Fluid handling – Destructible or deformable element controlled – Destructible element
Patent
1992-03-30
1993-03-16
Rivell, John
Fluid handling
Destructible or deformable element controlled
Destructible element
137 681, 1374933, 1374939, F16K 1740
Patent
active
051935694
ABSTRACT:
An emergency valve is provided to shut 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, flapper valve is mounted in the lower housing. A poppet 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. In one embodiment the check valve yieldingly engages a seat formed in the upper end of the upper housing, immediately above the notch and is opened by fuel flow pressure. In another embodiment the check valve is normally held open by a post projecting upwardly from a bridge mounted beneath the groove. In a third embodiment, the poppet valve is also held in an open position by a similar post and is engageable with a seat formed in the upper surface of the upper housing. 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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