The Simplex, or Single-Cylinder Double Acting,
Pump was invented in 1840 by Henry R. Worthington.
A Simplex Pump is a reciprocating
pump. This pump has a single liquid cylinder which forces liquid out through the
top outlet on both the in and the out stroke (here up and down.)
type of pump might be used for Air Pumps, Feed Pumps for the furnace, Fire, Bilge,
and Fuel Oil Service. All might rely on this fundamental pump.
PUMP is similar to the Simplex pump, having two pistons instead of one, providing
smoother operation. From the outside a simplex pump can take many forms but the
basic concept follows this illustration.