Ball valve with removable means for retaining the axial seal

Details Ball valve with removable means for retaining the axial seal Ball valve with removable means for retaining the axial seal

2011-03-01

2011-03-01

Fristoe, Jr., John K (Department: 3753)

Valves and valve actuation

Rotary valves

Seat or interface seal

C251S315010, C251S363000

Reexamination Certificate

active

07896312

ABSTRACT:
A ball valve comprising:a valve body with a seat for housing a ball provided with a coaxial through-opening and able to be rotationally operated from a closed valve position into an open valve position and vice versa;two opposite end flanges which are constrained to the valve body on opposite sides of the ball and provided with a respective, coaxial, internal hole and are suitable for connection to respective pipe sections;sealing means arranged between the valve body and the ball and comprising an annular member which is coaxial with the longitudinal axis (X-X) and carries an axial seal housed inside an associated axial seat inside which it is partially inserted in order to interfere with the outer surface of the ball, comprising a coaxial ring axially constrained to the annular seal-carrying member and interfering in the transverse direction (Y-Y) with a front surface portion of the seal in order to retain the latter in the axial direction.

REFERENCES:
patent: 3109623 (1963-11-01), Bryant
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patent: 3335999 (1967-08-01), Lowrey
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patent: 4155536 (1979-05-01), Saiki
patent: 4277047 (1981-07-01), Zinnai
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patent: 5170993 (1992-12-01), Bonetti
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patent: 2 745 353 (1997-08-01), None
patent: 2 135 431 (1974-08-01), None
patent: 55-63061 (1980-05-01), None
patent: WO 01/38761 (2001-05-01), None

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