Self-contained anti-blowout seal for fluids or gases
AssigneeBal Seal Engineering, Inc.
InventorJohn W. Schroeder
Life of this patent
Estimating the term…
Abstract
A self contained anti-blowout seal includes a seal jacket having a static seal surface and a dynamic seal lip with a cavity therebetween. A retaining ring is provided and disposed, in part, within a cavity of the seal jacket and proximate the static seal surface for pressing the static seal surface against a mounting surface. The retaining ring includes a surface extending outside the cavity for bearing against a mounting surface and a depending portion is provided which extends over the cavity opening and includes at least one port communicating with the cavity for enabling a sealing medium to enter and exit the cavity as the seal is pressure energized. A biasing element is provided and disposed in the cavity for forcing the dynamic seal lip against a moving member.
Claims18
A self-contained anti-blowout seal comprising:
- a seal jacket having a static seal surface and a dynamic seal lip with a cavity therebetween, said cavity being open to one side of said seal jacket;
- a retaining ring, disposed in part, within said cavity and proximate said static seal surface for pressing said static seal surface against a mounting surface, said retaining ring having a surface, extending outside of said cavity, for bearing against said mounting surface and a depending portion extending over the cavity opening, said depending portion having at least one vent hole communicating with said cavity for enabling a sealing media to enter and exit said cavity as the seal is pressure energized;
- a ledge extending from the retaining ring depending portion and engaging said dynamic seal lip, for preventing seal lip blowout;
- and
- a biasing element disposed in said cavity for forcing said dynamic seal lip against a moving member.
A self-contained anti-blowout seal comprising:
- a seal jacket having a static seal surface and a dynamic seal lip with a cavity therebetween, said cavity being open to one side of said seal jacket;
- a retaining ring, disposed in part, within said cavity and proximate said static seal surface for pressing said static seal surface against a mounting surface, said retaining ring having a surface, extending outside of said cavity, for bearing against said mounting surface, a biasing surface for preventing longitudinal movement of the seal and a depending portion extending over the cavity opening, said depending portion having at least one vent hole communicating with said cavity for enabling a sealing media to enter and exit said cavity as the seal is pressure energized;
- a snap-in backup ring disposed between a heel portion of said seal jacket and said moving member for preventing the seal lip from bending toward said moving member;
- a ledge extending from the retaining ring depending portion and engaging said dynamic seal lip, for preventing seal lip blowout;
- and
- a biasing element disposed in said cavity for forcing said dynamic seal lip against a moving member.
Dependencies are inferred from the claim text.