Frank P Vanaman DeceasedLutherville Timonium, MD
Frank Vanaman Phones & Addresses
Lutherville Timonium, MD
Washington, DC
8412 Charles Valley Ct, Towson, MD 21204 (410) 494-4964
Cobb Island, MD
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Publications & IP owners
Us Patents
Vortex Chamber Mud Pulser
US Patent:
5455804, Oct 3, 1995
Filed:
Jun 7, 1994
Appl. No.:
8/255866
Inventors:
Allen B. Holmes - Rockville MD
Frank B. Vanaman - Baltimore MD
Tadeusz M. Drzewiecki - Rockville MD
Frank B. Vanaman - Baltimore MD
Tadeusz M. Drzewiecki - Rockville MD
Assignee:
Defense Research Technologies, Inc. - Rockville MD
International Classification:
H04H 900
US Classification:
367 83
Abstract:
A vortex chamber fluid pulser selectively produces pressure pulses in fluid flowing therethrough by the alternating insertion and retraction of a flow-disrupting tab into and out of an annular vortex chamber having an inlet and a pair of opposed axial outlets. Insertion of the tab disrupts the normally radial flow of fluid through the chamber and outlets causing the flow to become vortical; retraction of the tab causes a second pressure pulse as the flow returns to radial, sending a sequence of pressure pulses capable of carrying encoded signals to a transducer remotely located in the fluid.
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