Power plants – Motive fluid energized by externally applied heat – Process of power production or system operation
Patent
1975-11-03
1977-03-29
Ostrager, Allen M.
Power plants
Motive fluid energized by externally applied heat
Process of power production or system operation
60721, F01K 2500, F02G 100
Patent
active
040141721
ABSTRACT:
An air driven engine of the reciprocating piston type wherein the pistons are each disposed in their own cylinder and connected in cranking relation to the crank shaft that is the powered component of the engine, in which the piston power strokes are effected using heated air under pressure, and their return strokes are accentuated by exposing the working surfaces of the pistons to a cooled source of vacuum. Timer mechanisms are provided for controlling the sequencing of the differential force applications to the pistons. The sources of air pressure and vacuum are tanks associated with the engine. The apparatus includes an air pump operated as required through a crank shaft to restore the pressure and vacuum tanks to the desired pressure levels, this being done by recycling the air through the system with adequate make up as required to replace energy losses due to friction and leakage.
REFERENCES:
patent: 590228 (1897-09-01), Knight
patent: 774778 (1904-11-01), Pratt
patent: 3563032 (1971-02-01), LaPointe
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