Engines, or prime movers

An improved engine comprising:

• an engine block having first and second opposed sides;
• a cavity formed in the first side of said engine block for confining a working fluid under pressure, said cavity having an aperture in one of its walls;
• an axially movable bellows member having a plurality of inwardly directed corrugations positioned within said cavity, said bellows having an extended normal state and an aperture in one of its walls, the bellows aperture sealed to the aperture in said cavity by a sealing means thereby preventing escape of said working fluid from said cavity and providing an opening from the inner portion of said bellows member to the atmosphere;
• means for introducing said working fluid into said cavity comprising an intake valve port within said engine block and open to said second side thereof, said port being disposed radially outwardly of said cavity, a first conduit from said valve port projecting exterior of said engine block, a second conduit postioned between said intake valve port and cavity and an intake valve positioned between the first and second intake conduits and having a spring for holding said intake valve in a normally closed position preventing flow into said cavity and operable to an open position against said spring for passing said fluid into said cavity and compressing said bellows member;
• means for exhausting said working fluid from said cavity comprising an exhaust valve port within said engine block and open to said second side thereof, said port being disposed radially outwardly of said cavity, a first conduit from said exhaust valve port to said cavity, a second conduit from said exhaust valve port projecting exterior of said engine block and an exhaust valve positioned between said first and second exhaust conduits and having a spring for holding said exhaust valve in a normally closed position preventing the flow of said working fluid from said cavity and operable to an open position against said spring for exhausting said working fluid from said cavity and returning said bellows member to a normal state;
• a rod member having a diameter substantially smaller than said apertures attached by attaching means to the inner end surface of said bellows member remote from said apertures projecting external of said engine block through said apertures, said rod member having a first direction of translation while said bellows member is compressing and a second direction of translation when said bellows member is returning to a normal state;
• and
• a valve cover plate positioned against said second side of said engine block and over said valve ports and secured to said block by securing means for sealing said valve ports from the atmosphere and supporting said valve springs.