Patent ID: 11879447
Assignee: WAUKESHA BEARINGS CORPORATION
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 17:
18. A reciprocating gas compressor system comprising:
a piston rod movable from a first end to a second end of the compressor system, and wherein a gas compressor system is defined at the second end of the compressor system; and
a packing case assembly comprising:
a packing cup disposed along the piston rod; and
a packing ring set disposed in the packing cup, the packing ring set comprising multiple rings, wherein the packing ring set is disposed circumferentially around a portion of a length of the piston rod,
wherein a composite backup packing ring of the packing ring set comprises:
a first region comprising a polymer; and
a second region comprising a metal,
wherein an inner surface of the composite backup packing ring is configured to face the piston rod;
the first region extends along at least a portion of the inner surface; and
the second region is disposed circumferentially around at least a portion of the first region.