Fluid handling – Processes – With control of flow by a condition or characteristic of a...
Patent
1996-11-22
1998-11-03
Walton, George L.
Fluid handling
Processes
With control of flow by a condition or characteristic of a...
137 38, 137403, 137413, 137414, 137430, 141 1, 141198, 222 55, 222 67, F16K 3122, F16K 31383, F16K 31385
Patent
active
058294651
ABSTRACT:
A device, and a container having such a device, is provided for permitting filling the container with a predetermined weight of the fluid. The device and container include a main channel to introduce the fluid into the container at a fill pressure; a detector mechanism to detect a "filled" condition based on fluid weight; and an fluid-weight control mechanism to automatically prevent introducing fluid into the container in excess of the "filled" condition. A compression spring offsets part of the weight of a displacer such that the displacer becomes buoyant as the container becomes "filled". The displacer has a seat mechanism that sealingly engages an orifice mechanism creating a differential pressure, substantially less than the fill pressure, across a control device causing closure of the main channel. The fluid-weight control device, which is substantially independent of the composition and temperature of the fluid and of inertial effects induced in an attempt to thwart the fluid-weight control safeguard, also prevents introduction of fluid into the container as the container is non-upright. Modified embodiments utilize a pilot valve arrangement instead of the differential pressure feature. A method of practicing the invention is also provided.
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