James M Grupa, 7442445 Iverson Dr, Wilson, MN 55987
James Grupa Phones & Addresses
42445 Iverson Dr, Winona, MN 55987 507-6436300
853 4Th St, Winona, MN 55987 507-4526739
Dodge, WI
Mentions for James M Grupa
Publications & IP owners
Us Patents
Airflow Regulator
US Patent:
5348449, Sep 20, 1994
Filed:
Nov 19, 1992
Appl. No.:
7/978716
Inventors:
Robert A. Wilke - Winona MN
James M. Grupa - Dodge WI
James M. Grupa - Dodge WI
Assignee:
Lake Center Industries, Inc. - Winona MN
International Classification:
F04F 548
US Classification:
417 54
Abstract:
A passive aspirator based on the Venturi effect has a pivotable flap in the inlet portion of a first air passage. The flap reduces the air flow through the passage when high pressure is present. A spring biases the flap toward an open position. Increasing air flow overcomes the spring force and tends to close the flap. This variable-volume flow allows use of a large enough passage to aspirate sufficient air at low flow rates but does not produce excess waste air at high flow rates.
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