Patent ID: 7975660

Claim:
A two-stroke internal combustion engine comprising: a cylinder; a piston in said cylinder; a combustion chamber defined by said cylinder and said piston; a crankcase attached to said cylinder; a crankshaft for rotation in said crankcase; a counterweight attached to said crankshaft; a connecting rod having two ends, a first end attached to said counterweight by a crank pin, and a second end connected to said piston by a connecting pin, wherein said piston is arranged to reciprocally drive said crankshaft via said connecting rod; a transfer passage providing fluid communication between the crankcase and the combustion chamber, the transfer passage opening into said crankcase at a transfer port; a laminate coupled to said counterweight; and a notch disposed along a portion of said laminate; wherein said laminate and said notch open and close said transfer port.