公开(公告)号：US11007572B2

公开(公告)日：2021-05-18

申请号：US15753205

申请日：2016-07-19

Applicant: NTN CORPORATION

Inventor： Yoshinori Ito ,  Hajime Asada ,  Hiroshi Akai ,  Kei Hattori

IPC: B22F3/24 ,  C22C33/02 ,  C21D1/06 ,  C23C8/22 ,  C22C38/22 ,  C22C38/00 ,  C21D1/46 ,  C22C38/50 ,  C23C8/02 ,  C23C8/56 ,  C23C28/04 ,  C23C8/32 ,  C23C8/80 ,  C23C8/26 ,  C23C8/34 ,  B22F5/00 ,  C23C8/50 ,  B22F5/10

Abstract: A sliding member (1) includes an iron and steel-based sintered compact containing chromium, molybdenum, and carbon and having a content of chromium, of 5 mass % or less. The sliding member (1) includes: a compound layer (11) which has a sliding surface (1a) and is formed mainly of an iron and steel nitride; and a diffusion layer (12) which is adjacent to the compound layer (11) and has an iron and steel structure into which nitrogen and carbon diffuse. The concentrations of carbon and nitrogen in the diffusion layer (12) are gradually reduced with increasing depth from the sliding surface (1a).

公开(公告)号：US10355364B2

公开(公告)日：2019-07-16

申请号：US15754682

申请日：2016-08-31

Applicant: NTN CORPORATION

Inventor： Tomokazu Sonozaki ,  Hiroshi Akai ,  Kei Hattori

IPC: H01Q21/00 ,  H01Q21/06 ,  H01Q13/18 ,  H01P3/12 ,  H01P11/00

Abstract: A waveguide tube slot antenna (1) includes a waveguide tube (10) that is made of a resin and includes a waveguide (2) extending in a tube axis direction; and a plurality of radiating slots (3) provided in the waveguide tube (10). The waveguide tube (10) includes first and second waveguide tube forming members (11 and 12) each having a traverse section having a shape with an end at each part in an extending direction of the waveguide (2), and is configured to define the waveguide (2) by being coupled to each other. The waveguide tube slot antenna (1) includes metal cores (20) disposed along the tube axis direction, and the metal cores (20) are held by both the waveguide tube forming members (11 and 12).

公开(公告)号：US20150043844A1

公开(公告)日：2015-02-12

申请号：US14385865

申请日：2013-03-18

Applicant: NTN CORPORATION

Inventor： Masaharu Hori ,  Hiroshi Akai ,  Tetsuya Kurimura ,  Fuyuki Ito

IPC: F16C32/06

Abstract: Provided is a sintered metal bearing, which is formed of raw material powder containing copper-based powder and iron-based powder as main components, the sintered metal bearing including a radial bearing surface along an inner periphery thereof. The copper-based powder includes fine copper powder exhibiting a particle size distribution in which a ratio of particles with a diameter of less than 45 μm is 80 wt % or more, the fine copper powder occupying one-third or more of a whole of the copper-based powder in terms of a weight ratio. A compressed body formed by compressing the raw material powder is sintered at 900° C. or more to 1,000° C. or less.

Abstract translation: 提供一种烧结金属轴承，其由含有铜基粉末和铁基粉末作为主要成分的原料粉末形成，该烧结金属轴承包括沿其内周的径向支承表面。 铜基粉末包括细小的铜粉末，其具有直径小于45μm的颗粒的比例为80重量％以上的粒度分布，占细粉末总数的三分之一以上的细铜粉末 铜基粉末的重量比。 通过压缩原料粉末形成的压缩体在900℃以上1000℃以下烧结。