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Pawl Clutch

Animation of Pawl Clutch

The animation above illustrates the simplistic operation of this mechanism. This clutch was designed for use in 4WD vehicles. It is incorporated into the vehicle's transfer case and functions as a full time, all-wheel drive, completely mechanical device. This clutch directs power to the front wheels whenever the rear wheels start to slip, in either forward or reverse, without any input from the driver, and without any electronics or sensors.

This was developed for a company to replace its older technology. This device was awarded 2 patents, giving the company a technological advantage over the older design.

If you are interested in looking at the 2 patents for this invention, please click on the patent numbers below. You will need Acrobat Reader© from Adobe to view these files. Click the Acrobat logo below to get it.

US05967277 Get Acrobat Reader US05927455

Photograph of Pawl Clutch components


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