Patent ID: 6079377
Filing Date: 2000-06-27
Classification: F01B,F02B

Abstract:
A power machine comprising:a common cylinder having a bore formed therein;two pistons disposed in said bore in opposed facing relation with respect to each other and being constructed and arranged to synchronously reciprocate within said bore in opposite respective directions; anda transmission mechanism for converting linear reciprocating movement of said two pistons into a rotating movement, said transmission mechanism comprising a stationary disc and a rotating disc, said rotating and stationary discs being arranged in generally parallel relation to one another and being operatively coupled to each other and to said two pistons to convert reciprocating movement of said pistons into rotation of said rotating disc, wherein said common cylinder is mounted within centrally-located openings formed in said stationary and rotating discs, said openings being positioned and configured to permit cooling air to pass through said openings and over an outer surface of said common cylinder.