PISTON UNIT, TOP LAND MEMBER, AND COMBINATION OF PISTON UNIT PARTS

Title:

PISTON UNIT, TOP LAND MEMBER, AND COMBINATION OF PISTON UNIT PARTS

Document Type and Number:

WIPO Patent Application WO/2023/188834

Kind Code:

A1

Abstract:

This piston unit, which reciprocates in a cylinder, comprises a piston and a top land member mounted to the piston. The piston has a first portion that includes an end part of a side of one end face of the piston and on which the top land member is mounted. The first portion has a smaller outer diameter than a second portion of the piston excluding the first portion such that a step is formed between the first portion and the second portion. The top land member has a groove wall-forming surface opposing a step surface connecting the outer circumferential surface of the first portion and the outer circumferential surface of the second portion, and a first ring groove is demarcated by the groove wall-forming surface, the step surface, and the outer circumferential surface of the first portion.

More Like This:

JPS6117273	[Title of the device] A manufacture device of the piston for internal-combustion engines
JPS604392	[Title of the Invention] A ring shape reinforcement object for piston ring A groove of a light metal piston
JP2000027993	PISTON FOR INTERNAL COMBUSTION ENGINE AND SURFACE TREATING METHOD THEREFOR

Inventors:

NAGAKURA HIROYUKI (JP)
INAMORI SHUICHI (JP)
KAWAI KIYOYUKI (JP)

Application Number:

PCT/JP2023/003944

Publication Date:

October 05, 2023

Filing Date:

February 07, 2023

Export Citation:

Click for automatic bibliography generation Help

Assignee:

TPR CO LTD (JP)

International Classes:

F02F3/00; F02F5/00; F16J1/00; F16J9/00

Foreign References:

JPS63230947A	1988-09-27
JPS6153543U	1986-04-10

Attorney, Agent or Firm:

IP Firm SHUWA (JP)

Download PDF:

View/Download PDF PDF Help

Previous Patent: OPTICAL CONNECTOR

Next Patent: UNIDIRECTIONAL COMPOSITE, SPAR CAP, AND WINDMILL BLADE