WO 2008/098378 PCT/CA2008/000309 STAND APPARATUS Field of the Invention The present invention relates to apparatuses used to mount computer monitors, TV 5 displays, and the like. The present invention relates more particularly to apparatuses used to mount flat screen displays. Background of the Invention For computer monitors, TV displays, and the like, it is preferable that the user is able 10 to adjust the monitor, display, etc., in both up and down (or vertically) tilt and right to left (or horizontal swivel direction to allow a given user to fix the monitor in a viewing position that suits them. There has been a multitude of stand apparatus devised and disclosed in this regard. In particular, stand apparatuses in this field capable of tilting and rotating are well 15 known. For example, U.S. Patent No. 6,116,560 issued to Kim discloses a monitor stand having a bottom stand unit with a concave socket and a stand display interface with a convex ball portion. This stand is not adapted for a flat screen and it provides a limited range of motion. U.S. Patent No. 5,588,625 issued to Beak also provides a monitor stand for a 20 conventional monitor, and includes similar complementary concave portions that provide the tilt mechanism. Furthermore, U.S. Patent No. 5,398,903 issued to Cho discloses a video display mounting device in which swivelling and tilting can be adjusted by the user. Unfortunately, this patent also suffers from limited range of motion, and it does not 25 prevent lateral movement, which may be undesirable for the user. Another tilt and swivel device was disclosed by Han in U.S. Patent No. 6,007,038. This apparatus includes a tilt member, a swivel member and a base member, and WO 2008/098378 PCT/CA2008/000309 -2 movement is controlled with remote controller. Unfortunately, this device is relatively complex. Recent improvements in display technology have seen the interest in flat display devices increase as the costs of some of these technologies have come down to an 5 affordable level. In particular, there has been an increasing demand for thin and lightweight screens for TV (including high definition) and outside displays, as well as for high-resolution flat computer monitors that are robust and use little power. Although there are several competing technologies in this market space, liquid crystal displays and plasma displays have emerged as the key players. 10 The progress in the field of flat screen technology has created the need for further advances in stand technology in both the computing and entertainment context. In general, flat screens have been mounted with a simple flat base or "legs", or, especially in the case of computer monitors, a typical arrangement has involved a single support. Unfortunately, both of these approaches allow for very limited 15 movement, if any, for the user to fix the display into a desired position. Other solutions have been proposed. For example, U.S. Patent No. 6,227,518 issued to Sun discloses a pivot base for a flat computer monitor, the base allowing a monitor mounting portion to be tilted forwardly and rearwardly relative to a base member. This base device does not allow for swivelling, comprises two base units, and is only 20 capable of allowing a monitor to pivot about a single axis. U.S. Patent No. 5,769,369 issued to Meinel discloses a support device for a flat screen for use in a vehicle, the device comprising a rectangular cradle member, an elongated stand member with ball and socket joint assembly, and a coupling member. This device may not generally be suitable for normal desktop/tabletop use because the ball 25 socket member allows for lateral movement of a monitor, which in the context of computer monitor or tv display (not in a vehicle) is not desirable. In addition, U.S. Application No. 2004/0011938 filed by Oddsen, Jr., discloses an apparatus for positioning two electronic devices (e.g., flat screen displays) in a plurality of orientations. The apparatus support has a base, a switch arm stand and a 30 pair of ball joint assemblies. The base supports the switch arm stand which in turn WO 2008/098378 PCT/CA2008/000309 -3 pivotably supports the switch arm. This device is directed towards multiple displays and comprises a relatively complicated mounting structure. In view of the foregoing, what is needed is a stand apparatus for a flat screen that is simple, effective and easy to use, and overcomes the disadvantages and limitations of 5 the prior art. Summary of the Invention In one aspect, the present invention provides a novel stand apparatus for use with a display screen (such as a computer monitor or a TV) comprising: (i) an arm member 10 having a curvature; (ii) a base, the base including an aperture, the aperture adapted to accept the arm member and allow for movement of the arm member in relation to the base along an arc path defined by the curvature; and (iii) a contoured clamp member operable to engage and grip the arm member, wherein the contour of the clamp member corresponds to the curvature of the arm member. 15 The present invention is advantageous because the clamp member engages the arm member across a relatively broad area because the curvature of the clamp matches the curvature of the arm member. This provides a secure clamping force and minimizes damage to the finish of the arm member and allows for various surface finishing options. 20 In another aspect, the present invention provides a stand apparatus with an arm screw member coupled with the clamp member, the arm screw member operable to cause the clamp member to engage and grip the arm member. In accordance with one embodiment, the arm screw member is relatively large thereby allowing the user to be able to tactilely identify the arm screw member and tilt the display screen as desired. 25 In a further aspect, the present invention is advantageous because the base provides for fluid tilting movement by virtue of the fit between the aperture and the cross section of the arm member. In accordance with this aspect, the cross-section of the arm member can be selected from the group consisting of square, rectangular, trapezoidal, parallelogrammic, quadrilateral, pentagonal, hexagonal or octagonal. In 30 addition to providing aesthetic value, it should be understood that these cross-section WO 2008/098378 PCT/CA2008/000309 -4 shapes substantially prevent any lateral movement of the arm member in relation to the base, and thereby maintaining a consistent attitude or orientation. In another aspect, the present invention provides a stand apparatus with a base ring that allows the base to freely swivel 360 degrees and a base screw member operable 5 to fix the base ring in relation to the base. The base screw member prevents the display screen from swivelling once it is in a desired position. In a yet further aspect of the present invention, cabling channels are provided in the arm member such that cables from the monitor or TV display are centrally contained and do not interfere with the tilting/swivelling. 10 Brief Description of the Drawings A detailed description of the preferred embodiments is provided herein below by way of example only and with reference to the following drawings, in which: FIG. 1 illustrates a perspective view of the stand apparatus; 15 FIG. 2 illustrates an exploded view of the stand apparatus; FIG. 3 illustrates a cross-sectional view of a portion of the base of the stand apparatus; FIG. 4 illustrates a cross-sectional side view of the stand apparatus; FIG. 5 illustrates a front perspective view of the stand apparatus; 20 FIG. 6 illustrates a front cross-sectional view of the stand apparatus; FIG. 7 illustrates a top view of the stand apparatus; and FIG. 8 and FIG. 9 illustrate side views of the stand apparatus in two tilt positions. In the drawings, one embodiment of the invention is illustrated by way of example. It is to be expressly understood that the description and drawings are only for the 25 purpose of illustration and as an aid to understanding, and are not intended as a definition of the limits of the invention.
WO 2008/098378 PCT/CA2008/000309 -5 Detailed Description of the Invention The present invention in accordance with an embodiment thereof is best understood with reference to FIG. 1 and FIG. 2. The stand apparatus 10 comprises a base ring 5 12 that that is affixable to a surface (not shown) by base ring attachment holes 14 (i.e. using screws or other fastening means. The base ring 12 is fittedly coupled with a round base 16 such that the base 16 is able to freely swivel or rotate within the base ring 12. Bearings may be implemented between the base ring 12 and the base 16 to provide for the swivelling movement. The base 16 and the base ring 12 are fixed in 10 relation to one another by operation of the base screw member 18, such that the base 16 is not rotatable within the base ring 12 when the base screw member 18 having threads 19 is tightened, as shown in FIG. 3 (which illustrates a cross-sectional view of the base ring 12 and the base 16 along axis 3 as defined in FIG. 1). The base 16 can be conical or hemispheric in shape, for example. The base 16 15 includes an aperture (as shown clearly in the exploded view provided in FIG. 2). The aperture of the base 16 is operable to fittedly accept an arcuate arm member 24. In other words, the cross-section and the curvature of the arcuate portion of the arm member 24 correspond with the cross-section and the curvature of the aperture of the base 16. The arm member 24 and the aperture of the base 16 are fitted to allow for 20 movement along an arc path defined by the curvature of the arm member 24, i.e. the arm member 24 is operable to freely tilt in relation to the base 16. As shown in FIG. 4 (a view along axis 8 as defined in FIG. 1), the arm member 24 may include one or more attachment holes 26 (for attachment to a display screen) and preferably one or more cabling channels 28. The cabling channel 28 provides a 25 conduit for cables running from the screen display to the keep the cables tidy and out of the way, preventing them from obstructing the free movement of the screen display when tilting/swivelling. An arm screw member 20 is coupled with a contoured clamp member 22 housed within the base 16. In operation, once a user finds a desired tilt angle of the arm 30 member 24, the user can turn the arm screw member 20, thereby causing the clamp member to engage and grip the arm member 24.
WO 2008/098378 PCT/CA2008/000309 -6 It should be understood that the contour or profile of the surface of the clamp member 22 that engages the arm member 24 substantially matches the curvature of the inside surface of the arcuate portion of the arm member 24 (see FIG. 4). Because of this, the clamp member 22 grips the arm member 24 over a relatively large surface area 5 (see FIG. 4 and FIG. 6), thereby preventing or reducing surface scoring or damage to the arm member 24 that can occur when the clamp member 22 engages the arm member 24. This advantageously allows for more options in the surface finish applied to the arm member 24. For example, the arm member 24 can be anodized or powder coated, in methods that are known. 10 Although this embodiment features a clamp member 22 that engages with the inside surface (i.e. from above) of the arcuate portion of the arm member 24, the present invention is not limited in this regard. For example, an alternate clamp member could alternatively be applied and engage to the outside surface (i.e. from below) of the arm member 24. In that case, an arm member screw or dial (coupled with the clamp 15 member) could be provided on the side of the base 16 for access by the user. It should be appreciated that to allow for the free movement and yet proper fit of the arm member 24 through the aperture of the base 16, not only does the cross-section and curvature of the arm member 24 have to correspond to the size and shape of the aperture of the base, but the cross-section of the arm member 24 must be substantially 20 uniform across the arcuate portion of the arm member 24. The cross-section of the arcuate portion of the arm member 24 as illustrated in the drawings is generally trapezoidal having slightly rounded corners. Because of the cross-section shape, it should be understood that the stand apparatus 10 is constrained in movement such that the arm member is only tiltable in a single, upright plane (see 25 the forward view provided in FIG. 5). In other words, very little if any lateral movement is possible. Consequently, the display screen is maintained at the correct attitude or orientation for the user to view the display screen. Although the cross-section of the arm member 24 is illustrated as being generally trapezoidal (see for instance FIG. 6), it should be understood that other cross-sections 30 are compatible with the present invention, including square, rectangular, parallelogrammic, quadrilateral, pentagonal, hexagonal or octagonal.
WO 2008/098378 PCT/CA2008/000309 -7 FIG. 8 and FIG. 9 show the stand apparatus 10 used in conjunction with a display screen 30. The display screen 30 is affixed to the stand apparatus 10 by attachment screws 32 and the attachment holes 26. FIG. 8 and FIG. 9 show two different tilt angles achievable by the stand apparatus 10. 5 As shown in FIG. 8 and FIG. 9, the arm member 24 comprises an arcuate portion and a longitudinal portion. The overall dimensions of the stand apparatus 10 depend on the proportional size of the arcuate and longitudinal portions, the dimensions of the display screen 30, the dimensions of the base, and the desired height of the display screen 30, among other things, as would be appreciated by a person of skill in the art. 10 It should be understood that although this embodiment features an arcuate arm member 24 having both an arcuate portion and a longitudinal portion, the longitudinal portion is not essential to the present invention. In other words, the arm member 24 can be arcuate in its entirety. One of the advantages of the present invention is the wide range of motion provided 15 by the stand apparatus 10. In fact, there are limitless orientations available given that the base is operable to swivel 360 degrees and the arm member is operable to tilt (the range of angles that can be achieved by tilting the arm member 24 depend on the particular dimensions of the stand apparatus 10). The stand apparatus 10 is also simple to use, since the orientation of the display 20 screen 30 is governed by two handle knobs that are easy to locate and control. The arm screw member 20 is relatively large, allowing a user to reach behind the display screen 30 and tactilely identify the arm screw member 20. As well, the base screw member 18 is easy to identify and easy to reach, allowing the user to adjust the base 16 to swivel in order to orient the display screen 30 in a desired location. 25 It will be appreciated by those skilled in the art that other variations of the preferred embodiment may also be practised without departing from the scope of the invention.