Rotary piston engine

Claim 2

A rotary piston engine comprising a stator, two rotors of different diameters, each rotatably mounted in a separate chamber in the stator, gear means for rotating the rotors in opposite directions, and a drive shaft extending from the gear means through the center of the rotor of larger diameter without being connected thereto and into the rotor of smaller diameter having its axis out of alignment with the axis of the rotor of larger diameter, said chambers communicating with each other and varying in volume during rotation of the rotors, said chamber accommodating the rotor of smaller diameter serving as a compression chamber for the explosive mixture and carrying out the induction phase, said rotor of larger diameter carrying out the explosions, expansion and exhaust phase.

Claim 3

A rotary piston engine as claimed in claim 1, wherein the two chambers housing the rotors communicate with each other through an aperture provided in a partition dividing them and a recess is provided in the rotor of larger diameter to serve as an explosion chamber when it comes into alignment with said aperture.

Claim 4

A rotary piston engine as claimed in claim 2, wherein the recess serving as an explosion chamber is provided on the outer periphery of the rotor of larger diameter adjacent a substantially triangular skid pivotally mounted on the outer peRiphery of the rotor of larger diameter and in alignment with said periphery when the skid is in its retracted position, the skid being normally urged against the inner peripheral wall of the chamber housing the rotor of larger diameter serving as a drive rotor as different from the rotor of smaller diameter serving as a compressor rotor, and a slide is provided in the stator and is constantly urged against the outer periphery of the drive rotor to provide for variation of the volume of the drive rotor chamber, the sealing thereof and one explosion of the explosive mixture for each revolution of the drive rotor.

Claim 5

A rotary piston engine as claimed in Claim 3, wherein the arrangement is such that during rotation of the rotors in opposite directions the compressor rotor and the explosion chamber in the drive rotor symmetrically approach the communication aperture between the two chambers until they are in alignment therewith in the exact moment of the explosion and the explosive mixture compressed by the compressor rotor will remain within the space defined by said communication aperture extending through the thickness of the partition between the two chambers, until the explosion chamber comes up in alignment with said communication aperture and the drive rotor will not clear said communication aperture until the compressed explosive mixture is removed, said drive rotor automatically closing said communication aperture immediately after the explosion until the next phase.

Claim 6

A rotary piston as claimed in claim 1, wherein the drive shaft has mounted thereon at one of its ends a bevel gear accommodated in a housing formed integrally with the stator and the other end of the drive shaft is firmly secured to an eccentric cam on which the rotor of smaller diameter is freely rotatably mounted, the rotor of larger diameter being provided with a hollow shaft accommodating in its interior said drive shaft and said bevel gear meshes with miter gears in turn meshing with a bevel gear at the end of said hollow shaft to form a closed power transmission cycle and thus ensure rotation of the rotors in opposite directions.

Claim 7

A rotary piston engine as claimed in claim 1, wherein the arrangement of the rotors, gear means and drive shaft is such as to produce one explosion of the explosive mixture during each rotation of the rotors.

Claim 8

A rotary piston engine as claimed in claim 1, wherein the gear means comprises bevel gears interposed between the drive shaft and a hollow shaft extending from the rotor of larger diameter and by selecting an appropriate transmission ratio of the bevel gears it is possible to obtain more than one revolution of the rotor of smaller diameter during each revolution of the rotor of larger diameter and for each revolution of the rotor of smaller diameter an explosion chamber and an adjacent pivotally mounted substantially triangular skid are provided on the outer periphery of the rotor of larger diameter to carry out more than one explosion of the explosive mixture during each revolution of the rotor of larger diameter, said skid being in alignment with the outer periphery of the rotor of larger diameter in their retracted position and being normally urges against the inner peripheral wall of the chamber housing the rotor of larger diameter.

Claim 9

A rotary piston engine as claimed in claim 1, wherein the chamber accommodating the rotor of larger diameter is of circular form in cross section.

Claim 10

A rotary piston engine as claimed in claim 1, wherein the chamber accommodating the rotor of larger diameter has an elliptical form in cross section and the drive shaft extends therethrough at one of the focuses of the ellipse.