Abstract: A pneumatic nail gun has a body, a nail magazine, an actuating device, a trigger assembly and a push bar assembly. The body has a housing, a handle and a nail firing device. The actuating device is mounted between the housing and the handle. The actuating device has a channel, a piston rod, an O-ring and a first spring to provide a restitute force to the piston rod. The trigger assembly is attached to the body and has an inner cap pivotally attached to the body, an outer cap slidably attached outside the inner cap, an actuating lever pivotally attached inside the inner cap and a second spring. Accordingly, the outer cap can be moved to a lock position to keep the nails from being fired unintentionally, and the pneumatic nail gun is safe in use.

Abstract: A blade clamping device includes a driving shaft and a base member fixedly mounted to the driving shaft. An opening is defined in the base member and a blade is inserted in the base member and connected to the driving shaft. A cam member is pivotably engaged with the opening of the base member and a cam head contacts a side of the blade. The base member is received in a casing which is connected to the electric saw and an opening is defined in the casing. A lever is pivotably engaged with the opening of the casing and includes a pushing end which is located beneath a bar of the cam member so that when pivoting the lever, the pushing end pivots the cam member to remove the cam head from the blade.

Abstract: A reciprocating saw includes a main body, a blade holding device mounted on the main body, and a blade detachably mounted on the support seat of the main body by the blade holding device. The blade holding device includes a bushing, a slide, a sleeve, a positioning ball, a torsion spring, and a guide rod. Thus, the blade can be mounted on and detached from the support seat of the main body easily and conveniently by rotation of the sleeve, thereby facilitating the user replacing the blade.

Abstract: A blade clamping device includes a driving shaft and a base member fixedly mounted to the driving shaft. An opening is defined in the base member and a blade is inserted in the base member and connected to the driving shaft. A cam member is pivotably engaged with the opening of the base member and a cam head contacts a side of the blade. The base member is received in a casing which is connected to the electric saw and an opening is defined in the casing. A lever is pivotably engaged with the opening of the casing and includes a pushing end which is located beneath a bar of the cam member so that when pivoting the lever, the pushing end pivots the cam member to remove the cam head from the blade.

Abstract: An angle adjustable pedal assembly for elliptical exercisers includes a pedal frame and a pedal which is pivotably connected to two sides on an end of the pedal frame. Each side wall has a hole with three notches defined in an inside of the hole and the pedal has two connection plates each of which has a reset slot and a set slot which communicates with the reset slot. A pin extends through one of the reset slot and the set slot, and is engaged with one of the three notches in the side walls so that the pedal can be set at different angle relative to the pedal frame by engaging with one of the three notches in the side walls.

Abstract: A circular sawing machine having a hidden-type infrared guide device includes a main frame, a saw base pivotally mounted on the main frame, an infrared guide device, and an operation set. The infrared guide device is mounted on the saw base and includes a slide slidably mounted on the saw base, and an infrared indication lamp mounted on the slide. The slide is formed with an elongated slot. The operation set is mounted on the infrared guide device, and includes a drive plate, a movable pin, and an elastic plate. The movable pin is extended through the elongated slot of the slide and has a first end pivoted with the drive plate, and a second end combined with the elastic plate. The elastic plate is mounted on the movable pin and rested on the slide.

Abstract: A grinding tool includes a handle with a grinding wheel connected thereto and driven by a driving device. An opening is defined in the handle and a switch device is received in the opening with which a cover is engaged. A recess is defined in an outer periphery of the cover and a hole is defined through the cover. A pushing member is slidably engaged with the recess and a stepped protrusion extending from an underside of a first end of the pushing member is engaged with an inner periphery of the hole. A gap is defined between a second end of the pushing member and a surface defining the recess. An activation member is connected to the sliding member via the hole and has a convex contacting the switch device. A spring is connected between the cover and the activation member. The activation member shuts off the switch device when the sliding member is pulled by the spring by pushing the second end of the pushing member.

Abstract: A circular saw having a saw arm angle adjusting device includes a rotation shaft mounted between the base and the saw arm, and an adjusting device mounted on the base for adjusting the angle of the saw arm, so that the saw arm may be pivoted through an angle and may be positioned. The adjusting device includes a drive shaft, a drive unit, a driven unit, and an adjusting unit. Thus, the user may directly operate the drive shaft, so as to operate the adjusting device for adjusting the angle of the saw arm relative to the base so that the user may adjust the angle of the saw arm easily and conveniently.

Abstract: A circular saw having a saw arm angle adjusting device includes a rotation shaft mounted between the base and the saw arm, and an adjusting device mounted on the base for adjusting the angle of the saw arm, so that the saw arm may be pivoted through an angle and may be positioned. The adjusting device includes a drive shaft, a drive unit, a driven unit, and an adjusting unit. Thus, the user may directly operate the drive shaft, so as to operate the adjusting device for adjusting the angle of the saw arm relative to the base so that the user may adjust the angle of the saw arm easily and conveniently.

Abstract: A successive switch device of a slot cutting machine includes opposite first push button and second push button mounted on the handle, and a positioning block secured on secured on the press switch. The first push button and the second push button may be locked with the positioning block, so that the press switch may be positioned after being pressed. Thus, the slot cutting machine may be operated successively. In addition, the slot cutting machine is available for the right-handed and left-handed users.

Abstract: A blowing device includes a casing having an circular wall located eccentrically in the casing. A rotor is rotatably received in the circular wall and a plurality of blades retractably extend from the rotor and contact an inner periphery of the circular wall. A first inlet is defined through the casing and an outlet is defined through the circular wall. A second inlet is defined through the circular wall. A fitting extends through the casing and is engaged with the outlet. When the rotor is rotated in the circular wall, a plurality of partitions are defined by the blades in the circular wall and is sent out from the fitting to blow the wood powder or debris.

Abstract: A grinding tool includes a handle with a driving device for driving a grinding member connected to a shaft extending from the driving device. A cone-shaped recess is defined in a distal end of the shaft and a flexible cone-shaped piece is received in the cone-shaped recess of the shaft. The grinding member has a shank extending through the flexible cone-shaped piece and a retaining cap is mounted to the shank and threadedly mounted to the shaft. The grinding member can be replaced with a grinding wheel and a fender is rotatably mounted to the shaft. A quick release device is connected to two lugs on the C-shaped collar of the fender so that the fender can be conveniently loosened and rotated by operating the quick release device.

Abstract: A grinding tool includes a handle with a grinding wheel connected thereto and driven by a driving device. An opening is defined in the handle and a switch device is received in the opening with which a cover is engaged. A recess is defined in an outer periphery of the cover and a hole is defined through the cover. A pushing member is slidably engaged with the recess and a stepped protrusion extending from an underside of a first end of the pushing member is engaged with an inner periphery of the hole. A gap is defined between a second end of the pushing member and a surface defining the recess. An activation member is connected to the sliding member via the hole and has a convex contacting the switch device. A spring is connected between the cover and the activation member. The activation member shuts off the switch device when the sliding member is pulled by the spring by pushing the second end of the pushing member.

Abstract: A circular sawing machine having a hidden-type infrared guide device includes a main frame, a saw base pivotally mounted on the main frame, an infrared guide device, and an operation set. The infrared guide device is mounted on the saw base and includes a slide slidably mounted on the saw base, and an infrared indication lamp mounted on the slide. The slide is formed with an elongated slot. The operation set is mounted on the infrared guide device, and includes a drive plate, a movable pin, and an elastic plate. The movable pin is extended through the elongated slot of the slide and has a first end pivoted with the drive plate, and a second end combined with the elastic plate. The elastic plate is mounted on the movable pin and rested on the slide.

Abstract: A foldable worktable includes a tabletop and two H-shaped legs pivotally attached to a bottom of the tabletop to support the tabletop during use. Each leg has a first attachment member attached to hold the tabletop and the two legs in place to make the worktable stable when in use or folded.

Abstract: A miter saw. The saw includes a base on which a scale disk is connected and a bench is rotatably connected on the disk. An angle position device is connected to the bench. Notches are defined in an underside of the scale disk and the angle position device is engaged with one of the notches. A position member is movably connected to the body of the angle position device and a lever is connected to the position member which is pushed to contact a periphery of the scale disk to position the scale disk. A connection member is connected to the bench and a circular saw assembly is pivotally connected to the connection member. A handle on the circular saw assembly can be pulled out and rotated to adjust an angle thereof.

Abstract: An auxiliary bench is retractably connected to an underside of a main bench and includes two rods and a handle. The main bench has tow recesses defined in a peripheral flange thereof and the two rods are engaged with the two recesses. A retaining member is connected to an underside of the main bench by a lock member and has two grooves in which the two rods are movably received. The auxiliary bench is pulled to support long object to be drilled.

Abstract: A miter saw includes a base on which a scale disk is connected and a bench is rotatably connected on the disk. An angle position device is connected to the bench. A plurality of notches are defined in an underside of the scale disk and the angle position device is engaged with one of the notches. A position member is movably connected to the body of the angle position device and a lever is connected to the position member which is pushed to contact a periphery of the scale disk to position the scale disk. A connection member is connected to the bench and a circular saw assembly is pivotally connected to the connection member. A handle on the circular saw assembly can be pulled out and rotated to adjust an angle thereof.

Abstract: A quick press device for a table saw includes a handle connected to a miter gauge and a mediate member is pivotally connected to the other end of the handle. An arm pivotally received in the mediate member and a knob member is inserted into the arm. A spring is received in the arm and biases against the knob member. A shaft extends through the arm and the knob member wherein the hole in the knob member is larger than the hole of the arm. The shaft presses on the object when pushing the knob member to allow the shaft to be freely shifted in the hole of the knob member. The knob member is then released to be biased by the spring to securely position the shaft. A crank lifts an end of the arm to presses the shaft downward.

Abstract: A rechargeable power supply pack for hand tools includes a box having an adapter and a plurality of rechargeable batteries received in received therein. A recess is defined in a bottom of the box for two terminal plates pivotably received therein. Another recess is defined in a top of the box so that the tool is engaged with the recess and electrically connected to the contact port of the batteries.