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Most rotary push mowers are powered by internal combustion engines. Such engines are usually four-stroke engines, used for their greater torque and cleaner combustion (although a number of older models used two-stroke engines), running on gasoline (petrol) or other liquid fuels. Internal combustion engines used with lawn mowers normally have ...
In 1946, Joel G. (Jack) Doyle built the first rotary lawnmower for the Rotary Power Mower Company of Lamar, Missouri. Doyle accumulated orders for these mowers from Sears Roebuck, Gimbels, Spiegel, and other businesses. OMC then bought RPM in 1952, and changed the brand of the rotary lawn mower to the Lawn-Boy name.
An American rotary lawnmower mechanic (b. 1927) when queried as to the first rotary mower he knew of - produced a picture of a machine mass produced around 1939 which originally used a Ford Model A or B electric starter motor turned vertically with a steel disc attached to the output shaft having common sickle bar trapezoidal blades riveted upon it.
The mower is a variation of the petrol-powered rotary push lawn mower, but uses a fan above the mower's spinning blades to allow the mower's body to hover over the lawn. The mower is claimed to be more manoeuvrable and easier to push than wheeled petrol mowers, while delivering similar results.
A Victa lawn mower. Victa is an Australian manufacturer of outdoor garden equipment, including petrol, electric, and battery-powered lawn mowers, edgers, trimmers, and chainsaws. The brand is best known as a manufacturer of rotary lawn mowers. In the early 1960s the company also built light aircraft, notably the Victa Airtourer, and project homes.
Two archetypes of this type of mower are the Bush Hog which is made by Bush Hog, Inc. [1] of Selma, Alabama, and the Flex-Wing by RhinoAg of Gibson City, Illinois.The formal name for this type of implement is a rotary cutter or rotary mower, although it differs from mowers in that it does not cut with a sharp blade, but rather severs with an intentionally very dull wedge-like blade.