US 12,435,527 B2
Battery powered hand-operated troweling machine
Samuel K. Esh, Quarryville, PA (US); and David King, Paradise, PA (US)
Filed by S.K.E. Masonry, Christiana, PA (US)
Filed on Aug. 31, 2022, as Appl. No. 17/900,609.
Claims priority of provisional application 63/307,294, filed on Feb. 7, 2022.
Prior Publication US 2023/0250651 A1, Aug. 10, 2023
Int. Cl. E04F 21/24 (2006.01); F16H 1/28 (2006.01)
CPC E04F 21/248 (2013.01) [F16H 1/2854 (2013.01); F16H 1/28 (2013.01); F16H 2001/2872 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A hand-operated troweling machine, comprising:
a rotatable blade assembly having a plurality of rotatable blades for finishing a recently poured concrete surface;
an electric motor operably connected to said rotatable blade assembly to drive rotation thereof;
a gearbox interconnecting said electric motor and said blade assembly, said gearbox having:
a housing;
a rotatable ring gear rotatably supported in said housing, said ring gear having a spur gear formed on an underside thereof;
a pinion gear rotatably driven from said electric motor and being engaged with said rotatable ring gear to affect rotation thereof; and
a planetary gear set positioned below said rotatable ring gear and being engaged with said spur gear, said planetary gear set including:
a fixed ring gear fixed to said housing;
a plurality of planet gears engaged with both said spur gear and with said fixed ring gear such that said planet gears rotate around said fixed ring gear when driven by said spur gear; and
a rotatable plate having mounted on one side thereof a plurality of stub shafts on which said planet gears are respectively mounted, and an output shaft projecting downwardly to drive the rotation of said blade assembly;
a battery assembly electrically coupled with said electric motor to power operation thereof; and
a control mechanism interconnected between said battery assembly and said electric motor to control the operation of said electric motor.