ALEXANDRIA, Va., June 25 -- United States Patent no. 12,336,454, issued on June 24, was assigned to LELY PATENT N.V. (Maassluis, Netherlands).
"Self propelled mower with safety device" was invented by Dik-Jan Wisse (Maassluis, Netherlands) and Ruth De Jong (Maassluis, Netherlands).
According to the abstract* released by the U.S. Patent & Trademark Office: "An autonomous self-propelled mowing vehicle includes a frame fitted with a drive mechanism, a mowing device for mowing plants, a bumper device, and a control unit. The bumper device includes a first and a second impact detector. The first impact detector is depressible up to a stop and is provided with a first switch which emits a first signal to the control unit at a first switching po...