A fence assembly for a table saw includes a primary fence including a first elongated body having a first body first side, a first body second side, a first body top side, and a first body bottom side, and a first height measured between the first body top side and the first body bottom side. A secondary fence is pivotally mounted to the primary fence and pivotable between a deployed position adjacent one of the first body first side or the first body second side, and a stowed position adjacent the other of the first body first side or the first body second side. The secondary fence includes a second elongated body having a second body top side and a second body bottom side, and a second height measured between the second body top side and the second body bottom side. The second height is less than the first height.

A fence assembly for a table saw includes a primary fence including a first elongated body having a first body first side, a first body second side, a first body top side, and a first body bottom side, and a first height measured between the first body top side and the first body bottom side. A secondary fence is pivotally mounted to the primary fence and pivotable between a deployed position adjacent one of the first body first side or the first body second side, and a stowed position adjacent the other of the first body first side or the first body second side. The secondary fence includes a second elongated body having a second body top side and a second body bottom side, and a second height measured between the second body top side and the second body bottom side. The second height is less than the first height.

A piston cylinder has a piston housing including a bore. A piston assembly is movable in the piston cylinder bore. The piston assembly includes a piston disk and a piston rod. A lock piston is movable in the piston cylinder. A lock plate is pivotally secured in the piston housing bore. The lock plate is contacted by the lock piston to move the lock plate into an unlocked position when fluid pressure is applied to the lock piston. A biasing mechanism is in contact with the lock plate. The biasing mechanism moves the lock plate into a locked position when fluid pressure is released or reduced on the lock piston.

A piston cylinder has a piston housing including a bore. A piston assembly is movable in the piston cylinder bore. The piston assembly includes a piston disk and a piston rod. A lock piston is movable in the piston cylinder. A lock plate is pivotally secured in the piston housing bore. The lock plate is contacted by the lock piston to move the lock plate into an unlocked position when fluid pressure is applied to the lock piston. A biasing mechanism is in contact with the lock plate. The biasing mechanism moves the lock plate into a locked position when fluid pressure is released or reduced on the lock piston.

A holder for clamping a tool includes a clamping mechanism for clamping the tool, and an exposed portion. The clamping mechanism is switchable between a clamping state and an unclamping state. The clamping state is a state in which removal of the tool from the holder is hindered. The unclamping state is a state in which removal of the tool from the holder is allowed. The exposed portion is exposed outside the holder and directly or indirectly and mechanically linked to the clamping mechanism. The exposed portion is pushed in one direction for movement to thereby switch the clamping mechanism to the unclamping state.

A holder for clamping a tool includes a clamping mechanism for clamping the tool, and an exposed portion. The clamping mechanism is switchable between a clamping state and an unclamping state. The clamping state is a state in which removal of the tool from the holder is hindered. The unclamping state is a state in which removal of the tool from the holder is allowed. The exposed portion is exposed outside the holder and directly or indirectly and mechanically linked to the clamping mechanism. The exposed portion is pushed in one direction for movement to thereby switch the clamping mechanism to the unclamping state.

Present invention relates to a rotary positioner that allows a welding table's work surface to be set at an angle as desired by a user. Two vertical frames can move and slide along the length of a chassis-bar to adjust the distance between the two vertical frames. As long as the length of a welding table does not exceed the total greatest distance between the two vertical frames, the present invention can fit any work table or welding table. Caster wheels and height adjustment knobs allow for easy movement and balancing of the rotary positioner.

Present invention relates to a rotary positioner that allows a welding table's work surface to be set at an angle as desired by a user. Two vertical frames can move and slide along the length of a chassis-bar to adjust the distance between the two vertical frames. As long as the length of a welding table does not exceed the total greatest distance between the two vertical frames, the present invention can fit any work table or welding table. Caster wheels and height adjustment knobs allow for easy movement and balancing of the rotary positioner.

A securing structure is provided, including a frame, a movable member, a fixed member, a first abutting member, a screwing member. The frame includes a passage. The movable member is slidably disposed in the passage, and includes a threaded portion and a guiding slot. The fixed member is affixed on the frame and extends through the guiding slot. The first abutting member has a first inclined surface and is pivotally connected to the movable member. The screwing member is detachably joined to the threaded portion.

A securing structure is provided, including a frame, a movable member, a fixed member, a first abutting member, a screwing member. The frame includes a passage. The movable member is slidably disposed in the passage, and includes a threaded portion and a guiding slot. The fixed member is affixed on the frame and extends through the guiding slot. The first abutting member has a first inclined surface and is pivotally connected to the movable member. The screwing member is detachably joined to the threaded portion.