Fluid handling – Processes – Cleaning – repairing – or assembling
Patent
1989-11-01
1992-04-07
Walton, George L.
Fluid handling
Processes
Cleaning, repairing, or assembling
137315, 137544, 210234, 251 74, 251 76, F16K 4300, F16K 3144, F16K 5100
Patent
active
051018500
ABSTRACT:
A liquid shutoff safety interlock device is provided which ensures that fluid flow to a filter is stopped prior to filter removal without requiring the use of a complex and expensive filter valve assembly and without requiring any substantial modification of existing components. The invention is particularly, though not exclusively, adapted to fuel dispensing equipment supplied by a remote pump and installed with a filter above and an impact valve below each fluid supply inlet. The liquid shutoff safety device of the present invention is placed between the impact valve and the filter so that in one position the device blocks access to the end of the filter and in another position provides filter access while at the same time tripping the latch arm to close the impact valve.
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Dresser Industries Inc.
Walton George L.
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