Pumps – Motor driven – Fluid motor
Patent
1990-11-14
1992-03-03
Bertsch, Richard A.
Pumps
Motor driven
Fluid motor
417387, 91307, F04B 1700, F04B 908, F01L 2502
Patent
active
050927450
ABSTRACT:
A compressor (2) uses lower pressure compressed air from a compressed air supply (4, 6) to automatically create higher pressure compressed air. This compressor includes a pressure intensifier (8) having a piston assembly (16) sized for reciprocal movement between forward and retracted positions. The first cylinder (20) has an inlet (10) coupled to the air supply. The second cylinder (22) has an outlet (14) and a supplemental inlet (38). A first check valve (40) couples the supplemental inlet to the ambient atmosphere to permit fluid to flow through the first check valve and into the second cylinder through the supplemental inlet, but not the reverse. A second check valve (42) is coupled to the outlet and permits fluid to flow from the second cylinder, through the outlet and through the second check valve. The compressor also includes means for venting (48) the first cylinder to atmosphere when the piston assembly is in the forward position to permit the piston assembly to return to the retracted position. A shut-off valve (124) can be used to halt operation of the pressure intensifier when sufficient air pressure has been attained. A transfer valve (150) can be used to automatically permit air to flow from a high pressure tank (154) to a low pressure tank (152) when the presure level in the low pressure tank has dropped below a predetermined level.
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Basichas Alfred
Bertsch Richard A.
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