Control valves

Details Control valves Control valves

1977-08-16

1980-01-15

Cline, William R.

Valves and valve actuation

Hermetic flexible wall seal for actuator

251324, 251214, F16K 104

Patent

active

041835000

ABSTRACT:
In a valve for controlling fluid flow, the spindle comprises a flexible polymeric sheath, preferably PTFE, around the end of a stem, the sheath having a tubular portion suspended clear of the stem and having an oversize external ridge which is accommodated within the bore by flexing of the tubular portion, resistance to this flexing serving to bias the external ridge against the surrounding body to provide a gland seal.

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patent: 3062496 (1962-11-01), Stehlin
patent: 3117595 (1964-01-01), Broecker et al.
patent: 3144042 (1964-08-01), Glauber
patent: 3184216 (1965-05-01), Lovell
patent: 3315696 (1967-04-01), Hunter
patent: 3443589 (1969-05-01), Benedetti
patent: 3484084 (1969-12-01), Simpson et al.
patent: 3528087 (1970-09-01), Perkins
patent: 3688798 (1972-09-01), Nightingale et al.
patent: 3747479 (1973-07-01), Nightingale et al.
patent: 3904174 (1975-09-01), Giese
patent: 3985155 (1976-10-01), Nightingale et al.
patent: 3993099 (1976-11-01), Nightingale

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