A piston structure includes protection of the peripheral edge portion of a lubricant injection nozzle receptacle cut-out. The piston structure employs mechanisms for reinforcing the peripheral edge portion of the cut-out to an extent that can avoid concentration of the stress and thus can avoid the formation of cracks.
申请公布号
DE3917755(C2)
申请公布日期
1995.02.02
申请号
DE19893917755
申请日期
1989.05.31
申请人
ATSUGI MOTOR PARTS CO., LTD., ATSUGI, KANAGAWA, JP
