Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1975-07-07
1977-02-15
Aegerter, Richard E.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 93R, F16K 4100
Patent
active
040079406
ABSTRACT:
An improvement in a mechanical seal assembly for a slurry pump, or like shaft rotating in a housing subject to incursions of grit contaminants of the type having relatively rotating first and second seal elements in annular engagement defining the seal, the first of the seal elements comprising telescopically interfitted inner and outer cylindrical members having seal-wear-responsive extensile movement to maintain sealing engagement with the second seal element, the grit contaminants tending to work between the first element inner and outer members and block their telescoping movement; the improvement comprising a rigid cylindrical shroud axially opposing and radially enclosing the first element concentrically for a substantial distance against grit contamination blocking inner and outer member telescoping movement.
REFERENCES:
patent: 2856210 (1958-10-01), Schoenrock
patent: 3420535 (1969-01-01), Hershey
patent: 3612548 (1971-10-01), Tracy
Aegerter Richard E.
Bachand Louis J.
Footland L.
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