Pumps – Motor driven – Pump and motor interconnected by endless flexible...
Reexamination Certificate
2006-04-18
2006-04-18
Freay, Charles G. (Department: 3746)
Pumps
Motor driven
Pump and motor interconnected by endless flexible...
C417S423800
Reexamination Certificate
active
07029244
ABSTRACT:
A centrifugal blower is provided which incorporates a self-contained air cooling system. The blower includes a drive assembly connected to a drive motor and disposed within a housing having inlet and outlet apertures. A centrifugal compressor is connected to the drive assembly and disposed exteriorly to the housing adjacent to the outlet apertures. Rotation of a drive pulley, including a fan, by the drive motor causes air to enter the housing through the inlet apertures, flow over components of the drive assembly, and exit through the outlet apertures. A spindle assembly having a rigid bearing arrangement is also provided. One or more bearing elements are disposed at opposite ends of a spacer and between a shaft and housing of the spindle assembly. Such rigid pre-loaded bearing arrangement eliminates “unloading” concerns, and allows load sharing between bearing elements.
REFERENCES:
patent: 2279620 (1942-04-01), Hirschman
patent: 3392910 (1968-07-01), Tanzberger
patent: 3929285 (1975-12-01), Daugherty, Jr.
patent: 4869641 (1989-09-01), Hufgard
patent: 5161939 (1992-11-01), Stadler
Freay Charles G.
Kelly Lowry & Kelley LLP
Vortech Engineering, Inc.
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