248results about "Fret saws" patented technology

Machines with safety systems are disclosed. The machine may take the form of woodworking machines including table saws, band saws, miter saws, hand-held circular saws, pneumatic chop saws, radial-arm saws, jointers, planars, routers and shapers. The machines may include an operative structure configured to perform a task, where the operative structure includes a cutting tool adapted to move in at least one motion, and a safety system adapted to detect the occurrence of an unsafe condition between a person and the cutting tool and for mitigating the unsafe condition. The safety system may include a detection subsystem and a reaction subsystem.

A kit (10) for resection of bone (12) for use in implantation of a joint prosthesis (14) is provided. The kit (10) includes a guide (16), a tool (26) and a stop (32). The guide (16) defines an opening (20) through the guide (16). The guide (16) is in cooperation with the bone (12). The tool (26) may be constrained within the opening (20) of the guide (16). The tool (26) includes a cutting edge (30) for resection of bone (12). The stop (32) cooperates with the guide (16) and the tool (26) to limit the movement of the tool (26) within the guide (16) so that the position of the cutting edge (30) with respect to the bone (12)m may be controlled. The stop (32) includes a plurality of positions (34) with respect to the tool (26) and the guide (16).

A sawing apparatus and a saw fence. The saw apparatus may include a work surface. The saw may include a rail system disposed along the edges of the work surface, for the attachment of accessories thereto. The saw may be provided with workpiece guide adapted to be attached to the rail system for guiding workpieces during the operation of the saw. The workpiece guide may also be provided with an infeed extension that rides on the rail system and is capable of supporting workpieces during the operation of the saw. The infeed extension may be adjustable relative to the work surface of the saw. The saw may further be provided with a debris collection system for the collection of debris produced by the cutting operations of the saw.

The invention relates to a contact protection device. The device according to the invention has a sensor (5) for generating and detecting an electromagnetic field situated in the vicinity of a moving part (1) that should not be touched. The device according to the invention also has an evaluation unit (8) that is connected to the sensor (5) in order to evaluate sensor signals that can be generated by the sensor (5), wherein the evaluation unit (8) can generate an evaluation signal. Finally, a control unit (9) connected to the evaluation unit (8) is provided, which is designed and can be operated so as to control the movement of the part (1) as a function of the evaluation signal.

A hand tool includes a replaceable cutting portion having an elongate cutting surface, a body and a handle. The body receives displaceable protecting apparatus for shielding the cutting surface of the cutting portion when not in use. A forward distal end of the protecting apparatus contacts a portion of the surface of the object to be cut such that when pressure is applied against the object surface displacement of the protecting apparatus relative to the replaceable cutting portion is effected to expose only as much of the cutting surface as needed to effect the required cut. Alignment means maintain alignment of the replaceable cutting portion relative to the protecting apparatus throughout the cutting. When the cutting action is completed resilience means facilitates return of the protecting apparatus so the cutting surface is no longer exposed.

Fanned air generated by a fan to cool a motor is discharged from a housing through fanned air discharge ports toward an opening formed in a base. The fanned air discharged toward the opening is then introduced into a groove in fluid communication with the opening. The groove is formed in a bottom surface of the base and has an open side at a front side of the base. The fanned air is then discharged from the front side of the base, blowing off saw dust on a cutting object so as to prevent dust from accumulating on a marking line on the cutting object.

The device according to the invention has a sensor (5) for generating and detecting an electromagnetic field situated in the vicinity of a moving part (1) that should not be touched. The device according to the invention also has an evaluation unit (8) that is connected to the sensor (5) in order to evaluate sensor signals that can be generated by the sensor (5), wherein the evaluation unit (8) can generate an evaluation signal. Finally, a control unit (9) connected to the evaluation unit (8) is provided, which is designed and can be operated so as to control the movement of the part (1) as a function of the evaluation signal.

A portable cutting device having a cutting tool for cutting a material. The cutting device includes a motor driving the cutting tool and a shroud at least partially enclosing the cutting tool. The shroud defines a debris accumulation chamber for gathering debris created by the cutting tool cutting the material. An impeller is operatively coupled to the motor and driven by the motor to create suction pressure to draw the debris out of the debris accumulation chamber and into a collection bag.

An reciprocating saw comprising a housing, a motor, a spindle movably supported within said housing and having a front end adapted to support a saw blade, a drive assembly, and an adjustable shoe assembly. The adjustable shoe assembly includes a shoe, a shoe support member pivotally supporting the shoe, a locking member pivotally supported by the housing, and a lever connected to the locking member.

Fanned air generated by a fan to cool a motor is discharged from a housing through fanned air discharge ports toward an opening formed in a base. The fanned air discharged toward the opening is then introduced into a groove in fluid communication with the opening. The groove is formed in a bottom surface of the base and has an open side at a front side of the base. The fanned air is then discharged from the front side of the base, blowing off saw dust on a cutting object so as to prevent dust from accumulating on a marking line on the cutting object.

A circular saw having a saw blade depth adjustment detent mechanism for facilitating rapid positioning of a saw blade at predetermined depth positions includes a housing enclosing a motor disposed therein that rotates a circular saw blade. The circular saw includes a foot which rides on a workpiece to guide the saw blade during cutting operations. The saw blade depth adjustment detent mechanism pivotally interconnects the foot to said housing such that the circular saw blade is adjustable to the foot through a number of saw blade depth settings within a range of saw blade depth of cuts relative to the foot. The saw blade depth adjustment detent mechanism includes a saw blade depth detent and a second member having a plurality of spaced saw blade depth recesses that are each matingly engageable with the saw blade depth detent to provide the range of saw blade depths.

The invention relates to a power tool (1), especially in the form of a hand-held jigsaw (2). In order to allow for a semi-autonomous operation which assists the user to guide the tool, the tool is provided with a sensor system (27) for observing a detection surface (31, 43) within which the desired working direction is detected as a path default (23) for the saw blade (8) serving as the tool (7) with respect to its alignment relative to the jigsaw (2), the detected path default being intended for downstream control means (26). Said control means align the saw blade (8) relative to the path default (23) by rotating it about its longitudinal axis (25) so that the user guiding the saw blade (2) only has to make sure that the path default (23) extends inside the detection surface (31, 43).

The present invention discloses an adjustable base for a portable saw and a portable saw therefore. The base includes a longitudinal shell secured to the housing, and mounted to a baseplate. A shaft is mounted to the housing extending through a slot formed in the shell. A collar is connected to the shaft and has a first cam surface cooperating with a corresponding second cam surface of the housing. Rotation of the collar in an unlocked direction extends the shaft away from the housing. A clamp member is received within a shell inner region and cooperates with the shaft. The shaft is threadably engaged to one of the collar, the housing or the clamp member so that rotation of the collar in the unlocked direction either extends the shaft further away from the housing or extends the clamp member along the shaft away from the housing.

A cutting tool includes a saw blade and a blade case adapted to cover the saw blade. A light may have a light for illuminating a portion of a workpiece that will be cut by the saw blade during a cutting operation. The light may be mounted within the blade case, so that the light is laterally displaced from the saw blade. A mounting device may be utilized to receive the light and the mounting device may be disposed within the blade case.

A battery-operated hand power tool (10), in particular a power saw (101), having a housing (12) into which a battery pack (28) can be detachably inserted in captive fashion, and between the battery pack (28) and the housing (12), an elongated auxiliary tool (38) is stored, in particular for releasing the tool, preferably the saw blade, is made more secure and convenient to manipulate by disposing the auxiliary tool (38) in such a way that it is visible from outside and is easy to feel, and in particular can be reached through.

A circular saw has a housing, a direct current motor, a battery assembly, a handle having first and second ends, a circular saw blade and a base plate. The motor is located outside of an area defined by the radius of the circular blade and between the first and second ends of the handle and the blade is laterally aligned with the handle. The circular saw also has a center of gravity which lies close to the plane defined by the saw blade, is below the handle and is within the length of the base plate. As a result of this arrangement, the circular saw of the present invention reduces the influence of the torque created during a cutting operation and improves the balance and operation of the circular saw.

Two batteries (B1, B2) may be attached to a cutting tool (1), so that the total of the voltages of the two batteries connected in series with each other may be supplied to an electric motor (11) of the cutting tool. The electric motor may have a rated voltage that may be the same as the total of the voltages of the two batteries.

A circular saw (1) includes a base (2) and a main body (3) mounted on the base and provided with an upper blade guard (7). Disposed behind the upper blade guard (7) is a stopper (22) which includes an upper curved portion (23) and an lower portion (24) coupled to the curved portion (23). One end of the lower portion (24) is attached to the main body (3) with a pivot screw (25) behind the blade guard (7) so as to permit the stopper to pivot on the screw (25) in parallel with a circular blade (5). Additionally, the curved portion (23) includes an arcuate guide slot (26). The stopper (22) further includes a fixing bolt (27) screwed in a boss (29) formed on the rear surface of the blade guard. The bolt (27) includes a lever (30) to be manually operated to selectively secure the curved portion to the bolt and release the curved portion therefrom. When the curved portion (23) is released, its pivotal position relative to the main body towards the base can be manually changed. Provided on the base is a projection (32) which is abutted by the stopper (22) when the main body (3) is lowered toward the base (2). When the curved portion (23) abuts the projection's upper surface (33), the amount of the blade (5) projecting below the base (i.e., the depth of cut) corresponds to the aforementioned relative position of the curved portion (23) with respect to the base (2).

A portable circular saw includes a housing, a motor, a circular saw blade, a saw cover, and a light irradiation unit. The motor is accommodated in the housing. The circular saw blade is driven by the motor for cutting a cutting object in a cutting direction. The circular saw blade has one side surface and another side surface. The saw cover is provided to the housing for partially covering the circular saw blade. The light irradiation unit is provided on the saw cover. The light irradiation unit includes a first irradiation device located on the one side surface side of the circular saw blade and a second irradiation device located on the another side surface side of the circular saw blade for emitting a light to illuminate a region including a leading end portion of the circular saw blade and a spot on the cutting object. The spot is ahead of the leading end portion in the cutting direction.

A circular saw includes a housing, a motor having a rotating axis and a center of gravity on the rotating axis, a handle, a circular blade, a fixed guard, and a base plate having a width supporting the housing. The motor and the circular blade are parallel or coplanar with respect to each other and the circular saw does not extend beyond the width of the base plate in the width direction.

The invention provides a hand-held circular saw comprising a base plate and a cutting unit pivotally mounted on the base plate. The cutting unit includes a saw blade, a motor driving the saw blade, and a fixed guard covering at least a part of the saw blade. A guide plate with an arc-shaped slot extends from the base plate. A connecting member or bracket has a first end that is mounted to the cutting unit and a body portion operably connected to the guide plate by a locking element, namely a bolt, and a lever. Once released, the lever allows for movement of the bracket and the blade with respect to the guide plate. A stopper is mounted on the guide plate and is movable between a first position and a second position. In the first position, at least a part of the stopper intercepts the arc-shaped slot and stops the bolt from moving further within the arc-shaped slot. In the second position, at least a part of the stopper does not contact the bolt whereby the bolt is free to move within the slot and the bracket is fully adjustable.

A plunge saw comprising a body housing enclosing a motor wherein the plunge saw rotates about a forward pivot point while a lower cutting base bottom planar surface remains in contact with a workpiece. A saw blade is operatively coupled to the motor, wherein the saw blade plunges into a workpiece in a rotational arc thereby exerting both a lateral and vertical force that reduces the likelihood of saw kick back. The saw can be turned on, operated and turned off with a single hand.

A hand-held cutting tool may include a handle and a battery pack. The handle has a rear portion with respect to a work proceeding direction along which the cutting tool is moved for performing a cutting operation. When the battery pack is mounted to the rear portion of the handle, the longitudinal direction of the battery pack extends non-parallel with the work proceeding direction.

A mechanism and method is provided for controllably loading multiple food loaves into the slicing station of a continuous slicing machine. The parallel loaves that are engaged by a common loaf feed drive or side-by-side, independent loaf feed drives are engaged by the loaf feed drive or drives simultaneously such that the interface or seam between a preceding loaf and a trailing loaf in different loaf feed paths are located substantially at the same location during slicing of two side-by-side loaf streams. A clamp device is provided that clamps multiple food loaves when loaded to move along the parallel food loaf paths together, wherein the clamp device can be released once the multiple food loaves are simultaneously engaged by the loaf feed drive.

A circular power saw (10), composed of a saw assembly (12) with a housing (14, 16) that encloses a motor and a saw blade (18) capable of being driven by the motor, and that includes a handle, whereby the saw assembly (12) is pivotably supported relative to a footplate (22) such that it can be adjusted between a minimum and maximum cutting depth, is protected against kickback by the fact that, during sawing, the saw assembly (12) is decoupled from handling forces acting on the saw blade (18), in particular from the handle (24).

A power hand tool foot assembly includes a platform having an arch portion. A swivel lock is within the arch portion, with a mount connecting the swivel lock to the tool housing. A lever is pivotally mounted on the mount. When the lever is in a locked position, the swivel lock and platform are locked in place. When the lever is in an open position, the longitudinal and angular position of the platform and swivel lock may be adjusted.

The present invention is an attachable rolling plate assembly which can be attached as a single unit to a portable cutting tool to facilitate the safe rolling movement of the portable cutting tool on the workpiece. The invention comprises a frame assembly formed from a single piece of molded material such as fiber enriched plastic having a pair of oppositely disposed longitudinal sidewalls with stabilizer fins extending therefrom, and a flat base portion having a pair of parallel stabilizer tubes molded therein. The invention further includes an adjustable bevel gear assembly by which the angle of orientation of the cutting blade can be quickly changed. The invention also includes a cutting guide assembly to facilitate a straight cut, reduce torsional rotation of the saw blade and reduce kickback of the saw.