F - Mech Eng,Light,Heat,Weapons – 02 – G
Patent
F - Mech Eng,Light,Heat,Weapons
02
G
60/31
F02G 1/043 (2006.01) F28D 17/00 (2006.01)
Patent
CA 1226443
ABSTRACT Mechanical arrangements with primary application to single-acting, multiple-piston, Stirling-cycle machines pro- viding a dramatic reduction in mechanical complexity and production cost. Two specific new machines are disclosed in detail, a single-acting, two-piston "ducted axle" machine and a quasi double-acting, four-piston, "drum cam" machine. A power level control subsystem inherent in the ducted axle machine permits engine output to vary from maximum positive through zero to maximum negative under full load conditions by means of the simple rotation of a single moving part. New thermodynamic working fluids are disclosed which have a higher dynamic heat transfer coefficient than either hydrogen or helium and are both chemically inert and easily liquefied. A different power level control subsystem for Stirling-cycle prime movers based on the thermophysical properties of these fluids greatly simplifies changing the average system working pressure. A new construction of the Stirling regenerator employs the anisotropic properties of materials such as pyro- lytic graphite to achieve superior performance. Advantageous specific applications of copper matrix composites, manganese- copper alloys, and structural ceramics are disclosed.
515734
Moscrip William M.
Osler Hoskin & Harcourt Llp
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