Patent ID: 11905943
Assignee: FLUKE CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A multi-stage electric gas pump, comprising:
an eccentric shaft including a main body having a longitudinal axis, a first eccentric portion, and a second eccentric portion, wherein the first eccentric portion and the second eccentric portion are fixed on the main body, the eccentric shaft is driven by a driving mechanism to produce a first circular movement of the first eccentric portion around the longitudinal axis and a second circular movement of the second eccentric portion around the longitudinal axis, and the second circular movement is synchronized with the first circular movement;
a first cylinder including a first chamber and a first piston rod, the first piston rod being connected to the first eccentric portion;
a second cylinder in fluid communication with the first cylinder, the second cylinder including a second chamber and a second piston rod, the second piston rod being connected to the first eccentric portion; and
a third cylinder in fluid communication with the second cylinder, the third cylinder including a third piston rod and a third chamber, the third piston rod being connected to the second eccentric portion;
wherein the first piston rod and the second piston rod are connected to the first eccentric portion by way of a first crank, the first crank having a first end and a second end, wherein the first end of the first crank is connected to the first eccentric portion, and the second end of the first crank is connected to at least one of the first piston rod or the second piston rod by way of a first cam bearing that is offset from the first eccentric portion, the second piston rod and the first piston rod being connected to each other away from the first eccentric portion.