Spherical valve seal piston detecting and locking arrangement

Details Spherical valve seal piston detecting and locking arrangement Spherical valve seal piston detecting and locking arrangement

1978-04-17

1980-03-25

Cline, William R.

Fluid handling

With indicator, register, recorder, alarm or inspection means

Position or extent of motion indicator

251164, 251188, 251172, 251315, F16K 4300

Patent

active

041945280

ABSTRACT:
A housing in which a locking tube is contained is threaded into a suitable threaded opening in the valve casing with the opening communicating with the interior of the casing adjacent the seal piston; the locking tube is threaded within the housing and is engageable with the seal piston to lock the seal piston against the valve insuring positive sealing engagement; a detector push-rod is axially movable within the locking tube and is spring loaded against the seal piston; when sealing has been effected, the push-rod effects the actuation of a limit switch to initiate the operation of a signal device.

REFERENCES:
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patent: 2857130 (1958-10-01), Brisbane
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patent: 3837357 (1974-09-01), Slaughter
patent: 3901474 (1975-08-01), Kubota
patent: 4006883 (1977-02-01), Hilsheimer
patent: 4044995 (1977-08-01), Kubota
patent: 4084608 (1978-04-01), Laignel et al.

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