Battery-powered walk-behind greensmower
AssigneeTextron Inc.
InventorBenjamin D. Dettmann
Life of this patent
Estimating the term…
Abstract
A greensmower having a cutting reel and a traction member and an independent electric circuit and motor for driving each. A handle is attached to the reel for mower guidance by an operator in a walk-behind position. Separate electric controls are connected to each motor for separate speeds for each motor and thereby control the clip rate of the mowing. There are low battery power read-outs and automatic shutoffs. Provision is made for traction powering of the mower even when the reel motor is not operating because of low battery power. A lift-out battery pack is shiftably mounted on the mower for producing the desired force of the mower on the ground.
Claims4
A battery-powered walk-behind greensmower for movement on the ground in a mowing direction of movement comprising:
- a mobile structure having a rotatable ground-engaging traction member for imparting traction movement to said mower for movement on the ground in the mowing direction of movement,
- a handle connected with said structure for guiding said mower in the mowing direction,
- a bed knife supported by said structure and having a cutting edge extending along a line transverse to the mowing direction,
- a grass cutting reel rotatably supported on said structure on a rotation axis and having cutting blades equally spaced around said axis for orbiting of said blades about said axis and being disposed in grass cutting relationship with said bed knife and having said blades equally spaced apart from each other and disposed to sequentially move past said bed knife cutting edge to establish a clip-rate for cutting grass in proportion to the speed of rotation of said reel,
- a first electric motor supported on said structure and being in rotational driving relationship with said reel for rotating said reel,
- a second electric motor supported on said structure and being in rotational driving relationship with said traction member and being located adjacent a first axial end of said reel,
- a battery tray supported on said structure and being located adjacent a second axial end of said reel and being positioned to counter-balance the weight of said second electric motor on said structure,
- a battery supported on said tray, and
- an electric circuit electrically connected between said battery and both said motors for rotation of said reel and said traction member.
A battery-powered walk-behind greensmower for movement on the ground in a mowing direction of movement comprising:
- a mobile structure having a rotatable ground-engaging traction member for imparting traction movement to said mower for movement on the ground in the mowing direction of movement,
- a handle connected with said structure for guiding said mower in the mowing direction,
- a bed knife supported by said structure and having a cutting edge extending along a line transverse to the mowing direction,
- a grass cutting reel rotatably supported on said structure on a rotation axis and having cutting blades equally spaced around said axis for orbital movement of said blades about said axis and being disposed in grass cutting relationship with said bed knife and having said blades equally spaced apart from each other and disposed to sequentially move past said bed knife cutting edge to establish a clip-rate for cutting grass in proportion to the speed of rotation of said reel,
- a battery on said structure,
- two independent electric drive trains connected with said battery and each of said drive trains including an electric circuit and an electric motor,
- a first one of said drive trains being connected with said reel for rotating said reel at only a constant speed,
- a second one of said drive trains being connected with said traction member and including an adjustable electric variable resistor for driving said traction member at varying selective speeds in the mowing direction and thereby control the grass clip-rate in direct proportion to the selected traction speed,
- said motor in said second drive train being located adjacent a first axial end of said reel,
- a battery tray supported on said structure and being located adjacent a second axial end of said reel and being positioned to counter-balance the weight on said structure of said electric motor in said second drive train, and
- said battery supported on said tray.
Dependencies are inferred from the claim text.