Two stroke steam-to-vacuum engine

Details Two stroke steam-to-vacuum engine Two stroke steam-to-vacuum engine

2005-10-04

2005-10-04

Nguyen, Hoang (Department: 3748)

Power plants

Motive fluid energized by externally applied heat

Power system involving change of state

Reexamination Certificate

active

06951107

ABSTRACT:
A two stroke steam-to-vacuum engine comprises a first cylinder (12) having a first piston (16), a first piston rod (18), and a first steam chamber (24), and a second cylinder (14) having a second piston (30), a second piston rod (32), and a second steam chamber (38). Each piston is reciprocally moveable between an expanded position and a collapsed position. Admission of steam at atmospheric pressure into the steam chambers (24, 38) is controlled by steam valves (52, 54) and exposure of the steam chambers (24, 38) to a vacuum is controlled by vacuum valves (56, 58). The piston rods (18, 32) are fixed for simultaneous reciprocation such that a power stroke in one cylinder produces a steam intake stroke in the other cylinder. Steam to the steam chambers (24, 38) is supplied through a steam reservoir (42) and a solar power source (44), from a boiler, a fuel of choice, or a variety of alternate sources of heat.

REFERENCES:
patent: 740117 (1903-09-01), Fraley
patent: 768691 (1904-08-01), Pratt
patent: 2363708 (1944-11-01), Urquhart
patent: 2456124 (1948-12-01), Hoffman
patent: 3918263 (1975-11-01), Swingle
patent: 4229943 (1980-10-01), Kriegler
patent: 4624109 (1986-11-01), Minovitch
patent: 4698973 (1987-10-01), Johnston
patent: 6128903 (2000-10-01), Riege

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