Nitta Corporation

Nara-shi, Japan

Nitta Corporation

Nara-shi, Japan
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Patent
Nitta Corporation | Date: 2017-01-30

A shaft structure installed in a shaft capable of making a power-transmission includes a male component having splines and spline bottoms on an outer periphery, a female component having splines and spline bottoms on an inner periphery and allows the male component to be slidably inserted in an axial direction thereby making up the shaft structure, and an elastic member covering the outer or inner periphery of the male or female component, wherein the female component has substantially U or V-shaped cross-section grooves on the outer periphery as opposed to splines, and a shape defined by the spline of the female component and the groove is such a shape that when the male or female component is twisted and a stress is applied to the spline in a direction around the shaft, the spline could be elastically deformed and absorb a maximum design stress within an elastic region.


Patent
Nitta Corporation | Date: 2017-09-06

Provided is a connection mechanism between a valve and a joint is configured to connect a tube through the joint 1 to a housing 2 of the valve in air piping. The housing 2 of the valve includes a connection hole 22 for accommodating and connecting the joint 1. A tubular part 21 configured to attach a front end part of the tube thereto is formed inside the connection hole 22. The joint 1 includes a tube seal 11, a back ring 13 with a lock ring 12 including a claw 121 for preventing disengagement of the tube, a release ring 14, and a tubular cap 15. The joint 1 is configured to be press-inserted into the connection hole of the housing 2.


Patent
Nitta Corporation | Date: 2017-08-30

Provided are a composite material and a reinforced fiber. The composite material (1) includes a fiber (3) and a plurality of carbon nanotubes (5) disposed on a surface of the fiber (3). The carbon nanotubes (5) adhere directly to the surface of the fiber (3). The composite material and the reinforced fiber exhibit both of intrinsic functions of the fiber and functions, such as electrical conductivity, thermal conductivity, and mechanical strength, derived from CNTs.


A caulking die according to an embodiment of the present invention includes an end surface being connected to each of an upper surface and a lower surface. The end surface includes a first protruded part including a first top portion, a recessed groove, and a second protruded part including a second top portion in sequential order from the lower surface side toward the upper surface side. A length of the second top portion is larger than a length of the first top portion, and a height of the second protruded part is larger than a height of the first protruded part in a cross-sectional view perpendicular to a width direction of the end surface. A caulking tool includes the caulking die. A method for manufacturing a caulking joint uses the caulking tool.


Patent
NITTA Corporation | Date: 2016-12-02

A pressure measurement device includes a platen, a pressure sensor, a signal acquisition section, and a data processing section. The pressure sensor includes a plurality of pressure-sensitive points arranged on the platen. The signal acquisition section is configured to acquire measurement data that is obtained when a measurement object in contact with a surface of the platen passes over the pressure sensor a plurality of times. The measurement object moves relative to the platen and along a circular orbit on the platen. The data processing section is configured to calculate periods in each of which the measurement object passes over the pressure sensor and to acquire period data for each of the periods from the measurement data.


Patent
Nitta Corporation | Date: 2017-08-09

A heat-insulated pipe assembly (1) includes a pipe (2) allowing a fluid to flow therethrough, and a heat insulating member (3) covers at least a part of the pipe (2). The pipe (2) is used in an exhaust gas purification system using an SCR catalyst. The heat insulating member (3) has a closed-cell structure and suppresses an increase in a temperature of the fluid due to heat exchange with air. In the exhaust gas purification system using the SCR catalyst, the interior of the pipe (2) is thermally insulated from the exterior by the heat insulating member (3). Thereby an increase in the temperature of the fluid flowing through the pipe (2) due to heat exchange with air is suppressed.


Patent
Nitta Corporation | Date: 2017-03-22

An endless flat belt includes an inner rubber layer 1, a cord core 11 buried in the inner rubber layer 1 and spirally wound at a predetermined pitch in a width direction of the belt, and a reinforcement fabric 2 stuck to the inner rubber layer 1. The cord core comprises polyamide fiber. Opposite ends of the reinforcement fabric 2 are connected with each other into an endless form by adhesion or sewing. A surface rubber layer 3 is stuck to a surface of the reinforcement fabric 2 which is opposite a surface thereof stuck to the inner rubber layer 1.


There are provided an easily producible structure holding catalyst particles used for production of carbon nanotubes, and a method for producing the same. The method for producing the structure (11) holding catalyst particles of the present invention used for production of carbon nanotubes includes a step of forming a catalyst particle forming layer (3) containing Si, Al, and Fe, and a step of performing a heat treatment on the catalyst particle forming layer (3) in an atmosphere containing oxygen, to form catalyst particles (2) containing Fe. The catalyst particles are held by the catalyst particle forming layer so that the catalyst particles are partially embedded in the catalyst particle forming layer (3). The size and the number of the catalyst particles (2) containing Fe are controlled by adjusting the amount of oxygen contained in the atmosphere for the heat treatment. Thus, the structure (11) holding catalyst particles is formed easily.


Patent
Nitta Corporation | Date: 2016-10-28

In the belt according to the present invention, the whole or a part of a belt body is formed from a thermoplastic resin composition (C) comprising a thermoplastic resin W and a modified ethylene copolymer (B) dispersed and contained. therein. The modified ethylene copolymer (B) is preferably a copolymer, modified with an unsaturated carboxylic acid or a derivative thereof, of ethylene with at least one monomer component selected from (i) olefin components except for ethylene, (ii) diene components and (iii) ester components having an ethylenically unsaturated group. The belt according to the present invention hardly causes abrasion, damage, cracks, breakage and the like on the belt body and is remarkably excellent in durability, even if the belt is used at a high load for a long time.


Patent
Nitta Corporation | Date: 2017-06-07

A shaft structure installed in a shaft capable of making a power-transmission includes a male component having splines and spline bottoms on an outer periphery, a female component having splines and spline bottoms on an inner periphery and allows the male component to be slidably inserted in an axial direction thereby making up the shaft structure, and an elastic member covering the outer or inner periphery of the male or female component, wherein the female component has substantially U or V-shaped cross-section grooves on the outer periphery as opposed to splines, and a shape defined by the spline of the female component and the groove is such a shape that when the male or female component is twisted and a stress is applied to the spline in a direction around the shaft, the spline could be elastically deformed and absorb a maximum design stress within an elastic region.

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