US2014169970A1PendingUtilityA1

Attached duct propeller system

32
Individually held — no corporate assignee on recordPriority: Dec 18, 2012Filed: Dec 13, 2013Published: Jun 19, 2014
Est. expiryDec 18, 2032(~6.4 yrs left)· nominal 20-yr term from priority
Inventors:Michael Anthony Celentano
B63H 1/16Y10T29/49321Y02T70/50B63H 23/34B64C 11/001
32
PatentIndex Score
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Cited by
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Claims

Abstract

An attached duct propeller system may include at least one propeller blade having at least one blade tip. A duct having an inner wall may surround the at least one propeller blade. The at least one propeller blade may attach to the inner wall of the duct. In certain embodiments, the attached duct propeller system may include a propeller shaft attached to a bore of the at least one propeller blade. In certain embodiments, the at least one blade tip may be trimmed to allow alignment within the duct and allow for the attachment of the at least one blade to the inner wall of the duct. The attached duct propeller system may be used for vehicles that use at least one propeller for propulsion.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . An attached duct propeller system comprising:
 at least one propeller blade having at least one blade tip; and   a duct having an inner wall, wherein the duct surrounds the at least one propeller blade, wherein the at least one propeller blade attaches to the inner wall of the duct.   
     
     
         2 . The attached duct propeller system of  claim 1 , wherein the at least one propeller blade is welded to the inner wall of the duct. 
     
     
         3 . The attached duct propeller system of  claim 1 , further comprising a propeller shaft, wherein a center bore of the at least one propeller blade attaches to the propeller shaft. 
     
     
         4 . The attached duct propeller system of  claim 3 , further comprising an engine/transmission attached to the propeller shaft. 
     
     
         5 . An attached duct propeller system comprising:
 at least one propeller blade having at least one blade tip, wherein the at least one blade tip is trimmed; and   a duct having an inner wall, wherein the duct surrounds the at least one propeller blade, wherein the at least one propeller blade attaches to the inner wall of the duct.   
     
     
         6 . The attached duct propeller system of  claim 5 , wherein the at least one blade tip is trimmed to a flat surface parallel to a centerline of thrust. 
     
     
         7 . The attached duct propeller system of  claim 5 , wherein the at least one propeller blade is welded to the inner wall of the duct. 
     
     
         8 . The attached duct propeller system of  claim 5 , further comprising a propeller shaft, wherein a center bore of the at least one propeller blade attaches to the propeller shaft. 
     
     
         9 . The attached duct propeller system of  claim 8 , further comprising an engine/transmission attached to the propeller shaft. 
     
     
         10 . A method of improving efficiency in a propelled device, comprising:
 providing a propeller having at least one propeller blade;   providing a substantially cylindrical duct having a duct inside diameter;   removing a portion of at least one tip of the at least one propeller blade so that the propeller fits snugly inside the duct;   attaching the at least one blade to the duct; and   balancing the propeller.   
     
     
         11 . The method of  claim 10 , further comprising the step of rotating the propeller to provide an impulse reaction to propel a vehicle that uses at least one propeller for propulsion. 
     
     
         12 . The method of  claim 10  further comprising the step of attaching a shaft of the at least one propeller blade to an engine/transmission.

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