7149results about "Shearing machines" patented technology

A panel saw has a first cutting blade for cutting stock in a first axis and a second cutting blade for cutting the stock in a second axis. The first blade moveable from a cutting position to a position in which stock can be slid between the cutting blade and a supporting frame of the panel saw. The panel saw allows repeated cross cuts and rip cuts without changing the cutting location of the first cutting blade. A control system is configured to retract the first cutting blade from contact with the stock if the current draw exceeds a value. The control system may also retract a cutting blade when it senses the end of a panel being cut.

A table saw having a brake mechanism configured to engage and stop a blade is disclosed. The table saw includes a brake positioning system configured to adjust the position of the brake mechanism to maintain the brake mechanism in an operative position relative to the blade as the blade is raised and lowered.

Safety systems for power equipment are disclosed. The safety systems include a detection system adapted to detect contact between a person and a working portion of a machine, where the detection system is adapted to capacitively impart an electric charge on the working portion and to detect when that charge drops; and a reaction system associated with the detection system to cause a predetermined action to take place relative to the working portion upon detection of contact between the person and the working portion by the detection system. Machines equipped with safety systems are also disclosed, such as saws, jointers, etc. The machines include a working portion, such as a cutter or blade, a detection system adapted to detect a dangerous condition between a person and the working portion, and a reaction system associated with the detection system to cause a predetermined action to take place upon detection of the dangerous condition, such as a brake system to stop the working portion, a retraction system to retract the working portion, or a system to cover the working portion. The machines may include a control system adapted to control the operability of one or more of the working portion, the detection system and the reaction system.

A miter saw is disclosed having a base, a blade supported by the base, a detection system adapted to detect a dangerous condition between a person and the blade, and a reaction system associated with the detection system to cause a predetermined action to take place upon detection of the dangerous condition. The blade is rotatable, and moves into a cutting zone to cut a workpiece. The predetermined action may be to stop the blade from rotating, to create an impulse against movement of the blade into the cutting zone, or to cause the blade to move away from the cutting zone.

The present invention discloses a collapsible stand for a bench-top power tool and methods therefore. The stand includes a structural member pivotally secured to a lower peripheral region of a base of a power tool. A slidable member is slidably and pivotally connected to the lower peripheral region and is pivotally connected to the pivotal structural member. Lower distal ends of both the pivotal and slidable structural members provide feet for supporting the associated power tool in an expanded orientation thereof. As the stand is collapsed, a top end of the slidable structural member slides towards a top end of the pivotal structural member. Both structural members may be pivoted to an orientation generally parallel with the lower peripheral region and may be locked thereto by a locking mechanism. A pair of wheels are rotatably connected to the base for transporting the stand and power tool thereupon.

A miter cutting arrangement for a cutting machine is provided to accommodate cutting work at an angle or a bevel for precisely cutting on a work piece. It includes a platform support arm longitudinally mounting to a cutting head support bracket, a platform pivot arm transversely extended from the platform support arm, a head platform pivotally connected with the platform pivot arm to support a motor, a miter supporting unit, and a locker device for selectively locking the cutting head at the normal position and the slanted position. The miter supporting unit includes a miter support provided at an outer side of the head platform and a miter stopper provided at an outer end of the platform pivot arm to block the miter support when the head platform is rotated at the slanted position.

A table saw guard assembly for guarding a blade on a table saw is provided. The table saw guard assembly includes a support structure and a hood assembly including at least one of a front curtain, first side curtain, second side curtain and top curtain, wherein each of said curtains are independently moveable and / or removable from the hood assembly. Furthermore, a table saw guard assembly is provided including a quick release mechanism for connecting the hood assembly to the support structure.

A woodworking machine having one or more dangerous portions of the machine is disclosed. The machine also includes a safety system configured to detect accidental contact between a person and at least one of the dangerous portions by electrically coupling a signal to the person's body, and detecting if the signal becomes coupled to the dangerous portion.

An embodiment of the present invention is directed to a riving knife assembly for a dual bevel table saw, comprising: a first armature configured for coupling with a beveling member; a second armature adjustably and rotatably coupled with the first armature; a first mounting member coupled with the second armature; a first riving bracket coupled with the second armature and configured for adjustably coupling with a bearing retaining nut of a dual arbor assembly; a second riving bracket coupled with the first mounting member and configured for adjustably coupling with the inside of a first bore of a first height bracket; a quick release handle disposed upon the first mounting member; an eccentric shaft coupled with the quick release handle; a locking pin having a locking pin body, a second mounting member, a head member coupled with a sheathing member, and a spring loaded assembly, the locking pin operationally coupled with the eccentric shaft; and, a riving knife configured with an engagement assembly for engaging with the locking pin; wherein the spring loaded assembly enables the head member and a circular engagement member disposed on the locking pin body proximal to the head member of the locking pin to be set in a locked position and a release position relative to the second mounting member, the sheathing member and the riving knife; wherein the locked and release positions are established by manipulation of the quick release handle.

A miter saw is disclosed having a base, a blade supported by the base, a detection system adapted to detect a dangerous condition between a person and the blade, and a reaction system associated with the detection system to cause a predetermined action to take place upon detection of the dangerous condition. The blade is rotatable, and moves into a cutting zone to cut a workpiece. The predetermined action may be to stop the blade from rotating, to create an impulse against movement of the blade into the cutting zone, or to cause the blade to move away from the cutting zone.

A saw machine includes a seat disposed in a housing, two frames rotatably secured to the seat with pivot pins and each having a sector gear and a saw blade, and a driving device for driving the saw blades. A shaft is rotatably secured to the seat and has a worm engaged with the sector gear of one of the frames, to rotate and adjust the frame relative to the seat. A conduit is rotatably engaged on the shaft and has a worm engaged with the sector gear of the other frame, to adjust the other frame relative to the seat. A support device includes a block having an orifice to rotatably receive the shaft and to stably support and retain the shaft to the seat.

Apparatus for releasably adjusting a position of a first portion of a device relative to a second portion of the device. The first portion includes a first surface, and the second portion includes a second surface. A workpiece support surface is defined by the first and second surfaces, and the first surface is rotatable relative to the second surface. A locking mechanism is provided to selectively restrain rotation of the first surface relative to the second surface. An indexing mechanism optionally is provided including a detent mechanism which selectively restrains rotation of the first surface relative to the second surface in one of a plurality of predetermined positions.