209results about "Hand-held trimmers" patented technology

A lawn mower comprises an operation arm, a driven shaft rotatably supported inside the operation arm and having two opposite ends, a cutter operatively connected to one end of the driven shaft, a power source operatively connected to the other end of the driven shaft for generating a drive power to be transmitted to the cutter through the driven shaft, wherein said power source is selective from an engine and an electric motor, an arm side joint case provided on the end of the operation arm, a power source side joint case provided on a housing of the power source and detachably and selectively connected to the arm side joint case, and a centrifugal clutch incorporated in the arm side joint case and having a first member connected to the driven shaft, a second member detachably and selectively connected to the power source and a third member provided to engage the first member and the second member according to the centrifugal force applied thereto.

A casing of a hedge clipper which is a portable tool is provided with a power source housing in which an electric motor is housed and a main handle held by a worker, and blades serving as a tip tool are provided to the casing. An operation display panel is provided on the main handle, and a driving information display unit which displays a battery remaining capacity and a rotation speed of an electric motor as a plurality of pieces of driving information is provided on the operation display panel. The selection of the information to be displayed is switched by the operation of an operation switch unit provided in the operation display panel.

A grass trimmer includes a fixed cutter device secured to a housing and having one or more stationary cutter blades extended out of the housing, a movable cutter device rotatably secured to the fixed cutter device and having one or more cutter blades movable relative to the stationary cutter blade of the fixed cutter device to conduct cutting operations by an eccentric member of a rotary member. A drive shank is secured to the rotary member, and a power tool may engage with the shank, to drive the rotary member and the eccentric member relative to the movable cutter device, and to move the movable cutter device relative to the fixed cutter device in reciprocating action.

A power tool includes an inner housing (50) at least partially housed within and spaced from an outer housing (30). The inner housing supports a tool (102, 302), such as a pair of shear blades, and houses a motor (80) that drives the tool. The outer housing includes a grip (14, 18) to be grasped by a user. At least one vibration insulator (71-75) can be disposed between the inner housing and the outer housing and in a manner such that the vibration insulator(s) is(are) protected by the outer housing. An intake opening (60a, 60b) and exhaust opening (64a, 64b) can be formed in the inner housing and can be shielded by respective portions of an inner surface of the outer housing.

The invention relates to shears comprising a stationary blade (1) and a movable blade (2) which moves during the shearing movement of the shears. An operating mechanism (5) is arranged to affect a point of the pin (6) located at a distance from the movable blade (2). When the shears are being closed, a force is thus generated which also tries to pull the movable blade (2) towards and against the stationary blade (1) and to keep the blades (1, 2) in contact with each other. The operating mechanism (5) is arranged to affect the joint pin (6) through a sleeve-like part (7). The interior of the sleeve comprises two conical sections (8, 9), the narrowest point of the interior of the sleeve determining the point from which the sleeve-like part (7) affects the joint pin (6).

A gearbox includes a housing having therein a receiving chamber, a transmission gear wheel mounted in the receiving chamber for rotation driven by an external driving force, an eccentric shaft assembly mounted in the receiving chamber and coupled to the transmission gear wheel for rotation together with the transmission gear wheel and driving action of a cutter, and a lubricating blade mounted at a bottom side of the receiving chamber, rotatably connected with the eccentric shaft assembly for rotation together with the eccentric shaft assembly, and having a plurality of arched grooves for delivering the lubricating oil located at the bottom side of the receiving chamber to the transmission gear wheel and the eccentric shaft assembly by a centrifugal force generated by the rotation.

A walk-behind trenching implement has a side mounted rotary trenching tool for creating a profiled trench into the surface of the earth, which can also be used as an implement to edge landscape beds. The trenching implement is powered by an engine that delivers rotational power in an unbalanced manner to the wheel adjacent to the rotatable trenching tool. The wheel opposite to the trenching tool is can be non-powered to freely rotate as the implement is moved across the surface of the ground, or braked to unbalance power delivery through a differential. This unbalanced propulsion drive induces a skewing action into the operation of the implement that counterbalances the opposite skewing action resulting from the operation of the trenching tool to provide a more smoothly operating implement. A trenching tool having a configuration conducive to profile modification allows flexibility in the desired shape of the trench being formed.

A grass-cutting head (1) including: a housing (3); and at least one spool (5) placed in the housing and on which a cutting line (F) can be wound. The spool is accessible from the outside to enable a supply of cutting line to be wound onto it without taking said spool out of the housing. A stop is provided to hold the spool in the housing while the supply of cutting line is being wound onto the spool.

A transmission shaft assembly includes a connecting tube extended along a central axis, a transmission shaft being a rigid shaft made of metal material, which is extended along the central axis and disposed in the connecting tube, a first limiting element disposed on an end of the connecting tube and formed with a first hole allowing the transmission shaft to pass there through, a second limiting element disposed on the other end of the connecting tube and formed with a second hole allowing the transmission shaft to pass there through, and a bushing. The bushing includes a main body formed with a channel extended along the central axis and several projecting parts disposed on the periphery of the main body. The bushing is located in the connecting tube and disposed between the first limiting element and the second limiting element. The transmission shaft passes through the first hole, the channel, and the second hole successively.

In a power working machine where output power of a drive source is adjustable by a throttle lever pivotally movable between a non-operating position and an operating position, an operating handle, generally in the shape of a closed loop, is rotatably mounted on a shaft section extending from a machine body. Throttle lock lever is provided on the operating handle for disabling the pivotal movement of the throttle lever when necessary. The operating handle includes a lock mechanism for locking the handle at a desired rotational position, and an operation lever for unlocking the lock mechanism to permit rotational movement of the handle and simultaneously locking the throttle lock lever. Simultaneously with the unlocking of the lock mechanism, the operation lever locks the throttle lever in the non-operating position.

The invention relates to improvements in or relating to braking systems, in particular to an apparatus for reducing the stopping time of a moving body in a gardening machine, for example, the rotary blade of a rotary lawnmower. The present invention also relates to a gardening machine having such an apparatus, more specifically to a lawncare machine such as lawnmowers. An apparatus for reducing the stopping time of a moveable body in a gardening machine is described, the apparatus comprises a brake acting permanently upon a component of the drive mechanism of the moveable body. In particular, an apparatus is described comprising an electric motor driving a driven shaft by means of an indirect drive assembly. The apparatus comprises a brake system in which a brake element is in substantially permanent contact with a component of the indirect drive assembly. In a preferred embodiment the brake system comprises an annular brake disc and the brake element comprises a brake pad biased into contact with the brake disc. The present invention also provides a lawncare apparatus comprising the apparatus described above, in particular, a lawnmower preferably of the rotary type.

An electric working machine (1) including: a motor; a control unit configured to control rotation of the motor; a fixed part (3) provided with a handle having a grip portion (43); a movable part (4) held by the fixed part (3) and is configured to be extendible by sliding relative to the fixed part (3); and a cutting blade (155) provided to a end portion of the movable part (4) and is configured to be driven by the motor; characterized in that the electric working machine (1) further includes a detection unit which is connected to the control unit and is configured to detect whether or not the movable part (4) is positioned at a predetermined extended position relative to the fixed part (3).

A trimmer head for a trimmer having a shaft defining a rotation axis. The trimmer head comprising a housing including a main housing and a lower cover, and wherein the main housing contains a pair of opposed eyelets through which trimmer line is discharged. A spool encased within the housing, with a bump knob connected thereto, and having 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 a plurality of ramps located on an inside surface of the main housing and a second set of a plurality of ramps 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.

The invention relates to a method of developing tree seedlings, including germinating the seeds on a growing medium and air pruning the roots of the seedlings.

A blade is formed of a vertical segment. The vertical segment has a central aperture. The vertical segment further has long parallel side edges, short parallel end edges and upturned parallel ends. Each end has a leading edge and a trailing. A horizontal cutting edge is formed into each leading edge of the upturned parallel ends. A vertical cutting edge is formed into each long edge adjacent to a horizontal cutting edge.

The invention discloses a plant cutter which comprises a front handle. The front handle comprises a holding part and a connecting part. The connecting part is arranged on an operation rod and is placed between a main handle and a working head. An assembling structure is arranged between the holding part and the connecting part. The assembling structure comprises a first assembling structure and a second assembling structure, the first assembling structure is fixedly arranged on the holding part, and the second assembling structure is fixedly arranged on the connecting part and is matched with the first assembling structure in shape. Under a first state, the holding part and the connecting part are separated, under the second state, the first assembling structure and the second assembling structure are integrally connected in a matched mode, and the holding part is connected to the operation rod. The connecting part which does not affect the packaging size is arranged on the operation rod and is packaged along with a whole machine, the holding part which affects the packaging size is packaged independently, the packaging size of the whole machine and conveying cost are lowered, and after a user buys the plant cutter, the user can quickly assemble the front handle through the assembling structure quickly by himself.