High pressure gas compressor

A gas compressor comprising:

• a cylindrical chamber, said cylindrical chamber including a main gas cylinder and a main hydraulic cylinder;
• a free piston placed within said cylindrical chamber, said free piston dividing the main gas cylinder and the main hydraulic cylinder and having a gas side and a hydraulic side;
• a main gas cylinder end wall closing the main gas cylinder of said cylindrical chamber, said gas cylinder end wall having a low pressure opening therein and a high pressure opening therein;
• a main hydraulic cylinder end wall closing the main hydraulic cylinder of said cylindrical chamber, said main hydraulic cylinder end wall having an oil opening therein;
• a plurality of cylinders;
• a plurality of pistons, one of said plurality of pistons placed within each of said plurality of cylinders, each of said plurality of pistons having a drive side and a return side;
• a shaft connected to said plurality of pistons;
• a hydraulic piston connected to one end of said shaft;
• a hydraulic cylinder associated with said hydraulic piston;
• a relatively low pressure gas source selectively connected to the drive side and the return side of said plurality of pistons, whereby the plurality of pistons are driven moving said shaft;
• an oil tank selectively coupled between said hydraulic cylinder and the oil opening in said main hydraulic cylinder end wall;
• a high pressure gas valve connected to the high pressure opening, said high pressure gas valve opening after a predetermined pressure is obtained;
• and
• a gas storage tank connected to said high pressure gas valve,
• whereby said relatively low pressure gas source drives said plurality of pistons connected to said shaft and hydraulic piston which pumps hydraulic fluid into the main hydraulic cylinder causing said free piston to move generating a relatively high gas pressure at the high pressure opening.

A method of operating a compressor comprising the steps of:

• compressing a gas to a predetermined pressure with hydraulic fluid;
• compressing the hydraulic fluid to a pressure higher than the predetermined pressure;
• and
• releasing the hydraulic fluid,
• whereby the release of the hydraulic fluid causes cooling.

A hydraulic pump comprising:

• a plurality of gas chambers;
• a plurality of gas pistons, one of said plurality of gas pistons placed within each of said plurality of gas chambers;
• a shaft connected to each of said plurality of gas pistons;
• a hydraulic piston connected to one end of said shaft;
• a hydraulic chamber, said hydraulic piston extending within one end of said hydraulic chamber, said plurality of gas chambers, plurality of gas pistons, shaft, hydraulic piston, and hydraulic chamber all having a common axis;
• and
• a gas source, said gas source coupled to each of said plurality of gas chambers,
• whereby said gas source drives said plurality of pistons causing said hydraulic piston to advance within said hydraulic chamber.

A hydraulic pump comprising:

• a plurality of gas chambers:
• a plurality of gas pistons, one of said plurality of gas pistons placed within each of said plurality of gas chambers;
• a shaft connected to each of said plurality of gas pistons;
• a hydraulic piston connected to one end of said shaft;
• a hydraulic chamber, said hydraulic piston extending within one end of said hydraulic chamber;
• and
• a gas source, said gas source coupled to each of said plurality of gas chambers,
• each of said plurality of pistons has a drive side and a return side;
• and
• said gas source is selectively coupled to the drive side and the return side,
• whereby said gas source drives said plurality of pistons causing said hydraulic piston to advance within said hydraulic chamber.