Abstract: A portable tool including a frame, a working element on the frame and a power unit for operating the working element. A switch on the frame switches between a first state, e.g., stop operation, and a second state, e.g., running operation. An actuator on the frame is repositionable relative to the frame to selectively change the switch from its first state into its second state and in a first path to change the switch from its first state into its second state. The actuator is mounted for movement relative to the frame in a second path that is different than the first path to change the switch from its first state into its second state.

Abstract: Branch shears (1) having two blades (11, 12) that are movable in relation to each other, of which one blade (11) is rigidly connected with a housing (2) and the other blade (12) can be moved by an electric motor (5) via a threaded spindle (8), a threaded nut (21) arranged on the threaded spindle and a rod assembly connected to the threaded nut. A control switch (41) having two reversing switches (42, 43) connected to the circuit of the electric motor (5) is provided. In addition, a control link (51) is attached to the spindle nut (21), onto which the operating cams (53, 54, 55) interacting with the reversing switches (42, 43) are formed. With the aid of the control switch (41), it is possible to stop, continue or reverse the movements of the pivotable blade (12) at any time in a simple manner, thus the movements of this blade can be controlled as desired.

Abstract: A hair-cutting apparatus (1) is provided having a toothed cutting device (5) comprising a stationary first toothed cutter (6) with a first cutter-tooth row (7) and a second toothed cutter (9) with a second cutter-tooth row (10), which second toothed cutter is drivable so as to reciprocate about a pivotal axis (8), the first cutter-tooth row (7) of the first toothed cutter (6) extends linearly in a first row direction (23) and the second cutter-tooth row (10) of the second toothed cutter (9) comprises two row segments (24, 25) which in a central position of the second toothed cutter (9), starting from a center point (26), diverge with respect to the linear direction of the first cutter-tooth row (7).

Abstract: A hedge trimmer includes a motor and a cutting mechanism driven by the motor. A clutch mechanism is interposed between the motor and the cutting mechanism. A first and a second handle are provided to be grasped with both hands of an operator. A clutch control mechanism is provided for connecting and disconnecting the clutch mechanism. The clutch control mechanism includes a first and a second switch lever which are associated with the first and second handles, respectively, and which are operable by the operator between a first and a second position, respectively. A pin is operably connected to the first and second switch levers and is movable between a connecting position for connecting the clutch mechanism and a disconnecting position for disconnecting the clutch mechanism. Biasing members serve to hold the pin at the disconnecting position when at least one of the first and second switch levers are at the first position.

Abstract: The invention is directed to a cutter blade support for a pair of knives of a hedge trimmer. The cutter blade support includes first and second bars conjointly defining a space therebetween. First and second cutter blades are arranged in the space and define respective sets of apertures formed therein. The first bar has openings formed therein and a plurality of threaded bolts are held in the second bar. The threaded bolts extend through the respective sets of apertures and have respective end portions extending through the openings in the first bar. Attachment nuts are disposed on the first bar and threadably engage corresponding ones of the end portions. The threaded bolts are pressed into the second bar so as to be tightly held therein and so as to be nonrotatable with respect thereto.

Abstract: A manual tool is driven by an electric motor, and has a primary handle and a secondary handle arranged at a distance from each other. A switch is situated in the manual tool and can only be switched on by the simultaneous actuation of two contact mechanisms, one arranged in each handle, the motor being switched off when grip on either handle is released. The tool further comprises an initiating device in the form of a safety interlock mechanism which is adapted to prevent actuation of the switch, unless the safety interlock mechanism is actuated prior to actuation of the contact mechanism arranged in the primary handle. The switching mechanism is particularly suitable for a hedge clipper or chainsaw, especially a cordless tool.

Abstract: The present invent provides an improvement in the handling and operation of portable working machines, particularly in a loop front handle and an operation lever adjacent to the handle for easy operation. An operation lever mechanism for a handle according to the present invention includes: a rotatably supported body; a swingable operation lever pivotally supported by the rotatably supported body; and an operating portion movable in a direction along an axis X--X of the rotatably supported body, the operating portion connected to a swinging end of the operation lever, wherein the rotation axis X--X of the rotatably supported body is situated so as to encompass a virtual center X of a loop handle or a point adjacent to the center X, and the grip portions of second swinging end of the swingable operation lever rotate and move along an arc of the loop handle.

Abstract: A motor-driven hedge shear has a housing, a pair of hedge shear cutters extending in a longitudinal direction outwardly of the housing, means for reciprocatingly driving the hedge shear cutters in opposite directions and including a motor shaft, a coulisse transmission provided between the means and the hedge shear cutters, cutter holders provided for supporting the hedge shear cutters and having coulisse ears, the coulisse transmission including toothed gears provided with crank pins engaging in the coulisse ears, a central shaft supporting the toothed gears and having ends rotatably supported in the housing. Two of the toothed gears of the coulisse transmission are arranged on the central shaft so as to be axially spaced from one another, and have facing sides provided with crank pins formed as eccentrically arranged circular discs.

Abstract: A portable electric working machine of the present invention includes a motor case portion housing an electric motor, a working portion driven by the electric motor, a handle connected to the motor case portion or the working portion and a power source switch disposed within a grip portion of the handle. Electric power is supplied to the electric motor through the power source switch. A spark-preventing capacitor accommodated within the motor case portion is interposed between a pair of terminals of the electric motor. The portable electric working machine of the present invention does not require a large-sized grip portion of a handle, and can prevent a locking of contacts of a power source switch due to contact transition by preventing sparking between the contacts so that a small-sized microswitch can be used.

Abstract: A power working machine in which maintenance work is improved by having the heads of case fastening and motor fastening screws covered by the gasket provided between the mount base and the transmission cover. This prevents dirt load grease from clogging the heads of such screws. The transmission cover is also provided with through holes for the motor fastening screws and the case fastening screws, respectively.

Abstract: A clipping catcher for connection to a powered hedge trimmer to catch trimmings severed from a plant, such as a hedge or bush, by the hedge trimmer. The catcher includes a plurality of catcher panels that are hingedly connected along respective opposed longitudinal edges of the adjacent panels. The catcher panels are held in a predetermined angular relationship relative to each other by end clips that engage end edges of respective adjacent catcher panels to define a catcher that, when viewed in cross-section, has a C shape. The end clips are pivotable about hinge pins and are movable axially relative to the catcher panels to permit withdrawal of the end clips from the end edges of the catcher panels for reorientation of the catcher panel members relative to each other to enable the catcher to be utilized in each of two opposite directions of movement of the hedge trimmer, and without requiring removal of the catcher from the hedge trimmer cutter assembly.

Abstract: A hedge trimmer includes a motor and a cutting mechanism driven by the motor. A clutch mechanism is interposed between the motor and the cutting mechanism. A first and a second handle are provided to be grasped with both hands of an operator. A clutch control mechanism is provided for connecting and disconnecting the clutch mechanism. The clutch control mechanism includes a first and a second switch lever which are associated with the first and second handles, respectively, and which are operable by the operator between a first and a second position, respectively. A pin is operably connected to the first and second switch levers and is movable between a connecting position for connecting the clutch mechanism and a disconnecting position for disconnecting the clutch mechanism. Biasing members serve to hold the pin at the disconnecting position when at least one of the first and second switch levers are at the first position.

Abstract: A transparent plate mounted on a sickle bar, adjacent the inner end thereof. The plate is located in register with the handle that is positioned on the sickle bar, to cover the cutting teeth more fully, at the location where it is held.

Abstract: A precision hair clipper for cutting the hair to a predetermined length, energized solely by a vacuum source. A flow chamber having an inlet and an outlet which connected to an inlet of a turbine. The stator of the turbine is the handle of the hair clipper. The outlet of the turbine is connected to a vacuum source through a hose. In the inlet opening of the flow chamber the sucked in hair is cut by a wobbling-reciprocating narrow, double edged blade under a stationary blade opening to provide a pair of scissors action. The cutting mechanism is driven by the turbine through a speed reduction transmission. The length of hair after a cut depends on a selected spacer, connected to the inlet of the flow chamber.

Abstract: A hair clipper including a handle portion having a drive end with a first coupler formation, a blade assembly having a housing at least partially enclosing a reciprocating blade and a fixed blade, and having a second coupler formation for engaging the first coupler formation, the first and second coupler formations forming a ball-and-socket connection.

Abstract: A hand-held power-operated hedge trimmer for trimming plant growth such as hedges, shrubs, tree branches and the like. The hedge trimmer includes a housing containing a motor assembly, a blade assembly extending forwardly in a lengthwise direction from the housing, and a drive mechanism for coupling a movable cutting blade of the blade assembly to an output of the motor assembly for causing reciprocatory rectilinear movement of the movable cutting blade relative to a stationary combing blade in response to selective actuation of the motor assembly. The cutting blade includes a series of cutter teeth formed along its opposite longitudinal edges with each cutter tooth having a compound tooth profile. The compound tooth profile includes a pair of shear tooth segments formed along opposite lateral edges of the cutter tooth and a saw tooth segment formed at its distal edge between the shear tooth segments.

Abstract: A hedge trimmer having a hedge trimmer housing, a motor disposed in the hedge trimmer housing and a drive assembly associated with the motor. The drive assembly includes a first housing, a first gear connected to the rotatable drive shaft of the motor, a second housing, a second gear associated with the second housing, the second gear being in contact with the first gear so that the second gear rotates when the first gear rotates, and a support connector for causing the first and second housings to maintain a fixed positional relationship to ensure that the first and second gears remain in contact. The hedge trimmer also includes a first cutting blade operatively coupled to the second gear so that the first cutting blade reciprocates when the second gear rotates and a second cutting blade movable relative to the first cutting blade. The hedge trimmer may also include a gear-travel limit member to prevent any substantial misalignment of the second gear with respect to the first gear.

Abstract: A monofilament line for a rotating string trimmer has a main body portion of a generally circular configuration. One or more sharp longitudinal cutting edges are integrally formed with the main body portion and protrude from the main body portion at an angle selected to cause controlled flex and asymmetrical drag on the cutting element, as it is rotated by a rotating string trimmer. This causes a torsional rotation of the free end of the line as it is rotated; so that the main body portion of the cutting element first strikes the object to be cut, followed by contact with the sharp cutting edge. This configuration is selected to cause cleaner cuts of grass and the like, with less shredding of the cut ends of the grass blades. In addition, larger vegetation such as weeds and small stalky shrubs may be efficiently cut without abnormally high wear of the cutting line.

Abstract: A hedge trimmer blade assembly preferably a double acting assembly having upper and lower reciprocating blades. Superimposed cutting teeth extend laterally from the sides of the assembly from each of the blades. Guard portions extend from the teeth of the upper blade only on one side and from the teeth of the lower blade only on the other side. The guard portions are asymmetrical with a straight side and a tapered side, the taper preferably including a shallow bevel near the base and a sharper bevel near the tip of the guard portion. The cutting teeth of both upper and lower blades on both sides form oval shaped cutting chambers with cooperative hook configurations at the entry to the cutting chambers. The upper and lower blades are preferably identical in configuration but inverted one relative to the other in the assembly. The straight sides of the guard portions are all faced toward the power head of the trimmer to produce a hooking action as the user sweeps the trimmer during operation.

Abstract: A mowing apparatus has an elongated handling rod on the distal end of which is mounted a gear unit having a casing and an output shaft which extends substantially perpendicularly to the handling rod. The apparatus further includes a first disk cutting blade mounted so as to cover the side of the casing adjacent the output shaft, and a second disk cutting blade superposed on the side of the first disk cutting blade adjacent the casing. A connecting pin interconnects the first and second disk cutting blades such that the disk cutting blades are rotatable relative to each other about their axes. An eccentric shaft is adapted to revolve about the axis of the output shaft in accordance with the rotation of the output shaft, and is received in a cam slot provided for rotation as a unit with the second disk cutting blade about the connecting pin, so that the can slot reciprocate circumferentially about the connecting pin in accordance with the revolution of the eccentric shaft.

Abstract: In a reciprocating cutter type trimmer in which blades (14, 15) are reciprocative, the blades (14, 15) are each constructed of a power transmission member (19,18) and an edge member (17, 16) and constitute a separation type blade in which the blades are individually removable, upper and lower blade guide plates (20, 21) are provided for supporting the blades (14, 15) from above and below, and at least one of the upper and lower blade guide plates (20, 21) is rotatably pivoted on the case (4). Exchange of the blade can be carried out easily and rapidly, loss of parts during blade exchanging work can be prevented and the construction can be simplified.

Abstract: A hair trimmer comprising a body, a cutting assembly supported by the body and having a reciprocable cutter, a drive mechanism for reciprocating the cutter, the drive mechanism including a rotating cam, a drive lever engaged with the cam and with the cutter, and a hinge element for flexibly supporting the drive lever in engagement with the cutter and with the cam, the hinge element including a base fixed to the body, a bar fixed to the drive lever and a hinge arm extending between the base and the bar, the hinge arm including a first web and a second web closely spaced to and parallel with the first web.

Abstract: A power tool braking system includes a brake movably mounted to a frame of the power tool and a system for automatically moving the brake to a braking position. The brake has a first portion with a braking surface and a second portion. The system for automatically moving the brake to a braking position comprises a throttle of the power tool having a trigger with a section adapted to engage the brake second portion to move the brake to its braking position upon release of the throttle by a user.

Abstract: A reciprocating saw blade unit has a pair of upper and lower separable-type saw blades. Each separable-type saw blade has the shape of a long and narrow plate and is composed of: a blade member having an engaging portion; and a power transmitting member which has an engaging portion and is connected to a driving member for slidingly reciprocating the power transmitting member along its longer dimension. The blade members and the power transmitting members are detachably coupled by using the engaging portions. The upper and lower engaging portions are arranged not to be overlapped each other at any event.

Abstract: The present invention is a folding pole hedge trimmer, which is capable of operating at unusual heights, twenty (20) feet or more from the ground. It includes an elbow joint in which the upper hollow pole and the lower hollow pole can be folded for easy storage. The present invention utilizes a very light-weight reciprocating cutting head used for hedge trimming, shaping of tree crowns, cypresses, bougainvilleas and other tall growing plants. The present invention relates to a spring biased mechanical cable drive. The present invention is designed to reduce the weight, complexity and cost of the spring biased mechanical cable drive.

Abstract: The hair grooming clipper is driven by an improved eccentric coupling to a motor housed in the handle. The motor is incorporated in the clipper casing and utilizes an improved eccentric coupling that results in more power to the clipper head and less wear in the coupling. The improved design delivers more power to the clipper head, generating less heat.

Abstract: A hair trimmer comprising a body, a cutting assembly including a reciprocable cutter, drive structure supported by the body for reciprocating the cutter and including a drive member being reciprocable along an axis, hinge structure supported by the body for pivotably supporting the cutting assembly for movement between a first position wherein the drive member operably engages the cutter and a second position spaced from the first position, and structure for restricting movement of the drive member in a direction away from the axis when the cutting assembly moves to the first position from the second position.

Abstract: A reciprocating saw-blade device includes: a case; a main spindle rotatably supported by the case; bearings respectively arranged in front and rear end sections of the case; upper and lower saw blades protruding forward beyond the case and supported by the bearings in such a manner as to be slidable in the longitudinal direction thereof; eccentric cams formed on the main spindle such as to be axially spaced away from and 180.degree. out-of-phase with respect to each other; connecting rods respectively having big end portions pivotably connected with the eccentric cams and small end portions extending along the saw blades toward the rear end section of the case, where they are pivotably connected with the saw blades; and laterally-curved portions formed on the blades and extending in the longitudinal direction on one side of a middle section of the main spindle.

Abstract: A hedge cutting bar is shown and described as having rivets for securing a cutting blade between a retaining blade and a stationary blade. The rivet structure includes a central flange and distal hubs whereby the central flange may occupy slots in the cutting blade while the hubs attach within respective mounting apertures of the stationary blade and the retaining blade. The thickness of the flange is greater than the thickness of the cutting blade whereby a gripping force provided by the rivet is taken up at the flange to avoid pinching of the cutting blade between the stationary blade and the retaining blade. The described fastening arrangement is less suspectable to loosening under the vibrational forces imposed during use of the hedge cutting bar than that of prior fastening arrangements.

Abstract: A hair trimmer including a body adapted to support a cutting assembly having a reciprocable cutter, a rotatable drive housed by the body for reciprocating the cutter, and a hinge including a guide plate and a reciprocable yoke support which is engaged with the drive and which is reciprocably movable with respect to the guide plate for guiding movement of the drive relative to the guide plate.

Abstract: A clipper-type bush cutter comprises a mount part provided on the side of a power source, an upper part of a head unit connected rotatably within a predetermined angle range back and forth with respect to the mount part, and a lower part of the head unit connected rotatably through 360 degrees in the right and left directions at the bottom of the upper part and for reciprocatably supporting clipper-type cutting blades.A first relative angle adjusting device is disposed between the upper part and the mount part and a second relative angle adjusting device is disposed between the lower part and the upper part.

Abstract: An improved cutting apparatus for horticultural use comprises a first cutting device, a second cutting device, and a retaining plate. The second cutting device has a plurality of second elongated holes disposed thereon serving as sliding rails on which rolling beads travel. The retaining plate comprises a plurality of through holes through which rolling beads are partially exposed. The retaining plate also comprises a plurality of elastic press pieces affixed thereto, with each of elastic press pieces having a press portion located at one end thereof for pressing the exposed portion of the rolling beads so as to ensure that first and second cutting devices make a reciprocating motion in a linear manner.

Abstract: A motor-driven hair cutter is provided with a main cutter and a trimmer at a front end of an elongated housing. Each of the main cutter and the trimmer is a reciprocatory cutter comprising a toothed stationary blade and a toothed movable blade driven to reciprocate in hair shearing engagement with the stationary blade. The trimmer is movable between a retracted position in which a cutting edge of the trimmer is behind a cutting edge of the main cutter and a projected position in which the cutting edge of the trimmer projects forwardly of the main cutter so that the trimmer alone can be used. The trimmer blades are formed to be smaller in thickness as well as in cutting edge width than those of the main cutter blades in order to facilitate a delicate trimming of hairs in a restricted area of a user's head by the trimmer.

Abstract: Disclosed herein is a hair clipper blade set comprising a lower blade including a forward edge with a series of teeth extending therealong, upper and lower surfaces extending from said forward edge, and a threaded bore extending between the upper and lower surfaces, a movable upper blade including a forward edge with a series of teeth extending therealong, an upper surface, and a lower surface supported by the upper surface of the lower blade, a spring member for supporting and biasing the upper blade against the lower blade for linear movement of the forward edge of the upper blade parallel to the forward edge of the lower blade, which spring member comprises a forward portion including a forward end positionable against the upper surface of the movable blade, and a rear portion parallel to and spaced apart from the upper surface of the lower blade behind the movable upper blade and having therein an aperture, and a tension adjustment screw extending through the aperture, having an enlarged head engaging the

Abstract: An electrical motor operated clipper comprises a pair of longitudinal blades, wherein a longitudinal movable blade having a rectangular slot on the backward end is tightened to a fixed blade by a machine screw, a locking washer, and a belt-shaped spring. The electrical motor is mounted in a housing. The fixed blade projects from the forward end of the housing. A lever connects the movable blade in the slot to a transmission driven by the output of the motor, and is rotatably mounted in a metal cover which is mounted in the housing. A two-line-teeth comb-attachment can be attached onto the longitudinal blades for guiding the haircut.

Abstract: A hedge trimmer whose cutting section is curbed into an arc of a circle for purpose of cutting round shapes.

Abstract: A hand held trimmer for cutting heavy vegetation such as hedges or the like is disclosed. The trimmer includes a handle having a centrally disposed hand grip thereon. The handle includes mounting means for a conventional cutting means at one end and a convention motor at the other. The trimmer cutting means and trimmer motor are preferably disposed at substantially opposite ends of the handle such that the weight of one substantially counterbalances the weight of the other. A resilient drive shaft means is disposed within the handle and extends between the motor to the reciprocating blade drive means so as to substantially avoid damaging the motor and the drive means should the trimmer reciprocating blades become temporarily jammed during operation.

Abstract: A hand held trimmer for cutting heavy vegetation such as hedges or the like is disclosed. The trimmer includes a handle having a plurality of hand grips thereon. The handle includes mounting means for a conventional cutting means at one end and a convention motor at the other. The trimmer cutting and trimmer motor are preferably disposed at substantially opposite ends of the handle such that the weight of one substantially counterbalances the weight of the other. A resilient drive shaft means is disposed within the handle and extends between the motor to the reciprocating blade drive means so as to substantially avoid damaging the motor and the drive means should the trimmer reciprocating blades become temporarily jammed during operation.

Abstract: A throttle lever holding mechanism is disclosed in which an intermediate locking member is provided for at least one of first and second throttle levers. The throttle lever is moved in an operational direction so that the throttle lever is kept under a predetermined operational condition by the intermediate locking member. The throttle lever is further moved in the operational direction so that the locking of the throttle lever by the intermediate locking member is released.

Abstract: A pneumatically operated pile carpet trimmer includes a housing having a drive shaft projecting from one end thereof, and a shearing head removably threaded on the last-named end to surround the projecting end of the shaft. An operating lever which is pivotally mounted in the head is connected at one end to the movable shearing member of a set of shears which is removably mounted on the bottom of the head, and the opposite end of the lever is releasably connected to an eccentric carried by the drive shaft. When the latter rotates it oscillates the lever, which therefore reciprocates the movable shearing member. The head may have two sets of shears removably mounted thereon to operate in intersecting planes. In each case exhaust air from the housing is directed onto the shears to blow away cuttings.

Abstract: The invention is directed to a hedge trimmer having a pair of elongated cutters journalled for reciprocal movement. The two movable cutters are journalled on a guide bar so as to be movable in the longitudinal direction thereof and include cutting teeth which extend transversely to the direction of movement. Protective teeth are arranged with respect to the guide bar and are arranged next to the cutting teeth so as to be parallel thereto. The protective teeth are configured to be so long that the free end portions thereof project outwardly beyond the outer edges of the cutting teeth.

Abstract: In the following is described a guard device (11) for hedging shears, which have two cutter bars (13, 12) which are arranged parallel one above the other and are reciprocable relatively to one another, at least one of which bars is driven. To avoid the danger in the use of hedging shears (10) which might arise as the result of contact with the ground by the movable cutter bars, the leading ends of the two cutter bars (12, 13) is provided with a guard element projecting beyond it in the longitudinal direction and adapted to be fastened to a fixed structural part of the hedging shears (10).

Abstract: Concave curve-shaped stem capturing recesses are provided in edges of stem guiding slots in non-blade carrying member of a rechargeable, battery powered reciprocating hedge and shrub trimmer. The recesses have portions presenting acute stem contact angles to the guided stems, which portions extend inward from about the location of the blade tip a distance greater than about 50% of the effective blade height.

Abstract: The disclosure is directed to an improved electric hair clipper of a type with a pivotal head portion, having a comb plate for comb-cutting, in which a blade unit is arranged to be slidable for releasable attachment with respect to the head portion, in a longitudinal direction intersecting at right angles with a pivoting direction of the head portion through an engaging and sliding arrangement including sliding projections and corresponding guide grooves in which the sliding projections are fitted for sliding movement, so that no excessive loads are applied to a pivotal axis or pivotal angle restricting portion of the head portion, while the blade unit can be readily detached without having to touch the blade edge with a finger.

Abstract: An improved sheep shearing apparatus comprising a motor suspended from an overhead member by a suspension apparatus, the motor having a drive shaft which is oriented vertically downward and is connected via a flexible shaft assembly to a clipper head assembly. The flexible shaft assembly is characterized as having a sufficient length and torsion resistance such that wherein the clipper head assembly encounters a load during the shearing procedure the flexible shaft assembly resists twisting. The length of the flexible shaft assembly is approximately equal to the vertical distance between the motor and the working surface on which the sheep is to be sheared.

Abstract: The clipper is driven by a flexible shaft from a stationary motor supported by a stand clamped to an edge of a grooming table. Because the motor is not incorporated in the clipper casing as characterizes prior art clippers, the casing is lighter, operates at a cooler temperature and can be made more powerful by utilizing a motor of higher rated horsepower and rpm than the smaller type motors incorporated in a clipper casing.

Abstract: The present invention is a cutting unit having multiple sets of tandem blades; each set being composed of a first toothed blade moved reciprocatingly in a cutting motion relative to a second tooth blade. The blades are preferably curved.

Abstract: A hair clipper blade set including a spring member for supporting a upper blade against a lower blade and for linear movement of the upper blade and the lower blade parallel to their forward edges.The spring member is comprised of a forward end positionable against the upper surface of the movable upper blade, a rear planar portion parallel to and spaced apart from the upper surface of the lower blade, and means for releasably securing the spring member to the lower blade. The rear planar portion includes an aperture for receiving a tension adjustment screw secured in a threaded bore extending through the upper surface of the lower blade.

Abstract: A hedge cutting arrangement has a cutting device, a drive motor for driving the cutting device, a coupling arranged between the cutting device and the drive motor, two handles for two-hand operation, and two switching devices including actuating members, wherein the coupling is connected with both actuating members so that even when only one of the actuating members moves to its switching off position, the cutting device disconnects from the drive motor.

Abstract: A pneumatically operated pile carpet trimmer includes a housing having a drive shaft projecting from one end thereof, and a shearing head removably threaded on the last-named end to surround the projecting end of the shaft. An operating lever which is pivotally mounted in the head is connected at one end to the movable shearing member of a set of shears which is removably mounted on the bottom of the head, and the opposite end of the lever is releasably connected to an eccentric carried by the drive shaft. When the latter rotates it oscillates the lever, which therefore reciprocates the movable shearing member. The head may have two sets of shears removably mounted thereon to operate in intersecting planes. In each case exhaust air from the housing is directed onto the shears to blow away cuttings.