Patent ID: 6315302
Filing Date: 2001-11-13
Classification: F16J

Abstract:
A rotary seal device comprising:a generally ring-shaped interference-type rotary seal (2) defining a seal volume (""S"") and defining a mean seal diameter (""Dm"") and further comprising:i. a solid generally circular seal body (5) composed of sealing material and defining a first seal body end (26) and a second seal body end (28);ii. a static sealing surface (14) being defined by said solid generally circular seal body (5),iii. at least one compression-type dynamic sealing lip (16) projecting from said solid generally circular seal body (5) by a projection dimension (P) and being oriented in generally opposed relation to said static sealing surface (14), and defining a dynamic sealing surface (18) having a variable width,iv. said compression-type dynamic sealing lip (16) providing a non-circular shape for rotation-induced hydrodynamic lubrication of said dynamic sealing surface (18),v. said static sealing surface (14) being separated from said dynamic sealing surface (18) by a seal depth (D), and said first seal body end (26) being separated from said second seal body end (28) by a seal width (L);vi. said seal volume (S), when divided by the product of seal width (L) times said seal depth (D) times said mean seal diameter (Dm) times 3.1416, yields a quotient of less than 0.84.