Emil Stumpf's PTO patent

Posted by jdemaris on February 07, 2010 at 16:02:55 from (67.142.130.30):

In Reply to: Re: independent pto problems posted by Ultradog MN on February 07, 2010 at 12:10:59:

I've seen mention in old tractor literature and many patents of having a PTO "independent" of the wheel drive. Most words and phrases have different meanings in different places and times. Until I see something definitive to the contrary, I'm going to assume the "live" versus "independent" versus "continuous" (and maybe a few more) were products of marketing and companies selling tractors. All wanting to sound like they had something better and different.

Emil Stumpf of Illinois got the first U.S. patent for a "continous PTO" for ag. tractors in 1940 (filed in 1942). He called it many things including "independent."

So did Henry A. Ferguson in his 1956 Patent (better know as Harry Ferguson).

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