Fluid handling – Processes – Cleaning – repairing – or assembling
Reexamination Certificate
2008-06-04
2011-12-13
Lee, Kevin (Department: 3753)
Fluid handling
Processes
Cleaning, repairing, or assembling
C137S242000, C137S244000, C251S333000
Reexamination Certificate
active
08074671
ABSTRACT:
A self-cleaning valve assembly is provided, such as for use in a vacuum cleaner such as a particularly advantageous vacuum cleaner system that has at least two filters and self-cleans its filters via back-flushing, without needing to stop normal operation to self-clean. Also, a vacuum cleaner is provided that uses permanent, self-cleaning filters, and does not need disposable filters or filter bags, and advantageously can use inexpensive plastic bags. In another vacuum cleaner system, waste is collected in an ordinary plastic bag without any special preparation or modification of the bag being needed. Further, an inventive self-cleaning X-valve assembly cleans itself and is useable in the vacuum cleaner system.
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Castronovo Charles A.
Peroni Drew B.
Applied Magnetics Lab., Inc.
Castronovo Charles A.
Lee Kevin
Whitham Curtis Christofferson & Cook PC
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