The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 25, 1976
Filed:
Mar. 12, 1975
Francis M Manion, Rockville, MD (US);
Tadeusz M Drzewiecki, Silver Spring, MD (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
Described herein is a flueric laminar bi-stable amplifier. The device comses essentially a flueric amplifier having a supply nozzle, a pair of outlet nozzles, a pair of control nozzles, vent means located along the axial path of fluid flow and means for providing a supply of pressure to the vent means so as to maintain the vent pressure above ambient pressure. Means are also provided for grounding the control ports and for providing back pressure to the control ports. Essentially, the device is a flueric laminar flip-flop that does not use the Coanda effect, but rather it relies upon the instability of jet position due to vent pressurization. If vent flow is allowed to enter the control region in excess of that demanded by entrainment and the control port is vented to ambient, then any small perturbation will cause more flow to enter one side and less on the other, thereby increasing the pressure differential and causing the jet to deflect more until it reaches a stable position on one side or the other.