Fluid handling – Destructible or deformable element controlled – Destructible element
Patent
1975-07-07
1976-12-28
Nilson, Robert G.
Fluid handling
Destructible or deformable element controlled
Destructible element
1376275, 251144, F16K 2703
Patent
active
039995674
ABSTRACT:
The valve includes an upper or inner portion housing, a first spring which acts on the top of a valve member and normally urges it into sealing engagement with a seat, and a lower or outlet portion carrying an actuator pin having an inner end which disengageably abuts the underside of the valve member and is actuated to lift the valve member against the biasing force of the first spring. The valve actuator pin has a vent passage extending from its inner end to atmosphere. When the actuator pin is actuated to open the valve, the valve member covers the inlet of the vent passage. When the valve is closed, a smaller second spring, carried on the inner end portion of the valve actuator pin, urges the inner end of the actuator pin away from the valve member, thereby opening the vent passage inlet so that the portion of the valve body below the valve member is vented to atmosphere. This permits the discharge conduit connected to the valve to be gravity drained after the valve is closed. In the event the valve outlet portion and/or components connected thereto are struck with a hard force, such as during a collision, a groove in the discharge portion just below the valve seat breaks. This allows the outlet portion and the actuator pin to separate and fall away so that the first spring either closes the valve or maintains the valve closed and accidental drainage of the tank truck is prevented.
REFERENCES:
patent: 2793653 (1957-05-01), Payne
patent: 3665946 (1972-05-01), Robinson
Milwaukee Valve Company, Inc.
Nilson Robert G.
LandOfFree
Tank truck safety valve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tank truck safety valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tank truck safety valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-143633