Timeline for How do tire pumps work?
Current License: CC BY-SA 3.0
4 events
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| Jun 5, 2017 at 11:39 | comment | added | Graham | That video is neat, but it glosses over the valve operation. In practise, all you have is a curved rubber seal between the plunger and the pump body. The curve of the seal ensures a higher air pressure in the chamber pushes it tighter to the pump wall, so it stays sealed as you pressurise it. The higher pressure pushes the tyre valve open, and compressed air goes in. On the return stroke, the non-return valve in the tyre seals itself, and the resulting lower pressure in the chamber lets the seal collapse and air come in round the edges. | |
| Jun 5, 2017 at 10:48 | comment | added | Nigel Touch |
And the inner tube has a valve which allows air in, but not out.
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| Jun 4, 2017 at 23:11 | vote | accept | clickbait | ||
| Jun 4, 2017 at 22:38 | history | answered | bobflux | CC BY-SA 3.0 |