Friction-free Rotary Piston Scissor Action Motor / Hot Air Energy Generator

(2) Butterfly Gear driven mechanism, as defined in claim 1, comprised of a paired butterfly shape gear, including a pair of driving gears, which are mounted on the axle of each piston rotor, and two transmission gears, which are perpendicularly mounted on another axle;

• transmits torque from one piston, through its driving gear to transmission gear, to another piston.

(3) Butterfly Gears, as defined in claim 2, have the unique “Butterfly” shapes' which allow the pair of gears to simultaneously change the gear ratio from low to high and vice versa while the Butterfly Gear is rotating

(4) While transmission gear, as defined in claim 2, is always rotating at a constant angle speed;

• two driving gears, as defined in claim 2, will shift from high to low angle speed alternately, resulting in the scissor action of the piston.

(5) Friction-free rotary pistons, as defined in claim 1, consists of a bearing ring between the slots of two rotor surfaces and a bearing on both axles to support the piston's weight;

• thus there is no physical contact between the housing and each of the piston members, having no vane to seal the pistons.

(6) The bouncing spring momentum exchange mechanism, as defined in claim 1, comprises of a set of springs placed on one side of each wing of rotary members designed to reduce vibration' and also designed to efficiently pass momentum from the fast moving rotary member to the slow moving rotary member during the scissor action. .

(7) Friction-free rotary pistons , as defined in claim 5, and bouncing spring momentum exchange mechanism, as defined in claim 6, enable pistons to rotate at high speed like turbine blade leaving less time for air leakage, thus eliminating the need to use vanes for sealing;

• yet still maintain high efficiency.

(8) The springs, as defined in claim 6, can be coiled, bended arc, or different shapes;

• and embedded or mounted with different methods.

(9) The positioning of the intake and exhaust ports on the housing, as defined in claim 1, are set apart at about 20 degree angle, to control the timing of the air input and air exhaust, which is on the outside of the slow moving piston member and closes the intake when the fast moving member rotates to about half-way;

• thus letting the air to keep expanding in the chamber which pushes on the members resulting in the maximum transfer of momentum.

(10) All the parts, as, defined in claim 1, including the air intake, exhaust ports, rotary piston members, pressure and exhaust chambers, and Butterfly Gears consists of symmetrically distributed and balanced components, which enable the high speed rotation with minimum vibration.

(11) Friction-free rotary piston scissor-action motor, as defined in claim 1, can be rotated in reverse to operate as a compressor.

(12) Hot air energy generator, as defined in claim 1, comprised of two friction-free rotary piston scissor-action motors;

• where one works as a compressor, as defined in claim 1, and the other as an air motor;
• both of which are connected with a heat exchange container to generate motion energy by compressing cool air into a heat exchange container which can be heated up by concentrated sunlight or any other heat source, and expand into the air motor to produce work.

(13) The compressor, as defined in claim 11, is driven by the air motor via a belt through pulleys linked on transmission gear of each motor, as defined in claim 2;

• with the ratio of the dimension of two pulleys decided by the minimum portion of driving force needed from air motor back to compressor.

(14) The driving transmission methods from air motor to compressor, as defined in claim 13, can use gears or any driving mechanisms.