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US 6,408,692 B1Granted
Liquid level sensor
AssigneeIsspro, Inc.
InventorGary W. Glahn
Life of this patent
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Abstract
A liquid level sensor is provided that comprises an integral housing including therein a pickup tube, a return tube and a float cavity with a float positioned therein. Sensors are positioned within the float cavity for sensing the position of the float so as to determine the level of liquid within a tank or the like.
Claims19
A combined liquid level sensor and liquid pickup and return, comprising:
- an elongate housing that defines therein a pickup cavity, a return cavity and a substantially enclosed float cavity, said housing having a longitudinal axis, wherein said pickup cavity, said return cavity and said float cavity are sealed with respect to one another along said longitudinal axis;
- and
- a float positioned within said substantially enclosed float cavity and adapted for movement therealong,
- wherein said pickup cavity and said return cavity are substantially parallel to one another and substantially coextensive with one another,
- wherein said float cavity is defined between said pickup cavity and said return cavity,
- wherein said float cavity is substantially parallel to said pickup cavity and said return cavity, and
- wherein said float cavity is substantially coextensive with said pickup cavity and said return cavity.
4 more elements
A combined liquid level sensor and liquid pickup and return comprising:
- a housing that defines therein a pickup tube, a return tube and a substantially enclosed central cavity as an integral unit, there being substantially no fluid communication between either said pickup tube or said return tube with respect to the central cavity, said pickup tube, said return tube and said central cavity being substantially coextensive with one another;
- and
- a circuit board positioned within said central cavity and including thereon a plurality of position sensors.
A combined liquid level sensor and liquid pickup and return comprising:
- an elongate integral housing that defines therein a pickup cavity, a return cavity and a substantially enclosed liquid level cavity, said pickup cavity, said return cavity and said liquid level cavity being substantially coextensive with one another, fluid communication being substantially absent between said pickup cavity or said return cavity and said liquid level cavity along the extent thereof;
- a sensor positioned within said liquid level cavity;
- and
- a liquid level sender positioned within said liquid level cavity and adapted for movement within the liquid level cavity for indicating the liquid level to the sensor.
1 more element
Dependencies are inferred from the claim text.