Shaft seal assembly
AssigneeInpro Companies, Inc.
InventorDavid C. Orlowski
Life of this patent
Estimating the term…
Abstract
The improved shaft seal assembly is disclosed in having the sealing device lodged simultaneously in a female recess in the rotor and stator. The mating relationship of a solid deformable annular seal in opposed recesses in the stator and the rotor results in the rotor and stator being locked together thus preventing axial movement between the rotor and stator. The novel seal assembly will be a positive seal during operation and also will prevent leakage when at rest.
Claims12
A bearing isolator for sealing a rotating shaft exiting a housing comprising:
- a. a housing;
- b. a shaft extending through said housing;
- an annular stator member, said stator member includes means for affixing said stator to said housing;
- c. said stator member having a radial cavity in the surface face parallel to said shaft;
- d. an annular rotor member, said rotor member rotatively connected to said shaft and having a radial cavity in the surface face parallel to said shaft;
- e. said rectangular cavity in said stator is of different dimensions than the rectangular cavity in said rotor;
- f. a solid resilient annular elastomeric sealing member;
- g. The width of said rotor cavity shall be slightly less than the diametric cross-section of said elastomeric sealing member;
- h. said parallel surface faces overlapping with said cavities aligned and juxtaposed to form a single cavity;
- i. said solid resilient annular sealing member substantially occupying said single cavity to seal the housing interior from the environment external said housing.
A bearing isolator for sealing a rotating shaft exiting a housing comprising:
- a. a housing;
- b. a shaft extending through said housing;
- c. an annular stator member, said stator member including means for affixing said stator member to said housing;
- d. said stator member having a radial cavity therein on a surface face parallel to said shaft;
- e. a circular elastomeric sealing member;
- f. an annular rotor member;
- g. said stator radial cavity having a width slightly greater than the elastomeric sealing member diameter and a depth of said stator radial cavity approximately equal to one-half of the diameter of said sealing member;
- h. said rotor member rotatively connected to said shaft and having a radial cavity on a surface face parallel to said shaft, said rotar radial cavity having a width slightly less than said sealing member outside diameter and a depth approximately equal to the outside diameter of said sealing member;
- i. said cavities aligned and juxtaposed to form a single cavity;
- j. said elastomeric annular sealing member simultaneously occupying substantial portions of said cavities to axially lock the rotor and stator and seal the housing interior from the environment external of said housing.
A method of sealing a shaft bearing, the shaft rotatively extending from a housing, the method comprising:
- a. fixing a stator on a housing concentrically about the shaft;
- b. mounting a rotor sealed on the shaft in close relation to the housing for rotation with the shaft;
- c. The stator and rotor having overlapping radially spaced cylindrical surfaces;
- d. a cavity in the cylindrical surface of said rotor and a cavity in the cylindrical surface of said stator;
- e. said cavities designed to be aligned and juxtaposed to form a single cavity when said stator and said rotor are positioned on said shaft;
- f. forcing a solid resilient annular elastomeric seal member first into said rotor member cavity and then into the juxtaposed cavities by axial insertion of the rotor member into the stator member so that the sealing member always occupies space in both cavities and acts as a positive seal at rest between the rotor and stator surfaces while preventing axial, relative movement between said rotor with respect to said stator.
Dependencies are inferred from the claim text.