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US 12,600,448 B1Granted
Enhanced performance parallel loop blade propellers
OwnerCharles S Powersinventor
Life of this patent
Estimating the term…
Abstract
Enhanced performance parallel loop blade propellers may include a propeller hub having a fore hub end and an aft hub end. A plurality of looped blade pairs may extend from the propeller hub in spaced-apart relationship to each other. Each of the looped blade pairs may include a fore blade which extends from the propeller hub proximate the fore hub end. An aft blade may extend from the propeller hub proximate the aft hub end. The aft blade may be disposed generally within a common blade pitch plane as the fore blade in an adjacent one of the looped blade pairs. Accordingly, the fore blade and the aft blade of each corresponding looped blade pair may be disposed in generally parallel relationship to each other. A blade bridge may extend from the fore blade to the aft blade in each looped blade pair.
Claims28
A marine propeller, comprising:
- a propeller hub having a fore hub end, an aft hub end and a longitudinal hub axis extending through the fore hub end and the aft hub end;
- and
- a plurality of looped blade pairs extending from the propeller hub in spaced-apart relationship to each other, each of the plurality of looped blade pairs comprising:
- a fore blade extending from the propeller hub proximate the fore hub end, the fore blade having a fore blade root with a fore blade root midpoint on the propeller hub;
- an aft blade extending from the propeller hub proximate the aft hub end, the aft blade having an aft blade root with an aft blade root midpoint on the propeller hub, the aft blade disposed within a common blade pitch plane as the fore blade in an adjacent one of the plurality of looped blade pairs, whereby the fore blade and the aft blade of each corresponding one of the plurality of looped blade pairs are disposed in parallel relationship to each other;
- and
- a blade bridge extending from the fore blade to the aft blade;
- and
- wherein the aft blade root midpoint of the aft blade root is disposed in spaced-apart, inline relationship with respect to the fore blade root midpoint of the fore blade root along a blade root inline axis parallel to the longitudinal hub axis of the propeller hub.
6 more elements
A marine propeller, comprising:
- a propeller hub having a fore hub end and an aft hub end;
- a plurality of looped blade pairs extending from the propeller hub in spaced-apart relationship to each other, each of the plurality of looped blade pairs comprising:
- a fore blade extending from the propeller hub proximate the fore hub end;
- an aft blade extending from the propeller hub proximate the aft hub end, the aft blade disposed within a common blade pitch plane as the fore blade in an adjacent one of the plurality of looped blade pairs, whereby the fore blade and the aft blade of each corresponding one of the plurality of looped blade pairs are disposed in parallel relationship to each other;
- and
- a blade bridge extending from the fore blade to the aft blade;
- and
- wherein a fore blade root of the fore blade and an aft blade root of the aft blade are separated from each other by a blade root spacing distance less than or equal to a blade root chord width of the fore blade root.
5 more elements
A marine propeller, comprising:
- a fore propeller and an aft propeller configured to counter rotate with respect to each other, each of the fore propeller and the aft propeller comprising:
- a propeller hub having a fore hub end and an aft hub end and a longitudinal hub axis extending through the fore hub end and the aft hub end;
- a plurality of looped blade pairs extending from the propeller hub in spaced-apart relationship to each other, each of the plurality of looped blade pairs comprising:
- a fore blade extending from the propeller hub proximate the fore hub end, the fore blade having a fore blade root with a fore blade root midpoint on the propeller hub;
- an aft blade extending from the propeller hub proximate the aft hub end, the aft blade having an aft blade root with an aft blade root midpoint on the propeller hub and disposed within a common blade pitch plane as the fore blade in an adjacent one of the plurality of looped blade pairs, whereby the fore blade and the aft blade of each corresponding one of the plurality of looped blade pairs are disposed in parallel relationship to each other;
- and
- a blade bridge extending from the fore blade to the aft blade;
- and
- wherein a fore blade root of the fore blade and an aft blade root of the aft blade are separated from each other by a blade root spacing distance less than or equal to a blade root chord width of the fore blade root;
- a blade bridge extending from the fore blade to the aft blade;
- and
- wherein the aft blade root midpoint of the aft blade root is disposed in spaced-apart, inline relationship with respect to the fore blade root midpoint of the fore blade root along a blade root inline axis parallel to the longitudinal hub axis of the propeller hub;
- wherein the fore blade and the aft blade of each of the plurality of looped blade pairs has a longitudinal blade root centerline oriented along or parallel to a longitudinal axis of each of the fore blade root and the aft blade root;
- and
- wherein the fore blade and the aft blade of each of the plurality of looped blade pairs has a transverse blade root centerline oriented perpendicular to the longitudinal axis of the each of the fore blade root and the rear blade root, the longitudinal blade root centerline of the aft blade in the each of the plurality of looped blade pairs intersecting the transverse blade root centerline of the fore blade in each adjacent one of the plurality of looped blade pairs.
12 more elements
Dependencies are inferred from the claim text.