Fluid handling – Destructible or deformable element controlled – Destructible element
Patent
1990-02-09
1992-03-31
Rivell, John
Fluid handling
Destructible or deformable element controlled
Destructible element
137 681, 1374933, 1374939, F16K 1740
Patent
active
050998706
ABSTRACT:
An emergency valve shuts off the flow of fuel in the event a fuel dispenser is struck with sufficient force to rupture the fuel conduit means therefor. The valve comprises a lower housing connected to a source of pressurized fuel and an upper housing connected to conduit means which extend to a dispensing nozzle. The upper housing has a groove which defines the plane of a weakened portion. When the impacted with a relatively high lateral force, the portion of the upper housing, above the groove, will separate, or break away. A normally open, main control, is mounted in the lower housing. A check valve is mounted in the upper housing. When the separable portion of the upper housing breaks away, both the flapper valve and the check valve automatically close to minimize spillage of fuel. A bleed valve is provided to relieve pressure in the fuel conduit means to which the separable portion of the upper housing is connected, in the event a fire occurs upon its breaking away. Three embodiments illustrate alternate check valve constructions. The upper housing and check valve comprises a replacement unit which can be mounted on existing lower housing to provide the benefits of the present invention or to replace an upper housing when an accident occurs.
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Anderson Paul B.
Blasch Lawrence R.
Moore Glenn E.
Wood Chester W.
Dover Corporation
Rivell John
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