On Thu, 04 May 2006 11:34:40 -0500, Don Foreman
wrote:

SNIP

The patent talks about some grooves for exhaust. I couldn't make any
sense of that, but there is also a drawing in the patent that shows
the motor in various positions. The piston clearly rocks as the
motor runs. It looks to me like the piston seals when it's tilted
one way, also opening opening the inlet valve for the power stroke,
but air can leak around part of the piston during the recovery stroke
when the inlet valve is closed and the piston is tilted the other
way. There's a hole in the "crankcase" for exhaust to escape thru
when it has bypassed the piston.


OK. Thanks Don,

I didn't pursue the patent very far, just looked at the "video clip".

Take care.

Brian Lawson