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    • 4. 发明授权
    • Pistons and piston castings
    • 活塞和活塞铸件
    • US4730547A
    • 1988-03-15
    • US598678
    • 1984-04-10
    • Edward J. Murray
    • Edward J. Murray
    • F16J1/00F01B31/10F16J1/02
    • F16J1/02
    • A piston casting for forming a piston for an internal combustion engine or compressor comprises a generally cylindrical crown (10) having a ring belt (11) extending around the crown for the formation therein of one or more piston ring grooves. A gudgeon pin bore (14) extends through the piston casting in a direction normal to the piston axis and two opposed skirt thrust surfaces (17) depend from the ring belt and are symetrically disposed about a plane including the piston axis and normal to the gudgeon pin bore axis. The surfaces extend only part the way around the piston casting and terminate in respective spaced generally axially extending edges (18), each skirt thrust surface being extended circumferentially beyond the associated edges (at 19) at the ends of the edges remote from the crown.
    • 用于形成用于内燃机或压缩机的活塞的活塞铸件包括具有环形带(11)的大致圆柱形的冠(10),所述环形带围绕冠形延伸,用于在其中形成一个或多个活塞环槽。 舵杆销孔(14)沿着垂直于活塞轴线的方向延伸穿过活塞铸件,并且两个相对的裙部推力表面(17)从环形带取向并且围绕包括活塞轴线并且垂直于舵杆的平面对称设置 销孔轴。 这些表面仅部分地围绕活塞铸件延伸并终止在相应的间隔开的大致轴向延伸的边缘(18)中,每个裙部推力表面在远离表冠的边缘的端部周向延伸超出相关联的边缘(在19处)。