Thrust/airflow control device
OwnerOtis Laytoninventor
Life of this patent
Estimating the term…
Abstract
A device used in a ducted fan (shrouded propeller or similar axial flow, air moving producer) that's positioned on or about the ducted fan so as to disrupt or distort the subsequent laminar airflow induced by said air moving producer. The said device would, when actuated rapidly and precisely increase or decrease proportionately the resultant net thrust/airflow without varying the fan/propellers RPM.
Claims11
A retractable structure positioned on or about the inlet lip, also known as the bellmouth of a duct or turbo fan (or any shrouded or ducted air moving device), so as when in the open position disturbs the laminar air flow entering the said duct, therefore reducing net thrust production.
A moveable surface positioned on the interior wall of a ducted fan's duct at or near the position of the fan's circumferential rotary plane, that when in an open position creates a laminar air flow distortion, resulting in an immediate and precisely controllable net loss of thrust.
A rotary fan system that includes a number of multiple blades of 4 or greater.
Dependencies are inferred from the claim text.