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US 4,377,809 AGranted
Liquid level system
AssigneeITT Corporation
InventorVictor N. Lawford
Life of this patent
Estimating the term…
Abstract
A liquid level system employs a bellows which is in flow communication with a differential pressure unit by a column of reference liquid. A float in the bellows carries a switch which energizes an alarm when liquid in the column is lost.
Claims1
A fluid link for a liquid level system comprising:
- a housing;
- movable pressure sensitive barrier means dividing said housing into separate first and second chambers;
- said housing having an inlet for admitting fluid under pressure into said first chamber;
- differential pressure sensing means;
- a conduit providing flow communication between said second chamber and said differential pressure sensing means;
- an incompressible liquid filling said second chamber and said conduit;
- a float in said second chamber, said float carrying switch actuating means;
- switch means adapted to be connected to indicating means, said switch means being actuated in response to the position of said switch actuating means on said float;
- and sealing means on said float for closing off said conduit when said liquid is lost therefrom.
6 more elements
Dependencies are inferred from the claim text.