The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 22, 1992
Filed:
Dec. 09, 1991
Masahiro Iio, Konan, JP;
Diesel Kiki Co., Ltd., Tokyo, JP;
Abstract
A compressor has a cylinder formed of an aluminum alloy, and a moving member slidably received within the cylinder. Hard particles are dispersed in the inner peripheral surface portion of the cylinder. The hard particles are formed of a chemical compound such as a nitride and a carbide. The cylinder is manufactured by preparing a first green compact formed of a mixture of a powdery material for the aluminum alloy and the hard particles and a second green compact formed solely of the powdery material, preparing a billet having an inner layer formed of the first green compact, and an outer layer formed of said second green compact, placing the billet in a preheated state into a container and further heating same therein, and fitting a mandrel through a central bore of the billet and pressurizing the billet to extrude same through a die hole in a die.