Rotary piston engine

Claim 1

A rotary combustion engine comprising: a combustion chamber having a first lobe, and a second lobe, and a throat interconnecting said first and second lobes of said combustion chamber; a flap piston positioned in said first lobe of said combustion chamber, said flap piston having an irregularly shaped cam configurated lower surface having a convexly domed portion; the tip of said flap piston being hingedly mounted to move into said second lobe, whereby when a combustible mixture is exploded in said first lobe of said combustion chamber, the expanding gases resulting from said explosion, drive said flap piston from within the first lobe into a portion of the second lobe; a single uni-planar rotary piston positioned in said second lobe of said combustion chamber, said rotary piston having its periphery positioned in a cam/cam follower contact with said convexly domed pOrtion of said irregularly cam-shaped lower surface of said flap piston, whereby when said flap piston is driven by said expanding volume of gases resulting from said explosion occurring in said first lobe of said combustion chamber, said convexly domed portion of said irregularly shaped cam configurated lower surface of said flap piston, cams the rotary piston into rotary motion, and the movement of said flap piston from within said first lobe into said second lobe, opens said throat so that the expanding gases resulting from the explosion occurring in said first lobe of said combustion chamber, pass through the now-open throat to directly drive said rotary piston in a rotary power producing manner; means for admitting a combustible mixture into said first lobe, said flap piston having a uniform upper surface, said uniform upper surface facing said means for admitting a combustible mixture, said uniform upper surface providing a means to compress a combustible mixture after its entry to the first lobe, whereby as the leading surface of said rotary piston contacts said irregularly shaped cam configurated lower surface of said flap piston, the flap piston is cammed completely into said first lobe, whereby compression of the combustible mixture occurs prior to its combustion; an exhaust port positioned in said second lobe, whereby rotation of said rotary piston causes said rotary piston to cooperate with said flap piston to form a means to force exhaust gases in said second lobe out through said exhaust port.