joint for steel pipes comprised of a pin	09-11-2008
20090236850	Threaded joint for steel pipes - A threaded joint for steel pipes having excellent galling resistance, rust preventing properties, and airtightness without using a compound grease comprises a pin and a box each having a threaded portion and an unthreaded metal-to-metal contact portion serving as contact surfaces. The contact surfaces of at least one of the pin and the box are coated with a multi-layered structure comprising, from the bottom, a first layer formed from a first metal or alloy, a second layer formed from a second metal or alloy which is softer than the first metal or alloy, and an uppermost layer of a solid lubricating coating comprising a lubricating powder in an organic or inorganic binder.	09-24-2009
20100059986	THREADED JOINT FOR STEEL TUBES - A pin-box type threaded joint for steel tubes having a contact surface (	03-11-2010
20100270793	THREADED JOINT FOR STEEL PIPES - A threaded joint for steel pipes comprising a pin	10-28-2010
20120235406	THREADED JOINT FOR STEEL PIPES - The galling resistance of a threaded joint for steel pipes which satisfies the standards for an API round threaded joint and which has a pin with triangular male threads and a box with triangular female threads which threadingly engage with the male threads and an unthreaded sleeve positioned at the end of the box is improved. The unthreaded sleeve is shortened or removed so that the length of the unthreaded sleeve in the axial direction of the box becomes at most ½ (including 0) of the value specified by the above standards. The shape of the box specified by the above standards may be modified by providing a swoosh portion at the end of the box and/or by making the bevel angle at the end of the female threads ±15 degrees of the flank angle of the female threads.	09-20-2012

Shigeo Nagasaku, Osaka JP

Patent application number	Description	Published
20090282921	Method for evaluating fastening state of threaded joint of pipes or tubes and method for fastening threaded joint of pipes or tubes using the method - There is provided a method capable of evaluating a fastening state of a threaded joint that is used as a joint of pipes or tubes such as OCTG with a high degree of accuracy even after being fastened and a method for fastening a threaded joint of pipes or tubes using the evaluating method. The present invention provides a method for evaluating a fastening state of a threaded joint of pipes or tubes including a pin having an external thread part, a metal seal part, and a shoulder part on an outer peripheral surface, and a box having an internal thread part, a metal seal part, and a shoulder part corresponding to each part of the pin on an inner peripheral surface and being fastened with the pin. The evaluating method according to the present invention is characterized by transmitting and receiving an ultrasonic wave to and from a plurality of locations along an axial direction of the threaded joint in at least one of the internal thread part, the metal seal part, and the shoulder part of the box; detecting echo intensities for the plurality of locations; and comparing the echo intensities detected for the plurality of locations to determine whether the fastening state of the threaded joint is good or bad.	11-19-2009
20100107766	Ultrasonic testing method of threaded joint of pipes or tubes - There is provided a method for detecting an abnormal portion (defect, non-adhering portion, and seized portion) lying at a contact region between each part of a pin and each part of a box forming a threaded joint to be used as a joint of pipe or tubes such as OCTG. This invention provides an ultrasonic testing method of a threaded joint of pipes or tubes including a pin having an external thread part, a metal seal part, and a shoulder part on an outer peripheral surface, and a box having an internal thread part, a metal seal part, and a shoulder part corresponding to each part of the pin on an inner peripheral surface and being fastened with the pin by way of a lubricant. The method according to the present invention comprising the steps of: transmitting and receiving ultrasonic waves to and from a plurality of locations along an axial direction of the threaded joint in at least one of the internal thread part, the metal seal part, and the shoulder part of the box; detecting echo intensities and reception times of echoes for the plurality of locations; and detecting an abnormal portion in the threaded joint based on axial directional distribution of the echo intensities and axial directional distribution of reception times of the echoes.	05-06-2010
20130019690	TEST APPARATUS FOR A THREADED JOINT FOR OIL COUNTRY TUBULAR GOODS - An apparatus	01-24-2013

Shigeo Nagasaku, Nishinomiya JP

Patent application number	Description	Published
20100038904	Protector for tubular threaded joint - A protector which prevents damage to a solid lubricating coating on a threaded portion of a threaded joint when the protector is mounted on a pin or a box of a threaded joint for pipes in which at least one of the pin or the box is lubricated with a solid lubricating coating comprises a tubular member having a threaded portion on its inner or outer peripheral surface which threadingly engages with at least a portion and preferably 3-5 complete threads of the threaded portion provided on the pin or the box to be protected. The thread height H	02-18-2010

Toshiyuki Nagasaku, Sagamihara JP

Patent application number	Description	Published
20090072920	Oscillator and communication system using the same - A transfer impedance from input terminals of a resonator to output terminals of the resonator is larger than a driving-point impedance of the input terminals of the resonator at an oscillation frequency. The input terminals of the resonator are connected with the drain terminals of transistors Q	03-19-2009

Toshiyuki Nagasaku, Machida JP

Patent application number	Description	Published
20140312970	POWER SUPPLY CIRCUIT - A power supply circuit includes: a push-pull amplifier unit which amplifies an input signal with a push-pull amplification protocol; a variable power supply unit which varies, with a control signal, the voltage level of a power supply voltage which is supplied to the push-pull amplifier; a switch control unit which, on the basis of the input signal, outputs the control signal which controls the voltage level of the power supply voltage; and a timing control unit which applies a specified time delay to the input signal. When the control signal rises, the switch control unit causes the control signal to rise at a faster timing, according to the voltage level switch transition timing, than a delay time upon the timing control unit, and when the control signal falls, the switch control unit causes the control signal to fall at the timing of the delay time.	10-23-2014

Yuichi Nagasaku, Okazaki-Shi JP

Patent application number	Description	Published
20150176541	EVAPORATED FUEL PROCESSING DEVICE - Recirculation piping that recirculates fuel discharged from a fuel pump to an intake side of a fuel pump in a fuel tank is provided. In addition, a canister is formed with a heat transfer surface that guides fuel flowing through the fuel tank during actuation of the fuel pump. When the recirculation piping recirculates the fuel discharged from the fuel pump into the fuel tank, the heat transfer surface transfers heat between the canister and the fuel discharged from the fuel pump among fuel in the fuel tank.	06-25-2015

Yuichi Nagasaku, Toyota-Shi JP

Patent application number	Description	Published
20140007849	FUEL TANK SYSTEM - A fuel tank system capable of purging a canister without relying on the action of negative pressure from the engine, thereby giving excellent energy efficiency. Gases in the fuel tank move to a canister when filling up, and any fuel vapor is adsorbed in the canister. Air components are separated from the gases in the fuel tank using a gas separator and discharged and a negative pressure can be induced inside the fuel tank. This negative pressure acts on the canister and purges the canister.	01-09-2014