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Piston ring

  • US 9,133,933 B1
  • Filed: 10/28/2013
  • Issued: 09/15/2015
  • Est. Priority Date: 10/26/2012
  • Status: Active Grant
First Claim
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1. A piston ring for a reciprocating compressor, comprising a one-piece sealing ring, extending in a circumferential direction around a middle point with an axial direction, with an outer face extending in an arcuate manner, wherein the sealing ring has a straight cut joint with joint ends and also a gap extending in the circumferential direction between the joint ends, and also comprising a joint lock for sealing the gap, wherein the joint lock is designed symmetrically with regard to a symmetry plane, wherein the joint lock, starting from the symmetry plane, has two leg sections extending on both sides in the circumferential direction, wherein the two joint-lock leg sections altogether extend over an angular range of between 20°

  • and a maximum of 180°

    , and wherein the joint-lock leg sections have a radially outwardly oriented outer side extending in an arcuate manner, and wherein the joint lock, starting from the symmetry plane, has a contact section extending on both sides in the circumferential direction and projecting in the axial direction over the joint-lock leg sections, wherein the contact section extends in the circumferential direction only over a partial angle of the two joint-lock leg sections, and wherein the contact section has a radially outwardly oriented contact face, and wherein the contact face extends in a set back manner in the radial direction with regard to the leg-section outer side so that the joint-lock leg sections along the contact face form a stop which is oriented in the axial direction, wherein the sealing ring and the joint lock are of a mutually matched design in such a way that in the assembled state the joint lock butts laterally against the sealing ring via the stop, and in such a way that the contact face of the contact section extends along the gap and covers this in the circumferential direction.

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