A scribing wheel for scribing a brittle material-made substrate. A disc-shaped scribing-wheel base material in use is so designed that a mid-portion of a disc periphery has the largest diameter. A diamond film is formed on the periphery by a CVD method. The periphery is ground in the middle so that a plane including a circle defined by ridge line becomes perpendicular to the central axis of the scribing wheel.

Separator device applicable to manual ceramic cutters, which comprises: a tilting lever (2) and an actuation cam (3) provided with a cam profile (3) with a non-uniform variation in its radius of curvature and that provides a variable relationship between the rotation of the cam and the movement of the first end of the tilting lever, depending on the rotational position of the cam, in such a way that:—when the cam (3) rotates (β1) with a certain amplitude in an initial segment of its path, the first end of the tilting lever (2) completes a movement (d1) of a certain length; and—when the cam rotates (β2), with the same amplitude as β1, but in the final segment of its path, the first end of the tilting lever (2) completes a movement (d2) that is longer than the movement (d1).

A tile cutter having a base frame with a base plate and a guide which is disposed above the base plate and along which a slide carrying a cutting tool is displaceable in order to produce a score on the surface of a tile resting on the base plate, and having a breaker jaw device which is gear-coupled to the slide and is lowered onto the surface of the tile in the end phase of the displacement of the slide in order to break the tile along the score. The breaker jaw device and the slide interact with one another via a control flank arrangement in order to lower the breaker jaw device.

An apparatus for trimming stone and brick is disclosed. The apparatus is comprised of flat sections which radiate from a central axis. Each of the flat sections has two cutting edges, for a total six cutting edges. In use, the apparatus is placed onto a supportive platform so two of the flat sections contact the platform, while the third extends up and is an apical striking platform. The mason holds a stone or brick so it rests on one of the cutting edges of the apical striking platform and strikes the top face of the stone or brick with a hammer, approximately over where the stone or brick contacts the edge of the trimmer. In addition to providing a cutting surface, the subject matter of this application reduces errant vibration caused by the striking which can result in irregular cutting.

Disclosed is a tool including: first and second members that respectively define: first and second forward ends; first and second bodies that extend along respective first and second elongate axises to first and second aft ends, wherein the first and second forward ends are pivotally connected to a pivot member, whereby the first and second members are configured to pivot about a pivot axis, so that the first and second aft ends move toward and away from each other; and a third member that defines a first transverse end and a third body that extends along a third elongate axis to a second transverse end, wherein: a first slide lock is fixed to the first transverse end of the third member and is operationally connected to the first member; and a second slide lock is operationally connected to the second member and the third member.

Disclosed is a manual ceramics cutter with detachable accessories, comprising: a base (1) for supporting a ceramic piece to be cut; a manually actuatable cutting head (2); guides (3) for moving the cutting head; and at least one detachable accessory (4a, 4b) for laterally supporting the ceramic piece to be cut and which is provided with fastening means (41) for fastening to the base (1) in an operative use position in which the detachable accessory (4a, 4b) is arranged transversely with respect to the base (1) and projects laterally from the base (1). The cutter comprises magnetic means (11, 42) for fastening the detachable accessory (4a, 4b) to the base of the cutter in an inoperative or transport position, wherein the accessory (4a, 4b) is arranged in a longitudinal direction on the base (1) and does not project practically from the base.

A manual ceramic cutter with an adjustable set-square, having a set-square (1) installed at one of the longitudinal extremities of a base (2) for supporting the ceramic items to be cut, and a manually-operated cutting head (3) installed with the possibility of displacement along a number of longitudinal guides (4). This cutter comprises adjustment means (13, 14) of the perpendicularity of the set-square (1) with regard to a cutting line (L1) of the cutter, and fixing means (11, 12) of the set-square (1) to the base (2). It further comprises visual verification means of the perpendicularity of the set-square (1) with regard to the cutting line (L1).

The invention relates to a rotary blade assembly that can be used in tile-cutting machines, which has an annular blade (1) mounted on a bearing (2) comprising an inner race (21), and outer race (22) and ball bearings (23). A first side of the outer race (22) comprises a perimeter projection (24) that forms a stop for mounting the blade (1) on the bearing. A securing ring (3) that forms a second stop for mounting the blade (1) is mounted and secured on the second side of the outer race (22), the bearing and/or the securing ring comprising projections or recesses (31, 25, 26) which are coupled to complementary recesses or projections (11, 12) defined in the blade and which prevent the relative rotation of the blade (1) with respect to the securing ring (3) and the outer race (22) of the bearing (2).

The invention relates to a manual long-length ceramic cutter, comprising: a supporting base (1) for the piece to be cut; at least one longitudinal guide (2, 2a, 2b) installed above the base (1); and a head (3) for scoring and separating the ceramic pieces, operable manually and installed on at least one guide (2, 2a, 2b) that can move longitudinally. The cutter comprises at least one mobile support (4, 4a, 4b), having: an upper end (41) installed on the respective longitudinal guide (2, 2a, 2b), and a lower end (42) installed on at least one longitudinal track (11a, 11b) of the base (1), wherein said support can move longitudinally along the guide (2, 2a, 2b) and the corresponding track (11a, 11b), preventing the guide (2, 2a, 2b) from bending during the scoring and separation of short-length ceramic pieces.

To cut or score straight lines along sheet materials such as drywall panels, insulation boards, and timber sheets, it is commonly known to use a guide rail. Guide rail attachment means include screws, clamps, and/or adhesive pads. These securing means are time consuming to implement, and can cause damage to a main face of the sheet material. The present invention provides a guide rail securing device for releasably securing a guide rail 100 to a sheet material 200, comprising a guide rail attachment mechanism, and at least one penetrating element 20 to secure the guide rail securing device to the sheet material 200 by penetrating an edge of the sheet material 200. In this way, once the guide rail securing device is securely attached to the guide rail, a user may instantly connect the guide rail to the sheet material by penetrating an edge of the sheet material with the penetrating element.