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Power Take Off Mechanism and Drive Patent

• CATEGORIES: Features • TAGS: .

Inventor David Stone filed a patent for a Power Take-Off Mechanism and Drive Therefor, with Willys Motors as the assignee, on August 08, 1950.

1950-08-19-pto-patent-1 1950-08-19-pto-patent-2 1950-08-19-pto-patent-3 1950-08-19-pto-patent-4


8 Comments on “Power Take Off Mechanism and Drive Patent

  1. Dave from Mn

    Looks like they were trying to do a live pto. Shaft running through the tranny main shaft connecting to motor crank shaft. That way when you stepped on the clutch the pto would continue to rotate. I wonder if any were built.

  2. David Eilers Post author

    Well that’s interesting. I need to take a closer look at the ad. It was the date of the filing that was puzzling me, but your answer may explain that.

  3. David Eilers Post author

    I’ll see if I can locate a better/clearer scan of the text. I didn’t realize just how bad the scan and subsequent text translation was.

  4. Allan J. Knepper

    That would have been a really nice upgrade to the Willys PTO system. As Dave Mn. has mentioned, it would have allowed a “live PTO” function. When using a rear PTO tool such as a bush hog rotary mower on either a Willys setup or a farm tractor, pushing in the clutch would also stop the mower. This could result in un-mowed grass at the end or rows or cuts when the clutch was pushed in to make turns. At about the same time as this patent, farm tractors were transitioning from “non live” to “live” PTO as an extra cost option …….later transitioning to standard equipment. I have had several 1955-1957 Case model 300 tractors from that era……used them for mowing……MUCH prefer the “live” PTO setups.

    Neat stuff Dave…….thanks again

  5. David Eilers Post author


    Thanks for the additional bits of info! That may explain why Willys Motors was looking investigating the tech.

    – Dave

  6. Barry

    Dave, another great find and worthy of more research. Many of the patents were captured by automatic OCR scanning devices and the quality isn’t always great. As stated, that would have a been an important upgrade.

  7. Bob

    That would be interesting, but without the “dual Clutch” setup of a tractor I’m not sure how easy it would have been to use.

  8. Dave from Mn

    While some tractors used a dual clutch system ,many did not. I don’t know all of it but it looks like they are using a band brake around a planetary, believe Farmall used something similar. May be wrong just going by my experience.

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