An apparatus for forming a first component making up at least a part of a housing on a trimmer head and a method of using the apparatus. The housing has a rotary axis and is configured to support at least one radially projecting cutting component. The first component has a central axis. A forming unit defines at least one cavity within which a moldable material is confined to produce at least a part of a wall on the first component that extends around the rotary axis. The forming unit is configured to allow selective controlling of a quantity of a moldable material introduced into a first discrete subvolume at a first location in the one cavity to thereby allow selective controlling of a mass of a portion of the at least part of the wall formed by the moldable material in the one cavity at the first location to facilitate dynamic balancing of the housing, within which the first component is incorporated, with respect to the rotary axis.

A trimmer head for use with either clockwise or counterclockwise trimmer heads, including the use of a bidirectionally dispensing spool. Various locations of passages straight through the trimmer head and spool are shown along with various locations of components of the ratcheting mechanism to allow for winding of the trimmer line on the trimmer head and for limiting the amount of line dispensed during bumping of the trimmer head knob on the ground. Additionally, an extended funnel into the passage can be provided to facilitate entrance of trimmer line into the funnel even when the line is not perfectly straight. Also, spokes can be used in place of the flanges of the spool to save material and cost, while still providing a guide and barrier between the line store areas.

A trimmer head for use with either clockwise or counterclockwise trimmer heads, including the use of a bidirectionally dispensing spool. Various locations of passages straight through the trimmer head and spool are shown along with various locations of components of the ratcheting mechanism to allow for winding of the trimmer line on the trimmer head and for limiting the amount of line dispensed during bumping of the trimmer head knob on the ground. Additionally, an extended funnel into the passage can be provided to facilitate entrance of trimmer line into the funnel even when the line is not perfectly straight. Also, spokes can be used in place of the flanges of the spool to save material and cost, while still providing a guide and barrier between the line store areas.

A trimmer head for use with either clockwise or counterclockwise trimmer heads, including the use of a bidirectionally dispensing spool. Various locations of passages straight through the trimmer head and spool are shown along with various locations of components of the ratcheting mechanism to allow for winding of the trimmer line on the trimmer head and for limiting the amount of line dispensed during bumping of the trimmer head knob on the ground. Additionally, an extended funnel into the passage can be provided to facilitate entrance of trimmer line into the funnel even when the line is not perfectly straight. Also, spokes can be used in place of the flanges of the spool to save material and cost, while still providing a guide and barrier between the line store areas.

The invention provides a grass trimmer and a cord delivering method for a grass trimmer, the grass trimmer comprises an extending rod, an housing, a grass trimming head, a handle, a main motor and a main switch, wherein the grass trimming head comprises a base, a cap and a spool having a first state relative static with the base, and the grass trimmer further comprises a cord delivering mechanism; the cord delivering mechanism comprises a cord delivering electronic switch independent of the main switch and a control device; and the cord delivering electronic switch operably electrically controls the control device to enable the spool to be in a second state capable of generating a rotary speed difference with the base. An operator does not need to interrupt work of the grass trimmer and can timely pay off required and the cord delivering operation is simple and convenient.

A line(F)-type trimmer head (1) is described, configured to rotate around a rotation axis (A-A) and comprising a housing (3) composed of at least one first housing portion (5) and one second housing portion (7), which can be torsionally and axially coupled to one another and which form a volume for a stock of cutting line (F). The second housing portion comprises at least one first passage (31), transverse with respect to the rotation axis of the trimmer head, with a first end and a second end configured and arranged so as to be positioned in correspondence of the two exit holes (9) for the cutting line, so that a cutting line can be inserted through one exit hole and extracted from the other exit hole, passing along the first transverse passage.

There is provided a grass cutter in which a cord can be easily replaced by a user and the length of the cord can be easily adjusted. The rotor section of the grass cutter has an upper cover, a lower cover and cord reels provided in an internal space formed by the upper cover and the lower cover. The cord reels are wound with two separate nylon cords. The length of the nylon cords drawn from the cord reels are adjusted by the cord adjustment mechanisms provided on the upper cover.

A combination blade and cord weed cutter-trimmer head apparatus that incorporates a mounting head, having a base plate, that mounts an electric or gas motor, its motor shaft extending downwardly, and through an adapter connects with generally through the cutter blade, with the shaft extending further downwardly for connecting with the string trimmer head of the device. Thus, the device can cut thicker weeds and brush through the application of its cutter blade, and can cut the shortened weeds down to an acceptable level through the usage of the string trimmer. Slip clutches may be incorporated within the device, to allow the motor shaft to continue rotating, in the event that the cutter blade encounters an unmovable obstacle, that prevents its rotation. In a further embodiment, the lines of the string trimmer may extend radially outwardly from the cutter blades, through integral channels provided therein, to provide simultaneous cutting at the same level by both the cutter blade, and the string trimmer, during usage. In a further embodiment, the string trimmer head may locate above the cutter blade both securing onto the motor shaft and held by the adapter to provide for cutting of both weeds and brush during usage.

A trimmer head includes a housing, a string reel and a control assembly. The housing is provided with passing holes communicated mutually and an assembly cavity for accommodating the string reel. The control assembly is clamped with the string reel and can control the string reel to rotate. The control assembly includes a driving component, a driven component and an elastic component. The driving component includes a pressing part, an extruding part, and a pushing part. When the pressing part is pressed, the pushing part pushes the driven component to detach from the string reel, the elastic component is squeezed, and the string reel rotates to release a wire. When the pressing part is released, the driving/driven components are reset under an action of the elastic component. A sealing ring is clamped between the housing and the extruding part.

A line trimmer includes a trimming head and a spool is contained within the trimming head. The spool is selectively connected to the trimming head such that the trimming head and the spool rotate together when the line trimmer is in an operating mode. The spool is configured to receive a length of cutting line such that an end of the cutting line extends from the head and cut vegetation as the trimming head rotates. A first electric motor is contained within the housing and operatively coupled to rotate the trimming head along with the spool when the trimmer is in the operating mode. A second electric motor is contained within the housing and operatively coupled to rotate the spool independently from the trimming head, e.g., for winding and/or unwinding of the cutting line.