Patent Publication Number: US-11046556-B2

Title: Button hook pad hanger

Description:
PRIORITY CLAIM 
     This patent application is a Divisional of U.S. patent application Ser. No. 15/671,075, entitled BUTTON HOOK PAD HANGER, filed on Aug. 7, 2017, and issued as U.S. Pat. No. 10,392,228, which is a Continuation-in-Part of U.S. patent application Ser. No. 15/358,108, entitled ELEVATOR COVER ASSEMBLY, filed on Nov. 21, 2016, now abandoned, which is a Continuation-in-Part of U.S. patent application Ser. No. 13/790,959, entitled ELEVATOR COVER ASSEMBLY, filed on Mar. 8, 2013, and issued as U.S. Pat. No. 9,499,930 on Nov. 22, 2016 which is herein incorporated in entirety by reference. This application is also a Continuation-In-Part of U.S. patent application Ser. No. 14/964,447, entitled ELEVATOR PAD HANGING APPARATUS AND METHOD, filed on Dec. 9, 2015, and issued as U.S. Pat. No. 9,758,350 on Sep. 12, 2017, which is a Divisional of U.S. patent application Ser. No. 13/801,642, entitled ELEVATOR PAD HANGING APPARATUS AND METHOD, filed Mar. 13, 2013, now abandoned, each of which is herein incorporated in entirety by reference. 
    
    
     TECHNICAL FIELD 
     The invention relates generally to hangers for cover assemblies to protect a surface and, more particularly, yet not exclusively, to hangers in elevators for cover assemblies to protect interior walls of the elevators. 
     BACKGROUND 
     Elevator pads are commonly used in elevators to protect the interior surfaces from scratching or other damage. The elevator pads can be attached to the interior walls of the elevator when a large or potentially damaging cargo is to be carried by the elevator, such as when a tenant in an apartment building moves in or out. Conventionally, these elevator pads are clipped to the walls of the elevator or otherwise attached by a metal hanger or by another type of hardware. The pads may include holes in the pad itself, with the holes being arranged at certain intervals along a top edge of the pad to attach to a peg or post in the elevator. 
     This arrangement has significant disadvantages. For example, the spacing of the holes may not match the spacing of the pegs in a given elevator installation. Making additional holes or other modifications to a pad can be a costly process and may compromise the strength of the pad. Making adjustments to the pegs in the elevator can be even more costly and difficult. Thus, it is with regard to these considerations and others that the present invention has been made. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Non-limiting and non-exhaustive embodiments of the present innovations are described with reference to the following drawings. In the drawings, like reference numerals refer to like parts throughout the various figures unless otherwise specified. For a better understanding of the described innovations, reference will be made to the following Detailed Description of the Various Embodiments, which is to be read in association with the accompanying drawings, wherein: 
         FIG. 1  illustrates a schematic isometric depiction of an example elevator cover assembly having a cover, a trim, and knobs; 
         FIG. 2  shows a front view of the cover and trim of  FIG. 1  with one of the knobs of  FIG. 1 ; 
         FIG. 3  illustrates a schematic, isometric, exploded view of the cover, trim, and knob of  FIG. 2 ; 
         FIG. 4  shows various example implementations of the knobs of  FIG. 1 ; 
         FIG. 5A  illustrates a side, exploded view of another example implementation of a cover and one of the knobs of  FIG. 1 ; 
         FIG. 5B  shows a side, non-exploded view of the cover and knob of  FIG. 5A ; 
         FIG. 6A  illustrates a side, exploded view of a portion of the knob of  FIG. 5A ; 
         FIG. 6B  shows a side, non-exploded view of the portion of the knob of  FIG. 6A ; 
         FIG. 7  illustrates an isometric view of the cover and knobs of  FIG. 5B  in an example elevator; 
         FIG. 8A  shows a front view of another example implementation of one of the knobs of  FIG. 1 ; 
         FIG. 8B  illustrates a side view of an example cover and the knob of  FIG. 8A ; 
         FIG. 9  shows a side view of an example implementation of the knob of  FIG. 5B ; 
         FIG. 10  illustrates a side view of another example implementation of the knob of  FIG. 5B ; and 
         FIG. 11  shows a front view of an example implementation of the knob of  FIG. 5B . 
     
    
    
     DETAILED DESCRIPTION OF THE VARIOUS EMBODIMENTS 
       FIG. 1  illustrates a schematic isometric depiction of an elevator cover assembly  100  having a cover  110  and a trim  120 . The cover  110  is a sheet of material with sufficient resiliency and padding to protect a surface, such as an interior surface of an elevator. The embodiments of the invention disclosed herein may be specifically tailored to protect interior elevator walls. The cover  110  may include flexible fabric with padding sewn into the interior. The cover  110  can include rigid panels joined together with flexible fabric sections. The cover  110  is generally flexible enough to fit through the elevator door. The trim  120  is a strip of material positioned at an edge of the cover  110 . The trim  120  may be attached to the cover  110  by stitching or other suitable attachment means. The trim  120  has a plurality of openings  122  formed in the trim  120 . In some embodiments, the trim  120  is made of a flexible material, such as a woven synthetic material like nylon, that is attached to the edge of the cover  110  with a portion of the trim  120  extending beyond the edge of the cover  110 . 
     The trim  120  may be formed as a separate piece from the cover  110  and may be later attached to the cover  110 . The trim  120  can be made in large quantities separate from the cover and can be cut to any length to fit any size of cover. The openings  122  can easily be formed in the trim  120  before the trim  120  is attached to the cover  110 . In some embodiments, the openings  122  are slits formed by passing a heated blade through the trim  120  at desired intervals. The heated blade may also melt-fuse the cut synthetic material ends to bond them together such that they are unlikely to fray or tear. The openings  122  can also be holes, key-hole openings (for example, combination slit and hole), crescent shape openings, or the like. In other embodiments, the trim  120  can be initially formed to include the openings, such as by including a lower scalloped or jagged edge that will engage a knob to keep the cover in place. 
     The apparatus and methods of production of the present invention may provide economic benefits compared to conventional methods, such as cutting and sewing buttonholes in the cover itself. In some embodiments, the trim  120  can be passed under a wheel having appropriately shaped blades at desired intervals such that the openings  122  are formed by simply moving a trim web under the blade wheel. As mentioned above, the blades can be heated to fuse the edges of the openings in the synthetic material that forms the trim to prevent fraying or tearing. In other embodiments, the openings  122  can be formed using a radio frequency weld, which may also be very cost-effective compared to conventional techniques. 
     The flexible nature of the trim  120  may allow the trim  120  to be deformed to spread the openings  122  to insert a knob  130  into the slits. The spacing of the openings  122  may correspond to the spacing of the knobs  130  for hanging. For example, the knobs  130  can be positioned in the interior of an elevator near the top of the elevator walls. In some embodiments, the trim material is chosen such that it can withstand openings  122  separated by very short intervals, such as approximately one inch between openings  122 . Likely, this spacing is more frequent than the knobs  130  will be, but the high frequency may make the assembly able to fit a variety of knob configurations. 
     In some embodiments, the trim  120  is oriented generally horizontally and is positioned at a top of the cover  110 . In other embodiments, the trim  120  can be positioned vertically along a side edge of the cover  110 . The cover assembly  100  can have multiple trims  120  along multiple edges of the cover  110 . For example, the cover  110  can have a trim  120  at the right and left-hand side of the cover  110  to engage with knobs  130  aligned vertically at a deployment site, or the cover  110  can have a trim  120  at all four edges of the cover  110 . In still further embodiments, the trim  120  is positioned at an interior position on the cover  110  to provide still further engagement points. 
     The number, spacing, and layout of the knobs  130  can vary as needed. For example, for embodiments in which the cover assembly  100  is to be used with very heavy-duty equipment, where the cover  110  itself is relatively heavy, the trim  120  and corresponding knobs  130  can be more numerous and placed closer together. In other circumstances in which the cover  110  is relatively light, the openings  122  and corresponding knobs  130  can be spaced further apart. The size of the individual openings  122  can also vary according to expected load. Another variable that may influence the size of the openings  122  is the aesthetic placement of the knobs  130  in the elevator or other location. For example, the openings  122  and knobs  130  may be aligned linearly at approximately the same level such that the load of the cover  100  when resting on the knobs  130  is distributed evenly on the openings  122 . The openings  122  and knobs  130 , however, may not always be aligned in a linear array, perhaps for functional or aesthetic reasons. The pattern of the openings  122  can match the pattern of the knobs  130 . With enough openings  122  in the trim  120 , the alignment to various knobs  130  that may not have the exact spacing of the openings  122  can still be accommodated. 
       FIG. 2  shows a front view of the cover  110  and the trim  120  with a single knob  130  coupled to the trim  120 . As shown in  FIG. 2 , the cover  110  has a herringbone stitching pattern  212  that may improve padding capabilities. The trim  120  may be a separate piece of material from the cover  110  that is then stitched to the cover  110  with two linear stitches  226 . The trim  120  has a first side  224   a , an upper edge  225  of the trim  120 , and a second side  224   b  (on reverse side of trim  120 ; not visible in  FIG. 2 ) opposite the first side  224   a . The trim  120  includes multiple openings  122  spaced throughout the trim  120 . The openings  122  can be made using a heated blade that melts the edges of the openings  122  to prevent fraying. In other examples, the openings  122  can be cut or otherwise formed in the trim  120  and then heated later to seal the edges against fraying. When the trim  120  is a separate piece of material, the trim  120  can be made of a different material than the cover  110 , which may not withstand so many openings  122  at such small intervals without expensive reinforcement and or expensive cuts to make the openings  122 . A conventional elevator pad is designed to withstand impacts but not necessarily to support its own weight when perforated by several slits at small intervals. This drawback may be avoided by the assembly  100 . 
     A knob  130  is shown protruding through one of the openings  122 . The trim  120  may have more openings  122  than the expected number of knobs  130  to provide compatibility with a number of different knob layouts. The material of the trim  120  and the cover  110  can be such that having extra openings  122  does not substantially weaken the cover assembly  100  and may reduce the cost of manufacture by obviating the need to match certain opening configurations with various knob configurations. A building proprietor or service contractor, therefore, need not know the exact layout of the knobs in the elevator and potentially select a cover that does not fit the knobs. The high number and small interval of the openings  122  provides a one-size-fits-all approach that may reduce costs of manufacture and ownership. 
       FIG. 3  illustrates a schematic, isometric, exploded view of the cover  110 , trim,  120  and knob  130  of  FIG. 2 . An edge  314  of the cover  110  can be the top, bottom, or side edge  314  of the cover  110 . The edge  225  of the trim  120  can be formed by a fold between the first side  224   a  and the second side  224   b  of the trim  120 . As illustrated in  FIG. 3 , the first side  224   a  has a first trim edge  332   a , and the second side  224   b  has a second trim edge  332   b . The first trim edge  232   a , cover edge  114 , and second trim edge  332   b  are stitched together to join the trim  120  to the cover  110 . The trim  120 , therefore, extends beyond the cover edge  314  by a certain distance. The assembly also includes openings  122  formed in this portion of the trim  120  for coupling with the knob  130  via the openings  122  as shown by arrow A. The openings  122  can pass through one side of the folded trim  120  or through both sides of the folded trim  120 . In some embodiments, the openings  122  do not pass through the cover  110 . The amount of trim  120  protruding beyond the cover edge  314  depends on the size and layout of the openings  122 . In other embodiments, the cover edge  314  can extend all the way to the fold  225 , and the openings  122  can be formed in the trim  120  as well as through the cover  110 . In still further embodiments, the trim  120  can be a single sheet of material stitched to the cover  110  on one side, having no fold  225 , and having openings  122  that engage the knobs  130 . The trim  120  can be a long, continuous strip of material as shown in  FIGS. 1-3 , or it can be smaller, discrete fabric sections having openings  122  configured to engage knobs  130  to hold the cover assembly  100  in place. In still further embodiments, the openings  122  can be formed directly into the cover  110  and the trim  120  can be omitted partially or entirely. 
     In one example, the first and second trim edges  332   a  and  332   b  are attached to an upper portion or area of the cover  110  such that the upper edge  314  extends upwardly toward the fold  225  and beyond the trim edges. Thus, the upper edge  314  does not necessary need to be attached to the trim edges  232   a  and  232   b . Rather, the upper edge  314  could extend up to the fold  225 , whether inside or outside of the enclosure formed by trim  120 . In other examples, the openings  122  can be formed through the upper portion or area of the cover  110 . 
       FIG. 4  shows several knob configurations for use with the elevator cover assembly  100 . The knob  130   a  has a base  434 , a stem  436 , and a head  438  at an end of the stem  436 . As shown in  FIG. 4 , the head  438  is integral to the stem  436 , and the stem  436  is integral to the base  434 . The head  438  can be slightly larger than the stem  436  to prevent the cover assembly  100  from falling off the knob  130 . Base  434  may include a quick-cure adhesive  435  on the backside thereof for easy application to a wall, including glass. The adhesive  435  can be a high-strength adhesive such as a 3M&#39;s VHB 4941 acrylic adhesive tape that provides excellent adhesion to a broad range of high and medium surface energy substrates including metals, glass, and a wide variety of plastics and plasticized vinyl, even with mismatched substrates. Suitable adhesive tapes may have very high tensile strength having a normal tensile strength of between 480-620 kPa, a 90° peel adhesion strength of between 245-385 N/100 mm, and a dynamic overlap sheer strength of between 450-620 kPa. Use of an adhesive  435  allows the knob  130   a  to be attached to the wall without intrusive and expensive penetration of the wall such as by drilling or puncturing. In other embodiments, the base  434  includes another attachment mechanism, such as a threaded fastener or the like. Other than the adhesive layer  435 , the knob  130   a  can be a unitary piece of material or can be a base  434  welded to a stem  436  and a head  438  welded to the stem  436 . It may be formed by machining or otherwise forming from a single piece of material, preferably metal. 
     Another embodiment is knob  130   b , which has a base  434  and an upwardly angled stem  440 . The upward slope keeps the cover assembly  100  from slipping off the knob  130   b  and therefore may obviate the desire for a head  440 . The slope and length of the knob  130   b  can vary as needed for a particular installation. Another embodiment is knob  130   c , which includes a base  434 , a horizontally extending stem portion  442 , and an upwardly extending portion  444  that functions similarly to the head  438  to prevent the cover assembly  100  from slipping off the knob  130   c . In any of these embodiments, the base  434  can be omitted in favor of a simple stem  436 ,  440 ,  442  (optionally in combination with a head  438 ) extending from the wall of the elevator. In some embodiments, the knob  130  can include a base  434  having multiple projections extending therefrom. Any suitable configuration of the knob  136  can be used with the elevator cover assembly  100 . As such, the knob  130  is configured to receive an opening  122  of a wall cover  110 . 
     The head  438  is configured (for example, sized and shaped) to receive an opening  122  of a wall cover  110  to hang the wall cover  100  to protect a wall. In one example, the head  438  has a cross-sectional area having a shape being one of a square, a rectangle, an oval, a circle, and a polygon. In one example, a perimeter edge (e.g., an entire perimeter) of the head  438  is formed at an angle relative to a central axis of the stem  436  (for example, an “angle” between 20 and 70 degrees). Similarly, a perimeter edge of the base  434  can be formed at a similar angle relative to the central axis of the stem  436  as that of the angled edges of the head  438 . Edge portions adjacent the perimeter edges can also be chamfered (for example, rounded, smoothed, angled, or the like) to minimize damage to objects impacting the knob  130 . 
     In some examples, the knob  130  has a conically shaped body extending outwardly from the base  434  and the wall. Such a conically shaped body may allow a wall cover  100  to smoothly slide along the upper portion of the conical body when an individual disposes an opening  122  of the cover  110  over the knob  130 . And, the outward conical body further vertically supports a wall cover  110  at the upper portion of the knob  130 . In one aspect, the knob  130  includes a solid conically shaped body that terminates at a planar surface that is parallel to the wall when installed. 
       FIG. 5A  illustrates a side, exploded view of another example implementation of a cover  110  and one of the knobs  130  of  FIG. 1 . As shown in  FIG. 5A , the base  434  of knob  130  forms a hook. For example, the base  434  may include a hanging portion  516  that engages a wall or panel of an elevator and a suspension portion  518  that engages an upper edge portion of the protective cover  110 . As is apparent in  FIG. 5B , the hanging portion  516  include a horizontal portion  532  that is oriented perpendicular to the suspension portion  518  at a first edge of the horizontal portion  532  and that secures a vertical portion  534  at an opposing edge of the horizontal portion  532 , such that both the suspension portion  518  and vertical portion  534  extend in the same direction and are suitable for capturing a portion of a wall or wall panel of an elevator therebetween. Accordingly, a separation distance between the vertical portion  534  and the suspension portion  518  may be slightly larger than, for example, of a width of the panel with which the knob  130  is used (for example, within five or ten percent). Other forms and shapes of hooks may also be used. 
     The suspension portion  518 , horizontal portion  532 , and vertical portion  534  may be formed of a monolithic piece of material or secured to one another by means of welds, bolts, or any other fastening means. Some or all of the suspension portion  518 , horizontal portion  532 , and vertical portion  534  may be covered with a compliant or cushioning material or coating in order to prevent damage to an elevator wall or wall panel. In some embodiments, the inner surfaces of the suspension portion  518  and vertical portion  534  (those surfaces of the suspension portion  518  and vertical portion  534  facing one another) and a lower surface of the horizontal portion  532  may be coated with a compliant or cushioning material or have a pad or cushion secured thereto. 
     With the protective cover  110  facing, engaging, or otherwise adjacent, the suspension portion  518 , the protective cover  110  may be fastened to the suspension portion  518 . For example, the suspension portion  518  may include an aperture  520 . A fastener  522  of the knob  130  is passed through the aperture  520  and the opening  122  in the cover  110  and captures the suspension portion  518  and protective pad  510  therebetween. In one embodiment, the fastener  522  is a snap rivet that includes a first portion  524   a  and a second portion  524   b  that engage one another in a removable or non-removable fashion. For example, the first and second portions  524   a ,  524   b  may include heads  438   a ,  438   b  that are sufficiently wide to capture a significant portion of the protective cover  110  and suspension portion  518  therebetween, as shown in  FIG. 5B . 
     The manner in which the heads  436   a ,  536   b  secure to one another through the aperture  520  and opening  122  may include any manner known in the art of plastic rivets. For example, one of the heads  536   a  may have a receiving stem  436   a  secured thereto, the receiving stem  436   a  having a smaller diameter than the head  536   a  and defining an aperture. The other head  536   ab  may have an insertable stem  436   b  secured thereto. The insertable stem  436   b  may be insertable into the receiving stem  436   a  and may be retained in the receiving stem  436   a  by some means. For example, the insertable stem  436   b  may have a barb or lip that engages a groove, tab, shoulder, or other structure within the receiving stem  436   a  to hinder removal. In a like manner, the receiving stem  436   a  may have a barb or lip within a central aperture thereof that engages a groove, lip, or tab, encircling the insertable stem  436   b . Any other means of securing the insertable stem  436   b  and receiving stem  436   a  together that may be suitable for plastic rivets may be used, including threaded engagement or friction fit. As another example, one or more of the stem  436   b  or the stem  436   a  may be integral to the base  434  (for example, one or more of the stem  436   b  or the stem  436   a  may be formed of a monolithic piece of material with regard to the base  434 ). 
       FIG. 6A  illustrates a side, exploded view of an example implementation of the heads  438   a ,  438   b  and the stems  436   a ,  436   b .  FIG. 6B  shows a side, non-exploded view of the heads  438   a ,  438   b  and the stems  436   a ,  436   b . As shown, the receiving stem  436   a  includes a plurality of internal circumferential grooves  636 . The receiving stem  436   a  may additionally include one or more slits  638  to facilitated compliant expansion of the receiving stem  436   a . In other examples, the one or more slits  638  may instead be defined in the insertable stem  436   b  to facilitate compliant compression of the insertable stem  436   b  during insertion. In yet another example, one or both of the receiving stem  436   a  and the insertable stem  436   b  are sufficiently compliant to enable insertion without slits  638 . 
     The insertable stem  436   b  may include a plurality of circumferential ridges  640  or barbs  640  that are sized to fit within the grooves  636 . The pitch of the barbs  640  may be the same as the pitch of the grooves  636  such that the insertable stem  436   b  may be engaged at a variety of axial positions depending on a desired separation between the heads  438   a ,  438   b . The circumferential barbs  640  may slope inward with distance toward the proximal end portion of the insertable stem  436   b  (the end portion of the stem  436   b  that is opposite from the head  438   b ) such that the insertable stem  436   b  is more readily insertable than removable. The grooves  636  may be simple cylindrical grooves or may have a taper or slope corresponding to the barbs  640 . 
     In use, the insertable stem  436   b  may be urged into the receiving stem  436   a . The barbs  640  may slightly deflect the walls of the receiving stem  436   a , facilitated by the one or more slits  638 . The barbs  640  may seat within the grooves  636 , and the compliance of the receiving stem  436   a  may urge the grooves  636  against the barbs  640 . Due to the slope and orientation of the barbs  640 , removal of the insertable stem  436   b  may require much more force than insertion and may even be impossible without destroying the barbs  640  or walls of the receiving stem  436   a . In some example implementations, the barbs  640  and grooves  636  are helical in shape (for example, the barbs  640  or grooves  636  define threads), such that disengagement of the barbs  640  and grooves  636  may be accomplished by relative rotation of the barbs  640  and grooves  636 . 
       FIG. 7  illustrates an isometric view of the cover  110  and the knobs  130  in an elevator  742 . The elevator  742  may be protected by engaging a number of knobs  130  with one or more wall panels  744   a ,  744   b  and hanging a protective cover  110  from the knobs  130 . As illustrated, the horizontal portion  532  engages the upper edge  746  of the wall panel  744   a ,  744   b , with the upper edge  746  of the wall panel  744   a ,  744   b  being captured between the vertical portion  534  (not shown in  FIG. 7 ) and the suspension portion  518 . The cover  110  may be oriented to cover the entirety, or substantially the entirety, of the wall panel  744   a ,  744   b . As another example, the knobs  130  may engage a hanging ceiling grid in the elevator  742 , instead of the upper edge  746  of the wall panels  744   a ,  744   b.    
       FIG. 8A  shows a front view of another example implementation of one of the knobs  130  of  FIG. 1 . The suspension portion  518  may have a front portion  818   a  and a rear portion  818   b  secured thereto, such as at a lower end thereof. The front and rear portions  818   a ,  818   b  may define a gap  856  therebetween such that a protective cover  110  is insertable into the gap  856 . For example, an upper end of the portions  818   a ,  818   b  may be secured to a lower end portion of the suspension portion  518  and lower ends of the portions  818   a ,  818   b  may be free to enable insertion of the protective cover  110  into the gap  856 . 
     The front and rear portions  818   a ,  818   b  may define apertures  820   a ,  820   b , respectively, for receiving a fastener  522 . In use, the receiving stem  436   a  or the insertable stem  436   b  may pass through the aperture  820   a , the opening  122  in the protective cover  110 , and the aperture  820   b  in order to secure the cover  110  to the knob  130 . In the example shown in  FIGS. 8A and 8B , a front surface of the front portion  818   a  and a rear surface of the rear portion  818   b  may define countersinks  858   a ,  858   b  around the apertures  820   a ,  820   b , respectively, to receive the heads  438   a ,  438   b  of the fastener  522 . The depths of the countersinks  858   a ,  858   b  may be shaped and dimensioned to prevent the heads  438   a ,  438   b  from protruding beyond the front and rear surfaces of the portions  818   a ,  818   b , respectively. The front portion  818   a  may define a recess  860  for receiving a label, such as an adhesive label, to facilitate branding or labeling of the knob  130  with other information. 
     As shown in  FIG. 8A , the front and rear portions  818   a ,  818   b  may be somewhat wider than the suspension portion  518  (for example, between 50 and 120 percent wider). The increased width of the front and rear portions  818   a ,  818   b  may provide area for defining the apertures  820   a ,  820   b  and may provide sufficient material around the apertures  820   a ,  820   b  to support stresses imposed by the fastener  522  when inserted through the apertures  820   a ,  820   b . As illustrated in  FIG. 8B , the front portion  818   a  may protrude forwardly from the suspension portion  518 , whereas the rear portion  818   b  may have a rear surface that is flush with the rear surface of the suspension portion  518 , thus permitting the cover  110  to hang flat along a wall panel to which it is mounted. 
     In some example implementations, one of i) the combination of the stem  436   b  and the head  438   b  or ii) the combination of the stem  436   a  and the head  438   a  may be omitted. In some examples, employing a stem  436  and a head  438  on only a single side of the base  434  may permit placing the other side of the base  434  flush against a surface of an elevator.  FIG. 9 , for example, shows a side view of the knob  130  of  FIG. 5B , with the knob  130  including the stem  436   a  and the head  438   a  on only the interior side of the base  434  (only a single stem  436  and a single head  438  on the same side of the suspension portion  518  as the horizontal and vertical portions  532 ,  534 ). Employing the stem  436   a  and the head  438   a  on the interior side of the base  434  may facilitate hanging a cover  110  from a suspended ceiling grid in an elevator. As shown in  FIGS. 9 and 11 , stem  436   a  is substantially straight and the proximal end portion of the stem  436   a  extends from the face  1118  and substantially normal to the face  1118 . As shown in this preferred embodiment, only one stem is coupled to the face. As also shown in  FIG. 9 , one or more of the horizontal portion  532  or the vertical portion  534  may be curved. 
     In either instance, with the stem on the interior or exterior side of the hanger, the elevator cover assembly  100  may be secured over the head  438   a ,  438   b  and onto the stem  436   a ,  436   b  by separating the openings  122  on the trim  120  and securing it over the head. The head is sized to closely accommodate an opening and provide a secure hanging securement on the stem, retained by the head. 
     As another example,  FIG. 10  illustrates a side view of the knob  130  of  FIG. 5B , with the knob  130  including the stem  436   b  and the head  438   b  on only the exterior side of the base  434  (only a single stem  436  and a single head  438  on the opposite side of the suspension portion  518  from the horizontal and vertical portions  532 ,  534 ). Employing the stem  436   b  and the head  438   b  on the exterior side of the base  434  may facilitate hanging a cover  110  from a wall panel in an elevator. As shown in  FIGS. 10 and 11 , stem  436   b  is substantially straight and the proximal end portion of the stem  436   b  extends from the face  1118  and substantially normal to the face  1118 . As shown in this preferred embodiment, only one stem is coupled to the face. As also shown in  FIG. 10 , one or more of the horizontal portion  532  or the vertical portion  534  may vary in thickness. 
     In some example implementations (for example, as shown in  FIGS. 1, 3, 4, 9, and 10 ), the stem  436  is integral to the base  434  (for example, the face  1118  of the base  434 ). For example, as shown in  FIGS. 1, 3, 4, 9, and 10  the stem  436  and the base  434  are formed of a monolithic piece of material. Employing an integral stem  436  may reduce the likelihood that the stem  436  unintentionally separates from the base  434  when hanging or unhanging the cover  110  on the knob  130 . As another example, the proximal end portion of the stem  436  (the end portion of the stem  436  that is opposite from the head  438 ) may be configured (for example, sized, dimensioned, positioned, oriented, or the like) to secure the stem  436  in the aperture  520  after being pushed into the aperture  520 . For example, the proximal end portion of the stem  436  may have two radially enlarged circumferential portions that are configured (for example, sized, dimensioned, and spaced apart from each other) to receive and retain the inner face of the aperture  520  therebetween. 
     In some example implementations, a face  1118  (for example, the front portion  818   a  or the rear portion  818   b , as seen in  FIGS. 8A and 8B ) disposed at the lower end of the suspension portion  518  may have the stem  436  and the head  438  attached thereto. The face  1118  may be parallel to the suspension portion  518 . In  FIG. 9 , for example, the stem  436   a  extends from the face  1118  of the base  434  in the same direction that the horizontal portion  532  of the base  434  extends from the suspension portion  518  of the base  434 . In contrast, in  FIG. 10 , for example, the stem  436   b  extends from the face  1118  of the base  434  in the opposite direction from the direction in which the horizontal portion  532  of the base  434  extends from the suspension portion  518  of the base  434 . 
     The face  1118  may have a variety of suitable shapes, such as the shape of the suspension portion  518  as shown in  FIG. 7 , the shape of the front portion  818   a  as shown in  FIG. 8A , or the like.  FIG. 11  shows a view of another example shape of the face  1118  of the knob  130 . In this example, the width of the face  1118  varies from the top of the face  1118  to the bottom of the face  1118 , increasing from the width of the suspension portion  518  at the top portion of the face  1118  to a width that slightly exceeds the width of the label recess  860  at the middle portion of the face  1118  and decreasing to a width that slightly exceeds the diameter of the head  438  at the bottom portion of the face  1118 . 
     In some example implementations, the knob  130  is configured (for example, sized and dimensioned) to hang from an upper edge of a wall panel or suspended ceiling grid in an elevator with the vertical portion  534  of the base  130  being disposed on one side of the upper edge of the wall panel or suspended ceiling grid in the elevator and the suspension portion  518  of the base  130  being disposed on the opposite side of the upper edge of the wall panel or suspended ceiling grid in the elevator. The stem  436  of the knob  130  may be configured (for example, sized, dimensioned, positioned, oriented, or the like) to receive and suspend a portion of the cover  110  with the distal end portion of the stem  436  extending through one of the openings  122  in the cover  110 . The head  438  of the knob  130  may be configured (for example, sized, dimensioned, positioned, oriented, or the like) to fit through one or more of the openings  122  in the cover  110  to removably retain the portion of the cover  110  that hangs from the knob  130  with the head  438  being disposed on the opposite side of the cover  110  from the face  1118  of the base  434 . 
     For example, the knob  130  may have any dimensions suitable for hanging a cover  110  in an elevator. In some example implementations, the knob  130  has an overall height of at least 2, 3, 4, 4.5, 5, 5.5, or 6 inches. The head  438  disposed at the distal end portion of the stem  436  may have a diameter of at least 0.3, 0.4, 0.5, 0.6, 0.7, or 0.8 inches. The stem  436  may have a length of at least 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, or 0.5 inches (for example, the distance between the face  1118  and the head  438 ). The suspension portion  518  may have a width of at least 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, or 0.5 inches. One or more portions of the base  434 , such as one or more portions of the vertical portion  534 , the horizontal portion  532 , the suspension portion  518 , or the face  1118 , may have a thickness of 0.75, 0.1, 0.15, 0.2, 0.3, 0.4, or 0.5 inches. 
     The various embodiments have been described above with reference to the accompanying drawings, which form a part hereof, and which show, by way of illustration, specific example embodiments by which the invention may be practiced. The embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these examples are provided so that this disclosure will be thorough and complete and will fully convey the scope of the embodiments to those skilled in the art. Among other things, the various embodiments may be methods, systems, or devices. The following detailed description is, therefore, not to be taken in a limiting sense. 
     Throughout the specification and claims, the following terms take the meanings explicitly associated herein, unless the context clearly dictates otherwise. The phrase “in one embodiment,” “in one example,” or “in one implementation” as used herein does not necessarily refer to the same embodiment, example, or implementation, though it may. Furthermore, the phrase “in another embodiment,” “in another example,” or “in another implementation” as used herein does not necessarily refer to a different embodiment, example, or implementation, although it may. Thus, as described throughout, various embodiments may be readily combined, without departing from the scope or spirit of the invention. 
     In addition, as used herein, the term “or” is an inclusive “or” operator, and is equivalent to the term “and/or,” unless the context clearly dictates otherwise. The term “based on” is not exclusive and allows for being based on additional factors not described, unless the context clearly dictates otherwise. In addition, the meaning of “a,” “an,” and “the” include plural references. Further, plural references should be interpreted as also disclosing singular references. The meaning of “in” includes “in” and “on.” Also, the use of “when” and “responsive to” do not imply that associated resultant actions are required to occur immediately or within a particular time period. Instead, they are used herein to indicate actions that may occur or be performed in response to one or more conditions being met, unless the context clearly dictates otherwise. Additionally, throughout the specification, the use of “exemplary” does not imply that other embodiments do not perform as well or are not as worthy of illustration. Instead, the term is used herein to emphasize that each element or function described by the term is an example element or function. 
     The foregoing examples should not be construed as limiting or exhaustive, yet rather, illustrative use cases to show implementations of at least one of the various embodiments of the invention. Accordingly, many changes can be made without departing from the spirit and scope of the invention. Any feature or element described herein may be implemented additionally or alternatively to any other feature or element described herein as suitable to, for example, hang a cover  110  in an elevator. For example, any of the example implementations of the base  434  may include any of the example shapes of the vertical portion  534 , horizontal portion  532 , the face  1118 , or the like. Thus, the scope of the invention is not limited by the disclosure of the examples. Instead, the invention should be determined entirely by reference to the claims that follow.