Pumps – Motor driven – Including means utilizing pump fluid for augmenting cooling,...
Reexamination Certificate
2009-03-13
2011-12-20
Freay, Charles (Department: 3746)
Pumps
Motor driven
Including means utilizing pump fluid for augmenting cooling,...
C417S423300, C417S423900, C417S423120, C417S424100
Reexamination Certificate
active
08079829
ABSTRACT:
An in-line motor and pump assembly is supported at the bottom of a fuel storage tank by a pipe and an internal concentric conduit for housing electrical conductors extending therewithin to the motor. An impeller, coaxial with the rotor of the motor, draws the fuel into an annular passageway surrounding the stator of the motor. Further passageways convey the fuel to an annular passageway defined between the pipe and the conduit for discharge external of the storage tank. A low pressure environment attendant the inflow of the fuel is used to channel fuel for lubrication and cooling purposes to a lower journal bearing and thrust bearing supporting a common shaft for the impeller and the motor. A high pressure environment attendant outflow of fuel is used to channel fuel for lubrication and cooling purposes to a journal bearing supporting the upper end of the shaft.
REFERENCES:
patent: 2689529 (1954-09-01), Wightman
patent: 3694110 (1972-09-01), Guinard
patent: 4213745 (1980-07-01), Roberts
patent: 5127792 (1992-07-01), Katsuta et al.
patent: 5356272 (1994-10-01), Nagata et al.
patent: 7513755 (2009-04-01), Geisinger et al.
patent: 2004/0052645 (2004-03-01), Christensen
Addink Jason L
Geisinger Penrod C.
Johnson Mark C
Klopfenstein Scott D
Young Gregory E
Freay Charles
The vol Hellens Law Firm, Ltd.
Vaporless Manufacturing Inc.
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