Geometrical instruments – Distance measuring – Sounding type
Patent
1995-04-28
1996-08-13
Will, Thomas B.
Geometrical instruments
Distance measuring
Sounding type
33722, G01F 2304
Patent
active
055444199
ABSTRACT:
An improved dipstick assembly is provided for measuring liquid level in a chamber containing liquid and gas in which the liquid may be agitated, and in which the gas may have a pressure different from atmospheric. An example is the oil reservoir or crankcase of a reciprocating apparatus while the apparatus is running. A tube is provided for attachment to an upper portion of the chamber, the tube extending downward into the liquid. A liquid level indicating device is inserted in the tube. A valve is provided at or near the bottom of the tube to close it off when the liquid level measuring device is removed, but which is opened when the device is inserted, so that a reading can be made. The valve prevents loss of liquid through the tube when the measuring device is removed, and prevents gas in the chamber from communicating with the atmosphere. When the measuring device is inserted, a seal at or near its upper end prevents such loss or communication. Various economical and reliable designs are provided for the valve.
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Westinghouse Air Brake Company
Will Thomas B.
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