B - Operations – Transporting – 65 – D
Patent
B - Operations, Transporting
65
D
B65D 88/54 (2006.01) F04F 3/00 (2006.01)
Patent
CA 2357166
A secondary shut off valve for a vacuum operated liquid tank includes a vessel having a top end and a divider which divides the vessel into an inlet chamber and an outlet chamber. An inlet extends through the top end of the vessel providing ingress to the inlet chamber. An outlet extends through the top end of the vessel providing egress from the outlet chamber. A fluid passage extends through the divider at the bottom end of the vessel, thereby permitting communication between the inlet chamber and the outlet chamber. A vertically aligned cylindrical body with a cylindrical passage is in communication with the outlet. A sealing seat is positioned at an upper remote end of the passage at the outlet. A floatation ball is disposed in the passage, such that as liquid rises in the outlet chamber, the ball floats up the passage into engagement with the sealing seat to shut off the outlet.
Landmark Oilfield Rentals & Services Ltd.
Thompson Lambert Llp
LandOfFree
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