Abstract: A height adjustment mechanism of a table saw is provided with a support including a concave seat, two first sleeves spaced from both ends of the seat respectively, a guiding hole, and two parallel brackets spaced from the guiding hole; a drive rod rotatably extended through the brackets; a first bevel gear mounted to an open end of the drive rod; first and second guide uprights fastened in the first sleeves respectively; a threaded guide rod inserted through the guiding hole; a second bevel gear at a bottom end of the guide rod to mesh with the first bevel gear; a motor including a threaded guide hole secured to the guide rod, two second sleeves with the first and second guide uprights sliding through respectively; and two support elements each including a concave base member, a sliding rail on the base member, and a fastening member.

Abstract: A table saw includes a movable rip fence and a base including an upper cutting surface through which a blade extends. The rip fence includes front and rear clamping mechanisms connected to front and rear ends of a casing respectively. The front clamping mechanism includes a frame, a lever pivotably secured to the frame to be pivotal between a locked position and a released position, the lever having an internal cam member, a clamping member pivotably secured to the lever, the clamping member having a hook at an open end, a spring biased shaft, and a C-clip for retaining an inner end of the shaft in the frame. A pivotal movement of both the lever and the clamping member causes the cam member to push the shaft inward until the shaft is pushed outward to urge against the cam member in the locked position.

Abstract: Supports for a table saw blade assembly are provided and each support includes an elongated L-shaped bracket releasably secured to the upper cutting surface and including a curved slot; a pivotal plate including a projection slidable in the curved slot, and two holes through the projection and the pivotal plate; a first clamping plate; and a second clamping plate. The first clamping plate, the bracket, the pivotal plate, and the second clamping plate are fastened together with the pivotal plate being capable of sliding along the curved slot.

Abstract: A leg lifting mechanism for a table saw including a circular saw blade extending upward from an upper cutting surface, and a base mounted under a stand, the base having first and second leg assemblies, a first wheel assembly pivotably secured to the first leg assembly, and at least two second wheel assemblies secured to the second leg assembly is provided with a foot pedal including two side flanks pivotably secured to the first leg assembly, each of the side flanks having a straight edge and a cam edge. Clockwise rotation of the foot pedal about the first wheel assembly inward moves the cam edges on top of the first wheel assembly until portions of the straight edges grappingly engage the top of the first wheel assembly and portions of the first and second leg assemblies are lifted above the supporting surface.

Abstract: A height adjustment mechanism of a table saw is provided with a support including a concave seat, two first sleeves spaced from both ends of the seat respectively, a guiding hole, and two parallel brackets spaced from the guiding hole; a drive rod rotatably extended through the brackets; a first bevel gear mounted to an open end of the drive rod; first and second guide uprights fastened in the first sleeves respectively; a threaded guide rod inserted through the guiding hole; a second bevel gear at a bottom end of the guide rod to mesh with the first bevel gear; a motor including a threaded guide hole secured to the guide rod, two second sleeves with the first and second guide uprights sliding through respectively; and two support elements each including a concave base member, a sliding rail on the base member, and a fastening member.

Abstract: A table saw includes a movable rip fence and a base including an upper cutting surface through which a blade extends. The rip fence includes front and rear clamping mechanisms connected to front and rear ends of a casing respectively. The front clamping mechanism includes a frame, a lever pivotably secured to the frame to be pivotal between a locked position and a released position, the lever having an internal cam member, a clamping member pivotably secured to the lever, the clamping member having a hook at an open end, a spring biased shaft, and a C-clip for retaining an inner end of the shaft in the frame. A pivotal movement of both the lever and the clamping member causes the cam member to push the shaft inward until the shaft is pushed outward to urge against the cam member in the locked position.

Abstract: Supports for a table saw blade assembly are provided and each support includes an elongated L-shaped bracket releasably secured to the upper cutting surface and including a curved slot; a pivotal plate including a projection slidable in the curved slot, and two holes through the projection and the pivotal plate; a first clamping plate; and a second clamping plate. The first clamping plate, the bracket, the pivotal plate, and the second clamping plate are fastened together with the pivotal plate being capable of sliding along the curved slot.

Abstract: A nail gun capable of preventing a trigger from being pulled in a nail-empty condition is provided. The nail gun includes a housing connected with a trigger, a muzzle, a nail driving member moveably mounted in the muzzle and a nail magazine communicated with the muzzle for accommodating nails and a nail pushing member for pushing the nails toward the muzzle, and a side of the nail pushing member has a locking portion; and a safety member moveably mounted to the muzzle for upward or downward movement. An end of the safety member has a stop portion. A position of the locking portion is corresponding to that of the stop portion for selectively stopping the upward or downward movement of the safety member.

Abstract: A magazine of nail gun is provided with a nail receptacle; a cover slidably mounted on the receptacle; a cavity on an uneven bottom of the cover; a first hole from the cover to the cavity; a spring biased button in the first hole; a first retaining member secured to the button and urging against a bottom of the cavity so as to retain the button; a second hole through the receptacle and aligned with the first hole; a spring biased detent in the second hole and projecting out of the second hole to urge against a bottom of the button; and a second retaining member secured to the detent and urging against the bottom of the receptacle so as to retain the detent. The cover is locked by the receptacle in a storage position of the magazine.

Abstract: A fence mounting structure for circular saw, which includes a main fence, which is affixed to the base plate of the circular saw, a supplementary fence, which has a bottom rail inserted into a sliding groove in the main fence and a locating flange supported on the top side of the main fence, a holding down screw vertically fastened to the main fence and fastened tight to give a downward pressure to the locating flange of the supplementary fence after adjustment of the supplementary fence relative to the main fence, and a tightening up screw horizontally fastened to the main fence and fastened tight to give a forward pressure to a locating groove at the bottom rail of the supplementary fence in horizontal direction after adjustment of the supplementary fence relative to the main fence.

Abstract: A sawdust collection system includes a sawdust duct secured in a saw blade housing and having an enlarged portion formed on a front end thereof. A sawdust chute is partially pivotally received in a lower portion of the enlarged portion of the sawdust duct such that the sawdust chute can be swung relative to the sawdust duct. A first stopper laterally outwardly extends from a bottom of the sawdust chute and a torsion spring is mounted between the sawdust duct and the sawdust chute to prevent the sawdust chute from a vibration during operating. A second stopper laterally outwardly extends from a top of the sawdust chute. The second stopper selectively abuts a distal edge of the enlarged portion for limiting the moving range of the sawdust duct.

Abstract: A circular saw includes a universal arm mounted to a rear end of a base member of the circular saw. A housing with a saw blade is pivotally connected to the universal arm. A drive device is longitudinally mounted to the housing for driving the saw blade and includes a casing secured on the housing. A motor is securely received in the casing and radially corresponding to the saw blade along a moving direction of the saw blade. A worm is longitudinally secured on a free end of the shaft extending from the motor. A worm gear is laterally rotatably mounted to the casing and engaged to the worm. An endless belt is mounted and surrounding a first belt wheel extending from the saw blade and the second belt wheel extending from the worm gear for driving the saw blade when the motor is operated.

Abstract: A sawdust collection system includes a sawdust duct secured in a saw blade housing and having an enlarged portion formed on a front end thereof. A sawdust chute is partially pivotally received in a lower portion of the enlarged portion of the sawdust duct such that the sawdust chute can be swung relative to the sawdust duct. A first stopper laterally outwardly extends from a bottom of the sawdust chute and a torsion spring is mounted between the sawdust duct and the sawdust chute to prevent the sawdust chute from a vibration during operating. A second stopper laterally outwardly extends from a top of the sawdust chute. The second stopper selectively abuts a distal edge of the enlarged portion for limiting the moving range of the sawdust duct.

Abstract: A feeding device for a table saw includes a sliding board slidably mounted on one side of a worktable of the table saw and having a moving direction corresponding to a saw blade. The sliding board includes two grooves defined in two opposite sides thereof and respectively parallel to the moving direction of the sliding board. A moving seat is selective slidably mounted on one side of the sliding board. A pushing rod is laterally slidably mounted to the moving seat and has a first side forming a pushing face for abutting against a datum of a workpiece. A first locking device and a second locking device respectively extend through the pushing rod and the moving seat to selectively hold the pushing rod and the moving seat in place for confirming a cutting angle of the workpiece.

Abstract: A movement adjust device for a circular saw includes a holder secured on a base member of the circular saw and having two through holes defined in two opposite ends the holder. Two first guide bars each slidably extends through a corresponding through hole in the holder. Each first guide bar has a first end securely received in a first stopper and a second end securely received in a connector in which two through holes is defined between the second end of each of the two first guide bars. Two second guide bars each slidably extend through a corresponding through hole in the connector. Each second guide bar has a first end securely received in a second stopper and a second end securely received in a third stopper that is secured on a hinge of the circular saw.

Abstract: A circular saw includes a base member abutting a supporting surface and an operating arm pivotally mounted to the base member. A gearbox is formed on a free end of the operating arm. The gearbox includes a first cavity and a second cavity respectively laterally defined in two opposite side of the gearbox. A hole is laterally defined in a bottom of the first cavity and communicates with the second cavity. A handle extends from the gearbox for user to easily operate the circular saw. A motor is laterally securely mounted to the bottom of the first cavity and partially received in the first cavity in the gearbox. A blade device is laterally mounted to the second side of the gearbox and connected to the motor so that the blade device is driven when the motor is operated.

Abstract: A clamping device for a circular saw includes a body that is adapted to be secured on a worktable of the circular saw. A threaded rod longitudinally extends through the body. A braking block is pivotally mounted to the body for selectively engaged to the threaded rod and torsion spring is mounted between the body and the braking block to provide a restitution force to the braking block. A pin laterally extends through the body and the braking block to hold the braking block in place.

Abstract: A movement adjust device for a circular saw includes a holder secured on a base member of the circular saw and having two through holes defined in tow opposite ends the holder. Two first guide bars each slidably extends through a corresponding through hole in the holder. Each first guide bar has a first end securely received in a first stopper and a second end securely received in a connector in which two through holes is defined between the second end of each of the two first guide bars. Two second guide bars each slidably extend through a corresponding through hole in the connector. Each second guide bar has a first end securely received in a second stopper and a second end securely received in a third stopper that is secured on a hinge of the circular saw.

Abstract: A feeding device for a table saw includes a sliding board slidably mounted on one side of a worktable of the table saw and having a moving direction corresponding to a saw blade. The sliding board includes two grooves defined in two opposite sides thereof and respectively parallel to the moving direction of the sliding board. A moving seat is selective slidably mounted on one side of the sliding board. A pushing rod is laterally slidably mounted to the moving seat and has a first side forming a pushing face for abutting against a datum of a workpiece. A first locking device and a second locking device respectively extend through the pushing rod and the moving seat to selectively hold the pushing rod and the moving seat in place for confirming a cutting angle of the workpiece.

Abstract: A circular saw includes a universal arm mounted to a rear end of a base member of the circular saw. A housing with a saw blade is pivotally connected to the universal arm. A drive device is longitudinally mounted to the housing for driving the saw blade and includes a casing secured on the housing. A motor is securely received in the casing and radially corresponding to the saw blade along a moving direction of the saw blade. A worm is longitudinally secured on a free end of the shaft extending from the motor. A worm gear is laterally rotatably mounted to the casing and engaged to the worm. An endless belt is mounted and surrounding a first belt wheel extending from the saw blade and the second belt wheel extending from the worm gear for driving the saw blade when the motor is operated.