The present invention provides a system 10 for construction of formwork where a settable compound is pourable into a cavity in the formwork and retained by the formwork to set to form a completed structure. The formwork comprises structural panels 12, 14 connected by adjustable connectors 34 for varying the spacing between the panels.

An adjustable mold capable of making castings of various configuration is provided. The adjustable mold has an adjustable die with a core and an adapter, a protrusion, a cavity, and an outer portion with at least two sidewalls, at least two endwalls, and a base therebetween, which outer portion at least partially surrounds the adjustable die to thereby define a mold. During casting, molding material is poured in the mold and allowed to cure to make a casting. The adapter is replaceable to enable castings of multiple configurations to be cast suing the adjustable mold.

A void former is arranged in a mold (30). The void former includes an insert (1) made of flexible material that forms a loop around a core region (15) within the mold. Casting material is added in a fluid state into the mold so as to fill a predefined volume for the facing element, including the core region. After hardening of the casting material, the facing element (10) is removed from the mold, and the void former is removed from the facing element. The facing element comprises an anchoring core formed by the hardened casting material in the core region (15). Removing the void former comprises pulling the insert (1) away from a rear surface of the facing element (10). The flexible material of the at least one insert is deformed around the anchoring core (15) while it is pulled.

A post sleeve provides a substantially permanent base for supporting a post for a fence or sign, and from which one post can be removed and replaced with another post. The sleeve includes a concrete body that is poured on site, using a sleeve core prepositioned in the post hole, and around which wet concrete is poured. After the concrete is cured, the core is removed, leaving a post sleeve cavity configured to receive a post. The core can be rigid, or can include a flexible shell and stiffener. A preformed post sleeve top can be attached to the sleeve core and positioned therewith in the post hole, to become a permanent part of the post sleeve, once the concrete cures. A drain is attached to the core, and remains in the sleeve when the core is removed, and can be a percolation chamber, or passage extending below the sleeve.

A formwork core for a formwork system for concreting a bell body including a base frame and two corner supports detachably fastened at a variable distance. The corner supports each bear two corner connection panels, which are arranged at a right angle to each other around the corner and can be synchronously retracted and extended without touching each other. The corner supports also bear corner angle pieces, which likewise can be retracted and extended and, in the completely extended state, close the gap between the two associated corner connection panels in order to form a vertical outer shell of the formwork core. The vertical edges of the corner connection panels, which vertical edges are distant from the corner, have screw flanges facing inward. Optionally, at least one side formwork panel can be inserted between the corner connection panels one side.

A formwork core for a formwork system for concreting a bell body including a base frame and two corner supports detachably fastened at a variable distance. The corner supports each bear two corner connection panels, which are arranged at a right angle to each other around the corner and can be synchronously retracted and extended without touching each other. The corner supports also bear corner angle pieces, which likewise can be retracted and extended and, in the completely extended state, close the gap between the two associated corner connection panels in order to form a vertical outer shell of the formwork core. The vertical edges of the corner connection panels, which vertical edges are distant from the corner, have screw flanges facing inward. Optionally, at least one side formwork panel can be inserted between the corner connection panels one side.

A void former is arranged in a mold (30). The void former includes an insert (1) made of flexible material that forms a loop around a core region (15) within the mold. Casting material is added in a fluid state into the mold so as to fill a predefined volume for the facing element, including the core region. After hardening of the casting material, the facing element (10) is removed from the mold, and the void former is removed from the facing element. The facing element comprises an anchoring core formed by the hardened casting material in the core region (15). Removing the void former comprises pulling the insert (1) away from a rear surface of the facing element (10). The flexible material of the at least one insert is deformed around the anchoring core (15) while it is pulled.

The invention relates to a corner shuttering element with two limbs (12, 14) arranged at an angle to each other, on the outer edge of which limbs (12, 14), edge strips (16, 18) are arranged that can be retracted and extended by means of articulated levers (24, 26), wherein the edge strips (16, 18) can each be aligned and fixed in their position by means of a plurality of locking elements (34) arranged distributed over the height of the corner shuttering element, and wherein the locking elements (34) are arranged on guides (32) for pull-out webs (30) of the edge strips (16, 18).

An arthroscopic or other surgical cutter has features which facilitate fabrication by ceramic molding. The arthroscopic cutter includes a cutter body having a longitudinal axis and a window, an interior channel, and a plurality of cutting edges extending radially outwardly from an outer surface thereof. The features include non-helical, longitudinally aligned cutting edges, controlled thicknesses of the cutting edges, controlled heights of the cutting edges, controlled areas of the windows, controlled diameters of the internal channels, controlled rake angles of the cutting edges, and other parameters.

An arthroscopic or other surgical cutter has features which facilitate fabrication by ceramic molding. The arthroscopic cutter includes a cutter body having a longitudinal axis and a window, an interior channel, and a plurality of cutting edges extending radially outwardly from an outer surface thereof. The features include non-helical, longitudinally aligned cutting edges, controlled thicknesses of the cutting edges, controlled heights of the cutting edges, controlled areas of the windows, controlled diameters of the internal channels, controlled rake angles of the cutting edges, and other parameters.