I used sink plungers in toilets pretty much my whole life until i scrolled across a similar diagram one day and discovered the truth.
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Here’s the second iteration of the OG patent.
Originally the simply device on the left was the one plunger to rule them all. It works in sinks and toilets. The flange and the concept of a toilet-specific plunger was a later concept.
Yup, started with the cup and derived into the flange.
Thanks for linking the US patent!
Why has no one mentioned this style? I’ve had one for years, and there’s never been a clog it couldn’t fix.
