Patent ID: 8182246

Claim:
A high pressure pump system, comprising: a) a shaft mounted to a electrically driven rotary device; b) said shaft comprising a cam; c) means for rotation of said shaft and said cam, with said rotating device; d) at least two pressurizing subassemblies selectively connected with said cam, each pressurizing subassembly including: i) a strokable piston rod, whereas the stroke is determined by said cam rotation; ii) a cam follower support connected to said piston rod; iii) a high pressure cylinder assembly to receive the stroke of said piston rod, with said high pressure cylinder assembly including at least one sealed interface between said piston rod and said high pressure cylinder assembly; iv) an upstream low pressure check valve assembly, and a downstream high pressure check valve assembly; e) at least a first and second said pressurizing subassembly with means to be connected to a common outlet for the transportation of high pressure liquid to at least one system head device via high pressure piping, f) a drive mechanism controlling said rotary device with means for compensation of the system pressure fluctuations of said high pressure liquid to achieve a constant flow rate via said drive mechanism's variable control of electrical current draw each rotation cycle of said shaft, wherein the total said volume of the high pressure pump system is from said inlet check valves to said system head(s); wherein the high pressure liquid volume is compressed within the said system, and the relationship of liquid compression between the inlet check valves to the system head(s) is directly related to compensation of the flow rate pressure fluctuation via the variation of the electric current draw in the drive mechanism.