Measuring and testing – Instrument casing
Reexamination Certificate
2006-07-04
2006-07-04
Williams, Hezron (Department: 2856)
Measuring and testing
Instrument casing
C073S866500
Reexamination Certificate
active
07069781
ABSTRACT:
This invention involves a new housing for a liquid level detection device. More particularly, the new stillwell apparatus comprises,at least one tubular section, a means for extending the length of the stillwell, a conduit for delivering a cleansing solution to the bottom of the tubular sections, a gas inlet tube for determination of the presence of hazardous gases, and a means for pressure equalization. In addition this invention reveals novel installation, removal and cleansing methods making it possible to install, remove, and cleanse the stillwell from an exterior of a vessel, thereby eliminating the need for highly trained personnel to enter the vessel in order to install, maintain, cleanse, or remove the stillwell.
REFERENCES:
patent: 1675210 (1928-06-01), Campbell
patent: 3825040 (1974-07-01), Haisch
patent: 4361038 (1982-11-01), Schuler
patent: 4671314 (1987-06-01), Heil
patent: 4815323 (1989-03-01), Ellinger et al.
patent: 5027655 (1991-07-01), Sweet
patent: 5095748 (1992-03-01), Gregory et al.
patent: 5172594 (1992-12-01), Dyke
patent: 5253522 (1993-10-01), Nyce
patent: 5309763 (1994-05-01), Sinclair
patent: 5315563 (1994-05-01), Lichtenfels et al.
patent: 5456108 (1995-10-01), Birkett
patent: 5996407 (1999-12-01), Hewitt
patent: 6588272 (2003-07-01), Mulrooney
patent: 6598473 (2003-07-01), Atkinson
patent: 6615656 (2003-09-01), Breed
patent: 6659431 (2003-12-01), Fang et al.
Frank Rodney
Whyte Hirschboeck Dudek SC
Williams Hezron
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