Hitachi Construction Machinery Co., Ltd.

Hitachi, Ltd.

Kiyoshi Tanaka

Morio Tamura

Ken Ichiryu

Hisayoshi Hashimoto

Kazuyoshi Hatano

Fujio Sato

Shinji Tanaka

Kazuo Sato

Hiroshi Kanda

Isao Ishikawa

Kuninori Imai

Takeji Shiokawa

Shigeo Kato

Harumasa Onozato

Nobuyuki Tobita

Ken Ichiryuu

Takao Kawanuma

Hisanobu Kanamaru

Kouji Harada

Fujio Satou

A guide roller assembly for use in a guide roller mechanism of a crawler type vehicle, including a support shaft fixedly provided on a truck frame and a guide roller rotatably mounted on the support shaft through bearings. The guide roller has an integral unitary body structure of a stepped cylindrical shape having a radially bulged portion formed integrally by plastic deformation in an axially intermediate portion between cylindrical end portions of a smaller diameter, and having a uniform wall thickness over the entire length of the guide roller. The guide roller is improved in strength and can realize a substantial cut in production cost.

Guide roller assembly for crawler type vehicles and method for forming

A seal structure in which a hole (5) is defined by a metal base member (4) as a partition member for partitioning the regions on the opposite sides thereof to a gas tight or liquid tight state and a member passes through the hole (5) and extends therefrom. The member passing through the hole (5) may be an electric conductor (2), a pipe member for flowing gas or liquid, a heat pipe for flowing a heat medium, an optical fiber for transferring an optical signal, or the like, and the structure is arranged such that the member passing through the hole is disposed through a synthetic resin seal member (3) and the hole (5) is sealed based on the confinement effected by the plastic deforming action of the base member (4) and the deforming action of the seal member (3) effected by making use of the elastic plasticity thereof, whereby the structure exhibits an excellent pressure resistive performance and can effectively seal the hole (5).

Seal structure for member-passing-through hole bored in metal partition

Pressure sensor

An ultrasonic probe comprising an acoustic lens (20) having a concave lens surface (21) formed on one side of a lens body, and a piezoelectric transducer (23) disposed on the other side of the acoustic lens, ultrasonic waves generated by applying voltage to the piezoelectric transducer being focused through the lens surface to detect the reflected waves of the ultrasonic waves from a sample (26) by the piezoelectric transducer for obtaining information about the surface or interior of the sample. The lens surface (21) of the acoustic lens (20) is defined by an etch profile (15) formed by etching a substrate material (11) which makes up the lens body.

Ultrasonic probe

Ultrasonic probe and manufacture method for same

Growing community of inventors

Mizukaido, Japan

Kiyoshi Tanaka