PUMP (2)

pump (2). Pump, v. to work a pump, to discover artfully

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Pump, n. [[Akin to D. pomp, G. pumpe, F. pompe; of unknown origin.]] An hydraulic machine, variously constructed, for raising or transferring fluids, consisting essentially of a moving piece or piston working in a hollow cylinder or other cavity, with valves properly placed for admitting or retaining the fluid as it is drawn or driven through them by the action of the piston. ☞ for various kinds of pumps, see Air pump, Chain pump, and Force pump; also, under Lifting, Plunger, Rotary, etc. Circulating pump (Steam Engine), a pump for driving the condensing water through the casing, or tubes, of a surface condenser. — Pump brake. See Pump handle, below. — Pump dale. See Dale. — Pump gear, the apparatus belonging to a pump. Totten. — Pump handle, the lever, worked by hand, by which motion is given to the bucket of a pump. — Pump hood, a semicylindrical appendage covering the upper wheel of a chain pump. — Pump rod, the rod to which the bucket of a pump is fastened, and which is attached to the brake or handle; the piston rod. — Pump room, a place or room at a mineral spring where the waters are drawn and drunk. — Pump spear. Same as Pump rod, above. — Pump stock, the stationary part, body, or barrel of a pump. — Pump well. (Naut.) See Well.