A lawnmower with a plurality of blade holding elements in a horizontally rotating blade assembly holds a plurality of multi-ductility blades with a maximum thickness of 0.075 inches in a blade channel and in a substantially tangential orientation. The multi-ductility blades include a hardened cutting edge of Rockwell hardness greater than 50 and ductile portion with Rockwell hardness less than 50.

The invention relates to a device for comminuting, collecting and transporting of comminuted material, comprising a frame that is designed to be supported by a vehicle, a tool carrier rotor that is accommodated by the frame by means of an axis that is substantially parallel to the treated bottom and perpendicular to the driving direction of the vehicle, a drive that moves a shaft which is kinematically connected to the tool carrier rotor, and a cover that surrounds the tool carrier rotor on the upper side and that is connected to a feed channel. According to the invention at least one blower is provided in the cover and/or in the channel, which blower supports the flow of the material crushed by the tool carrier rotor, wherein at least two blowers are provided that are parallel to one another, that rotate in opposite directions, and that have a common chute.

The invention relates to a device for comminuting, collecting and transporting of comminuted material, comprising a frame that is designed to be supported by a vehicle, a tool carrier rotor that is accommodated by the frame by means of an axis that is substantially parallel to the treated bottom and perpendicular to the driving direction of the vehicle, a drive that moves a shaft which is kinematically connected to the tool carrier rotor, and a cover that surrounds the tool carrier rotor on the upper side and that is connected to a feed channel. According to the invention at least one blower is provided in the cover and/or in the channel, which blower supports the flow of the material crushed by the tool carrier rotor, wherein at least two blowers are provided that are parallel to one another, that rotate in opposite directions, and that have a common chute.

A lawnmower uses thin, replaceable blades with a hardened cutting edge and a cross-section defining an airfoil retained in cartridges that are inserted and removed from rotors in a blade assembly at need. The cartridges comprise a blade and rotor interlocking elements affixed to the blade, each rotor interlocking element corresponding to one rotor in the blade assembly. Each rotor and rotor interlocking element includes features that allow the two to be securely engages so that the rotors may be spun quickly in a mower blade assembly to cut grass.

A lawnmower with a plurality of blade holding elements in a horizontally rotating blade assembly holds a plurality of blades in a blade channel. The blade assembly is covered by a blade assembly guard that is only open underneath at a point where blades in the blade assembly would cut grass during normal operation. A blade assembly access panel in the upper portion of the blade assembly guard allows blades or a blade assembly to be easily replaced.

A lawnmower with a plurality of blade holding elements in a horizontally rotating blade assembly holds a plurality of blades in a blade channel. The blade assembly is covered by a blade assembly guard that is only open underneath at a point where blades in the blade assembly would cut grass during normal operation. A blade assembly access panel in the upper portion of the blade assembly guard allows blades or a blade assembly to be easily replaced.

A lawnmower with a plurality of blade holding elements in a horizontally rotating blade assembly holds a plurality of replaceable blades in a blade channel. The blade assembly is covered by a blade assembly guard that is only open underneath at a point where blades in the blade assembly would cut grass during normal operation. A blade assembly access panel in the upper portion of the blade assembly guard allows blades to be easily replaced.

A lawnmower with a plurality of blade holding elements in a horizontally rotating blade assembly holds a plurality of replaceable blades in a blade channel. The blade assembly is covered by a blade assembly guard that is only open underneath at a point where blades in the blade assembly would cut grass during normal operation. A blade assembly access panel in the upper portion of the blade assembly guard allows blades to be easily replaced.

A walk reel mower has a reel cutting unit carried by the frame, wherein the reel cutting unit comprises a laterally extending cutting reel rotatably journalled between a pair of laterally spaced inserts for rotation about a substantially horizontal rotational axis, the cutting reel having a plurality of blades. The reel cutting unit is removably mounted to a pair of laterally spaced side plates of the frame, wherein the pair of inserts are located on opposite ends of the laterally extending cutting reel such that the pair of inserts are at least partially received within the cutouts located on the pair of laterally spaced side plates when the reel cutting unit is mounted to the pair of laterally spaced side plates.

A walk reel mower has a reel cutting unit carried by the frame, wherein the reel cutting unit comprises a laterally extending cutting reel rotatably journalled between a pair of laterally spaced inserts for rotation about a substantially horizontal rotational axis, the cutting reel having a plurality of blades. The reel cutting unit is removably mounted to a pair of laterally spaced side plates of the frame, wherein the pair of inserts are located on opposite ends of the laterally extending cutting reel such that the pair of inserts are at least partially received within the cutouts located on the pair of laterally spaced side plates when the reel cutting unit is mounted to the pair of laterally spaced side plates.