Patent ID: 11920605
Assignee: BORGWARNER INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  H | IPC F  H

Claim 8:
9. The rotating machine as set forth in claim 1, wherein said carbon surface has a carbon ring inner diameter and a carbon ring outer diameter spaced from said carbon ring inner diameter radially away from said axis, wherein said mating surface has a land portion configured to contact said carbon surface between an inner mating diameter radially aligned with said carbon ring inner diameter with respect to said axis and an outer mating diameter radially aligned with said carbon ring outer diameter with respect to said axis, wherein said land portion has a land area between said inner and outer mating diameters, wherein said mating surface defines a plurality of grooved portions disposed about said axis, wherein said plurality of grooved portions have a grooved area between said inner and outer mating diameters, and wherein a ratio of said land area to said grooved area is between 1.3 and 2.9.