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:
Nov. 17, 1998
Filed:
Nov. 22, 1995
Kazuo Miyazawa, Iwata, JP;
Yamaha Hatsudoki Kabushiki Kaisha, Iwata, JP;
Abstract
A feature of the invention resides in a plating arrangement for a piston that reciprocates within a cylinder. The piston includes a generally cylindrical piston body. The piston body includes a piston head with a nickel plating and a piston skirt with a tin plating provided at the circumference of the piston body. At least one piston ring groove with a molybdenum disulfide plating is provided in the piston skirt at an upper portion of the piston body. A piston ring with a chromium and resin layer is disposed in each of the piston ring grooves. The piston body includes a piston pin hole that defines an inner diameter surface of the piston. The inner diameter surface has a molybdenum disulfide plating. The plating arrangement for the piston enhances lubrication of the piston. Additionally, the present invention includes a lubricating system for a two-cycle, crankcase compression, diesel engine, comprising a cylinder block and head assembly, the cylinder block and head assembly includes a plurality of cylinders, a piston disposed in each of said cylinders so as to reciprocate in an axial direction of said cylinders, and the oil includes a polyisobutane additive for further enhancing lubrication of the piston.