Propeller
AssigneeSharrow Engineering LLC
InventorGregory Charles Sharrow
Life of this patent
Estimating the term…
Abstract
A propeller having a plurality of blades extending radially outward from a hub, the blades forming a loop. Each loop having an intake portion, an exhaust portion and a tip portion extending radially outward from the hub and a gap between the intake root and the exhaust root. The tip portion of each of the blades is 30%-75% of the blade, the tip portion beginning at a first deviation from zero of the roll value and extending to 90 degrees, wherein roll value is zero in a plane parallel to the hub axis, and wherein the blades have a vertical angle between −45 degrees and 45 degrees throughout.
Claims12
A method of manufacturing a propeller having a plurality of blades, each of the plurality of blades having an intake portion, an exhaust portion, and a tip portion extending from the intake portion to the exhaust portion, the method comprising:
- defining a plurality of parameter sections by selecting some of the parameters including skew angle, roll angle, rake, radius, pitch angle, and vertical angle values;
- defining the plurality of parameter sections so a root of the exhaust portion is forward of a root of the intake portion when extending outward from a hub, and skew is continually decreasing;
- extrapolating between the plurality of parameter sections to form smooth lines to form a blade of the plurality of blades configured to form a loop when attached to the hub;
- and
- attaching the plurality of blades to the hub to form the propeller.
A propeller comprising:
- a plurality of blades, each of the plurality of blades having an intake portion, an exhaust portion, and a tip portion extending from the intake portion to the exhaust portion;
- a hub;
- the plurality of blades extending outward from the hub and disposed around the hub;
- each blade forming a loop;
- each blade comprising a plurality of parameter sections having selected some of the parameters including skew angle, roll angle, rake, radius, pitch angle, and vertical angle values;
- a parameter section of the plurality of parameter sections at a transition from the intake portion to the tip portion defined by parameters to cause the amount of non-axial lift in the tip portion to be greater than the axial lift in the tip portion;
- a parameter section of the plurality of parameter sections or an area between consecutive parameter sections of the plurality of parameter sections in the tip portion having a roll value of 90 degrees;
- and
- a root of the exhaust portion is forward of a root of the intake portion when extending outward from the hub, and skew is continually decreasing.
Dependencies are inferred from the claim text.