Re: Water pump information

[Bob Sciamanda <trebor@VELOCITY.NET>]

This is touted as a Russian pump?
When I was a kid on a farm this was exactly what we (and everyone else)
used, both outside at the feeding trough, and inside at the kitchen sink.

Bob Sciamanda (W3NLV)
Physics, Edinboro Univ of PA (em)
trebor@velocity.net
www.velocity.net/~trebor
----- Original Message -----
From: "Herbert H Gottlieb" <herbgottlieb@JUNO.COM>
To: <PHYS-L@lists.nau.edu>
Sent: Thursday, February 07, 2002 3:10 PM
Subject: Re: Water pump information


> I believe that you are referring to the
> old-fashioned push-the-handle-down-and-
> water-comes-out-of-the-spout lift pump.
>
> 1. Pressing the pump handle down lifts a piston
> surrounded by a wet leather gasket that closely fits
> the vertical water pipe of the pump.
>
> 2. As the piston rises, the air pressure below the piston
> is reduced and water below the piston is forced upward
> in the pipe by the greater external air pressure surrounding it.
>
> 3.Raising the pump handle then lowers the piston
> into the water and some of this
> water goes through a one-way valve in the piston
> as it is lowered and cannot return through
> the one-way valve.
>
> 4. Lowering the pump handle again , raises the piston.
> As the water above the piston spills out of the pump spout,
> water below the piston again rises due to the lowered
> air pressure.
>
> Further lifting an lowering the pump handle continues
> to maintain an outflow
>
> Herb Gottlieb from New York City
> (Where water comes out of our faucets at home without
> the benefit of human inervenion)