Patent ID: 7874807

Claim:
A compressor system comprising: a first pump having a first high pressure output, said first pump being driven by a D/C motor; a second pump having a second high pressure 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 a second of the D/C motor or A/C motor; wherein said first and second high pressure outputs being fluidly coupled to a gauge having a gauge face and to a system hose, said gauge having a user settable shut-off mechanism which functions to interrupt power to at least one of D/C or A/C motors wherein the gauge comprises a rotatable bezel having a movable needle stop, said bezel being movable from a first position indicative of a first pressure to a second position indicative of a second pressure greater than the first pressure, with respect to the gauge face; wherein the gauge comprises a first needle rotatably coupled to a rotatable shaft, and a second needle fixablv coupled to the rotatable shaft, said first needle being rotatable 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; wherein said first and second needles move together from the first position to the second position in response to an increase in pressure within the first pressure outputs.