I assume they are two separate patents by two separate companies, but once those are both on the same can opener, there will be no reason to buy any other manual can opener. So when is the first one expiring?
I assume they are two separate patents by two separate companies, but once those are both on the same can opener, there will be no reason to buy any other manual can opener. So when is the first one expiring?
Cut the existing handle off the shaft - most likely the shaft is knurled so the injection-molded plastic will grip it.
Either attach a handle with a clamping mechanism (see motorcycle brake and shifter levers), or simply weld a handle on.
Before I were to go to that much trouble, I’d weld a 1/4 hex shaft on it, so I could use a drill or impact driver.