Safety valve for exposing a measuring probe to a fluid

Details Safety valve for exposing a measuring probe to a fluid Safety valve for exposing a measuring probe to a fluid

1979-10-01

1982-03-16

Krawczewicz, Stanley T.

Electricity: measuring and testing

Electrolyte properties

Using a conductivity determining device

G01N 2728

Patent

active

043203434

ABSTRACT:
A safety valve for exposing a measuring probe to a fluid comprising a hollow inner valve body with a valve seat movably positioned within a hollow outer valve body having a cooperating valve element for providing fluid-tight engagement when the valve is closed. The inner valve body partially extends from the outer valve body when the valve is open for passage of the fluid into an inner chamber for exposing the inserted probe to the fluid. The probe is secured to the inner valve body by a threaded cap, the movement of which is translated to the inner valve body in the presence of the probe for moving the inner valve body to the open valve position. The valve is prevented from being opened in the absence of the probe by a spring mounted on the outer valve body engaging a catch on the cap for restricting movement thereof preventing the valve from being opened. The valve is latched in the open and closed positions by a Z-shaped slot in the inner valve body cooperating with a guide pin mounted on the outer valve body. The spring further engages a catch in the cap when the inner valve body is in the open position for restricting probe-releasing movement of the cap thereby preventing removal of the probe while the valve is open.

REFERENCES:
patent: 2832039 (1958-04-01), Hardesty
patent: 2985821 (1961-05-01), Del Chiocca

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