US 12,171,158 B2
Lawnmowers with safety features and methods associated therewith
Grzegorz Kondro, Piedmont, SC (US); Shuai Shao, Simpsonville, SC (US); Robert T. Givens, Anderson, SC (US); Ayesha Iftiqhar, Greenville, SC (US); and Jonathan R. Feldkamp, Anderson, SC (US)
Assigned to TECHTRONIC CORDLESS GP, Anderson, SC (US)
Filed by TECHTRONIC CORDLESS GP, Anderson, SC (US)
Filed on Sep. 1, 2023, as Appl. No. 18/241,362.
Application 18/241,362 is a continuation of application No. 17/153,249, filed on Jan. 20, 2021, granted, now 11,793,109.
Claims priority of provisional application 62/976,070, filed on Feb. 13, 2020.
Prior Publication US 2023/0403973 A1, Dec. 21, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. A01D 34/68 (2006.01); A01D 34/00 (2006.01); A01D 34/82 (2006.01); A01D 43/063 (2006.01); A01D 101/00 (2006.01)
CPC A01D 34/008 (2013.01) [A01D 34/6806 (2013.01); A01D 34/6818 (2013.01); A01D 34/828 (2013.01); A01D 43/0631 (2013.01); A01D 2101/00 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A lawnmower comprising:
a body;
a cutting element coupled with the body;
a motor configured to drive the cutting element;
one or more sensors configured to detect an angular displacement of the lawnmower with respect to a vertical axis and a wobble of the cutting element; and
a processor configured to:
compare the detected angular displacement against a tilt threshold value;
compare the detected wobble against a wobble threshold value; and
control an operational speed of the cutting element when the angular displacement exceeds the tilt threshold value or when the wobble exceeds the wobble threshold value,
wherein the processor is further configured to filter noise from the detected angular displacement, the noise associated with the wobble.