Rotary engine and drive coupling

A rotary engine comprising:

• a housing defining a curved chamber;
• means supporting a plurality of pistons within said chamber such that the spacing between adjacent pistons is variable to form a variable combine volume therebetween;
• power coupling means including a first movable member coupled to at least one of said plurality of pistons, a second movable member coupled to at least one other piston in said plurality of pistons adjacent said one piston, said first and second members defining first and second curved slots, a pin guide defining at least one radially extending slot, a drive cam having a cam surface, and at least one pin extending coupling said first and second curved slots, said radially extending slot and contacting said cam surface;
• and
• first and second power shafts coupled to said drive cam and said pin guide.

A drive coupling for use in a rotary engine in which a pair of pistons rotate and confine a variable volume therebetween, said drive coupling comprising:

• a first piston rotor having a first rotating member defining a first plurality of curved slots and a first plurality of outwardly extending pistons having a cross-section corresponding to said predetermined cross section;
• a second piston rotor having a second rotating member defining a second plurality of curved slots and a second plurality of outwardly extending pistons having cross-section corresponding to said predetermined cross-section;
• a pin guide defining a plurality of radially extending slots;
• a first shaft coupled to said pin guide;
• a drive cam defining a cam surface;
• a second shaft coupled to said cam;
• and
• a plurality of pins each partially received within one of said curved slots in each of said first and second piston rotors and one of said slots in said pin guide and each contacting said cam surface.