Patent ID: 6299420
Filing Date: 2001-10-09
Classification: F04B

Abstract:
An air pump comprising:a first structure having a hollow interior;a piston slidably disposed in the housing to divide the hollow interior of the housing to first and second reservoirs, wherein as the piston moves toward a first direction, the first reservoir is compressed and as the piston moves toward a second direction, the second reservoir is compressed;a second structure having gaseous communication with the first structure, the second structure having intake and exhaust chambers which are not in gaseous communication with each other, the intake chamber being in gaseous communication with an intake port, the exhaust chamber being in gaseous communication with an exhaust port; andfirst and second intake check valves disposed in the air pump, wherein the first intake check valve provides gaseous communication between the second reservoir and the intake chamber when the piston moves in the first direction, and the second intake check valve provides gaseous communication between the first reservoir and the intake chamber when the piston moves in the second direction.