Building Apparatus and Method
AssigneeAngela DUFFY
InventorAndrew Lundie
Life of this patent
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Abstract
A method of forming an opening in an existing brick wall comprises inserting at least one expandable element in the course of bricks above the top of the intended opening, to and expanding the element or elements to exert a horizontal force in the course of bricks. The tool comprises a pair of parallel pressure plates, a cam element between the plates, ratchet lever means for rotating the cam element, and ratchet and pawl means for latching the cam element. Expansion plates maybe used for wide joints.
Claims11
A method of forming an opening in an existing brick wall, comprising inserting at least one expandable element in the course of bricks above the top of the intended opening, and expanding the element or elements.
A joint expansion tool element for use in forming an opening in an existing brick wall by insertion between an adjacent pair of bricks, the tool comprising a pair of parallel pressure plates, a cam element between the plates, means for rotating the cam element, and latching means for latching the cam element.
Any feature of novelty or combination thereof within the meaning of Article 4H of the International Convention (Paris Convention).
Dependencies are inferred from the claim text.