A mower blade assembly attaches to a rotatable spindle and includes a mounting plate which defines a first pin aperture. The mounting plate and a retaining plate are attached to the rotatable spindle. The retaining plate defines a second pin aperture. A movable pin plate comprises a pin. A blade is selectively attachable to the mounting plate. The blade defines a retaining plate aperture and a third pin aperture. A biasing member urges the movable pin plate from a disengaged position to an engaged position. The pin is engageable with the pin apertures for mounting and retaining the cutting blade to the mounting plate. The blade is attached by moving the blade over the retaining plate aperture, urging the movable pin plate to the disengaged position, rotating the blade, and releasing the movable pin plate. Another embodiment includes a force finger.

A mower blade assembly attaches to a rotatable spindle and includes a mounting plate which defines a first pin aperture. The mounting plate and a retaining plate are attached to the rotatable spindle. The retaining plate defines a second pin aperture. A movable pin plate comprises a pin. A blade is selectively attachable to the mounting plate. The blade defines a retaining plate aperture and a third pin aperture. A biasing member urges the movable pin plate from a disengaged position to an engaged position. The pin is engageable with the pin apertures for mounting and retaining the cutting blade to the mounting plate. The blade is attached by moving the blade over the retaining plate aperture, urging the movable pin plate to the disengaged position, rotating the blade, and releasing the movable pin plate. Another embodiment includes a force finger.

A radio-controlled vehicle comprising a supporting structure, an engine unit, a kinetic unit and a remote control for operating the vehicle remotely; the radio-controlled vehicle having a cab, which is configured to house, in use, a person; wherein the cab and the supporting structure are mutually movable, so as to be able to selectively arrange the cab in a desired position with respect to the supporting structure.

A strand trimmer and method of use thereof. The strand trimmer includes a pair of pivotable arms each having a motor, a follower wheel, and a cutter-spindle assembly disposed thereon. The arms are biased toward one another and are guided by the follower wheels to pivot around obstacles passing between the arms. The motor rotates the cutter-spindle assembly to move cutting strands extending therefrom through a cutting path with sufficient rotational velocity to cut vegetation. The cutter-spindle assembly includes a spool and a strand-feed mechanism. The spool is oriented to rotate about a horizontal axis. The strand-feed mechanism includes a solenoid actuated plunger within a shaft of the cutter-spindle assembly. The plunger engages the spool to control rotation of the spool and thereby feeding out of incremental lengths of the strand.

A strand trimmer and method of use thereof. The strand trimmer includes a pair of pivotable arms each having a motor, a follower wheel, and a cutter-spindle assembly disposed thereon. The arms are biased toward one another and are guided by the follower wheels to pivot around obstacles passing between the arms. The motor rotates the cutter-spindle assembly to move cutting strands extending therefrom through a cutting path with sufficient rotational velocity to cut vegetation. The cutter-spindle assembly includes a spool and a strand-feed mechanism. The spool is oriented to rotate about a horizontal axis. The strand-feed mechanism includes a solenoid actuated plunger within a shaft of the cutter-spindle assembly. The plunger engages the spool to control rotation of the spool and thereby feeding out of incremental lengths of the strand.

A system for creating three-dimensional grass graphics can include a means for cutting grass with an adjustable cutting height, a chlorophyll-based agent for coloring grass, and at least one stencil. The chlorophyll-based agent can be non-detrimental to a health of the grass and can be available in multiple shades. The stencil can be securable to the grass and can define a graphic to be painted on the grass using the chlorophyll-based agent. The means for cutting the grass can be able to pass over and around the stencil without damaging the stencil. Application of different shades of the chlorophyll-based agent to varying heights of grass can produce a three-dimensional effect for the graphic when viewed.

A system for creating three-dimensional grass graphics can include a means for cutting grass with an adjustable cutting height, a chlorophyll-based agent for coloring grass, and at least one stencil. The chlorophyll-based agent can be non-detrimental to a health of the grass and can be available in multiple shades. The stencil can be securable to the grass and can define a graphic to be painted on the grass using the chlorophyll-based agent. The means for cutting the grass can be able to pass over and around the stencil without damaging the stencil. Application of different shades of the chlorophyll-based agent to varying heights of grass can produce a three-dimensional effect for the graphic when viewed.

A plant harvesting system is provided for use with a vertical hydroponic tower, the hydroponic tower containing a plurality of vertically aligned plants. The harvesting system includes a payload transport system and a harvester. The payload transport system, which is configured to be positioned at a location adjacent to the hydroponic tower, includes a base and a lift tower, the lift tower including a motorized lift system configured to move the harvester upward and downward. In addition to cutting plant stalks while moving upwards along the face of the hydroponic tower, the harvester also groups and collects the plant leafs.

A plant harvesting system is provided for use with a vertical hydroponic tower, the hydroponic tower containing a plurality of vertically aligned plants. The harvesting system includes a payload transport system and a harvester. The payload transport system, which is configured to be positioned at a location adjacent to the hydroponic tower, includes a base and a lift tower, the lift tower including a motorized lift system configured to move the harvester upward and downward. In addition to cutting plant stalks while moving upwards along the face of the hydroponic tower, the harvester also groups and collects the plant leafs.

The permanent lawn mower, or inground lawn mower, is designed to be an alternative to conventional mobile mowing. Its focus is small grassy areas that are dangerous or impractical to mow by other means. In a first embodiment, the system includes three primary components: a drive unit that supplies rotational motion; a cable that carries rotational motion away from the drive unit, and one or more cutting heads that convert the rotational motion into a cutting action. In a second embodiment, the drive unit is combined with the cutting head, avoiding the need for a cable to carry rotational motion.