Abstract: A constricting collar and method of use that provides for a means of humane end of life for a condemned individual or an individual making an end of life decision where it is legal to do so. The collar is openable and closeable to be fixed around a person's neck. The collar has a cushion at the back of the neck and a constricting member at the front. Various means can be employed to trigger the constricting member to move toward the cushion at the back of the neck, such as a screw, a screw gear, a rack and pinion gear, and an inflatable air cartridge. The method of use includes the administration of a tranquilizing agent after placement of the collar around a person's neck after which the constricting action can be activated either through a remote or a button on the collar itself or in the case of the inflatable mechanism, the application of air through a cylinder.

Abstract: A grass trimmer includes a trimming head, a driving device for driving the trimming head to rotate so as to cut vegetation and an operating device for a user to operate so as to control the driving device. The trimming head includes a spool and a line holding member, the spool is used to wind a cutting line, and the line holding member is formed with a line holding structure. The driving device includes a motor. The grass trimmer has an auto-winding mode. In the auto-winding mode, the motor drives at least one of the spool and the line holding member to make the spool and the line holding member rotate relatively so that the cutting line is wound on the spool automatically.

Abstract: A trimmer head includes a spool formed with a winding portion for winding a trimmer line and a head housing formed with an accommodating space for accommodating at least a portion of the spool. The trimmer head further includes an intermediate element for transmitting a torque between the spool and the head housing such that one of the spool and the head housing rotates with the other. The spool drives the intermediate element to rotate and the intermediate element is slidably connected to the spool in a direction along a rotation axis or parallel to the rotation axis. The spool does not move in the axial direction when the trimmer head of the grass trimmer is unwinding the trimmer line, thereby effectively avoiding the problem of the trimmer line jamming.

Abstract: A blade housing assembly for a power operated rotary knife including a split blade housing and a cam mechanism for changing a blade housing diameter between blade supporting and blade changing positions. The split blade housing includes an annular blade support section, a mounting section and a split extending through the mounting section and an inner wall of the blade support section and defining a split distance between first and second circumferential ends of the inner wall. The split includes a radial split section and an angled split section adjacent the inner wall. The mounting section includes first and second body portions on opposite sides of the split. The cam mechanism includes a cam plate bridging the first and second body portions and a cam member rotatably supported by the cam plate. The cam member is rotatable between closed and open positions to change the blade housing diameter.

Abstract: A weed trimming head assembly includes a hub that has a plurality of arms each radiating outwardly between a central coupling and an outer ring. Each of the arms has a channel integrated into the arms and the channel extends between the central coupling and the outer ring. A plurality of trimming lines is provided and each of the trimming lines is slidably insertable into the channel in a respective one of the arms. Moreover, each of the trimming lines extends outwardly from the outer ring of the hub. In this way each of the trimming lines can trim grass when the hub is rotated by the weed trimmer.

Abstract: A pruning system includes a cutting head comprising upper and lower cutting rings positioned along a bottom portion of one or more tubes. At least one of the cutting rings is adapted to rotate in a circular motion, while the other cutting ring may be adapted to remain stationary. A vacuum may be applied to suction target plant material, and the cutting head may be lowered toward the target plant material. As adjacent blades from the upper and lower cutting rings are separated in an open position, plant material may be collected in the opening defined by the adjacent blades of the cutting rings. As the blades converge, the opening may close, and plant material collected in the opening may be severed from the plant. System variables, such as blade orientation, vacuum speed, blade rotation speed, barrel size, and the cutting mechanisms, may be adjusted to accommodate different types of plant material.

Abstract: A vacuum rotary knife is fluidly connectable to a vacuum source conduit. The rotary knife includes an annular blade and a knife head. The knife head supports the blade for rotation about a rotational axis. The knife head presents a vacuum port fluidly connectable to the conduit. The vacuum port is spaced from the blade such that the knife head defines a suction pathway extending between the blade and the vacuum port.

Abstract: A hand-guided motorized working apparatus and an operating device for the apparatus are provided. The operating device has a handle shank configured to be hand-gripped, an operating element receiving region adjoining the handle shank, and an operating unit which acts on the apparatus operation and includes an operating element which is held movably on the operating element receiving region for actuation by a finger of a hand gripping the handle shank, and has a finger rest region extending along an outer side of the operating element receiving region.

Abstract: The cutting head assembly object of the present invention comprises a trimmer line feed mechanism and a trimmer line winding mechanism. A lower cover member coupled to the housing member and has a central opening to hold a ground engaging button member. The ground engaging button member is rotationally engaged to the spool. The upper section of the ground engaging button member and the internal walls of the cover ring have radially and axially extending structures which cooperate with each other to provide a ratcheting and indexing mechanisms that allows controlled rotation of the spool which is constrained from axial movement relative to the housing member by biasing the force of a compression spring which also maintains the ground engaging member in an extended position.

Abstract: 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.

Abstract: A working machine may include an operation rod; a tool disposed on a front portion of the operation rod; a prime mover configured to drive the tool; a first harness connector disposed frontward of a center of gravity of the working machine and configured to be connected to a first end of the harness; and a second harness connector disposed rearward of the center of gravity of the working machine and configured to be connected to a second end of the harness opposite to the first end. In a side view of the working machine, the center of gravity of the working machine may be positioned on a first harness connector side with respect to a plane that passes through a midpoint of a line connecting the first harness connector with the second harness connector and is perpendicular to the line.

Abstract: A grass trimming head includes a housing assembly and a spool. The housing assembly is formed with a housing cavity and an outer aperture for allowing a cutting line to be inserted from an outside of the housing assembly into the housing cavity. At least a portion of the spool is arranged inside the housing cavity, and the spool is rotatable with respect to the housing assembly about a central axis. The spool is formed with an inner aperture for allowing the cutting line to be inserted into the spool or a clamping portion configured to fix the cutting line.

Abstract: A weed trimmer apparatus is disclosed, including a head comprising a body portion defining a trimmer member passage configured to receive a trimmer member and defining an aperture configured to receive a trimmer retention member in the form of a pin into the trimmer member passage. At least one or more trimmer member retention members comprising a pin operatively connected to the head for retaining one or more trimmer members. The pin is positionable within the body portion, movable from a trimmer member retention position to a trimmer release position, such that the moveable pin clears the passage in the trimmer release position, and such that the moveable pin extends across the trimmer member passage in the trimmer member retention position. The pin retention member is configured to extend through an aperture of at least one trimmer member to retain the trimmer member during operation of the weed trimmer apparatus.

Abstract: A housing having a rotary axis and configured to support at least one radially projecting cutting component that effects cutting as the housing is turned around the rotary axis. The housing has a first housing part with a first wall and a plurality of discrete circumferentially spaced cavities in the first wall and each having a volume. The volumes of at least a first and second of the cavities respectively at first and second locations are different and strategically selected to cause a mass distribution on the housing that contributes to improved dynamic balancing of the housing as the housing is turned around the rotary axis.

Abstract: A high-efficiency cutting system for an autonomous mower provides a multiple blade tip cutting radius for a cleaner cut, and more complete mow. The system includes a spinning blade disk provided within a housing including a vertical standoff. The blade disk includes a first pair of cutting blades located between the center of the blade disk and the circumference of the blade disk, and a second pair of cutting blades located radially inward from the first pair of cutting blades. The cutting blades extend downward and away from the blade disk at an angle.

Abstract: An arbor adapter for converting a common angle grinder to a compact line trimmer is disclosed. The trimmer, as converted, is powerful, efficient, and as safe as any of the typical uses for angle grinders. The prototype line trimmer is 13? in length and may be operated with one hand if desired. Conventional line trimmers are in the 66? range, or five times the length of the present invention. The invention requires no alteration of the factory angle grinder and guard. The invention could be modified as to material composition yet still meet the original scope and claims.

Abstract: A trimmer head having at least two pivoting line holders for holding multiple folded strips of trimming line is presented wherein said pivoting line holders are retained within said housing between said housing and said cover and extend upward through apertures in said cover, said line holders being capable of movement around a vertical axis of rotation, at least three embodiments are disclosed which provide a rounded landing for supporting the inner radius of a folded strip of trimming line, the rounded geometry of the landing prevents line stress and breakage, the various embodiments include a pivot post having two parallel straight through holes with a rounded vertical wall between the through holes, a single open passageway having a center metal post, and a single open passageway having a series of at least two metal pins through the center of the passageway.

Abstract: A grass trimmer includes a trimming head, a driving device for driving the trimming head to rotate so as to cut vegetation and an operating device for a user to operate so as to control the driving device. The trimming head includes a spool and a line holding element, the spool is used to wind a trimming line, and the line holding element is formed with a line holding structure. The driving device includes a motor. The grass trimmer has an auto-winding mode. In the auto-winding mode, the motor drives at least one of the spool and the line holding element to make the spool and the line holding element rotate relatively so that the trimming line is wound on the spool automatically.

Abstract: A blade housing assembly for a power operated rotary knife including a split blade housing and a cam mechanism for changing a blade housing diameter between blade supporting and blade changing positions. The split blade housing includes an annular blade support section, a mounting section and a split extending through the mounting section and an inner wall of the blade support section and defining a split distance between first and second circumferential ends of the inner wall. The split includes a radial split section and an angled split section adjacent the inner wall. The mounting section includes first and second body portions on opposite sides of the split. The cam mechanism includes a cam plate bridging the first and second body portions and a cam member rotatably supported by the cam plate. The cam member is rotatable between closed and open positions to change the blade housing diameter.

Abstract: A trimmer head of a hand-held cutting device may include a spool onto which trimmer line is loadable and from which the trimmer line is dispensable, a housing including a first housing portion and a second housing portion operably coupled to the first housing portion to house the spool where the housing is driven rotationally about an axis by a shaft during powered operation of the device, a coupling assembly configured to selectively couple the spool to and decouple the spool from the housing during powered operation of the device based on an axial position of the coupling assembly within the housing, and a button operably coupled to the coupling assembly to alter the axial position of the coupling assembly when the button is moved out of a rest position by a bump of the button on a surface.

Abstract: A protective glider assembly for a handheld trimmer apparatus is disclosed including a glider plate operatively connected to a glider shaft for a rotary head of a handheld trimmer. A bearing acts between the glider plate and glider shaft. The protective glider is configured to rotate or to remain stationary independent of and relative to rotation of the rotary head of the handheld trimmer. The glider plate is positionable relative to the rotating head to adjust cutting height of trimmer members.

Abstract: An electric working machine and method for assembling the same that do not require specific jigs, so as to facilitate assembling work and reduce man-hours and production cost. A motor assembly is relatively inserted into a body casing, with a mounting base disposed behind a partitioning wall portion allowing a tubular fixture to project through an insertion hole toward the front of the partitioning wall portion, and a temporarily securing mechanism temporarily secures the motor assembly to retain the position of the motor assembly by automatically moving it in rotating and two orthogonal directions on a plane along the partitioning wall portion, so as to coaxially arrange the tubular fixture and insertion hole, and through-hole and screw hole of the mounting base for screwing the bolt. In such a temporarily secured state, the motor assembly is finally secured by screwing the bolt through the through-hole into the screw hole of the mounting base.

Abstract: Cutting blades are disclosed for use with a rotary trimmer head assembly with one or more swiveling blade receptacles, where the receptacle has a cylindrical body which defines a passage therethrough for a trimmer blade. The cutting blade preferably has a connecting end portion defining a blade mount aperture adapted to receive the swiveling blade receptacle. A male plug connection member is disposed within the blade mount aperture and preferably has bowed spring arms which are resiliently inwardly deformable, which are urged inwardly upon insertion into the female blade receptacle. The spring arms flex outwardly upon passage through the female receptacle. A multitool retention device is disclosed having a mount aperture end adapted to receive the receptacle and a tool retention end comprising at least one tool retention arm defining an elongated retention slot configured to slidingly receive and retain at least one tool member having a flange at one end of the tool member.

Abstract: A grass trimmer line includes a first line body having a first free end and a first non-free end and a second line body having a second free end and a second non-free end. A length of the second line body is substantially equal to a length of the first line body. The first line body has a first feature, the second line body has a second feature corresponding to the first feature, and the second feature is different from the first feature. A connecting portion is configured to connect the first non-free end of the first line body and the second non-free end of the second line body so that the first line body and the second line body are connected into the complete grass trimmer line.

Abstract: 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 reloadable spool and a strand-feed mechanism. The strand-feed mechanism includes a solenoid actuated plunger within a shaft of the cutter-spindle assembly which operates to non-contactingly actuate the plunger to feed out a length of strand. The solenoid is non-rotatably carried on the trimmer arm while the shaft of the cutter-spindle assembly is encircled by and rotated within the solenoid.

Abstract: A universal stringer head assembly including a cylindrical housing with an interior diameter with the geometry of a cone or wedge with a plurality of orifices passing from the exterior surface to the interior surface. Each orifice is sized and shaped to receive a fastener therethrough. Ideally, at least three orifices are equally spaced about the external circumference of the housing, facilitating the rotatable attachment of at least three fasteners to the rotatable shaft of an associated piece of lawn equipment, for example an edge trimmer.

Abstract: A landscape trimming tool attachment device for creating circular and uniform tree wells is made up of a curved tree collar, a substantially linear extension section, and an attachment means for attaching the attachment device to a landscape trimming tool.

Abstract: The broach or rasp holder tool with reduced rasp moment includes an angled strike plate with an optional curved or spheroidal surface and/or an angled withdrawal plate having a contact surface for receiving a generally perpendicular strike force that generally aligns with a point along a rasp for substantially eliminating a moment applied thereto while broaching the intramedullary canal in preparation for implanting a prosthetic stem during joint replacement surgery.

Abstract: A trimmer head for a trimmer having a shaft defining a rotation axis is provided. The trimmer head includes a housing including a main housing and a lower cover, wherein the main housing contains a pair of opposed eyelets through which trimmer line is discharged. A spool is encased within the housing, with a bump knob connected thereto, and has a passageway with opposed ends and extending from one side of the spool to another, the opposed ends being alignable with the eyelets to receive the line. A first set of ramps is located on an inside surface of the main housing and a second set of ramps is located within a center barrel of the spool. The two sets of ramps interact to control the direction of releasing line from the trimmer head and forcing indexing of the spool when the bump knob is bumped.

Abstract: A grass trimmer includes a cutting head for mounting a cutting member, a drive head having a output shaft for driving the cutting head to rotate, and an anti-winding member for preventing the output shaft from being wound to by grass. The drive head includes a drive device to drive the output shaft and a head housing for accommodating the drive device. The output shaft connects to the cutting head and passes through the anti-winding member and the anti-winding member is mounted to the cutting head so as to rotate with the cutting head and is disposed between the cutting head and the head housing so as to fill the space between the cutting head and the head housing.

Abstract: A single-cavity multi-runner applied to oriented arrangement extrusion molding equipment of graphene fibers includes a first extrusion cavity, the first extrusion cavity includes a first inlet and a first outlet arranged opposite to each other; a first molding cavity, the first molding cavity is arranged in an inclined manner, a second inlet is arranged at the high position end, a second outlet is arranged at the low position end of the first molding cavity, and the second inlet is connected to the first outlet; flow channels, the flow channels are formed by dividing the first molding cavity using baffle plates arranged horizontally and along the flowing direction of a heat-conducting mixture; a second molding cavity, the second molding cavity includes a third inlet and a third outlet arranged opposite to each other, the third inlet is connected to the outflow end of the flow channels.

Abstract: A power tool comprising a housing, a motor, and a circuit board residing in the housing is provided. A rectifier that receives an alternating current and converts the alternating current to a direct current, a switching arrangement having a plurality of motor switches connected electrically between the rectifier and the motor, and a capacitor connected electrically between the rectifier and the switching arrangement, are mounted on a rear portion of a planar surface of the circuit board. A switching arrangement and at least one heat sink in thermal communication therewith are mounted on a front portion of the planar surface of the circuit board.

Abstract: A rotary head for brush cutters with a lower shell on which cutting means and a ring nut are hinged, the latter being coupled to the lower shell and movable in relation to the lower shell from a first working configuration to a second blade-change working configuration, and vice versa; the rotary head having positioning means for interference fitting said ring nut in a predetermined angular position relative to said lower shell.

Abstract: A spool and a trimmer head. The trimmer head includes a housing defining a cavity and rotatable about an axis. A spool is supported in the cavity and operable to support line to be dispensed. The spool is movable along the axis relative to the housing, and the spool and the housing define cooperating conical surfaces to center the spool during movement of the spool toward and in a position relative to the housing.

Abstract: The trimmer head (1) includes a housing (3) and a spool (5) that can be housed in the housing. A pair of ring members (35A, 35B) with teeth inclined at opposite inclinations can be selectively coupled to the head, to engage the trimmer head (1) in combination with trimmer apparatuses having engine that rotates selectively in a clockwise or anticlockwise direction.

Abstract: A power tool has a clamping mechanism having an assembling mount and two clamping blocks. The assembling mount has a main body, a receiving recess defined in the main body, two first limiting troughs communicating with the receiving recess, and a through hole defined through a bottom of the receiving recess. The two clamping blocks are disposed in the receiving recess. Each one of the two clamping blocks has an abutting face corresponding to the bottom of the receiving recess in shape and facing to the bottom of the receiving recess. One of the two clamping blocks has two limiting ribs respectively inserted in the two first limiting troughs. The two limiting ribs respectively guided and blocked by the two first limiting troughs to prevent the clamping block from sliding downward along the bottom of the receiving recess.

Abstract: A grass trimmer includes a grass cutting head and a driving mechanism. The grass cutting head includes a head housing, a spool, and a clutch mechanism. The clutch mechanism is configured to implement power transmission between the head housing and the spool. The clutch mechanism includes an elastic member which is elastically deformable.

Abstract: A grass trimmer includes a trimming head, a driving device for driving the trimming head to rotate so as to cut vegetation and an operating device for a user to operate so as to control the driving device. The trimming head includes a spool and a line holding member, the spool is used to wind a cutting line, and the line holding member is formed with a line holding structure. The driving device includes a motor. The grass trimmer has an auto-winding mode. In the auto-winding mode, the motor drives at least one of the spool and the line holding member to make the spool and the line holding member rotate relatively so that the cutting line is wound on the spool automatically.

Abstract: A powered tool device may include a first handle grip coupled to a first handle bar and a second handle grip coupled to a second handle bar. A first battery may be coupled to the first handle bar, and a second battery may be coupled to the second handle bar. The two handle bars, handle grips, and their respective batteries may be separated from each other via a separation structure that may separate the two handle bars by a distance which may allow portions of the body of a user to be between the handle bars. Optionally, the separation structure may be moved between an extended position and a compacted position.

Abstract: The battery housing assembly, connected to a support shaft assembly of a string trimmer, includes a base housing member defining a chamber configured to receive a battery therein. The base housing member includes a frontal member configured to engage a front of the battery, a top member extending from the frontal member, configured to engage the top portion of the battery, and a bottom member, configured to engage a bottom portion of the battery. A first side member is configured to be removably connected to a first side of the base housing member; and a second side member configured to be removably connected to a second side of the base housing member.

Abstract: An arrangement includes an output shaft, a cutting head, at least one cutting tool arranged on the cutting head, and a hood. The cutting head is mounted on the output shaft by a screw element held in a rotationally fixed manner on the cutting head. The hood is held on the output shaft in a rotationally fixed manner, and has ribs in the inner region, and a first grip region in the outer region.

Abstract: A power operated rotary knife including an annular rotary knife blade supported for rotation in a blade housing. The rotary knife blade including a body and a blade section extending from the body. The body includes an outer wall including an arcuate surface having an upper region extending from a first upper end portion to a second intermediate portion and a lower region extending from the second intermediate portion to a third lower end portion. A plurality of gear teeth extend downwardly from the upper end of the body, each of the plurality of gear teeth including an outer peripheral face forming a portion of the upper region of the arcuate surface of the outer wall. The body outer wall includes a bearing surface having a lower bearing face in the lower region of the arcuate surface and an upper bearing face in the upper region of the arcuate surface.

Abstract: A manually guided implement possesses a guide tube, wherein a first mass body is disposed on a first end of the guide tube, and a second mass body is disposed on a second end of the guide tube. One of the mass bodies has a housing, and the other of the mass bodies has a tool driven by a drive motor. A power transmission mechanism for driving the tool between the first and second ends of the guide tube is guided in the interior of the guide tube. A first antivibration element is disposed between the first end of the guide tube and the first mass body. The guide tube in the direction of the longitudinal central axis thereof includes a first rigid sub-portion and a second rigid sub-portion that are connected to one another at an abutment location by at least one second antivibration element.

Abstract: Disclosed is a four-line nylon cutter assembly for a mower, including: an upper case having an insert groove at a central portion thereof; an elastic body in which one surface portion is in close contact with an inner surface of the central portion of the upper case; a spool having a surface on which a nylon cutter is wound and one surface which is in close contact with the other surface portion of the elastic body by pressing; an operating wheel of which one surface portion is coupled to the other surface portion of the spool; and a lower case in which a mounting groove into which the other side portion of the operating wheel is inserted is formed at the center portion and an edge portion is coupled to an edge portion of the upper case.

Abstract: A trimmer head for use with a handheld lawn maintenance tool is shaped in a hub-and-spoke manner, wherein the trimmer head includes a housing formed of a hub, a circular rim, and a plurality of spokes extending therebetween. A spool is positioned within the hub, and a pair of pieces of trimmer line are inserted into opposing sides of the circular rim through the spokes for winding onto the spool. The trimmer line extends outwardly from the housing at a location spaced away from the hub.

Abstract: The invention provides a grass trimmer and a cord delivering method for a grass trimmer, the grass trimmer includes an extending rod, an housing, a grass trimming head, a handle, a main motor and a main switch, wherein the grass trimming head includes a base, a cap and a spool having a first state relative static with the base, and the grass trimmer further includes a cord delivering mechanism; the cord delivering mechanism includes 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.

Abstract: A blade housing assembly for a power operated rotary knife including a split blade housing and a cam mechanism for changing a blade housing diameter between blade supporting and blade changing positions. The split blade housing includes an annular blade support section, a mounting section and a split extending through the mounting section and an inner wall of the blade support section and defining a split distance between first and second circumferential ends of the inner wall. The split includes a radial split section and an angled split section adjacent the inner wall. The mounting section includes first and second body portions on opposite sides of the split. The cam mechanism includes a cam plate bridging the first and second body portions and a cam member rotatably supported by the cam plate. The cam member is rotatable between closed and open positions to change the blade housing diameter.

Abstract: A trimmer head arranged to be driven to rotate a trimmer line, where the trimmer head includes a housing and an inner body connected to a trimmer line spool. The inner body is arranged to be movable relative the housing so that a trimmer line spooled around the trimmer line spool is released and pulled out by a centrifugal force caused by the rotation of the trimmer head, thereby allowing feed of the trimmer line. The trimmer further includes drive means for driving the trimmer head to rotate, and the trimmer is arranged to cause a relative movement of the inner body relative the housing by changing the rotation speed of the trimmer head.

Abstract: A rotary knife includes a rotatable annular blade. The blade includes a blade wall presenting an annular inner surface terminating at a cutting edge. The annular inner surface includes a first section and a second section, with the first section extending from the cutting edge and the second section being located further from the cutting edge than the first section. The first and second sections define first and second angles, respectively, relative to an imaginary plane transverse to the axis about which blade rotates. The second angle is greater than the first angle.

Abstract: A hand-held cutting device (10) including an elongated member (45), a trimmer head (25), and a power unit operably coupled to the trimmer head (25) to selectively cause rotation of the trimmer head (25). The trimmer head (25) includes a line holding assembly (110, 310) to hold and selectively release trimmer line (70), and a housing to house the line holding assembly (110, 310), wherein the line holding assembly (110, 310) includes a core (140, 340), a line-release knob (160, 350), and a spool (130) configured to hold the trimmer line (70). The knob (160, 350) is axially movable with respect to the core (140, 340) between an extended first position and a retracted second position, the knob (160, 350) extending outwardly from the housing and being non-rotatably fixed to the core (140, 340) when the knob (160, 350) is in the first position.