more applications for the uniport valve  

New Animation  of  the 'Dual Pressure Intake Compressor'
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Reciprocating Compressor >

The animation to the right shows a compressor that uses a Patented Double Acting Valve or Uniport Valve. The conventional poppet valve colored blue is actuated by the blue cam. The 'Auxiliary Valve', colored pink, is actuated by a pair of cams.  This eliminates the need for a spring for this particular part. However the other two parts are biased by springs. One spring is shown in a cross section rapped around the cylindrical part in red. Not shown is the torsion bar (similar to what was used on the Honda CB450 motorcycle) that would turn the short rocker arm which in turn helps close the conventional poppet valve.
Intake and Exhaust Valve Working Through a Single Port in a Conventional Four Cycle Engine

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See the - "Scott Russell Straight Line Generator"
a mechanism which could be used in the valve actuation system
 More Engine Applications
Conventional Four Cycle Internal Combustion Engines
With the correct materials and  careful design the Uniport Valve could be used to handle exhaust gas too. To the left is a Conventional Four Cycle Engine using an Uniport Valve which allows both the exhaust and intake gas to pass through the same port. Click here to see a conventional four cycle internal combustion engine designed for a Harley motorcycle.

Conventional Four Cycle Internal Combustion Engine Presentation 

Special Engine Cycles that require multiple exhaust runners
Again, if the parts are designed so that they can withstand the heat from the exhaust gases; it would allow unique induction systems that split up the blow-down gas from the exhaust stroke gas. The higher pressure differental should make the turbochargers work more efficiently.