Valve with enclosed soft tip stem

Details Valve with enclosed soft tip stem Valve with enclosed soft tip stem

1977-03-04

1978-10-10

Rosenthal, Arnold

Valves and valve actuation

Sequential opening or closing of serial ports in single flow...

251332, 251333, F16K 134

Patent

active

041192966

ABSTRACT:
A needle valve having a stem movably carried in a body defining a flow chamber with the tip of the stem being provided with a soft movable valve portion adapted to have seating engagement with an annular valve seat of a body port. The soft movable valve element may be defined by a tubular sleeve formed of a cold flowable material. A tubular retainer is slidably carried about the sleeve to prevent undesirable radial expansion of the sleeve as a result of cold flow and to direct the cold flowed material of the sleeve inwardly about a retainer portion of the stem disposed within the body port when the sleeve is in seating engagement with the body seat. The retainer is arranged to limit the adjustment of the stem to a maximum inward position wherein a major portion of the sleeve is cold flowed into the body port.

REFERENCES:
patent: 934620 (1909-09-01), Mueller
patent: 2885176 (1959-05-01), Bryant
patent: 3290002 (1966-12-01), Self

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