Patent ID: 9605758
Date: 2017-03-28
CPC Classifications: F04B,F16J

Claim:
1. A reciprocating piston for a reciprocating piston compressor for generating compressed air for a vehicle, the reciprocating piston comprising: a piston body having a piston head, a piston skirt with piston skirt walls and pin bosses for receiving a gudgeon pin; a first ring groove being disposed closest to the piston head, a third ring groove being disposed closest to the piston skirt, a first piston ring being a compression ring disposed in the first ring groove and a second piston ring being an oil control ring disposed in the third ring groove; and a plurality of lands on the piston body, the plurality of lands including a land between the first ring groove and the third ring groove, a land on a side of the first ring groove distal from the third ring groove, and a land on a side of the third ring groove distal from the first ring groove, at least one of the plurality of lands being set back from a diameter of the piston body in the form of at least one recess at least over a partial section of a land height measured parallel to an axis of the piston body, wherein the at least one recess includes a depth, relative to the axis of the piston body, that varies continuously about the circumference of the recess.