A trimmer attachment for use with a lawn mower includes a deck mounting plate configured for attachment to the lawn mower, one or more mounting tabs extending up from the deck mounting plate, a curved pivoting arm rotatably coupled to the one or more mounting tabs, a pivoting motor for rotating the pivoting arm, and a trimmer head coupled to the pivoting arm. Rotation of the pivoting arm by the pivoting motor causes the trimmer head to rotate between a stowed position and an engaged position.

A weed whacker attaches to the front of a riding lawn mower. The week whacker is attached to the riding lawn mower through a pivoting linkage, and is supported on castors which may be adjustable in height. The weed whacker may thereby traverse uneven terrain which differs from the terrain traversed by the riding lawn mower, continuing to provide an even cut over the terrain. The weed whacker draws its power from the riding lawn mower. The weed whacker may be shifted between the right and left sides of the riding lawn mower. The weed whacker may be controlled by the driver of the riding lawn mower, including unwinding additional cutting wire in response to a control signal from a controller used by the driver of the riding lawn mower.

A weed whacker attaches to the front of a riding lawn mower. The week whacker is attached to the riding lawn mower through a pivoting linkage, and is supported on castors which may be adjustable in height. The weed whacker may thereby traverse uneven terrain which differs from the terrain traversed by the riding lawn mower, continuing to provide an even cut over the terrain. The weed whacker draws its power from the riding lawn mower. The weed whacker may be shifted between the right and left sides of the riding lawn mower. The weed whacker may be controlled by the driver of the riding lawn mower, including unwinding additional cutting wire in response to a control signal from a controller used by the driver of the riding lawn mower.

One apparatus includes a processor and a radio transceiver that receives a set of reference signals transmitted from transmission point. The processor selects a subset of beams from a plurality of orthogonal beams based on the received set of reference signals and computes sets of amplitude and phase parameters for one or more channel compression matrices. In some embodiments, each channel compression matrix corresponds to one transmission layer of a multiple-layer transmission and each channel compression matrix is comprised of one or more column vectors. The processor controls the radio transceiver to send indications of the sets of amplitude and phase parameters.

A mower and an attachment device or mount having a frame attachment clamp to removeably affix to the wheel support frame, a pivotable linkage arrangement to position a string trimmer proximate either front wheel of the lawnmower, and a grade wheel to maintain a designated height of string trimmer above grade. The attachment device or mount may enable the operator to attach the frame attachment clamp to either front wheel enabling the operator to look ahead and anticipate where the lawnmower needs to be driven and simultaneously to position the string trimmer for trimming and edging operation around landscapes and borders on either the left or right side of the lawnmower.

A mower and an attachment device or mount having a frame attachment clamp to removeably affix to the wheel support frame, a pivotable linkage arrangement to position a string trimmer proximate either front wheel of the lawnmower, and a grade wheel to maintain a designated height of string trimmer above grade. The attachment device or mount may enable the operator to attach the frame attachment clamp to either front wheel enabling the operator to look ahead and anticipate where the lawnmower needs to be driven and simultaneously to position the string trimmer for trimming and edging operation around landscapes and borders on either the left or right side of the lawnmower.

An outdoor power unit, such as a mower or snow thrower, having a supplemental battery charging station mounted thereon is provided. The outdoor power unit utilizes a flywheel/alternator arrangement to output a selected voltage. The voltage is directed to the supplement battery charging station. The supplemental batteries are thereby charged at the charging station as the outdoor power unit is driven forward or in another direction. The outdoor power unit also includes a rack (which may be in the form of a hook) to carry a battery powered supplemental lawn maintenance tool, such as a weed trimmer, hedger, edger, or leaf blower, amongst others.

A mower having a supplemental battery charging station mounted thereon is provided. The mower utilizes a flywheel/alternator arrangement to output a selected voltage. The voltage is directed to the supplement battery charging station. The supplemental batteries are thereby charged at the charging station as the mower is driven forward or in another direction. The lawn mower also includes a rack (which may be in the form of a hook) to carry a battery powered supplemental lawn maintenance tool, such as a weed trimmer, hedger, edger, or leaf blower, amongst others.

A weed trimmer mount assembly includes a mount that is attachable to a mounting location of a riding lawn mower. An arm is pivotally attached to the mount thereby facilitating the arm to be accessible to a rider of the riding lawn mower. The arm is positionable between a deployed position and a stored position. A weed trimmer is coupled to the arm and the weed trimmer is positioned adjacent to the ground when the lever is positioned in the deployed position thereby facilitating the weed trimmer to be oriented for trimming weeds on the ground. The weed trimmer is lifted from the ground when the lever is positioned in the stored position thereby facilitating the riding lawn mower to be operated in a normal manner. A speed control is mounted to the riding lawn mower for adjusting an operational speed of the weed trimmer.

A network of modular, multitier pool mobile units, that wander around and under water of a swimming pool. The pool mobile units monitor for safety, emergency and accident related events and undertake appropriate actions to provide care and protection for swimmers, family members and bystanders. They scrub and clean the swimming pool bottom and wall surfaces and emit chemical agents to sanitize the swimming pool water. A central server provides safety monitoring, help for drowning swimmers, and emergency and accident supports.