Title:
【発明の名称】ピストン
Document Type and Number:
Japanese Patent JPS62501160
Kind Code:
A
Abstract:
A piston generates reduced noise in operation by the provision on its lateral bearing surfaces of two or more depressions in which oil is stored to provide a cushion against lateral movement of the piston at points of a reciprocation of the cycle where noise is generated. The depressions have a maximum depth of only 125 microns below the surrounding bearing surfaces formed on the piston. The depressions have circumferentially extending edges which are formed with steps connecting the depressions to the surrounding bearing surface.
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Inventors:
Rose, michael letham prince
Parker, Dave It Alek
Parker, Dave It Alek
Application Number:
JP50542085A
Publication Date:
May 07, 1987
Filing Date:
December 05, 1985
Export Citation:
Assignee:
E-P-Er-
International Classes:
F16J1/02; F02F3/00; F02F3/02; F04B39/00; F04B39/02; F16J1/08; F02B1/04; (IPC1-7): F16J1/02; F04B39/02; F04B39/00; F02F3/00
Attorney, Agent or Firm:
Toshio Yano