h a l f b a k e r yRecalculations place it at 0.4999.
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The idea is for hubcaps with a tiny offset shaft and weight. At low speeds gravity and tire spin cause the weight to spin the shaft and pump air into the tire if required. The shafts lock at high speed to prevent vibration.
(?) Tire pumping hub.
http://patft.uspto....+AND+TTL/automatic)
Fully baked. [oxen crossing, Oct 21 2004]
[link]
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Love it!.. integrated with an over-pressure bleed valve in the tire, so it can also lower pressure if needed. |
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A tire's pressure can change by 1 psi for every 10 degrees Fahrenheit of temperature change. And when you start running tires down a hot asphalt highway, they can heat up fast. |
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Yes! Different settings for snow or muddy conditions where tire pressure is a big traction factor. +++ |
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Now I can imagine someone coming out of the house, noticing they got a flat tire overnight.. He jacks the car up, puts it in gear and lets it pump itself up to pressure. |
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I thought we hit the jackpot when
my brother and I invented this on
the phone a few months ago.
Then I looked at uspto.gov [link],
and
realized we we're too late. |
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So, in theory, if the hole was not too large, you would never get a flat tire as long as you kept moving........ |
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How big a weight would be necessary to prevent the hubcap from spinning relative to the ground? |
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If the weight is offset, what keeps it from vibrating the wheel, when the shaft is locked and the speed is high? |
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