Patent ID: 8393873

Claim:
A compressor system comprising: a first pump having a first fluid output, said first pump being driven by a D/C motor; a second pump having a second fluid output, said second pump being driven by an A/C motor; and a switch which allows a user to manually selectively engage one of the D/C motor or A/C motor and disengage the other of the D/C motor or A/C motor; and a gauge coupled to a system hose and having a gauge face, said gauge having a user settable shut-off mechanism which functions to interrupt power to at least one of the D/C or A/C motors and a rotatable member having a movable needle stop, said rotatable member being movable from a first position with respect to the gauge face indicative of a first pressure to a second position indicative of a second pressure greater than the first pressure, wherein the gauge comprises a first needle rotatably coupled to a rotatable shaft, and a second needle fixably coupled to the rotatable shaft, said first needle being rotatable with respect to the shaft upon a change of pressure in the system hose so that the first needle will engage the needle stop and actuate the shut-off mechanism, said first needle being biased toward the second needle via a first biasing spring and wherein the second needle is configured to indicate the pressure in the system greater than the second pressure, and wherein said first and second needles move together from the first position to the second position in response to an increase in pressure within one of the first or second fluid outputs.