Oiles Corporation

Honda Motor Co., Ltd.

Honda Giken Kogyo Kabushiki Kaisha

Tokyo Denki University Oiles Corporation

Go Tanaka

Akihiko Okimura

Kazuhiro Nagashima

Yoshikazu Arai

Teruo Aramizu

Mitsuru Miyazaki

Keita Ito

Takao Kobayashi

Tadafumi Hirose

Ikuo Shimoda

Shigeru Shudo

Hideo Ozawa

Hirohisa Ishikawa

Ryosuke Shibata

Satoshi Fujita

Yoshikazu (deceased) Arai

Hiroshisa Ishikawa

A friction damper includes: a base body; a support secured to an elongated member of the base body and having a through hole; a rod which extends in such a manner as to pass through the through hole of the support and is movable in an axial direction with respect to the support; a friction member which has a hollow cylindrical portion interposed between the support and a main body portion of the rod in the through hole of the support, and which is fixed immovably with respect to the relative movement of the rod in the axial direction with respect to the base body; and a tightening means provided for the support so as to tighten the hollow cylindrical portion of the friction member onto the main body portion of the rod.

Friction damper

A friction damper includes a base body; a support secured to an elongated member of the base body and having a through hole; a rod which extends in such a manner as to pass through the through hole of the support and is movable in an axial direction with respect to the support; a friction member which has a hollow cylindrical portion interposed between the support and a main body portion of the rod in the through hole of the support, and which is fixed immovably with respect to the relative movement of the rod in the axial direction with respect to the base body; and a tightening structure provided for the support so as to tighten the hollow cylindrical portion of the friction member onto the main body portion of the rod.

A hydraulic pressure spring includes a hollow cylindrical cylinder having a threaded portion at one end thereof; a closure means which is threadedly engaged with the threaded portion at the one end of the cylinder and closes the one end of the cylinder; a closure means which is provided at the other end of the cylinder and closes the other end of the cylinder; a compressible liquid which is sealed in an interior of the cylinder and is pressurized to a predetermined pressure; a rod which is passed through the closure means movably in an axial direction A and causes the liquid in the interior of the cylinder to undergo a pressure rise as the rod enters the interior of the cylinder; and a piston disposed in the interior of the cylinder and attached to one end of the rod.

Hydraulic pressure spring and method of manufacturing the same

A hydraulic pressure springincludes a hollow cylindrical cylinderhaving a threaded portionat one endthereof; a closure meanswhich is threadedly engaged with the threaded portionat the one endof the cylinderand closes the one endof the cylinder; a closure meanswhich is provided at the other endof the cylinderand closes the other endof the cylinder; a compressible liquidwhich is sealed in an interiorof the cylinderand is pressurized to a predetermined pressure; a rodwhich is passed through the closure meansmovably in an axial direction A and causes the liquidin the interiorof the cylinderto undergo a pressure rise as the rodenters the interiorof the cylinder; and a pistondisposed in the interiorof the cylinderand attached to one end of the rod

The present invention is intended to provide a seismic isolation device which, regardless of a load to be supported, is capable of reducing acceleration through lengthening a natural period of an upper structure, with excellent vibration energy absorbing capacity by obtaining a properly preferable frictional force as well as a returning characteristic, and others.

Seismic isolation device and seismic isolation structure

A friction damper includes: a base body; a support secured to an elongated member of the base body and having a through hole; a rod which extends in such a manner as to pass through the through hole of the support and is movable in an axial direction with respect to the support; a friction member which has a hollow cylindrical portion interposed between the support and a main body portion of the rod in the through hole of the support, and which is fixed immovably with respect to the relative movement of the rod in the axial direction with respect to the base body; and a tightening device provided for the support so as to tighten the hollow cylindrical portion of the friction member onto the main body portion of the rod.

In a cylinder head lubricating structure for an engine, in which a breather passage which guides, toward a cylinder head, gas including oil mist generated in a crank chamber by oil splashing means housed in the crank chamber so as to splash-oil in accordance with rotation of a crankshaft is formed in a crankcase, a cylinder block and the cylinder head to supply, toward the cylinder head, lubricating oil through the breather passage, a breather chamber with which an end portion, on the crank chamber side, of the breather passage communicates is formed in the crankcase, and a one-way valve preventing backflow of the oil toward the crank chamber is attached to the crankcase to be located between the crank chamber and the breather chamber. Accordingly, it is possible to supply a sufficient amount of oil to the cylinder head side even when the head difference between the crank chamber and the cylinder head is large.

Cylinder head lubricating structure for engine

An engine generator including an engine, a generator and an air cleaner inside a case is disclosed. A wall section of the case is dented in the internal direction of the case to provide a filter accommodation section with a space for accommodating a filter. The space has an opening that opens toward the exterior of the case. The filter accommodation section has an outside-air intake port. The opening is blocked by an air cleaner cover.

Engine generator

In a system for lubricating a valve-operating mechanism in an engine including a head cover coupled to an upper end of a cylinder head, and a valve-operating chamber defined between the cylinder head and the head cover. An oil mist transfer means for transferring an oil mist in an oil tank, an oil recovery chamber for recovering the oil accumulated in the valve-operating chamber by suction and a breather chamber into which a blow-by gas is introduced from the valve-operating chamber lead to the valve-operating chamber. In the lubricating system, a gas-liquid separating chamber for separating oil drops from the oil mist fed from the transfer means to guide the oil mist containing no oil drops to the valve-operating chamber is disposed between the transfer means and the valve-operating chamber. Thus, the oil mist containing no oil drops can be supplied to the valve-operating chamber to lubricate the valve-operating mechanism without a resistance.

Growing community of inventors

Ashikaga, Japan

Go Tanaka