Pumps – Three or more cylinders arranged in parallel – radial – or... – Radial cylinders
Reexamination Certificate
2005-12-09
2008-09-09
Kramer, Devon (Department: 4147)
Pumps
Three or more cylinders arranged in parallel, radial, or...
Radial cylinders
C092S086000, C303S116400, C277S514000
Reexamination Certificate
active
07422421
ABSTRACT:
A reservoir chamber33, which communicates with a vent passage34provided in an electric motor11, is formed between a motor casing20of the electric motor11and a body13in which a drain port59A, which communicates with the reservoir chamber33, is provided with its external open end oriented downwardly, and a capacity of the reservoir chamber33below the vent passage34is set to become larger than a sum of a cooling contraction amount of air in the electric motor11and the reservoir chamber33which contracts in response to cooling by water covering the pump apparatus which has been warmed up under an operating environment and a pressurizing compression amount of air in the electric motor11and the reservoir chamber33which is compressed by a water pressure applied from the drain, port59A when the pump apparatus is submerged.
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Bayou Amene S
Greenblum & Bernstein P.L.C.
Kramer Devon
Nissin Kogyo Co. Ltd.
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