Measuring and testing – Liquid level or depth gauge – Hydrostatic pressure type
Reexamination Certificate
2007-06-12
2007-06-12
Williams, Hezron (Department: 2856)
Measuring and testing
Liquid level or depth gauge
Hydrostatic pressure type
C141S095000
Reexamination Certificate
active
11206560
ABSTRACT:
A sensor involving a housing having a lower orifice to which a primary hose is connected. A secondary hose inside the primary hose is slightly shorter than the primary hose, with these hoses being placed inside a bin for determining fill level. One of two upper orifices in the housing is connected to a supply of air under pressure, with this air normally caused to flow outwardly from one of the hoses. Upon the degree of the fill of the bin being such that the material approaches the remote end of one of the hoses, the air normally flowing from the one hose is caused to be deflected into the remote end of the other of the hoses, causing a pressure increase. This pressure increase is directed through the other upper orifice, for being sensed at remotely located pressure sensing equipment.
REFERENCES:
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patent: 3459035 (1969-08-01), Russon
patent: 3734313 (1973-05-01), Gauthier et al.
patent: 3994169 (1976-11-01), Wolford
patent: 4058230 (1977-11-01), Bellenberg et al.
patent: 4241606 (1980-12-01), Vandenhoeck
patent: 4807672 (1989-02-01), Sherk et al.
Renfro, Esquire Julian C.
West Paul M.
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