Patent ID: 11873802
Assignee: GRACO MINNESOTA INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 15:
16. The pump of claim 1, further comprising:
a switching valve connected to the first compression stage and the second compression stage, the switching valve actuatable to put the pump in a serial flow mode and a parallel flow mode, wherein:
in the serial flow mode, the switching valve fluidly connects an intake flow of gas with the first stage inlet and fluidly connects an outlet flow from the first stage outlet of the first compression stage with the second stage inlet;
in the parallel flow mode, the switching valve fluidly connects the intake flow of gas with the first stage inlet and the second stage inlet and fluidly connects the second stage outlet with a pump outlet; and
the second stage outlet is fluidly connected to the pump outlet during both the serial flow mode and the parallel flow mode.