초록 ▼

A seal for preventing leakage around a rotary shaft extending through a structural casing comprising an annular stationary rigid seal secured to the structural casing for surrounding the rotary shaft. The stationary rigid seal has a smooth sealing surface for establishing a seal, and a resilient rot

A seal for preventing leakage around a rotary shaft extending through a structural casing comprising an annular stationary rigid seal secured to the structural casing for surrounding the rotary shaft. The stationary rigid seal has a smooth sealing surface for establishing a seal, and a resilient rotary seal adapted to be secured to the rotary shaft and having an annular projecting edge for contacting the smooth sealing surface under a biased pressure to form a seal in conjunction therewith. The projecting edge is formed by the convergence of inner and outer forward surfaces. A radial surface extends to the inner concentric forward surface from a torque point at its forward cylindrical base. An outer rearward surface extends to the outer concentric forward surface from a pivot point at its rearward cylindrical base. The outer forward surface forms an angle with the central axis of the seal in a plane through the central axis of the seal of from 40°to 60°. The inner concentric forward surface and the outer rearward surface forms angles with the central axis of the seal in a plane through the central axis of the seal which are individually within the range of from 45°to 60°. A line extending in a plane through the central axis of the seal from the pivot point to the projecting edge is within the range of from 16°to 21°.

대표청구항 ▼

A seal for preventing leakage around a rotary shaft extending through a structural casing comprising an annular stationary rigid seal secured to the structural casing for surrounding the rotary shaft, the stationary rigid seal having a smooth sealing surface for establishing a seal, and a resilient

A seal for preventing leakage around a rotary shaft extending through a structural casing comprising an annular stationary rigid seal secured to the structural casing for surrounding the rotary shaft, the stationary rigid seal having a smooth sealing surface for establishing a seal, and a resilient rotary seal adapted to be secured to the rotary shaft and having an annular projecting edge means for contacting the smooth sealing surface under a biased pressure to form a seal in conjunction therewith, the projecting edge means being formed by the convergence of inner and outer forward surfaces of said resilient rotary seal, a radial surface of said resilient rotary seal extending to the inner forward surface from a torque point at its forward cylindrical base, an outer rearward surface of said resilient rotary seal extending to the outer forward surface from a pivot point at its rearward cylindrical base, the outer forward surface forming an angle, E, with a central axis of the seal in a plane through the central axis of the seal of from 40°to 60°the inner forward surface and the outer rearward surface forming angles with the central axis of the seal in a plane through the central axis of the seal which are individually within the range of from 45°to 60°and a line extending in a plane through the central axis of the seal from the pivot point to the projecting edge means, G, being within the range of from 16°to 21°.