Patent Publication Number: US-9897288-B2

Title: Removable louver or lens holder for a ceiling support grid and method of use

Description:
FIELD OF THE DISCLOSURE 
     This invention generally relates to a louver or lens holders for holding a louver or lens to a ceiling support grid, such as a false ceiling having ceiling tiles supported with a ceiling support grid. 
     BACKGROUND 
     The background information is believed, at the time of the filing of this patent application, to adequately provide background information for this patent application. However, the background information may not be completely applicable to the claims as originally filed in this patent application, as amended during prosecution of this patent application, and as ultimately allowed in any patent issuing from this patent application. Therefore, any statements made relating to the background information are not intended to limit the claims in any manner and should not be interpreted as limiting the claims in any manner. 
     Ceiling support grids and ceiling panels are very common in the office buildings where ceilings are constructed over open floor plan interior designs, such as cubicles. Such ceiling are popular in other commercial, industrial and domestic environments, including and not limited to hotels, meeting rooms, recreation rooms and other types of rooms or constructions which require removable ceilings for access to utilities (heating, air conditioning, water) that are concealed in the space between the drop ceiling tiles and the structural ceiling of the room. Such ceiling systems are well suited for use in old office buildings with high ceilings and with ceilings that are curved or arched. Typically, ceiling panels may be installed from beneath the ceiling support grid. 
     It is often desired to place luminaires or troffers on the ceiling support grid. Luminaires are typically installed to provide light through the ceiling support grid. 
     SUMMARY 
     In at least one embodiment of the present disclosure, a removable louver or lens holder, configured for holding a removable louver or lens to a ceiling support grid, is disclosed. The removable louver or lens holder has a rectangular or square frame having a first side with a first side edge and a second side with a second side edge. The first side edge and the second side edge are parallel with one another. At least one tab extends from the first side edge and at least one locking mechanism is configured to be extended from and retracted into the second side edge. The at least one tab is configured and disposed to cooperate with the ceiling support grid and removably hold the first side edge with the ceiling support grid. The at least one locking mechanism is configured for passing the removable louver or lens holder into the ceiling support grid, upon the at least one tab being cooperated with the ceiling support grid and the at least one locking mechanism being in the retracted position. The at least one locking mechanism is configured for holding the removable louver or lens holder with the ceiling support grid upon the at least one tab being cooperated with the ceiling support grid and the at least one locking mechanism being in the extended position. 
     In at least one other embodiment of the present disclosure, a method for installing a lens or louver with a ceiling support grid is disclosed. The method comprises laying at least one tab, extending from a first side of the lens or louver, on the ceiling support grid and pivoting the lens or louver about the at least one tab and placing it substantially within a plane of the ceiling support grid. At least one support arm is extended outwardly from a second side of the lens or louver and laid on the ceiling support grid and thereby holding the lens or louver with the ceiling support grid. 
     In at least one additional embodiment of the present disclosure, a louver or lens holder configured to solely hold a louver or lens to a ceiling support grid is disclosed. The louver or lens holder is configured to transform its outer perimeter from a first outer perimeter to a second outer perimeter, wherein the first outer perimeter enables the louver or lens holder to fit into the ceiling support grid and the second outer perimeter enables the louver or lens holder to be held solely with the ceiling support grid. 
    
    
     
       BRIEF DESCRIPTIONS OF THE DRAWINGS 
       The foregoing and other features of this disclosure will become more fully apparent from the following description and appended claims, taken in conjunction with the accompanying drawings and examples. Understanding that these drawings depict only several embodiments in accordance with the disclosure and are, therefore, not to be considered limiting of its scope, the disclosure will be described with additional specificity and detail through use of the following figures, which are idealized, are not to scale and are intended to be merely illustrative of aspects of the present disclosure and non-limiting. In the drawings, like elements are depicted by like reference numerals. The drawings are briefly described as follows: 
         FIG. 1  is a perspective exploded view of a lighting system having the removable louver or lens holder of the present disclosure; 
         FIG. 2  is a perspective view of the removable louver or lens holder shown in  FIG. 1 ; 
         FIG. 3  is a perspective view of the removable louver or lens holder, shown in  FIG. 1 , having a first side in cooperation with a ceiling support grid; 
         FIG. 4  is a perspective view of a portion of the removable louver or lens holder, shown in  FIG. 1 , having a locking mechanism in an extended position; 
         FIG. 5  is an upper perspective view of a portion of the removable louver or lens holder, shown in  FIG. 1 , having a first edge in cooperation with a ceiling support grid; 
         FIG. 6  shows an embodiment of a locking mechanism of the present disclosure; 
         FIG. 7  is a lower perspective view of the lighting system shown in  FIG. 1  having the removable louver or lens holder of the present disclosure installed with the ceiling support grid and luminaire; and 
         FIGS. 8A-8C  show alternative examples of designs of the removable louver or lens holders of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     In the following detailed description, reference is made to the accompanying drawings, which form a part hereof. In the drawings, similar symbols typically identify similar components, unless context dictates otherwise. The illustrative embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be utilized, and other changes may be made, without departing from the spirit or scope of the subject matter presented herein. It will be readily understood that the aspects of the present disclosure, as generally described herein, and illustrated in the Figures, can be arranged, substituted, combined, separated, and designed in a wide variety of different configurations, all of which are explicitly contemplated herein. 
     This present disclosure addresses issues associated with ceiling support grid lighting systems. A ceiling support grid lighting system may comprise a luminaire, a removable louver or lens holder, and a removable louver or lens. The luminaire may have a troffer with one or more tube lamps, such as LED tube lamps, held therein. The luminaire may be placed on the ceiling support grid to have the light from the lamps directed downward through a space in the ceiling support grid having a ceiling panel removed. A lens, such as a diffusing lens or diffuser, or louver may be placed about the light opening in the ceiling support grid. In at least one embodiment of the present disclosure, a louver or lens holder is configured to solely hold a louver or lens to a ceiling support grid. For example, the louver or lens holder is not held to or with a luminaire or troffer, but solely held to a ceiling support grid. 
     Embodiments of the present disclosure provide a lens or removable louver holder that enables easy, or less laborious, installation and removal of a lens or louver. In at least one embodiment of the present disclosure, a removable louver or lens holder is provided that enables ease of installation and removal of the lens or louver and access to the luminaire. The removable louver or lens holder may have one or more tabs extending from one edge and one or more locking mechanisms configured and disposed to extend an arm out of the opposite edge of the removable louver or lens holder. 
     The removable louver or lens may be installed by placing a removable louver or lens in the removable louver or lens holder and cooperating at least one tab extending from a first side edge of the removable louver or lens holder with the ceiling support grid and pivoting the removable louver or lens holder about the at least one tab and placing a second edge of the removable louver or lens holder in or above a plane of the ceiling support grid. The locking mechanism(s) may then be activated to extend a portion of the locking mechanism outwardly to cooperate with the ceiling support grid and hold the removable louver or lens to the ceiling support grid. For example, the tabs and locking mechanisms may have portions extending outwardly between a luminaire and ceiling support grid. The removable louver or lens holder may be easily removed by retracting the extended portion of the locking mechanism from the ceiling support grid and swinging or pivoting the removable louver or lens downward and then sliding the tabs out of the ceiling support grid. 
     When the removable louver or lens is installed, the tabs and extended portions of the locking mechanisms may reside between the luminaire or troffer and ceiling support grid. In this example, the weight of the luminaire may further hold the removable louver or lens, held with the removable louver or lens holder, on the ceiling support grid. This may mitigate unwanted removal of the removable louver or lens from the ceiling support grid and may prevent damage and injury from falling louvers or lenses. For example, if the removable louver or lens is inadvertently hit or the building is shaken by an earth tremor, the removable louver or lens may resist becoming dislodged from the ceiling panel ceiling support grid and fall upon and injure people or damage property. 
       FIG. 1  is a perspective exploded view of a lighting system  1  having a removable louver or lens holder  100  of the present disclosure. Lighting system  1  may be configured for installing with a ceiling support grid  20 . Lighting system  1  may have a luminaire  10 , a removable louver or lens  30 , and a removable louver or lens holder  100 . Louver or lens holder  100  may be configured for removably holding louver or lens  30  to ceiling support grid  20 . 
       FIG. 2  shows a perspective view of removable louver or lens holder  100 . As shown in  FIG. 2 , removable louver or lens holder  100  may comprise a rectangular or square frame having a first side  110  with a first side edge  111  and a second side  108  with a second side edge  107 . A third side  105  and a fourth side  106  may extend between first and second sides  110  and  108 . First side  110  may have a portion extending inwardly,  113 , from first side edge  111  and second side  108  may have a portion extending inwardly,  109 , from second side edge  107 . Third and fourth sides  105  and  106  may be similarly configured and have the same cross-sections as first and second sides  110  and  108 . 
     In at least one illustrative example, each side edge, for example  107  and  111 , may extend perpendicularly to a louver or lens and may be configured to extend into troffer or luminaire  10  and prevent light leakage between louver or lens holder  100  and luminaire or troffer  10 . In at least one other illustrative example, inwardly extending portions  109  and  113  are configured and disposed to become flush with ceiling support grid  20  upon louver or lens holder  100  being held with ceiling support grid  20 . 
     In at least one other illustrative example, louver or lens holder  100  is configured to solely hold louver or lens  30  to ceiling support grid  20 . For example, louver or lens holder  100  may be held with ceiling support grid  20  only, in the absence of luminaire or troffer  10 . 
     First side edge  111  and the second side edge  107  are parallel with one another. At least one extension, for example tab  104 , extends from the first side edge  111 . At least one locking mechanism  102  has a portion configured to be extended from, and retracted into, second side edge  107 . At least one tab  104  may be configured and disposed to cooperate with, or lay upon, ceiling support grid  20  and removably hold first side  110  with the ceiling support grid  20 . 
     The at least one locking mechanism  102  may be configured for passing removable louver or lens holder  100  into ceiling support grid  20 , upon the at least one tab  104  being cooperated with ceiling support grid  20  and the at least one locking mechanism  102  being in the retracted position, as shown in  FIG. 3 . The at least one locking mechanism  102  may be configured for holding removable louver or lens holder  100  with the ceiling support grid  20  upon at least one tab  104  being cooperated with, or laid upon, ceiling support grid  20  and the at least one locking mechanism  102  being in the extended position, as shown in  FIGS. 4 and 7 . For example, portions of tabs  104  and extended locking mechanism  102  may lie on portions of ceiling support grid  20 . 
     It is to be understood that louver or lens holder  100  may have a plurality of locking mechanisms  102 , spaced about its perimeter. Placement of selected locking mechanisms  102  in a retracted position may provide louver or lens holder  100  with a first perimeter that may enable louver or lens holder  100  to be placed into ceiling support grid  20 . Upon placing louver or lens holder  100  into ceiling support grid  20 , placement of selected locking mechanisms in an extended position may provide louver or lens holder  100  with a second perimeter that may enable louver or lens holder  100  to be held with ceiling support grid  20 . 
     Removable louver or lens holder  100  may have at least one cross-member  112  extending from its first side  110  to its second side  108  which may provide additional support for louver or lens  30 . Additional cross-members, such as cross-members  114 , may also be disposed with removable louver or lens holder  100 . The cross-members may provide an aesthetic design about a lower surface of louver or lens  30 . 
       FIG. 3  shows a perspective view of removable louver or lens holder  100  having a first side  110  in cooperation with, or lying on, ceiling support grid  20 . Tabs  104  are extended onto a lip of ceiling support grid  20 , cooperating first side  110  with ceiling support grid  20 . Locking mechanisms  102  are in a retracted position, retracted within an outer perimeter of removable louver or lens holder  100 . In this configuration, removable louver or lens holder  100  may be configured with an outer perimeter that may enable it to be placed into ceiling support grid  20  by moving, or pivoting, second side  108  up into ceiling support grid  20 , as designated with arrow “A”. 
       FIG. 4  shows a perspective view of a portion of removable louver or lens holder  100  having a locking mechanism  102  in an extended position. Upon moving second side  108  up into ceiling support grid  20 , locking mechanism  102  may be placed into the extended position wherein a portion thereof extends outwardly from second side edge  107  and may cooperate with ceiling support grid  20 . Also shown in  FIG. 4  is an embodiment of tab  104  formed with a punch out  105  of second side edge  111 . 
       FIG. 5  is an upper perspective view of a portion of removable louver or lens holder  100  having first side edge  111  in cooperation with, or lying on, ceiling support grid  20 . Installation of removable louver or lens holder  100  with ceiling support grid  20  may be performed by placing tabs  104 , extending from side edge  111 , onto a portion of ceiling support grid  20 . 
       FIG. 6  shows an embodiment of a locking mechanism  102  of the present disclosure. Locking mechanism  102  may comprise a retractable support arm  120  configured to extend into and out of a slot opening  116  in second side edge  107 . For example, locking mechanism  102  may comprise a shaft  118  extending from retractable support arm  120  and through a leg extending inwardly  109  from the second side edge  107 . Shaft  118  may have a slot  119  in the end extending through the inwardly extending leg  109  and may be configured to be rotated and to rotate retractable support arm  120  into and out of the extended position. Retractable support arm  121  is shown to designate retractable support arm  120  rotated into a retracted position. For example, a screw driver may be used to cooperate with slot  119  and rotate retractable support arm  120  into an extended position to cooperate with ceiling support grid  20 . 
     In at least one illustrative example, louver or lens holder  100  is configured to transform its outer perimeter from a first outer perimeter to a second outer perimeter. For example, retracting support arm(s)  120  may configure louver or lens holder  100  with a first outer perimeter and enable louver or lens holder  100  to fit into ceiling support grid  20 . Extending support arm(s)  120  may configure louver or lens holder  100  with a second outer perimeter and enable louver or lens holder  100  to be held solely with ceiling support grid  20 . 
       FIG. 7  shows a lower perspective view of lighting system  1  having removable louver or lens holder  100  installed with ceiling support grid  20  and luminaire  10 . Lighting system  1  may have luminaire  10  with a troffer configured with edges configured and disposed to be placed upon tabs  104  and portions of locking mechanisms  102  which may provide vertical support for removable louver or lens holder  100 . As shown in  FIG. 7 , upon installation of lighting system  1 , shafts  118  are accessible, providing a means for rotating retractable support arms  120  and removal of removable louver or lens holder  100 . Luminaire  10  may have a troffer configured with edges configured and disposed to be placed upon  104  tabs and portions, or support arms  120 , of the locking mechanism  102 . 
       FIGS. 8A-8C  show alternative examples of designs of the removable louver or lens holders of the present disclosure. Removable louver or lens holder  130  may have inwardly extending legs, for example cross-member  132 , extending from a first side  136  to a second side  138 . A plurality of wavy cross-members  134  may extend longitudinally from a third side  137  to a fourth side  139 . The inwardly extending legs may be configured to form or hold a louver or lens. For example, cross-members  132  and  134  may form a louver incorporated with removable louver or lens holder  130  or may provide support and/or an aesthetic configuration for a lens, such as a diffuser, to be placed thereon. 
     Removable louver or lens holder  140  may have cross-member  142  extending from a first side  146  to a second side  148 . A plurality of members  144  may extend from a third side  147  and a fourth side  149  to first and second sides  146  and  148 . Members  142  and  144  may provide support and/or an aesthetic configuration for a lens, such as a diffuser, to be placed thereon. 
     Removable louver or lens holder  150  may have cross-member  152  extending from a first side  156  to a second side  158 , with a circular design. A plurality of members  154  may extend from a third side  157  and a fourth side  159 , to cross-member  152 . Members  152  and  154  may provide support and/or an aesthetic configuration for a lens, such as a diffuser, to be placed thereon. 
     Lens support provided with the presently disclosed removable louver or lens holder may mitigate, or eliminate, deformation of the lens from the force of gravity and may aid in holding a lens with the removable louver or lens holder of the present disclosure. It is to be understood that there may be many and different designs made with members extending from the sides of the presently disclosed removable louver or lens holder and that the claims are not to be limited to any particular design. In at least one embodiment, the removable louver or lens holder of the present disclosure is void of members extending between its sides as the members may not be necessary to removably hold a louver or lens with the ceiling support grid. 
     A method of installing a removable louver or lens holder with a ceiling support grid is hereby disclosed. The method for installing a lens or louver with a ceiling support grid comprises the steps of transforming an outer perimeter of a louver or lens holder to a first outer perimeter, laying a portion of the first outer perimeter on a ceiling support grid, pivoting the lens or louver about the portion laid on the ceiling support grid and placing it substantially within a plane of the ceiling support grid, transforming an outer perimeter of the louver or lens holder to a second outer perimeter, and laying a portion of the second outer perimeter on the ceiling support grid and thereby hold the louver or lens to the ceiling support grid. 
     For example, the first outer perimeter may have at least one tab, or extended support arm, extending from a first side of the lens or louver, which may be laid on the ceiling support grid. The lens or louver may be pivoted about the at least one tab and placed substantially within a plane of the ceiling support grid. The louver or lens holder may be transformed to a second outer perimeter by extending at least one support arm, outwardly from a second side of the lens or louver. Lying the at least one support arm, extending from a second side of the lens or louver, on the ceiling support grid may hold the lens or louver solely with the ceiling support grid. In at least one embodiment, the at least one support arm may be extended outwardly from a second side of the lens or louver by rotating at least one locking mechanism. 
     There is thus provided a lighting system for a ceiling support grid comprising a removable louver or lens. One feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in removable louver or lens holder  100 , configured for holding a removable louver or lens  30  to a ceiling support grid, the removable louver or lens holder comprising: a rectangular or square frame having a first side  110  with a first side edge  111  and a second side  108  with a second side edge  107 , wherein the first side edge and the second side edge are parallel with one another; at least one tab  104  extending from the first side edge; at least one locking mechanism  102  configured to have a portion extended from and retracted into the second side edge; wherein the at least one tab is configured and disposed to cooperate with the ceiling support grid  20  and removably hold the first side with the ceiling support grid; wherein the at least one locking mechanism is configured for passing the removable louver or lens holder into the ceiling support grid upon the at least one tab being cooperated with the ceiling support grid and the at least one locking mechanism being in the retracted position; and wherein the at least one locking mechanism is configured for holding the removable louver or lens holder with the ceiling support grid upon the at least one tab being cooperated with the ceiling support grid and the at least one locking mechanism being in the extended position. 
     Another feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in the removable louver or lens holder of, wherein the at least one tab comprises a fixed tab extending from the first side edge. 
     Yet another feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in the removable louver or lens holder, wherein the at least one locking mechanism comprises a retractable support arm  120 / 121  extending from the second side edge. 
     Still another feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in the removable louver or lens holder of further comprising at least one removable louver or lens held between the first side edge  111  and the second side edge  107 . 
     A further feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in an the removable louver or lens holder comprising a third side  105  and a fourth side  106 , wherein the first side, second side, third side, and fourth side each have the same cross-sectional configuration. 
     Another feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in the removable louver or lens holder, wherein the first side, second side, third side, and fourth side each have their side edge extending perpendicular to the at least one removable louver or lens and a leg extending inwardly,  109  and  113  for example, from its side edge, holding the at least one removable louver or lens. 
     Yet another feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in the removable louver or lens holder, wherein the at least one tab is configured and disposed to be placed between a lamp  10  and the ceiling support grid. 
     Still another feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in the removable louver or lens holder, wherein the at least one locking mechanism is configured and disposed to have its support arm  120  to be extended between a lamp housing and the ceiling support grid. 
     A further feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in the removable louver or lens holder, wherein the at least one locking mechanism comprises a retractable support arm configured to be rotated, “B” in  FIG. 6 , into and out of the extended position,  120  and  121 . 
     Another feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in the removable louver or lens holder, wherein the at least one locking mechanism comprises a shaft  118  extending from the retractable support arm  120  and through a leg extending inwardly  109  from the second side edge  107 , the shaft having a slot  119  in the end extending through the inwardly extending leg and is configured to be rotated and to rotate the retractable support arm into the extended position,  120 . 
     Yet another feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in a method of installing a removable louver or lens holder with a ceiling support grid comprising the steps of: cooperating at least one tab extending from a first side edge of the removable louver or lens holder with the ceiling support grid; pivoting the removable louver or lens holder about the at least one tab and placing a second side edge of the removable louver or lens holder in or above a plane of the ceiling support grid; wherein the first and second side edges of the removable louver or lens holder are parallel with one another; extending at least one locking mechanism from the second side edge of the removable louver or lens holder; and wherein the step of extending the at least one locking mechanism from the second side edge of the removable louver or lens holder cooperates a support arm with the ceiling support grid and removably holds the removable louver or lens holder with the ceiling support grid. 
     One feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly a lighting system  1  for a ceiling support grid comprising: a luminaire; a removable louver or lens; a removable louver or lens holder, configured for holding the removable louver or lens to the ceiling support grid; the removable louver or lens holder comprising: a rectangular or square frame having a first side with a first side edge and a second side with a second side edge, wherein the first side edge and the second side edge are parallel with one another; at least one tab extending from the first side edge; at least one locking mechanism having a portion configured to be extended from and retracted into the second side edge; wherein the at least one tab is configured and disposed to cooperate with the ceiling support grid and removably hold the first side edge with the ceiling support grid; wherein the at least one locking mechanism is configured for passing the removable louver or lens holder into the ceiling support grid upon the at least one tab being cooperated with the ceiling support grid and the at least one locking mechanism being in the retracted position; and wherein the at least one locking mechanism is configured for holding the removable louver or lens holder with the ceiling support grid upon the at least one tab being cooperated with the ceiling support grid and the at least one locking mechanism being in the extended position. 
     Another feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in the lighting system, wherein the at least one tab and the at least one locking mechanism have portions configured to extend outwardly from the removable louver or lens holder and be disposed between the ceiling support grid and the luminaire. 
     Yet another feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in the lighting system, wherein the first side and second side of the removable louver or lens holder each have their side edges extending perpendicular to the removable louver or lens and a leg extending inwardly,  109  and  113 , from its side edge, holding the at least one removable louver or lens. 
     Still another feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in the lighting system, wherein the at least one locking mechanism comprises a retractable support arm configured to extend into and out of a slot opening  116  in the second side edge. 
     A further feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in the lighting system, wherein the at least one locking mechanism comprises a shaft  118  extending from the retractable support arm  120  and through a leg extending inwardly  109  from the second side edge, the shaft having a slot  119  in the end extending through the inwardly extending leg and is configured to be rotated and to rotate the retractable support arm into and out of the extended position. 
     Another feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in the lighting system, wherein the removable louver or lens holder comprises at least one cross-member  112  extending from its first side to its second side. 
     Yet another feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in the lighting system, wherein the at least one cross-member extending from its first side to its second side has an aesthetic configuration. 
     Still another feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in the lighting system, wherein the louver or lens is a light diffuser. 
     A further feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in the lighting system, wherein the luminaire  10  has a troffer configured with edges configured and disposed to be placed upon the tabs and portions of the locking mechanism. 
     One feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in a method for installing a lens or louver with a ceiling support grid comprising the steps of: laying at least one tab, extending from a first side of the lens or louver, on the ceiling support grid; pivoting the lens or louver about the at least one tab and placing it substantially within a plane of the ceiling support grid; extending at least one support arm, outwardly from a second side of the lens or louver; and laying the at least one support arm, extending from a second side of the lens or louver, on the ceiling support grid and thereby holding the lens or louver with the ceiling support grid. 
     Another feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in a method for installing a lens or louver with a ceiling support grid of claim  9 , wherein the extending at least one support arm, outwardly from a second side of the lens or louver, comprises rotating at least one locking mechanism. 
     Yet another feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in a louver or lens holder configured to solely hold a louver or lens to a ceiling support grid and to transform its outer perimeter from a first outer perimeter to a second outer perimeter, wherein the first outer perimeter enables the louver or lens holder to fit into the ceiling support grid and the second outer perimeter enables the louver or lens holder to be held solely with the ceiling support grid. 
     Still another feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in a louver or lens holder comprising: a rectangular or square frame having a first side edge and a second side edge, wherein the first side edge and the second side edge are parallel with one another; at least one extension extending from the first side edge; at least one retractable support arm configured to be extended from, and retracted into, the second side edge; wherein the louver or lens holder has the first outer perimeter upon the at least one support arm being retracted into the second side edge and the second outer perimeter upon the at least one support arm being extended from the second side edge. 
     A further feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in a louver or lens holder, wherein the at least one extension is configured and disposed to rest on the ceiling support grid and wherein the at least one retractable support arm is configured to extend outwardly and to rest on the ceiling support grid and hold the louver or lens holder with the ceiling support grid. 
     Another feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in a louver or lens holder, wherein the at least one extension and the at least one retractable support arm have portions configured to extend outwardly from the rectangular or square frame and to become disposed between the ceiling support grid and a luminaire or troffer. 
     Yet another feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in a louver or lens holder, wherein the first side edge and second side edge extend perpendicular to a leg extending inwardly from its side edge, the inwardly extending legs being configured to form or hold a louver or lens and the at least one retractable support arm is configured to extend out of, and retract into, a slot opening in the second side edge. 
     Still another feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in a louver or lens holder, wherein each of the at least one retractable support arm extends from a rotatable shaft extending through the inwardly extending leg, the shaft being configured to be rotated with the end extending through the inwardly extending leg and to rotate the retractable support arm to extend out of, and retract into, the slot opening in the second side edge. 
     A further feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in a louver or lens holder comprising at least one cross-member extending from the first side edge to the second side edge. 
     Another feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in a louver or lens holder comprising a louver or lens extending between the first side edge and the second side edge. 
     Yet another feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in a louver or lens holder, wherein the louver or lens has a light diffuser. 
     One feature or aspect of an illustrative example is believed at the time of the filing of this patent application to possibly reside broadly in a louver or lens holder comprising at least two extensions extending from the first side edge and at least two retractable support arms configured to be extended from, and retracted into, the second side edge. 
     The present disclosure is not to be limited in terms of the particular embodiments described in this application, which are intended as illustrations of various aspects. Many modifications and variations can be made without departing from its spirit and scope, as will be apparent to those skilled in the art. Functionally equivalent methods and apparatuses within the scope of the disclosure, in addition to those enumerated herein, will be apparent to those skilled in the art from the foregoing descriptions. Such modifications and variations are intended to fall within the scope of the appended claims. 
     The present disclosure is to be limited only by the terms of the appended claims, along with the full scope of equivalents to which such claims are entitled. It is to be understood that this disclosure is not limited to particular methods, reagents, compounds compositions or biological systems, which can, of course, vary. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting. 
     With respect to the use of substantially any plural and/or singular terms herein, those having skill in the art can translate from the plural to the singular and/or from the singular to the plural as is appropriate to the context and/or application. The various singular/plural permutations may be expressly set forth herein for sake of clarity. 
     It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as “open” terms (e.g., the term “including” should be interpreted as “including but not limited to,” the term “having” should be interpreted as “having at least,” the term “includes” should be interpreted as “includes but is not limited to,” etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases “at least one” and “one or more” to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles “a” or “an” limits any particular claim containing such introduced claim recitation to embodiments containing only one such recitation, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or “an” should be interpreted to mean “at least one” or “one or more”); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should be interpreted to mean at least the recited number (e.g., the bare recitation of “two recitations,” without other modifiers, means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogous to “at least one of A, B, and C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances where a convention analogous to “at least one of A, B, or C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase “A or B” will be understood to include the possibilities of “A” or “B” or “A and B.” 
     In addition, where features or aspects of the disclosure are described in terms of Markush groups, those skilled in the art will recognize that the disclosure is also thereby described in terms of any individual member or subgroup of members of the Markush group. 
     As will be understood by one skilled in the art, for any and all purposes, such as in terms of providing a written description, all ranges disclosed herein also encompass any and all possible subranges and combinations of subranges thereof. Any listed range can be easily recognized as sufficiently describing and enabling the same range being broken down into at least equal halves, thirds, quarters, fifths, tenths, etc. As a non-limiting example, each range discussed herein can be readily broken down into a lower third, middle third and upper third, etc. As will also be understood by one skilled in the art all language such as “up to,” “at least,” “greater than,” “less than,” and the like include the number recited and refer to ranges which can be subsequently broken down into subranges as discussed above. Finally, as will be understood by one skilled in the art, a range includes each individual member. Thus, for example, a group having 1-3 cells refers to groups having 1, 2, or 3 cells. Similarly, a group having 1-5 cells refers to groups having 1, 2, 3, 4, or 5 cells, and so forth. 
     While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.