Seal Assembly with Protective Filter
AssigneeSKF USA Inc.
InventorAlex Paykin
Life of this patent
Estimating the term…
Abstract
A fluid seal assembly including a specialized protective filter unit which is adapted for use with a fluid seal, as well as to the combination of a protective filter unit with an associated seal unit to form a complete seal assembly. The seal provides increased reliability, particularly in those specialized seals wherein high internal pressure and the possibility of particulate contaminants are present.
Claims19
A fluid seal assembly including a fluid seal unit having an elastomeric seal body and a seal band defined by the meeting of air and oil side surfaces, said fluid seal being adapted to seal a reciprocable member, and a protective filter unit for said fluid seal unit, said protective filter lying on the oil said of said fluid seal, said fluid seal unit also including a relatively rigid, axially extending casing unit having an elastomeric outside diameter surface adapted to be snugly received within a seal counterbore, and an inside diameter elastomeric surface, said protective filter unit having an axially extending portion, a radially extending portion including a fine mesh filter screen, and radially innermost means adapted to contact said reciprocable member in particulate excluding relation, said axially extending portion of said protective filter unit snugly engaging said inside diameter elastomeric surface lying on said axially extending inner portion of said casing unit.
A fluid seal assembly including a fluid seal unit having an elastomeric seal body and a seal band defined by the meeting of air and oil side surfaces of said body, said fluid seal being adapted to seal a reciprocable member, and a protective filter unit for said fluid seal unit, said protective filter lying on the oil said of said fluid seal, said fluid seal unit also including a relatively rigid, axially extending casing unit having outside diameter surface adapted to be snugly received within a seal counterbore, and an inside diameter elastomeric surface for receiving a protective filter unit, said protective filter unit having an axially extending portion, a radially extending portion including a fine mesh filter screen, and radially innermost means adapted to contact said reciprocable member in particulate excluding relation, said axially extending portion of said protective filter unit snugly engaging said inside diameter elastomeric surface in oil tight relation.
A fluid seal assembly for sealing a reciprocable member said fluid seal including a rigid casing unit having radially and axially extending flanges, an elastomeric portion formed radially inside said axial flange, a seal body including a pocket in said body for receiving a back-up ring, and a sealing lip having a seal band where air and oil side frusto-conical surfaces meet, and a protective filter associated with said fluid seal, said protective filter lying on the oil side of said fluid seal, said protective filter including an axial flange portion of said protective filter non-removably received by said elastomeric portion, a radially extending portion having a fine mesh filter forming a part thereof and radially innermost means adapted to contact said reciprocable member in particulate excluding relation.
Dependencies are inferred from the claim text.