Blade Arm

Abstract

The apparatus of the present invention comprises a user adjustable variable axial length and variable pitch ceiling fan blade arm. The blade arm includes a pair of extension elements. Each element is threadably engaged with each other. At the other end of the extension elements are custom flanges for the purpose of attaching a fan blade and connecting the blade arm to a ceiling fan motor. The user can adjust the axial length and radial pitch of the blade arm by screwing in or out a threaded connection between the extension elements, and once the desired length and pitch is selected, the connection is secured by a connector, such as a hand adjustable threaded lock.

1 . An adjustable blade arm for connecting a fan blade to a motor, said blade arm comprising:
 a) first and second extension elements extending generally along an axial direction, said pair of extension elements being adjustably connected to one another via a threaded engagement, at least one of said extension elements capable of having its length axially adjusted;   b) a connector adjustable in an axial direction relative to said first and second extension elements, said connector comprising an interior threaded portion and an external gripping portion, said threaded portion for mating between said extension elements in an axial direction, said connector capable of being located in a plurality of axial locations, including in axial location flush to said first extension element and a second location flush to said second extension element, and said gripping portion for facilitating a hand tightened fit with said extension elements in either axial location, said gripping portion having a axial length greater than said interior threaded portion, whereby the connector secures a user selected length of said blade arm in said axial direction.   
     
     
         2 . The adjustable blade arm of  claim 1 , wherein said connector further secures a user selected radial orientation of said fan blade relative to said axial direction. 
     
     
         3 . A blade arm for attaching a fan blade to a motor comprising:
 a) first and second extension element extending generally along an axial direction, said extension elements being adjustably connected to one another via an adjustable axial threaded engagement, at least one of said extension elements capable of having its length axially adjusted;   b) a flange at a distal end of said first extension element for mating said blade arm with a fan blade;   c) a mounting bracket at a proximal end of said second extension element for attaching said blade arm to a motor; and   d) a connector for said extension elements, said connector adjustable in an axial direction relative to said first and second extension elements, said connector extending radially through at least one of said extension elements for providing a user adjustable friction fit with said axial threaded engagement, whereby the connector secures a user pitch of said fan blade, said connector capable of being located in a plurality of axial locations, including in axial location flush to said first extension element and a second location flush to said second extension element.   
     
     
         4 . The blade arm of  claim 3 , wherein the connector enables a user adjustable friction fit with said axial threaded engagement for securing a user selected axial length of said blade arm. 
     
     
         5 . An adjustable blade arm for connecting a fan blade to a motor, said blade arm comprising:
 a) first and second extension elements extending generally along an axial direction, said pair of extension elements being adjustably connected to one another via a threaded engagement, at least one of said extension elements capable of having its length axially adjusted;   b) a connector for said extension elements, said connector adjustable in an axial direction relative to said first and second extension elements, said connector having an interior threaded portion and exterior surfaces for receiving both hand grip and tool for adjustment, said exterior surfaces having an axial length greater than said interior threaded portion, at least one of said extension elements extending radially through said connector for providing a user tool adjustable friction fit with said threaded engagement, whereby the connector secures a user selected length of said blade arm in said axial direction and a user selected radial orientation of said fan blade relative to said axial direction.   
     
     
         6 . An adjustable blade arm for connecting a fan blade to a motor, said blade arm comprising:
 a) first and second extension elements extending generally along an axial direction, said pair of extension elements being adjustably connected to one another via a threaded engagement, at least one of said extension elements capable of having its length axially adjusted;   b) a connector adjustable in an axial direction relative to said first and second extension elements, said connector comprising an interior threaded portion and an external gripping portion, said threaded portion for mating between said extension elements in an axial direction, said exterior surfaces having an axial length greater than said interior threaded portion, at least one of said extension elements extending radially through said connector for providing a hand tightened fit with said threaded engagement, whereby the connector secures a user selected length of said blade arm in said axial direction and a user selected radial orientation of said fan blade relative to said axial direction.   
     
     
         7 . The adjustable blade arm of  claim 6 , wherein said connector further includes an exterior surface for receiving a tool for adjusting the fit of the threaded engagement. 
     
     
         8 . A blade arm for attaching a fan blade to a motor comprising:
 a) first and second extension element extending generally along an axial direction, said extension elements being adjustably connected to one another via an adjustable axial threaded engagement, at least one of said extension elements capable of having its length axially adjusted;   b) a flange at a distal end of said first extension element for mating said blade arm with a fan blade;   c) a mounting bracket at a proximal end of said second extension element for attaching said blade arm to a motor; and   d) a connector for said extension elements, said connector adjustable in an axial direction relative to said first and second extension elements, said connector having an exterior surface for receiving a tool for adjustment, at least one of said extension elements extending radially through said connector for providing a user tool adjustable friction fit with said threaded engagement, whereby the connector secures a user selected length of said blade arm in said axial direction and a user selected radial orientation of said fan blade relative to said axial direction.   
     
     
         9 . The blade arm of  claim 8 , wherein the connector wherein said connector further includes an exterior gripping surface for providing a user hand adjustable friction fit with said threaded engagement.