Hand tool for cleaning mastic from tile spacing lines

Abstract

The invention is hand tool and methods of use therefor for removing excess mastic and other debris from spacing between tiles. The device has a polygonal body, with a single projection extending from each side. Each projection has a different width and/or length, and is sized to fit in the spacing between adjacent tiles. Methods of installing and/or renovating and/or repairing tile with the hand tool are also disclosed.

Claims

1. A hand tool for cleaning mastic from grout lines of tile, the hand tool comprising: a main body comprising a substantially flat polygon defined by a substantially planar top and bottom surface and a plurality of substantially straight and flat sides about the periphery thereof, each of the sides extending between a respective pair of corners at the periphery of the body; a plurality of projections integrally formed with the main body, wherein a single one of the projections extends from a respective one of the sides of the body, each of the projections being substantially rectangular in shape with each projection having a width that is different than the other projections, a top and bottom of each projection being substantially coplanar with the respective top and bottom surfaces of the main body, each of the projections further having a substantially flat distal end spaced from the respective flat side of the main body, each projection distal end and the associated flat side of the main body being beveled so as to define an angle relative to the top surface of the main body, the bevel of each projection distal end and the respective flat side of the main body being substantially equal such that they define substantially parallel surfaces; and wherein the main body and integral projections are formed as a unitary piece and the main body and projections are formed of a material having degree of flexibility having a Shore hardness from A55 to D50.

2. The hand tool of claim 1, wherein the main body comprising the substantially flat polygon further comprises a substantially triangular shape, wherein the plurality of substantially straight and flat sides consists of three sides.

3. The hand tool of claim 1, wherein the main body comprising the substantially flat polygon further comprises a substantially rectangular shape, wherein the plurality of substantially straight and flat sides consists of four sides.

4. The hand tool of claim 3, wherein the main body comprising the substantially flat polygon further comprises a substantially square shape, wherein the plurality of substantially straight and flat sides consists of four sides.

5. The hand tool of claim 1, wherein the main body comprising the substantially flat polygon has a thickness which is substantially uniform across the main body and the plurality of projections.

6. The hand tool of claim 5, wherein the thickness is in the range from to inch.

7. The hand tool of claim 6, wherein the hand tool main body has a maximum width of between 2 and 4 inches.

8. The hand tool of claim 1, wherein each side is at an angle of 80 to 87 degrees or 93 to 110 degrees from the top of the hand tool.

9. The device of claim 1, wherein the material comprises rubber, neoprene, or polyurethane.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIGS. 1A-1D depict top, side, (side (close-up), and side (close-up) views, respectively, of a hand tool according to an embodiment of the invention;

(2) FIGS. 2A-2B depict front (cross-section) and front (cross-section) views of a tile assembly for use with the current invention;

(3) FIGS. 3A-3C depict front (partial cross-section), front (close-up, partial cross-section), and side (partial cross-section) views, respectively, of a hand tool removing mastic from a tile seam according to an embodiment of the invention;

(4) FIG. 4 depicts a front (cross-sectional) view of a tile assembly with a seam trough formed according to an embodiment of the invention;

(5) FIG. 5 depicts a front (cross-sectional) view of a tile assembly with grout applied to a seam trough formed according to an embodiment of the invention.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

(6) As depicted in FIGS. 1A-1B, a hand tool 10 according to an embodiment of the invention includes a main body 12 having a length 14, width 16, and thickness 18. In the particular embodiment depicted, the length 14 and width 16 are substantially equal, with the main body 12 forming a substantially square shape. The corners 20 of the main body in the embodiment depicted are rounded, although unrounded corners are also within the scope of the invention.

(7) Various dimensions are within the scope of the invention. Examples of dimensions of preferred embodiments include thicknesses of 1/32 to 1 inch, 1/16 to inch, to inch, and/or about inch. Widths/lengths of preferred embodiments may be between 1 and 5 inches, between 2 and 4 inches, and/or about 3 inches. While a substantially square-shaped main body 12 is depicted, other multi-sided shapes are also within the scope of the invention, including non-square rectangles (i.e., with length unequal to width), triangle, pentagon, and other polygonal shapes. The particular dimensions for a specific hand tool according to the invention may depend on the particular application, including aspects such as the materials forming the hand tool 10, etc.

(8) In the particular embodiment depicted, the hand tool 10 has four sides 22a-22d. Extending from the middles of each side 22a-22d are projections 24a-24d. In the particular embodiment depicted, the projections have the same thickness 18 as the main body 12, although other thicknesses are also within the scope of the invention. Each projection may have a different width 26a-26d from the other projections. In a preferred embodiment, projection widths include about 1/16 inches (for 26a), about 1/18 inches (for 26b), about 3/16 inches (for 26c), and about inches (for 26d). Each projection 24a-24d has a length 28a-28d. The lengths 28a-28d of different projections may be equal, or may be different. In one embodiment, all projections 24a-24d have identical lengths 28a-28d. Examples of ranges for lengths 28a-28d according to preferred embodiments include between 1/16 and inch, between and inch, and/or about 3/16 inch. In one particular embodiment of the invention, the main body 12 is square with a width and length of about 3 inches; all projections have a length of about 3/16 inches; projection widths include about 1/16 inches (for 26a), about 1/18 inches (for 26b), about 3/16 inches (for 26c), and about inches (for 26d); and the device (including main body and projections) has a thickness of about inch. In the embodiment depicted, each projection 24a-24d forms a rectangular shape extending from the main body 12.

(9) As seen in FIG. 1C, a hand tool 10 according to an embodiment of the invention may have one or more (or all) sides 22b which are at angles 34, 36 of 90 degrees from the upper and lower surfaces 30, 32 of the hand tool. As seen in FIG. 1D, a hand tool 10 according to an embodiment of the invention may have one or more (or all) sides 22b which are at angles 34, 36 which depart from 90 degrees from the upper and lower surfaces 30, 32 of the hand tool. For example, an angle 34 may be 80 to 87 degrees to provide a slightly sharper point on the upper edge formed between side 22b and surface 30. Similarly, an angle 36 may be 93 to 110 degrees to provide a slightly less sharp edge between side 22b and surface 32. A user could select which edge to use (e.g., more sharp or less sharp) depending on the particular mastic, tile, etc. Note that similar angles and ranges may be provided to one or more or all of the projections (e.g., 24b).

(10) Various materials may be used to form devices of the invention. For example, a device according to the invention may be formed as a unitary piece, such as from a molded rubber or thermoplastic block which may be formed via a single-pour molding process. Materials may include rubber, neoprene, and/or polyurethane or other polymers having sufficient flex to act in squeegee-like fashion. The resulting structure should not be entirely stiff/rigid, but should have sufficient flexibility so that the hand tool edges can engage the tile surface in a squeegee-like fashion without scratching the surface of the tile. Examples of materials for use for the hand tool include materials, such as polyurethanes, having shore hardness from A55 to D50.

(11) Methods of using the device during installation of tile for removal of excess mastic are depicted in FIGS. 2A-2B and 3A-3C. In FIG. 2A, tiles 40 have been lightly applied to a subsurface 42 via mastic 44. The tiles, which have a thickness 46, have adjacent edges 48 which are spaced apart by a seam 50 having a width 52. As depicted in FIG. 2B, after the tiles 40 are pressed firmly down to seat/adhere their lower surfaces 54 into the mastic 44, excess mastic 44a is forced up through the seam 50 (and therefore between adjacent tile edges 48) and over a portion of the top surface(s) 56 of the tiles 40.

(12) Prior to the mastic 44 drying, the user compares the seam width 52 against the widths of the projections 24a-24d of the device 10, and selects the projection (e.g., projection 24d) having the width that most closely fits into the seam 50. As depicted in FIG. 3A, the user places the hand tool side 22c against the tiles top surfaces 56, with the projection 24c extending into the seam 50 to a depth 58 well below the tiles top surfaces 56, but which may not be so deep as to reach the tiles lower surfaces 54. The sides 22a-22d of the hand tool 10 are flat and substantially straight to either side of the center projection of that particular side (i.e., are flat and substantially flat all the way from the projection to the near corner defining the end of that side), and also have some flex due to the material from which they are formed, and thus present flat squeegee-type surfaces 60 against the tile top surfaces 56 on either side of the seam 50. The flat squeegee-style surfaces 60 of the side(s) are thus suitable for removing excess mastic in squeegee fashion from the top surfaces 56 of the tiles 40. As depicted more clearly in the close-up view of FIG. 3B, the rectangular shape of the projection 24d of the selected side is particular suitable for extending well into a selected tile seam 50, with the tip 62 of the projection positioned well below the tile top surfaces, and the sides 64 of the projection 24d (when the selected projection is properly matched to the seam width) engaging against adjacent tile edges 48 on either side of the seam 50.

(13) As depicted in FIG. 3C, with the projection 24d positioned in the seam 50, the user can draw the hand tool 10 in a desired direction 70 with the selected side 22d engaging along the tile top surface 56, with the side 22d serving to remove, in squeegee fashion, the excess mastic 44a from the tile top surface 56. Simultaneously, the projection 24d is drawn through the seam 50 to remove excess mastic 44a therefrom and thereby form a deep rectangular trough in the seam 50. The user can hold the hand tool 10 with the main body 12 held at an angle 72 from the tile top surface 56 with respect to the tile top surface 56 as the device 10 is drawn across the tile in order to improve the mastic removal, and/or to achieve a desired depth of the resulting seam trough. Such an angle 72 may be between 30 and 90 degrees; about 45 degrees; about 60 degrees; just under 90 degrees; between 60 and 90 degrees; etc. The device 10 thus uses its projection 24d to smoothly clean out the excess mastic or other material in the tile spacing, leaving behind a trough between the tiles of sufficient depth in which grout can be firmly seated, while the flat side 22d flat surfaces 60 on either side of the projection 24c firmly engage against the tiles top surfaces 56 to clean (in squeegee fashion) the excess mastic 44a therefrom. As can be seen in the area cleaned of mastic by the device 10 (which is the left of the device 10 in FIG. 3C), a trough 74 is formed in the seam 50 to a depth 76 below the tile top surface 56, while in the area that has not yet been cleaned of mastic (i.e., through which the device has not yet passed, which is to the right of the device 10) the excess mastic 44a still extends up and over the tile top surface 56. After the device 10 has cleaned the seam 50 of excess mastic 44a, the result is a relatively deep rectangular trough 74 in the tile seam 50 that can securely receive and hold tile grout. Note that it may be desirable for the trough 74 to be deeper than it is wide to assist in securing the grout firmly into the seam.

(14) FIG. 4 depicts the seam trough 74 formed by the hand tool 10 in the tile seam 50. The seam trough 74 is substantially rectangular in shape, and extends substantially the entire width 52 of the seam between the tiles 40, with the trough depth 76 sufficient to receive and seat grout to be applied after the mastic has set. The remaining mastic 44 when set will secure the tiles 40 securely to the subsurface 42 and to adjacent tiles 40. Note that some additional cleaning of excess mastic via other tools (e.g., sponges, squeegees, etc.) may be used in addition to the use of the hand tool 10 of the invention, such as being used after, or in between, hand tool use to clean fine mastic particles that may remain on the tile top surfaces 56.

(15) FIG. 5 depicts the seam 50 with grout 80 added into the seam trough 74 between the tiles 40. Typically the grout 80 is added after the mastic 44 is set, with the grout 80 typically providing a water-tight seal and/or relatively smooth upper surface to the area between the tiles 40. Note that the grout is typically applied to leave only a relatively shallow portion of the seam exposed, so that dirt and other debris cannot easily collect in large amounts in the seam. Such grout can be added using conventionally known methods.

(16) Although the invention has been described in terms of particular embodiments and applications, one of ordinary skill in the art, in light of this teaching, can generate additional embodiments and modifications without departing from the spirit of or exceeding the scope of the claimed invention. For example, although the above devices and methods are described for use in a particular manner, the devices and methods described herein could be used in a variety of different methods of use. Accordingly, it is to be understood that the drawings and descriptions of specific embodiments herein are proffered by way of example to facilitate comprehension of the invention, and should not be construed to limit the scope thereof.