Ball valve assembly

Details Ball valve assembly Ball valve assembly

1974-10-29

1976-07-20

Schwadron, Martin P.

Valves and valve actuation

Mechanical movement actuator

Particularly packed or sealed

251288, 251315, F16K 3144

Patent

active

039702855

ABSTRACT:
A ball valve assembly including an easily replaceable stem seal capable of utilization as a primary or secondary seal in a closed circuit system such as a refrigeration circuit or the like where it is (a) not feasible to open the system for changing a leaky seal, or (b) not easy to remove a stem seal from a deep thin annular recess immediately adjacent the valve stem. In the assembly of the invention, the stem seal is located on the valve body between it and a control housing portion which encloses the outer part of the valve stem and packing. A part of the control housing portion may also be rotatably connectable to the valve stem and have external lever means for opening and closing the valve without separating the part from the valve body.

REFERENCES:
patent: 2912217 (1959-11-01), Freeman et al.
patent: 2925243 (1960-02-01), Griswold
patent: 2994341 (1961-08-01), Leopold, Jr. et al.
patent: 2995336 (1961-08-01), Usab
patent: 3154094 (1964-10-01), Bredtschneider et al.
patent: 3239191 (1966-03-01), Widera
patent: 3269698 (1966-08-01), Koch
patent: 3331528 (1967-07-01), Racek
patent: 3696962 (1972-10-01), Fehres et al.

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