Container having fluid-weight control device
First Claim
1. A device for introducing fluid into a container, comprising:
- (a) a body configured to mount to the container;
(b) a detector mechanism connected to said body, said detector mechanism having a displacer and being configured such that buoyancy forces of said displacer slightly exceed gravitational forces thereof as fluid contained in the container reaches a desired weight and is further configured to be substantially independent of the specific gravity and composition of the fluid contained in the container; and
(c) a shut off mechanism solely responsive to said detector mechanism configured to automatically prevent introduction of additional fluid into the container as said detector mechanism determines that said fluid contained in the container has reached said desired weight.
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Accused Products
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.
43 Citations
30 Claims
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1. A device for introducing fluid into a container, comprising:
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(a) a body configured to mount to the container; (b) a detector mechanism connected to said body, said detector mechanism having a displacer and being configured such that buoyancy forces of said displacer slightly exceed gravitational forces thereof as fluid contained in the container reaches a desired weight and is further configured to be substantially independent of the specific gravity and composition of the fluid contained in the container; and (c) a shut off mechanism solely responsive to said detector mechanism configured to automatically prevent introduction of additional fluid into the container as said detector mechanism determines that said fluid contained in the container has reached said desired weight. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus, comprising:
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(a) a container having a cavity; and (b) a fluid-weight control mechanism configured to introduce a weight of fluid into said cavity wherein said weight may be up to, but is automatically prevented from exceeding, a predetermined weight of the fluid, wherein said fluid weight control mechanism is substantially independent of the composition of fluid contained in said cavity, and wherein said fluid-weight control mechanism includes a detection mechanism with a displacer that is configured such that buoyancy forces of said displacer slightly exceed gravitational forces thereof as the fluid in the container reaches said predetermined weight of fluid. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A method of preventing overfilling of a container with fluid, said method comprising the steps of:
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(a) introducing the fluid into the container through a device installed through a wall of the container, wherein said device includes a displacer that is configured such that buoyancy forces of said displacer slightly exceed gravitational forces thereof as the fluid contained in the container reaches a predetermined weight of the fluid; (b) using said device to stop filling of the container when the container substantially contains said predetermined weight of the fluid substantially irrespective of the specific gravity of the fluid; and (c) further using said device to automatically prevent introduction of additional fluid into the container upon determining that the container substantially contains said predetermined weight of the fluid.
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Specification