Title:
CYLINDER
Document Type and Number:
WIPO Patent Application WO/2023/067833
Kind Code:
A1
Abstract:
Provided is a cylinder having grooving in a cylinder inner circumferential surface. The grooving includes a honed groove and a recessed groove having a larger groove width and a larger groove depth than the honed groove. The honed groove and the recessed groove extend in a cylinder circumferential direction and have an inclination angle in relation to a direction perpendicular to the cylinder axial direction. In a sliding region of an oil ring when a crank angle is from 50º to 140º, the cylinder inner circumferential surface is such that, in the cylinder axial direction, a length of 4 mm in which the recessed groove is present in four or more places can be selected.
Inventors:
OIZUMI TAKASHI (JP)
TAMAKI SEIJI (JP)
KAWAI KIYOYUKI (JP)
TAMAKI SEIJI (JP)
KAWAI KIYOYUKI (JP)
Application Number:
PCT/JP2022/018684
Publication Date:
April 27, 2023
Filing Date:
April 25, 2022
Export Citation:
Assignee:
TPR CO LTD (JP)
TPR IND CO LTD (JP)
TPR IND CO LTD (JP)
International Classes:
F02F1/00; F16J10/04
Foreign References:
| JPS5643441U | 1981-04-20 | |||
| JP2019078267A | 2019-05-23 |
Attorney, Agent or Firm:
IP FIRM SHUWA (JP)
Download PDF:
Previous Patent: FERRULE HOLDING STRUCTURE
Next Patent: MANUFACTURING METHOD FOR TOBACCO SHEET FOR NON-COMBUSTION HEATING-TYPE FLAVOR INHALER
Next Patent: MANUFACTURING METHOD FOR TOBACCO SHEET FOR NON-COMBUSTION HEATING-TYPE FLAVOR INHALER