A carpentry block is provided to support a remote end of a board or work piece to be cut with a table saw or chop saw. The block has a triangular body which can be positioned on any base to define three different heights to support the remote work piece end. The block can also be positioned on the one end to define a fourth height for work piece support. An extension member can be added to the block to provide additional heights with the block, the outer end of the work piece is level with the saw table, thereby assuring an accurate cut of the work piece by the saw blade.

An assistive device for heavy tool operation includes a rectangular frame and four legs extending from the corners of the frame. A tool base can extend through a slot in the frame. The tool base is configured to support a mechanical support arm and tool. A height and horizontal position of the tool base relative to the frame is adjustable. Each leg is connected to a wheel to allow the assistive device to travel with a user. The assistive device can support a majority, if not all, of the weight of an attached heavy tool and mechanical support arm, while allowing the user to operate the tool and adjust its position with minimal applied force.

An assistive device for heavy tool operation includes a rectangular frame and four legs extending from the corners of the frame. A tool base can extend through a slot in the frame. The tool base is configured to support a mechanical support arm and tool. A height and horizontal position of the tool base relative to the frame is adjustable. Each leg is connected to a wheel to allow the assistive device to travel with a user. The assistive device can support a majority, if not all, of the weight of an attached heavy tool and mechanical support arm, while allowing the user to operate the tool and adjust its position with minimal applied force.

A device for mounting a blank on a modular supporting system includes a first component fixing the supporting system to a supporting base plate and having a first main reference axis; a second component fixing the supporting system to a blank and having has a second main reference axis; and a rotary joint having a rotation axis that is transverse to both of the first and second main reference axes, and further having a first part that is fixed to the first component and that has a contoured pivoting portion to allow the rotation thereon of a second part, fixed to the second component, about the rotation axis, the rotary joint including a reversible element causing a stable locking between the first part and the second part in an angular position selected between a plurality of available angular positions.

A device for mounting a blank on a modular supporting system includes a first component fixing the supporting system to a supporting base plate and having a first main reference axis; a second component fixing the supporting system to a blank and having has a second main reference axis; and a rotary joint having a rotation axis that is transverse to both of the first and second main reference axes, and further having a first part that is fixed to the first component and that has a contoured pivoting portion to allow the rotation thereon of a second part, fixed to the second component, about the rotation axis, the rotary joint including a reversible element causing a stable locking between the first part and the second part in an angular position selected between a plurality of available angular positions.

A fixing structure includes a base, a supporting assembly coupled to the base, a top cover rotationally coupled to the supporting assembly, and a limiting assembly arranged on the supporting assembly. The limiting assembly limits a rotation angle of the top cover relative to the base.

A fixing structure includes a base, a supporting assembly coupled to the base, a top cover rotationally coupled to the supporting assembly, and a limiting assembly arranged on the supporting assembly. The limiting assembly limits a rotation angle of the top cover relative to the base.

A grinding machine for grinding tools comprises a support unit configured to support a tool to be ground and provided with members suitable to incline it by certain angle with respect to a horizontal reference plane; and an operating unit that is mobile along a main axis of development of the grinding machine in order to move with respect to the support unit and comprises an abrasive element intended to abrade at least a portion to be ground of the tool. The grinding machine comprises an adjustment system to adjust the inclination of the support unit with respect to the reference plane. The adjustment means system is mobile parallel to the main axis of development to move to a predetermined distance from the reference plane.

A grinding machine for grinding tools comprises a support unit configured to support a tool to be ground and provided with members suitable to incline it by certain angle with respect to a horizontal reference plane; and an operating unit that is mobile along a main axis of development of the grinding machine in order to move with respect to the support unit and comprises an abrasive element intended to abrade at least a portion to be ground of the tool. The grinding machine comprises an adjustment system to adjust the inclination of the support unit with respect to the reference plane. The adjustment means system is mobile parallel to the main axis of development to move to a predetermined distance from the reference plane.

An assembly which provides a rotating work surface extension. The assembly may be attached or fixed to an existing work space platform. An assembly comprising interchangeable rotating work surface extensions is disclosed, along with a system comprising such an assembly and a method of positioning a workpiece utilizing such an assembly.