Rotary sealing means

Details Rotary sealing means Rotary sealing means

1974-12-05

1976-03-30

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

F16J 1538

Patent

active

039470458

ABSTRACT:
This rotary sealing means has a casing with spaced concentric inner and outer walls connected by an end wall, the latter having a shoulder adjacent the inner wall. A primary sealing element, composed of carbon or the like, is guided for nonrotative movement between the inner and outer walls, such element having a counterbore which forms a shoulder opposed to and spaced from the shoulder in the casing. A secondary sealing element is disposed in the space between the shoulders, such secondary element in one form of the invention being annular and having a plastic part of generally channel-shaped cross section with the open side facing inwardly so that fluid pressure applied thereto will tend to urge the flaps of the channel toward the shoulders. Spring means are also positioned between the flaps of the channel to initially urge the flaps toward the shoulders. Variations in the plastic channel and spring means may be provided to extend the usefulness of the seal.

REFERENCES:
patent: 2407218 (1946-09-01), Beier

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