Automotive Dictionary: Geared Pump (or Spur-Gear Pump)

Throughout this site we use many technical terms, and given the breadth of readership our site enjoys, sometimes we are remiss and incorrectly assume everyone knows what we are referring to. For those that do not, here are some explanations of the technical terms use.

Geared Pump (or Spur-Gear Pump)

A pump for propelling liquid. Frequently used as an oil pump in an engine. It has two mating wheels, rotating in opposite directions, which carry oil between the gear teeth and the almost contacting wall of the chamber from the inlet orifice on one side to the outlet orifice, thus ensuring that sufficient oil pressure is created to properly lubricate the engine.