Abstract: Frame systems include a plurality of connected frame units. Each frame unit includes a first end plate connected to a first end of a frame element a second end plate connected to a second end of the frame element. The plurality of frame units is movable between a first state and a second state, wherein in the first state, the plurality of frame units has a first width along a width axis of the plurality of frame units, and a first frame unit and a second frame unit of the plurality overlap by a first overlap amount along the width axis. In the second state, the plurality of frame units has a second width along the width axis and the first frame unit and the second frame unit overlap by a second overlap amount along the width axis.

Abstract: Methods of using a mower are provided. The methods include providing a mower having a plurality of cutting heads, a first driven wheel supported at a first end of the plurality of cutting heads, and a second driven wheel supported at a second end of the length of the plurality of cutting heads. In some methods, each cutting head of the plurality of cutting heads is at least one of pivotably connected or translatably connected to at least one other cutting head of the plurality of cutting heads. Some methods include driving the first driven wheel such that the mower pivots about the second driven wheel.

Abstract: A system includes a plurality of connected frame units. Each frame unit includes a first end plate connected to a first end of a frame element, and a second end plate connected to a second end of the frame element. The plurality of frame units is movable between a first state and a second state. In the first state, the plurality of frame units has a first width along a width axis of the plurality of frame units, and a first frame unit and a second frame unit of the plurality overlap by a first overlap amount along the width axis. In the second state, the plurality of frame units has a second width along the width axis and the first frame unit and the second frame unit overlap by a second overlap amount along the width axis.

Abstract: A mower includes a plurality of cutting heads, each cutting head having a minor cutting width, the plurality of cutting heads connected by a plurality of connectors in an array having a variable major cutting width. The mower also includes a steering system coupled with a first driven wheel and supported by one cutting head, and a second driven wheel supported by one other cutting head. The steering system is capable of steering the first driven wheel independently from the second driven wheel.

Abstract: A mower includes a plurality of cutting heads, each cutting head having a minor cutting width, the plurality of cutting heads connected by a plurality of connectors in an array having a variable major cutting width. The mower also includes a steering system coupled with a first driven wheel and supported by one cutting head, and a second driven wheel supported by one other cutting head. The steering system is capable of steering the first driven wheel independently from the second driven wheel.

Abstract: A mower includes a plurality of cutting heads, each cutting head having a minor cutting width, the plurality of cutting heads connected by a plurality of connectors in an array having a variable major cutting width. The mower also includes a steering system coupled with a first driven wheel and supported by one cutting head, and a second driven wheel supported by one other cutting head. The steering system is capable of steering the first driven wheel independently from the second driven wheel.

Abstract: A mower includes a plurality of cutting heads, each cutting head having a minor cutting width, the plurality of cutting heads connected by a plurality of connectors in an array having a variable major cutting width. The mower also includes a steering system coupled with a first driven wheel and supported by one cutting head, and a second driven wheel supported by one other cutting head. The steering system is capable of steering the first driven wheel independently from the second driven wheel.

Abstract: A mower includes a plurality of cutting heads, each cutting head having a minor cutting width, the plurality of cutting heads connected by a plurality of connectors in an array having a variable major cutting width. The mower also includes a steering system coupled with a first driven wheel and supported by one cutting head, and a second driven wheel supported by one other cutting head. The steering system is capable of steering the first driven wheel independently from the second driven wheel.

Abstract: A mower includes a plurality of cutting heads, each cutting head having a minor cutting width, the plurality of cutting heads connected by a plurality of connectors in an array having a variable major cutting width. The mower also includes a steering system coupled with a first driven wheel and supported by one cutting head, and a second driven wheel supported by one other cutting head. The steering system is capable of steering the first driven wheel independently from the second driven wheel.

Abstract: A bicycle frame, comprising at least two members, capable of improving upon at least several aspects of existing bicycle frames, including cost, weight, and reliability, while accommodating a wide range of rear tire widths. Various embodiments accomplish these improvements through the employment of structurally efficient cross sections, few supporting members, a cantilever rear wheel support, and few locations where members are adjoined and susceptible to certain failure modes.