Patent Grant
7421829
The present application relates to a drywall panel installation tool and specifically to a drywall installation tool for installing drywall so as to form a curved wall surface or a curved ceiling surface and to a method for attaching a drywall panel to form a curved wall surface or a curved ceiling surface.
Drywall, otherwise known as wallboard, gypsum board or sheetrock, has long been used as an established construction material as an alternative to plaster walls or ceilings.
Modern architecture often incorporates curved wall or ceiling surfaces. Such surfaces may be either convex or concave curves and may be formed as an arc or a surface having a defined radius, either internal or external.
Drywall panels typically come in 4 foot by 8-foot sheets, and sometimes 4 foot by 12-foot sheets. These sheets are large, heavy and cumbersome.
Typically when constructing a curved wall surface, studs are put in place on 16 inch centers and the drywall panel is then thoroughly wetted and once wetted is placed against a first stud with its long edges extending horizontally and its short edges vertically and then fastened to that first stud. The panel is then serially forced against the remaining studs and fastened to each sequentially, until the last, or trailing, stud, is reached.
Because the flexibility of the panel decreases as one approaches the last stud forming the curved surface, it becomes very difficult to fasten the drywall panel to the last few studs. This is usually done by manually forcing the panel against the last stud and then applying fasteners. Frequently in this operation, because of its lack of flexibility, the drywall panel will crack, which is very undesirable because this will result in a discontinuity in the curved surface which must then be corrected by extensive sanding and patching with joint compound. Another problem is that the fasteners attaching the drywall panel to the last stud may pull through the panel as a result of the tension created by the curved panel. Installation of a drywall panel to a curved surface in this manner typically requires two or more people, one or more who attempt to maintain a flush relationship between the panel surface and the studs and another who performs the fastening operation. If the surface is a concave surface having an internal radius, three or more people may be required.
U.S. Pat. No. 4,709,460 to Luhowyj describes and illustrates a tool and method of using the tool to support and guide panels so that they may be easily and safely placed for installation. The tool is attached to an edge of an adjacent panel by fastening it by, for example, a drywall nail. The panel is then provided a guide to be joined in an abutting relationship, and is then fastened to the underlying frame. This method, when using two or more of these tools described, is useful especially for installation of panels on a ceiling. No provision is made for curved surfaces.
U.S. Pat. No. 4,158,455 to Brown and U.S. Pat. No. 4,658,113 to Lazo describe and illustrate a wall panel installation jig for holding the panels during installation so as to enable installation by a single installer. Use of the jig requires its temporary attachment by nails or the like to the wall studs to restrain the panel while it is installed, and subsequent removal of the jig for use on adjacent panels. Lazo further includes integral levelers and provides guides or slots for indicating where the fasteners should be inserted in corresponding relationship with the studs.
U.S. Pat. No. 5,254,945 describes a similar installation tool having the advantage of being easily removable, that is without removing the fasteners, after the wall panel has been fastened to the framing members.
One object of the present invention is to provide a tool for assisting in installation of drywall panels to form a curved surface, which reduces the manual effort required and which overcomes the problems noted above.
The present invention provides a drywall installation tool comprising an elongated plate having one straight edge adapted to be placed adjacent the edge of a sheet or panel of drywall, a series of holes in the elongated plate being spaced approximately equally from said straight edge, whereby when the flat plate is placed against a drywall panel with the straight edge thereof aligned with the edge of the drywall panel, fasteners may be inserted through the holes in the plate to attach the drywall panel to an underlying framework of spaced studs.
The present invention also provides a method of attaching a drywall panel to a series of studs or rafters aligned in a curve on 16 inch centers comprising attaching one edge of the drywall panel to a first stud or rafter of the series of studs or rafters, attaching the drywall sheet serially to each of the next studs or rafters until all but two or three of the studs or rafters of the series of studs or rafters remain unattached to the drywall panel, using the inventive drywall installation tool to push and retain the drywall panel against the remaining two or three unattached studs or rafters, and fastening the drywall panel to the last two or three studs or rafters with the last stud or rafter being attached to the drywall panel by inserting fasteners through the holes in the drywall installation tool provided for this purpose.
This invention will be better understood as set forth in the following description, with reference to the drawings, in which
Referring now to
From the other side of the flat plate 11, a surface 14 extends in the opposite direction. The surface 14 serves to rigidify the plate 11 and may provide an integral handle, such as the slot 15 shown in
Preferably the tool has a length corresponding to the width of the gypsum board panel, usually four feet, so as to span the full width of the panel edge and thereby provide a bending force as to the full width of the edge. However, the length of the drywall installation tool 10 may be varied depending on requirements; for example, it may be shorter to avoid excessive weight, as shown in
The drywall installation tool 10 is preferably made of aluminum. Preferably the flat plate 11, flange 13, and surface 14 are integrally formed, but they could be formed separately and attached to each other by welding or other means. Preferably the surface 14 has opposite outwardly concave surfaces shown at 15a and 15b in
As shown in the detail view in
As shown in the cross-sectional view of
In the method according to the present invention of using the tool, wall studs or ceiling rafters are set at 16-inch centers. The drywall panel is then placed with one end edge in contact with a first or leading stud 18 and the panel is then attached to stud 18 with a series of fasteners inserted at the distal edge of the panel. The drywall panel is then forced into contact with a second or intermediate stud 19 next to the first stud 18 and is attached to the second stud 19 with a series of fasteners. This process continues for fastening to the intermediate studs 19 until the drywall panel has been attached to all but the last one or two intermediate studs 19 and the last stud 20 as shown in
At this time, the drywall installation tool 10 is used to retain the edge 32 of the drywall panel 30 against the last stud 20. One or more clamping devices, such as a bar clamp 16, may be used to clamp the installation tool and drywall panel 30 to the last stud. Preferably clamps are used at the top and bottom of the drywall panel 30, but the clamp ends come into contact only with the stud 20 and the flat plate 11 of the drywall panel installation tool 10, so as to avoid damage to the edge 32 of drywall panel 30. Fasteners are then applied to attach the drywall panel 30 to the last two or three studs 19, 20, with the fasteners attaching the drywall panel to the last stud 20 being applied through the holes 12 disposed in the drywall installation tool 10 adjacent the edge 32.
The drywall installation tool 10 shown in
The installation tool provides the benefit of avoiding improper installation, so as to avoid fastener pull through, edge core fissures and fracturing, and possible improper alignment of the edge 32 of a panel 20 relative to the final stud 20. Using the installation tool 10 in accordance with the present invention essentially eliminates such problems in that the load applied to the trailing edge 32 of the drywall panel 30 is even across a major portion of the width of the panel, and thus eliminates stresses that are forced on the edge of a panel as the fasteners are applied. Moreover, use of the tool permits a single user, when provided with appropriate tools, to install the panels on a curved surface efficiently, and without requiring assistants to hold down the edge of a panel during the installation process. The curved surface can thus be created by one laborer without requiring pre-soaking of a board manufactured from appropriate materials, that is flexible enough to withstand bending or curving so as to enable installation without cracking of the drywall panel, for example, of a board of the type described in commonly owned U.S. Pat. No. 6,524,679, or such boards manufactured by Certain Teed Gypsum, Inc., of Tampa, Fla., in accordance with the teachings therein, and available under the name GlasRoc®.
For installation of an internal radius curved surface, the installation procedure is essentially the same except that force must be applied to the panel edge both in the normal direction, that is in the direction toward the stud, but also in the direction of the curve, so as to maintain flush contact between the studs and the adjacent surface of the drywall panel. To facilitate the concave curvature of an internal radius curved wall or ceiling surface, it may be necessary to depress the center section of the panel toward the frame of studs before applying the longitudinal force against the panel edge. Thus, when a longitudinal pressure force is applied by the installation tool, the drywall panel is more apt to bend to conform with the configuration of the frame defined by the studs.
When the curved surface is a ceiling surface, the procedure is also essentially the same. Ceiling rafters are set at 16-inch centers with their outer edges defining a curve. The drywall is then fastened to a first rafter and subsequently to an adjacent rafter and so on until the drywall panel is attached to all but the last two or three rafters. The installation tool is then used to bring the board into contact with the last two or three rafters and the fasteners are applied, much as on a frame of vertically aligned studs as described above.
Although the preferable material has been described above as comprising aluminum, so as to maintain costs to a reasonable level, while reducing the weight of the tool 10 as much as possible, other materials may also be used. Any appropriate metal alloy or even composite material is a good candidate for fabrication of tool 10, as long as it will resist longitudinal flexing and undue wear, that is, any material that is lightweight and rigid enough to meet the above described considerations. The surface of the tool 10 may also be finished by an appropriate means, such as powder coating, anodizing, etching, texturing or a combination of these. Scoring at regular intervals along the edge may also provide the secondary function of a length-measuring device, such as a ruler.
Other appropriate modifications are also contemplated, for example the length of the tool 10 may be varied to meet the expected widths of the drywall panels for which its use is intended. Similarly, appropriate spacing intervals between adjacent apertures or the diameters or number thereof, has been set forth above, but more appropriate intervals and characteristics may also be used for varying purposes, as desired.
Other modifications, alterations or variants may be utilized by those having ordinary skill, for example, by utilizing some other retention mechanism other than a bar clamp, as described above, to retain the inventive drywall panel installation tool against the edge of a dry wall panel, without deporting from the scope of the present invention. Thus, the above embodiments are to be considered as being illustrative only, the invention being limited only by the following claims.
| Number | Name | Date | Kind |
|---|---|---|---|
| 1016383 | Wellman | Feb 1912 | A |
| 1048333 | Mishler | Dec 1912 | A |
| 2911022 | Brown | Nov 1959 | A |
| 3738690 | White | Jun 1973 | A |
| 3904380 | Smith | Sep 1975 | A |
| 4158455 | Brown | Jun 1979 | A |
| 4254945 | Paulson et al. | Mar 1981 | A |
| 4443950 | Cockeram | Apr 1984 | A |
| 4584775 | Boman | Apr 1986 | A |
| 4709460 | Luhowyj | Dec 1987 | A |
| 4930225 | Phillips | Jun 1990 | A |
| D317575 | Ramsey | Jun 1991 | S |
| 5407183 | Singeltary | Apr 1995 | A |
| D362812 | Meyer | Oct 1995 | S |
| 5524410 | Menchetti | Jun 1996 | A |
| 5658113 | Lazo | Aug 1997 | A |
| 5794998 | Lapierre | Aug 1998 | A |
| 5855073 | Boelling | Jan 1999 | A |
| 5884447 | Earp | Mar 1999 | A |
| 6131361 | Murphy | Oct 2000 | A |
| 6161824 | Gustavson | Dec 2000 | A |
| 6185824 | McClure et al. | Feb 2001 | B1 |
| 6230469 | Santa Cruz et al. | May 2001 | B1 |
| 6272758 | Wheeler | Aug 2001 | B1 |
| 6292997 | Ollendick et al. | Sep 2001 | B1 |
| 6293058 | Sink | Sep 2001 | B1 |
| 6327786 | Felix | Dec 2001 | B1 |
| 6364303 | Gustavson | Apr 2002 | B1 |
| 6412185 | Mills et al. | Jul 2002 | B1 |
| 6420014 | Hartman | Jul 2002 | B1 |
| 6430888 | Dombchik et al. | Aug 2002 | B1 |
| 6467236 | Schlegel | Oct 2002 | B1 |
| 6523272 | Morales | Feb 2003 | B1 |
| 6578279 | Moon | Jun 2003 | B1 |
| 6615564 | Lutrario et al. | Sep 2003 | B2 |
| 6622394 | Werner et al. | Sep 2003 | B2 |
| 6757983 | Moon | Jul 2004 | B1 |
| 6886268 | Morse | May 2005 | B1 |
| 6904732 | Richmond | Jun 2005 | B1 |
| 6918187 | Schaefer | Jul 2005 | B2 |
| 6964111 | Duffield | Nov 2005 | B1 |
| 7316078 | Hagman | Jan 2008 | B2 |
| 20010029673 | Brown et al. | Oct 2001 | A1 |
| 20030070310 | Werner et al. | Apr 2003 | A1 |
| 20050055978 | Visser | Mar 2005 | A1 |
| 20050102965 | Alfis, III | May 2005 | A1 |
| 20060174504 | Szumer et al. | Aug 2006 | A1 |
| 20060265895 | Daugherty | Nov 2006 | A1 |
| 20080053036 | Graham | Mar 2008 | A1 |
| Number | Date | Country | |
|---|---|---|---|
| 20060053722 A1 | Mar 2006 | US |
