Method and apparatus for a blade lock for use with a lawnmower. The blade lock includes an adjustable intermediate shaft having a hook-like component on one end for holding the blade of the lawnmower and a clamp-like member on the opposite end for attachment to the deck of the lawnmower. The shaft portion includes a plurality of fasteners which allow the shaft to be adjustable in length.

A mower blade device includes an elongated central frame having a top surface, a bottom surface, a first end and a second end. A spindle bolt hole is positioned along the center of the frame for connecting the frame to a lawn mower. A pair of cutting attachments are connected onto the first and second ends of the frame. Each of the cutting attachments including a leading edge having a sharpened cutting surface. The first and second cutting attachments can include identical shaped and sized cutting surfaces or dissimilar shaped and sized cutting surfaces. A cleaning brush attachment includes an elongated bracket and an n-shaped frame having a plurality of bristles extending outward therefrom. The bracket is removably connected to the bottom end of the central frame to permit the bristles to clean the blade housing of a lawn mower to which the device is connected.

A lawn mower may include a blade housing configured to house at least a first blade and a second blade, a shaft disposed to rotate within the blade housing, a powerhead configured to selectively turn the shaft responsive to application of power from a power source, and a blade coupler configured to selectively couple the first blade and/or the second blade to the shaft to produce different cutting performance conditions based on which of the first blade and/or the second blade is operably coupled to the shaft.

The combination of: a cutting head having a spool on which at least one cutting element is located and configured to be driven around an operating axis by a rotary drive to which the cutting head is coupled; and a coupling system with a core and a first adaptor assembly releasably joinable to each other and the spool. The core is keyed directly to the spool. The first adaptor assembly extends from the core and defines a driven component to engage the rotary drive. A part of the core that engages the spool to cause the core to be keyed directly to the spool is made from metal.

A lawn mower includes a blade assembly configured to perform a cutting function, a deck formed with an accommodating space for accommodating at least part of the blade assembly and a power mechanism configured to drive the blade assembly to rotate about a rotation axis. The blade assembly includes a cutting blade and a chopping device. The cutting blade is configured to be driven by the power mechanism to rotate about the rotation axis, and the cutting blade includes a cutting edge. The chopping device includes a chopping body, a plurality of chopping teeth, and a plurality of branching ports provided between two adjacent ones of the plurality of chopping teeth. The chopping body is configured to be driven by the power mechanism to rotate and the chopping teeth extend upward or downward from the chopping body.

A quick change rotary mower blade system includes a spindle having a vertical axis of rotation extending through a mower deck, and a ring shaped metal spring between the spindle and a retainer. The retainer may be turned less than 90 degrees on the vertical axis of rotation to compress the ring shaped metal spring sufficiently to clamp the mower blade. A plurality of detents hold the retainer in the position where the retainer compresses ring shaped metal spring, and release the retainer by translating the retainer downwardly along the vertical axis of rotation.

An assembly for protecting components of an electric motor on a lawn mower deck includes a shaft connected at opposite ends to the motor rotor and a blade adapter. The blade adapter is interconnected to a cutting blade. A blade mounting gap is defined between a shoulder of the blade adapter and a head of a fastener that secures the blade to the shaft. A biasing member is captured within the blade mounting gap and frictionally couples the blade and the shaft for rotation together. The blade slips with respect to the shaft in response to the blade encountering a force that overcomes the blade coupling friction.