Pneumatic rotary motor without connecting rods

Abstract

A pneumatic rotary motor includes cylinders around a central channel, an inlet tube, an exhaust tube, ducts being in communication with the cylinders, a rotor in the channel and including an eccentric rotation member, a rotating shaft, an intake valve adapted to communicate the inlet tube with the duct or not, and an exhaust valve adapted to communicate the exhaust tube with the duct or not, and pistons slidably mounted in the cylinders and being in contact with the rotation member. Sequentially entering compressed air into each cylinder through the inlet tube, the intake valve, and the duct will push the piston to rotate the rotation member to output power from the rotating shaft, and release the air from one of the cylinders through the duct, the exhaust valve, and the exhaust tube at the end of each revolution of the rotor.

1 . A pneumatic rotary motor comprising:
 a housing including a central, cylindrical channel, a plurality of cylinders equally spaced around a periphery of the channel and in communication therewith, an inlet tube, an exhaust tube, and a plurality of ducts each being in communication with the cylinder;   a rotor fitted in the channel and including an eccentric rotation member on a top, a lower rotating shaft operatively connected to the rotation member, an intermediate intake valve adapted to communicate the inlet tube with the duct or not, and an exhaust valve adapted to communicate the exhaust tube with the duct or not;   a plurality of pistons each slidably mounted in the cylinder and being in contact with the rotation member; and   a plurality of cylinder head covers each releasably secured to an outer portion of the cylinder;   whereby sequentially entering compressed air into each of the cylinders through the inlet tube, the intake valve, and the duct will push the piston to rotate the rotation member to output power from the rotating shaft, and release the air from one of the cylinders through the duct, the exhaust valve, and the exhaust tube at the end of each revolution of the rotor.   
   
   
       2 . The pneumatic rotary motor of  claim 1 , wherein the number of each of the cylinders, the pistons, and the ducts is three. 
   
   
       3 . The pneumatic rotary motor of  claim 2 , wherein a phase difference of  120  degrees exists between the compressed air entering one cylinder and the compressed air entering the next cylinder. 
   
   
       4 . The pneumatic rotary motor of  claim 1 , wherein the number of each of the cylinders, the pistons, and the ducts is five. 
   
   
       5 . The pneumatic rotary motor of  claim 4 , wherein a phase difference of  72  degrees exists between the compressed air entering one cylinder and the compressed air entering the next cylinder.