Self-Triggering Rotor for Pneumatic Paddle Motor

Abstract

A rotor for pneumatic paddle motor is described, comprising a plurality of segments ( 50 ) separated by radial grooves ( 5 ) adapted to slidably house paddles ( 4 ). Each segment ( 50 ) includes a surface external edge ( 9, 9′ ) consisting of a convex portion ( 10 ) joined to at least one concave abutment ( 11, 11 ′).

1 . A pneumatic paddle motor comprising a rotor ( 1 ) comprising a plurality of segments ( 50 ) separated by radial grooves ( 5 ) suitable to slidably house paddles ( 4 ), said rotor ( 1 ) being mounted offset in a cylindrical housing ( 6 ) and with rotation axis shifted towards a first edge portion ( 66 ) of the housing ( 6 ) comprised between an inlet ( 7 ) and an outlet ( 8 ) of the compresses air in such a way that the paddles ( 4 ) are completely contained in said radial grooves ( 5 ) in correspondence with said first edge portion ( 66 ) and are movable inside said grooves ( 6 ) between said maximum containment position and a position of maximum protrusion substantially in correspondence with a second edge portion ( 67 ) opposite to said first edge portion ( 66 ), the paddles ( 4 ) being suitable to perform said movement of coming out and back only one time for every round of the rotor ( 1 ), wherein each segment ( 50 ) of said rotor provides a superficial external edge ( 9 ,  9 ′) consisting of a convex portion ( 10 ) joined to at least a concave abutment ( 11 ,  11 ′). 
     
     
         2 . The motor according to  claim 1 , wherein said concave abutment ( 11 ,  11 ′) provides a curved cavity. 
     
     
         3 . The motor according to  claim 1 , wherein said concave abutment ( 11 ,  11 ′) provides a cavity with a right angle corner. 
     
     
         4 . The motor according to  claim 1 , wherein the surface external edge ( 9 ) is constituted by a convex portion ( 10 ) joined to a following concave abutment ( 11 ). 
     
     
         5 . The motor according to  claim 1 , wherein the surface external edge ( 9 ′) is constituted by a couple of concave abutments ( 11 ′) joined between them by a convex portion ( 10 ).