136427 ⎘
Machines or engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders with two or more pistons reciprocating one within another, e.g. one piston forming cylinder of the other
PISTON IN PISTON VARIABLE DISPLACEMENT HYDRAULIC DEVICE
#2Engine with gas exchange through piston rod
#3Engine with at least one of non-sinusoidal motion and embedded pistons
#4Engine with work stroke and gas exchange through piston rod
#5POSITIVE DISPLACEMENT HEAT MACHINES WITH SCAVENGING
#6Engine with work stroke and gas exchange through piston rod
#7Engine with work stroke and gas exchange through piston rod
#8Methods of predicting mortality risk by determining telomere length
#9Two-stroke internal combustion engine with crankcase lubrication system
#10Engine with compression and momentum stroke
#11Gapless piston ring for internal combustion engine
#12Timed gas exchange in engine using piston as exhaust valve
#13Method and apparatus for achieving higher thermal efficiency in a steam engine or steam expander
#14High efficiency dual cycle internal combustion steam engine and method
#15High efficiency multicycle internal combustion engine with waste heat recovery
#16Drive device using charged air pressure
#17Piston in piston variable displacement hydraulic device