A trimmer height adjustment mechanism (103) having a forward guard (105a); a forward spacer (112b); and an arm (109). Such trimmer height adjustment mechanism allows a string trimmer user to: (a) achieve a uniform, user-selected cutting height for groundcover; and (b) readily engage/disengage the height adjustment mechanism so that the user can change between a uniform height setting (e.g., while cutting even terrain) and an ordinary string trimmer operation (i.e., when a user is not concerned about the height of the groundcover being cut or wishes to cut as short a height as possible, e.g., while cutting grass around the base of a tree).

System for hedge pruning and method for making and using the same. An exemplary system for hedge pruning includes a mounting assembly for connecting to a mobile platform, the mounting assembly defining a pivot point region thereon, a cutting arm rotatably coupled to the mounting assembly at the pivot point region. And a blade assembly connected to an end region of the cutting arm such that the blade assembly prunes a hedge along an arc defined based upon rotation of the cutting arm about the pivot point region. Advantageously, the system provides an ability to discriminate selected plants in a hedge to improve grove health and exploit alternate bearing nature of certain groves, resulting in a more consistent production each year. Differentiated treatment can be provided within a row of the plants while pruning the hedges in an automated manner that is more efficient than manual pruning.

System for hedge pruning and method for making and using the same. An exemplary system for hedge pruning includes a mounting assembly for connecting to a mobile platform, the mounting assembly defining a pivot point region thereon, a cutting arm rotatably coupled to the mounting assembly at the pivot point region. And a blade assembly connected to an end region of the cutting arm such that the blade assembly prunes a hedge along an arc defined based upon rotation of the cutting arm about the pivot point region. Advantageously, the system provides an ability to discriminate selected plants in a hedge to improve grove health and exploit alternate bearing nature of certain groves, resulting in a more consistent production each year. Differentiated treatment can be provided within a row of the plants while pruning the hedges in an automated manner that is more efficient than manual pruning.

System for hedge pruning and method for making and using the same. An exemplary system for hedge pruning includes a mounting assembly for connecting to a mobile platform, the mounting assembly defining a pivot point region thereon, a cutting arm rotatably coupled to the mounting assembly at the pivot point region. And a blade assembly connected to an end region of the cutting arm such that the blade assembly prunes a hedge along an arc defined based upon rotation of the cutting arm about the pivot point region. Advantageously, the system provides an ability to discriminate selected plants in a hedge to improve grove health and exploit alternate bearing nature of certain groves, resulting in a more consistent production each year. Differentiated treatment can be provided within a row of the plants while pruning the hedges in an automated manner that is more efficient than manual pruning.

The invention relates to an automatic walking garden trimmer which includes a power locomotive and a trimming device. The power locomotive is rotatably connected with a turntable support whose horizontal rotation is driven by a power device. The turntable support is hinged with a lower support arm and a base cylinder which drives the lower support arm to swing. The end of the lower support arm is hinged with at least two outstretched arms and an extension cylinder used to drive the outstretched arms to swing and adjust outstretching distance. The connecting seat is connected to a sphere. Two sets of trimming devices are arranged on the side of the sphere. The trimming device includes a spiral device and a trimming ring. The spiral device includes a spiral bracket and a sleeve arranged on the spiral bracket. The rotating blade of the trimming device of the present invention can be replaced. The operator can select a suitable blade according to the shape and size of the trimmed shoots, and operate the device to make the device have a wider use range with practicality. In the case of a damaged blade, a new blade can be replaced, saving maintenance time and enhancing work efficiency.

Dual arm mechanical pruning apparatuses for simultaneously hedging and/or skirting trees in adjacent rows typically comprising: a mast assembly; a lift carriage assembly; two front arm assemblies, each front arm assembly comprising one or more saw blades; two lower arm assemblies, each lower arm assembly comprising one or more saw blades; two swing arms, each swing arm rotatably attached to the lift carriage, one of the two front arm assemblies and one of the two lower arm assemblies, where the two swing arms rotate, thereby extending and retracting the two front arm assemblies and the two lower arm assemblies relative to the lift carriage assembly, and where the two front arm assemblies hedge, and the two lower arm assemblies hedge or skirt trees. In some embodiments the dual arm mechanical pruning apparatus also comprises a vehicle mounting assembly.

Mobile hedge trimmer apparatus (1000, 2000, 3000) comprising a first portion (100) acting as a mobile base adapted to advance along a path on the ground and comprising a plate (150) and at least two wheels, preferably two pairs of wheels (104a, 104b), and a second portion (200) comprising a pillar (250) adapted to tilt on two axes (A and B) perpendicular to each other; the pillar (250) comprises a first cutting blade (210) adapted to slide along the pillar (250) and a second cutting blade (220) integral with the pillar (250); a control unit (111) is adapted to adjust the inclination of the pillar (250) on the axes (A and B) and/or the position of the first cutting blade (210) along the pillar (250), the control unit (111) receiving information from sensors which comprise at least one tool for measuring an inclination and at least one movement sensor or advancement detector.

A bush pruning apparatus adapted for use in combination with a tractor or similar vehicle, wherein the apparatus is mounted to the tractor by a frame that allows the position of the cutting blade relative to the bush be pruned to be freely independent of the position or tilt of the tractor, such that changes in elevation or ground surface encountered by the tractor are not transmitted to the cutting blade to adversely affect the height of the cutting blade.