Packing gland assembly

Details Packing gland assembly Packing gland assembly

1978-08-25

1979-12-11

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 72FM, 277124, F16J 1540

Patent

active

041779983

ABSTRACT:
A packing assembly for a valve shaft or stem (8) consisting of inner and outer telescoping expander sleeves or rings (44, 46) slidably received intermediately in a stuffing box (32) between two groups of elastomeric sealing rings (F, G). Semi-fluid plastic sealing material is injected (60) between the expander rings to move them apart and thereby axially compress and radially expand the seal rings into sealing engagement with the stem or shaft and box wall. Portions of the plastic material pass through radial holes in the inner expander ring to form secondary seals within and about these rings.

REFERENCES:
patent: 574353 (1896-12-01), Jarlock
patent: 3199876 (1965-08-01), Magos et al.
patent: 3434728 (1969-03-01), Soldato
patent: 3776558 (1973-12-01), Maurer et al.
patent: 3785659 (1974-01-01), Maurer et al.
patent: 3823911 (1974-07-01), Natho et al.
patent: 3834715 (1974-09-01), Butler
patent: 3907307 (1975-09-01), Maurer et al.
patent: 4098561 (1978-07-01), Tschirky et al.

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