Tire Pump (from Internet Glossary of Pumps)
Tire Pump
A bicycle tire pump works just like any other simple force pump such as a bilge pump or lift pump.

There is a valve blocking the flow of air out of the pump to the atmosphere while on the downstroke, and another valve stopping the flow of air from the tire to the pump cylinder during the upstroke.

Tire pumps come in a huge variety of shapes and styles but this is one of the most common varieties.

Some modern bicycle pumps deliver air on both the downstroke and the upstroke by having an additional set of valves. This reduces the time it takes to fill the tire.

(This is a still representation and possibly also a low-resolution image of a pump which is fully animated in the CD-ROM version of this glossary.)

Go to web page describing Statistics Explained

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Last modified February, 2002
Webmaster: Russell D. Hoffman
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