Kabushiki Kaisha Toshiba

Noritsugu Kawashima

Takayoshi Fujiwara

Yoichiro Tanaka

Masayuki Sagoi

Yoshinori Sone

Moriaki Shimoda

Kunio Sekine

Kazuhisa Sumida

A compressor includes a casing having an oil reservoir, a cylinder situated within the casing, a cylindrical rotary body situated eccentrically within the cylinder, the rotary body having first and second spiral grooves extending in opposite directions from the middle part of the rotary body to both ends of the rotary body, first and second spiral blades fitted in the first and second spiral grooves, the blades having outer peripheral surfaces brought into contact with the inner peripheral surface of the cylinder, dividing the space defined by the inner peripheral surface of the cylinder and the rotary body into a plurality of working chambers, thereby constituting first and second compression sections, wherein the first and second blades freely project from and retreat in the first and second spiral grooves in the radial direction of the rotary body, driving means for rotating the cylinder and the rotary body relative to each other, a first refrigerant passage formed in the rotary body and opening to an area between the first and second compression sections and to one axial end portion of the rotary body, and oil supply means having first and second oil supply holes opening respectively to the first and second compression sections, and supplying oil in the oil reservoir to the first and second compression sections via the first and second oil supply holes.

Fluid compressor having lubrication for two spiral blade compression

A magnetic recording medium in which a silicon nitride film is formed on a magnetic recording layer having an axis of easy magnetization in the direction essentially perpendicular to its own layer surface. The magnetic recording layer is a metallic magnetic film such as a Co-Cr containing alloy. The silicon nitride film is preferably in a state in which the number of nitrogen atoms is less than four thirds of the number of silicon atoms. A lubricant layer such as a layer of fluorocarbon can be formed on the silicon nitride film.

Magnetic recording medium

Growing community of inventors

Tokyo, Japan

Noritsugu Kawashima