Abstract:
A method of assembling a slider window assembly for a vehicle includes providing at least one fixed window panel defining an opening with an upper frame portion and a lower frame portion fixed relative to the fixed window panel. A movable window panel is loaded at the upper and lower frame portions by (i) inserting a lower portion of the movable window panel into a portion of a lower channel element of the lower frame portion to a first depth, (ii) aligning an upper portion of the movable window panel with an upper channel of the upper frame portion, (iii) raising the movable window panel so that the upper portion is at least partially received in the upper channel and the lower portion is at a second depth to generally align with a receiving portion of the guide element, and (iv) moving the lower portion into the guide element.

Description:
CROSS REFERENCE TO RELATED APPLICATION 
       [0001]    The present application is a continuation of U.S. patent application Ser. No. 13/992,252, filed Jun. 7, 2013, now U.S. Pat. No. 8,915,018, which is a 371 national phase entry of PCT Application No. PCT/US2011/0066522, filed Dec. 21, 2011, which claims the filing benefits of U.S. provisional application 61/426,065, filed Dec. 22, 2010, which is hereby incorporated herein by reference in its entirety 
     
    
     FIELD OF THE INVENTION 
       [0002]    The present invention relates to a slider window assembly for a vehicle and, more particularly, a rear slider window assembly for a vehicle and, more particularly, a rear slider window assembly for a pickup truck or the like. 
       BACKGROUND OF THE INVENTION 
       [0003]    It is known to provide a slider window assembly for an opening of a vehicle, such as a rear slider window assembly for a rear opening of a pickup truck. Conventional slider window assemblies for rear openings of trucks or the like typically include three or more panels, such as two fixed window panels and a slidable window panel. The slidable window panel is supported by rails and may be moved along the rails to open and close the window. Typically, the upper rail includes a resilient filler and is sized to be able to sufficiently receive the upper edge region of the slidable window panel to allow for a carrier at the lower edge region of the slidable window panel to be aligned with and dropped or lowered into the lower rail. 
       SUMMARY OF THE INVENTION 
       [0004]    The present invention provides a rear slider window assembly that has a lower channel and guide element secured and fixed in the lower channel for receiving a carrier of a movable window panel and for guiding the carrier along the channel and guide between its opened and closed positions. The channel preferably extends beyond an end of the guide element a sufficient amount to receive the carrier therein for ease of installation of the carrier that carries the movable window panel and for alignment of the carrier with the guide portion of the guide element. When the carrier is disposed in the channel and aligned with an end of the guide portion, the carrier may be inserted into and moved along the guide portion to the closed position of the movable window panel. The carrier may be attached at each end to a drive cable of a powered window drive system, whereby pulling at either end of the carrier by the respective cable moves the carrier and the movable window panel between its opened and closed positions. 
         [0005]    According to an aspect of the present invention, a rear slider window assembly of a vehicle (such as a pickup truck or the like) includes a frame portion having an upper rail and a lower rail. First and second spaced apart fixed window panels are fixed relative to the frame portion and define or establish an opening therebetween. A movable window panel is movable along the upper and lower rails and is movable between a closed position, where the movable window panel is disposed at the opening, and an opened position, where the movable window panel is disposed at least partially along the first fixed window panel. The lower rail comprises a generally U-shaped channel that extends at least partially along the first and second fixed window panels and the opening, and the lower rail comprises a guide element that is received in the channel and that is secured and fixed thereto. The lower rail extends at least partially along the first fixed window panel and the opening. A carrier is established at a lower portion of the movable window panel and is configured to be received in, be supported by and to move along an inner surface of a bottom wall of a guide portion of the guide element. The channel extends at least partially along the second fixed window panel and beyond an end of the guide element so as to receive the carrier at the second fixed window panel during loading of the movable window panel in the upper and lower rails. The movable window panel is received in the channel at a first depth during the loading process and is raised to a second depth to generally align the carrier with the guide portion of the guide element for insertion of the carrier into the guide portion for movement along the inner surface of the bottom wall of the guide portion. 
         [0006]    The carrier may at each end be connected to a cable of a powered window drive system that operates to move the carrier and movable window panel between its opened and closed positions. In order to facilitate receiving of the carrier in the channel where the guide element is not disposed, it is preferred that a length dimension of the guide element be less than a length dimension of the channel by an amount at least equal to a length dimension of the carrier. 
         [0007]    The generally U-shaped channel comprises a lower wall and a pair of spaced apart generally vertical walls extending from the lower wall, and the generally vertical walls have substantially flat inner surfaces. The channel may be insert molded into a mounting element of the rear slider window assembly. The straight, generally flat walls of the channel provide for enhanced molding of the mounting element at and at least partially around the channel while limiting or reducing scrap that may occur in conventional moldings due to warping or flexing or bending of the channels during the molding processes. 
         [0008]    These and other objects, advantages, purposes and features of the present invention will become apparent upon review of the following specification in conjunction with the drawings. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0009]      FIG. 1  is a rear perspective view of a pickup truck having a rear slider window assembly in accordance with the present invention; 
           [0010]      FIG. 2  is a front elevation of the rear slider window assembly of the present invention, as viewed from the forward or interior side of the window assembly when the window assembly is normally mounted to a vehicle; 
           [0011]      FIG. 2A  is a sectional view of the lower portion of the rear slider window assembly taken along the line A-A of  FIG. 2 ; 
           [0012]      FIG. 2B  is a sectional view of a prior art sliding window for vehicles; 
           [0013]      FIG. 3  is a perspective view of the rear slider window assembly of  FIG. 2 ; 
           [0014]      FIG. 4  is a perspective view of a lower channel element of the rear slider window assembly of the present invention; 
           [0015]      FIG. 5  is a perspective view of a guide element of the rear slider window assembly of the present invention; 
           [0016]      FIG. 6  is a perspective view of a carrier of the rear slider window assembly of the present invention; 
           [0017]      FIG. 7  is an exploded perspective view of the lower channel element and guide element and carrier and movable window panel of the rear slider window assembly of the present invention; 
           [0018]      FIG. 8  is an enlarged perspective view of the lower channel element and guide element and movable window panel assembly of  FIG. 7 , showing the movable window panel and carrier assembled together; 
           [0019]      FIG. 9  is another perspective view of the lower channel element and guide element and movable window panel assembly of  FIG. 7 , showing the movable window panel and carrier assembled together and the channel element and guide element assembled together; 
           [0020]      FIG. 10  is a perspective view of the lower channel element and guide element and movable window panel assembly, with the carrier and window panel inserted into the channel element next to the guide element, such as for installing or removing the movable window panel at the rear slider window assembly; 
           [0021]      FIG. 11  is another perspective of the lower channel element and guide element and movable window panel assembly of  FIG. 10 , showing the carrier and window panel raised relative to the channel element to be at a level for sliding insertion of the carrier into and along a guide portion of the guide element; 
           [0022]      FIG. 12  is another perspective of the lower channel element and guide element and movable window panel assembly, shown assembled together with the carrier received in and partially along the guide portion of the guide element that is disposed in and partially along the channel element; 
           [0023]      FIG. 13  is another perspective view of the lower channel element and guide element and movable window panel assembly of  FIG. 12 ; 
           [0024]      FIG. 14  is a perspective view of another rear slider window assembly of the present invention, as viewed from the forward or interior side of the window assembly when the window assembly is normally mounted to a vehicle; 
           [0025]      FIG. 15A  is a sectional view of the rear slider window assembly taken along the line A-A in  FIG. 14 ; 
           [0026]      FIG. 15B  is a sectional view of the rear slider window assembly taken along the line B-B in  FIG. 14 ; 
           [0027]      FIG. 15C  is a sectional view of the rear slider window assembly taken along the line C-C in  FIG. 14 ; 
           [0028]      FIG. 15D  is a sectional view of the rear slider window assembly taken along the line D-D in  FIG. 14 ; and 
           [0029]      FIG. 15E  is a sectional view of the rear slider window assembly taken along the line E-E in  FIG. 14 . 
       
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0030]    Referring now to the drawings and the illustrative embodiments depicted therein, a rear slider window assembly  10  of a vehicle  12  (such as a pickup truck or the like) includes a window frame  14 , a pair of side fixed window panels  16 ,  18  and a movable window panel  20  that is movable relative to frame  14  and fixed window panels  16 ,  18  between an opened position and a closed position ( FIGS. 1-3 ). Frame  14  comprises an upper rail  22  and a lower rail  24 , with the upper and lower edge regions of movable window panel  20  slidably received in and along the respective upper and lower rails  22 ,  24 . Lower rail  24  comprises a generally U-shaped channel  26  disposed generally horizontally along the rear slider window and spanning at least part of each of the fixed window panels  16 ,  18 , with a guide element  28  received in and fixedly secured (such as by gluing or by mechanically securing) in channel  26  and extending only partially along channel  26 , such as extending along one of the fixed window panels  16  and the opening for the movable window panel  20 . Preferably, guide element  28 , which is received in and is fixedly secured in channel  26 , extends only partially along about one half of the length dimension of channel  26  and occupies about one half of the length dimension of channel  26  and extends from a distal end portion of channel  26  to about the midpoint of channel  26 . The lower edge region  20   a  of the movable window panel  20  is received in or attached to a carrier  30 , which is movably received in guide element  28  and is movable or slidable along guide element  28  as the movable window panel  20  is moved between its opened and closed positions, as discussed below. 
         [0031]    In the illustrated embodiment, window assembly  10  includes two fixed window panels  16 ,  18  that are spaced apart so as to define an opening therebetween. Slider or movable window panel  20  is movable along lower rail  24  and upper rail  22  of frame portion  14  to open and close the opening, such as in a manner similar to known slider window assemblies. Slider window panel  20  is disposed at lower carrier  30 , which receives the lower perimeter edge region  20   a  of the slider window panel  20  therein and that is slidably or movably received in the guide element  28  of the lower rail  24  of frame portion  14 . The movable or slider window panel  20  is movable such as via manual pushing or pulling at the window panel or in response to actuation of a drive motor of a drive motor assembly or system, which may move cables or the like to impart horizontal movement of the slider window panel  20  along the rails  22 ,  24 . Upper rail  22  may comprise any suitable channel or rail element configured to slidably receive an upper edge portion of the movable window panel, and upper rail  22  may comprise a channel or rail that may have a reduced profile and that does not include a resilient filler disposed therein because the upper rail of the rear slider window assembly of the present invention does not need substantially receive the upper edge region of the movable window panel therein during the installation or loading of the movable window panel at the window assembly, as discussed below. Optionally, the drive motor assembly may utilize aspects of the drive assemblies of the types described in U.S. Pat. Nos. 4,920,698; 4,995,195; 5,146,712; 5,531,046; 5,572,376; 6,955,009 and/or 7,073,293, and/or U.S. patent application Ser. No. 10/454,040, filed Jun. 4, 2003, published Feb. 5, 2004 as U.S. Publication No. 2004-0020131; and/or Ser. No. 11/948,094, filed Nov. 30, 2007, published Jun. 5, 2008 as U.S. Publication No. 2008-0127563, which are all hereby incorporated herein by reference in their entireties. 
         [0032]    Optionally, the window assembly or assemblies of the present invention may utilize aspects of the window assemblies described in U.S. Pat. Nos. 7,073,293; 7,003,916; 6,119,401; 6,026,611; 5,996,284; 5,799,444 and/or 6,691,464, and/or U.S. patent application Ser. No. 11/263,221, filed Oct. 31, 2005 and published May 25, 2006 as U.S. Publication No. 2006-0107600; Ser. No. 11/948,094, filed Nov. 30, 2007, published Jun. 5, 2008 as U.S. Publication No. 2008-0127563; Ser. No. 10/454,040, filed Jun. 4, 2003 and published Feb. 5, 2004 as U.S. Publication No. 2004-0020131; Ser. No. 10/408,047, filed Apr. 4, 2003 and published Nov. 20, 2003 as U.S. Publication No. 2003-0213179, and/or Ser. No. 12/850,864, filed Aug. 5, 2010, now U.S. Pat. No. 8,402,695, and/or PCT Application No. PCT/US2011/051506, filed Sep. 13, 2011, and/or Japanese Publication No. 1219280, published on Sep. 1, 1989 and based on Japanese application 63[1988]-43514, filed on Feb. 26, 1988 by Motohiko Kitsukawa et al. of Hashimoto Forming Ind. Co. Ltd of Yokohama-shi Japan, all of which are hereby incorporated herein by reference in their entireties. Optionally, the fixed window panels and movable window panel may include one or more electrically conductive elements, such as heater grids or the like, which may be powered utilizing aspects of the window assemblies described in U.S. patent application Ser. No. 12/850,864, filed Aug. 5, 2010, now U.S. Pat. No. 8,402,695, and/or PCT Application No. PCT/US2011/051506, filed Sep. 13, 2011, which are hereby incorporated herein by reference in their entireties. Although shown and described as a horizontally movable center window that moves relative to a pair of opposite side windows (such as for applications at the rear of a cab of a pickup truck or the like), it is envisioned that the present invention is applicable to other types of movable window assemblies, such as horizontally movable window panels that move relative to a single fixed window panel and/or frames (such as for a rear or side opening of a vehicle or the like), and/or such as vertically movable window panels that move relative to one or more fixed panels and/or frames (such as for a rear or side opening of a vehicle or the like), while remaining within the spirit and scope of the present invention. 
         [0033]    In the illustrated embodiment, channel member or channel  26  comprises a generally U-shaped channel that is arranged generally horizontally across the rear slider window assembly. Channel  26  may be formed via any suitable forming means and may comprise any suitable material or materials. For example, channel  26  may comprise an extruded metallic channel (such as an extruded aluminum channel or the like) or a steel roll form or a rigid or substantially rigid molded or extruded polymeric channel (such as a polyvinylchloride material or the like) and if polymeric, preferably a rigid polymeric material. As shown in  FIG. 4 , the channel  26  is an elongated generally U-shaped channel having a base or lower wall  26   a  and a pair of spaced apart generally vertical walls  26   b,    26   c  extending upwardly from the base or lower wall  26   a.  The channel  26  may include a plurality of apertures or holes or drain-ways  26   d  established at and through the lower wall  26   a  (and/or through other walls thereof) to facilitate drainage of water or moisture from the channel  26 . As shown in  FIGS. 2 and 3 , channel  26  extends substantially across the rear slider window assembly  10  and extends at least partially or substantially along the lower regions of both of the fixed window panels  16 ,  18 . 
         [0034]      FIG. 2B  shows a prior art construction as disclosed and taught in Japanese Publication No. 1219280, published on Sep. 1, 1989 and based on Japanese application 63[1988]-43514, filed on Feb. 26, 1988 by Motohiko Kitsukawa et al. of Hashimoto Forming Ind. Co. Ltd of Yokohama-shi Japan, which is hereby incorporated herein by reference in its entirety. As can be seen in the prior art sliding window assembly suitable for use in a vehicle shown in  FIG. 2B , a slide window panel  3 ′ is accommodated in a sash  12 ′ of the sliding window assembly. A window panel holder  4 ′ is made of a synthetic resin having a lubricating property (such as polyamide or polyacetal) and is fixed at the lower end of slide window panel  3 ′ by using adhesive  15 ′. Window panel holder  4 ′ is installed at two places in the lower end of slide window panel  3 ′. However, it can also be arranged over the entire length. A guide channel  16 ′ is arranged such that the lower end of slide window panel  3 ′ and window panel holder  4 ′ can be accommodated in it in a slidable manner. Guide channel  16 ′ forms part of sash  12 ′. It is welded along with a retainer to a bracket  18 ′ using welding part  17 ′. Bracket  18 ′ is used to install the sliding window assembly on a door of the equipped vehicle. Guide channel  16 ′ is formed into a U-shape by bending a metal plate. Its upper end is bent inwards to form inwardly turned or formed lips or tabs  16   a ′. It has an interior slide groove  19 ′ and has an opening part at the top. Window panel holder  4 ′ slides in slide groove  19 ′. In order to facilitate the sliding, protrusions  21 ′ contacting the inner walls of guide channel  16 ′ are formed on both sides of the bottom part and on both side parts to reduce the sliding resistance, and to reduce accumulation of foreign matter accommodating space  22 ′. An engagement recessed part  29 ′ that accommodates and engages with connection member  6 ′ and an accommodating recessed part that accommodates element bar  7 ′ are arranged at the bottom of window panel holder  4 ′. Element bar  7 ′ is made of a wire, etc. Its two ends are inserted into a tube-shaped connection member  6 ′ to form an endless shape. A connection member  6 ′ is accommodated and engaged with the engagement recessed part  29 ′ of window panel holder  4 ′. 
         [0035]    As can be seen by comparison of the prior art construction shown in  FIG. 2B  to an embodiment of the present invention shown in  FIG. 2A , the construction shown in  FIG. 2A  is that of  FIG. 2B  with additional improvement of the present invention relating to manufacture and assembly of the window. 
         [0036]    As shown in  FIG. 2A , guide element  28  is formed separate from formation of channel  26  (and may be, and preferably is, formed of a material that is distinct and different from the material used to from channel  26 ). Preferably, guide element  28  is a polymeric molding formed in an injection molding operation. Guide element  28  is formed, preferably via injection molding, to have a generally U-shaped guide portion  28   a  with a pair of lower protrusions  28   b  extending downwardly therefrom and also to include inwardly turned or formed lips or tabs  28   d.    
         [0037]    In a separate forming operation (such as, for example, a metal extrusion operation such an aluminum extrusion or the like), channel  26  is formed to have an elongated generally U-shaped channel having a base or lower wall  26   a  and a pair of spaced-apart generally vertical walls  26   b,    26   c  extending upwardly from the bottom or base or lower wall  26   a,  preferably including a plurality of apertures or holes or drain-ways  26   d  established at and through the lower wall  26   a  (and/or through other walls thereof) to facilitate drainage of water or moisture from the channel  26  (such as by utilizing aspects of the window assemblies described in PCT Application No. PCT/US2011/051506, filed Sep. 13, 2011 and published Mar. 22, 2012 as International Publication No. WO 2012/037190, which is hereby incorporated herein by reference in its entirety). Unlike the construction of guide element  28 , the upper portion of the vertical walls  26   b,    26   c  do not have any inwardly turned or formed lips or tabs of any sort. 
         [0038]    Forming guide element  28  in a separate operation from formation of channel  26  has several advantages. Guide element  28  may be formed of a different material than what is used to form channel  26  (for example, a polymeric material versus a metal) and guide element  28  may be formed by a different manufacturing method than what is used to form channel  26  (for example, polymer injection molding versus metal extrusion). By forming guide element  28  in a separate operation from formation of channel  26 , tooling complexity is reduced and the cost and complexity to manufacture can also be reduced. Guide element  28  can also be readily formed to have a length dimension shorter than that of channel  26  (for example, guide element  28  may have a length dimension that is about half the length dimension of channel  26 , and preferably the length dimension of guide element  28  is less than the length dimension of channel  26  by at least the length dimension of carrier  30 ). 
         [0039]    Once separately formed, guide element  28  is inserted into channel  26  (such as is illustrated in  FIGS. 8 and 9 ) and then is secured and fixed in channel  26 , such by adhesive gluing (using for, example, an epoxy adhesive or a silicone adhesive or a urethane adhesive) or by mechanical attachment. As illustrated such as in  FIG. 9 , when secured and fixed in channel  26 , guide element  28  preferably extends from one end of channel  26  partially but not fully towards the other end of channel  26 , leaving a portion of channel  26  unoccupied by guide element  28 . This unoccupied portion of channel  26  thus facilitates (such as shown in  FIGS. 9 and 10 ) insertion of carrier  30  (with movable window panel  20  inserted and secured therein or thereto) into channel  26  and guide element  28 . 
         [0040]    Thus, and as shown in  FIG. 2A , channel  26  may be insert molded or otherwise disposed to be fixed or secured in a channel portion  32   a  of a lower frame or mounting element  32 , which is configured to mount to the sheet metal or body or the like of the vehicle (such as via use of an adhesive or the like disposed at an attaching portion  32   b  of mounting element  32 ). Mounting element  32  may comprise any suitable material and may be formed via any suitable forming means, and may have a seal retaining portion or channel  32   c  for receiving and retaining a sliding seal  34  for slidably sealing against the surface of the movable window panel  20  as the movable panel  20  is moved between its opened and closed positions and for sealing against the surface of the movable window panel  20  when it is in its closed position or its opened position. The outer surface  32   d  of mounting element  32  may be generally flush with the outer surface of the fixed window panels at the opposed ends or edge regions of the fixed window panels or the mounting element may extend over the outer surface of the fixed window panels to provide a generally uniform outer frame portion at and along the surfaces of the fixed window panels and across the opening between the fixed window panels where the movable window panel is disposed when in its closed position (and optionally, the mounting element may be molded or formed with polycarbonate window panels such as by utilizing aspects of the rear slider window assemblies described in PCT Application No. PCT/US2011/051506, filed Sep. 13, 2011 and published Mar. 22, 2012 as International Publication No. WO 2012/037190, which is hereby incorporated herein by reference in its entirety). 
         [0041]    Mounting element  32  may be molded of a polymeric material and channel  26  may be insert molded in mounting element  32 . Because channel  26  comprises generally straight walls  26   b,    26   c,  the mold that forms mounting element  32  may be formed to support the wall  26   b  at its inner surface to limit or substantially preclude inward flexing or bending or warping of the wall  26   b  during the injection molding process that forms the mounting element  32  around the wall  26   b  and lower wall  26   a  of channel  26 . Thus, the present invention provides enhanced molding or forming of the mounting element around or partially around the channel  26  and may achieve reduced scrap, at least in part because of the straight wall  26   b  of U-shaped channel  26  without any protrusions and without any inwardly turned or formed lips or tabs or the like along its inner surface or at the top of its side walls. Mounting element  32  may also include one or more holes or drainage channels or the like for draining water or moisture from guide element  28 , channel  26  and mounting element  32 . Optionally, the rear slider window assembly may include one or more water drainage conduits such as the types described in PCT Application No. PCT/US2011/051506, filed Sep. 13, 2011 and published Mar. 22, 2012 as International Publication No. WO 2012/037190, which is hereby incorporated herein by reference in its entirety. 
         [0042]    When the window is assembled, guide element  28  is received in channel  26  and extends partially along channel  26 . For example, the length dimension of guide element  28  is selected so as to extend substantially along one of the fixed window panels  16  to provide guidance and support for the movable window panel  20  and carrier  30  as the movable window panel is moved to its fully opened position and so as to extend substantially along the opening or gap between the fixed window panels  16 ,  18  to provide guidance and support for the movable window panel  20  and carrier  30  as the movable window panel is moved to its fully closed position. Guide element  28  does not extend along channel  26  at the other fixed window panel  18 , thereby providing clearance for insertion of carrier  30  into channel  26  for installation of (or removal of) the movable window panel  20 , as discussed below. 
         [0043]    Guide element  28  may comprise any suitable material and may be formed via any suitable means, such as, for example, by extrusion of a metallic material or polymeric material or by molding (such as by injection molding) of a polymeric material. Guide element  28  may comprise the same material as channel  26  or may comprise a different material, depending on the particular application of the rear slider window assembly. In the illustrated embodiment, and as shown in  FIG. 5 , guide element  28  comprises a generally U-shaped guide portion  28   a  with a pair of lower protrusions  28   b  extending downwardly therefrom. As shown in  FIG. 2A , guide element  28  is received and then secured/fixed in channel  26  with protrusions  28   b  resting at lower wall  26   a  in channel  26 . The guide portion  28   a  receives carrier  30  therein and the upper ends of the walls  28   c  of guide portion  28   a  have inwardly turned or formed lips or tabs  28   d  to define an opening or gap therebetween, along which the slidable window panel  20  is moved as it moves between its opened and closed positions. As shown in  FIG. 5 , guide element  28  may also include one or more openings or drainage passageways  28   e  for draining water or moisture from the guide element  28 . When movable window panel  20  is moved to open or close when normally mounted in the equipped vehicle, it is supported solely by the bottom wall of guide portion  28   a  as the bottom of carrier  30  slides along the bottom wall of guide portion  28   a.  When movable window panel  20  is moved to open or close when normally mounted in the equipped vehicle and while carrier  30  slides along the bottom wall of guide portion  28   a,  carrier  30  makes no contact with, and is never supported by, inwardly turned or formed lips or tabs  28   d.  Inwardly turned or formed lips or tabs  28   d  do not at least partially support carrier  30  and inwardly turned or formed lips or tabs  28   d  do not hold the carrier  30  in position so as to keep carrier  30  from falling, sinking or slipping. Inwardly turned or formed lips or tabs  28   d  do not at least partially support carrier  30 . 
         [0044]    Carrier  30  has a slot or receiving portion  30   a  therealong that is configured to receive the lower edge region  20   a  of movable window panel  20  (and be secured and fixed thereto such as via adhesive attachment) to movably support the lower edge region of the movable window panel  20  along the guide element  28  and channel  26  (and optionally, the carrier may be molded or formed with a polycarbonate window panel such as by utilizing aspects of the rear slider window assemblies described in PCT Application No. PCT/US2011/051506, filed Sep. 13, 2011 and published Mar. 22, 2012 as International Publication No. WO 2012/037190, which is hereby incorporated herein by reference in its entirety). In the illustrated embodiment, and as shown in  FIG. 6 , carrier  30  comprises a generally U-shaped receiving portion  30   a,  with end portions  30   b  formed at each end of carrier  30  for attaching the carrier to the cables of the powered drive system. For example, the end portions  30   b  of carrier  30  may have a slot or opening  30   c  formed therein that is shaped to receive an enlarged end cap of a cable therein, while the narrower cable (that is narrower than its end cap) extends through a narrower portion of the slot or opening  30   c  formed at the end of the carrier  30 . Thus, when either cable or cable end is moved to pull at the carrier, the carrier is pulled in the appropriate direction to open or close the movable window panel  20 . Carrier  30  may be formed via any suitable forming means and may comprise any suitable material or materials, while remaining within the spirit and scope of the present invention. 
         [0045]    As can be seen in  FIG. 7 , the length of carrier  30  is less than the length of guide element  28 , which has a length that is less than the length of channel  26 . As shown in  FIGS. 8 and 9 , carrier  30  receives the lower edge region of movable window panel  20  therein, while guide element  28  is received along a portion of channel  26 . Guide element  28  may be secured relative to and in channel  26  via any suitable attaching means, such as via an adhesive or tape or fasteners or the like. As can be seen with reference to  FIGS. 9-11 , when guide element  28  is received in and attached to channel  26 , channel  26  extends beyond the end of guide element  28  an amount sufficient to receive the carrier  30  therein when loading or unloading or installing/uninstalling the movable window panel at the rear slider window assembly. For example, a length dimension of the guide element  28  may be less than a length dimension of the channel  26  by at least a distance corresponding to a length dimension of the carrier  30 , so as to provide clearance for insertion of the carrier  30  into the channel  26  where the guide element  28  is not disposed, such as during loading or installation of the carrier and movable window panel. Thus, and as shown in  FIGS. 9 and 10 , the carrier  30  may be inserted into and received in the channel  26  where guide element  28  is not disposed, and may be inserted fully into channel  26  ( FIG. 10 ) to provide clearance for inserting the upper edge region (not shown in  FIG. 10 ) of movable window panel  20  in the upper channel of upper rail  22  of frame portion  14 . After the upper edge region of the movable window panel is received in the upper rail  22  of frame portion  14 , the carrier  30  may be raised upward in channel  26  ( FIG. 11 ) so as to align the carrier  30  with the receiving portion or guide portion  28   a  of guide element  28 . When so positioned and aligned, the carrier  30  may be moved into and along guide portion  28   a  of guide element  28  ( FIGS. 12 and 13 ) towards its closed position, whereby the cables of the powered drive system may be connected to the end regions  30   b  of carrier  30 . When the cables of the drive system are connected to the ends of the carrier, the cables and drive system control the movement of the carrier and movable window panel along the guide element  28  and limit or substantially preclude movement of the carrier and movable window panel beyond the ends of the guide element  28 , such that the carrier is supported by bottom wall of the guide portion of the guide element throughout the range of motion of the movable window panel and during operation of the drive system when the subject slider window assembly is normally mounted and used in the equipped vehicle. 
         [0046]    Although shown and described as comprising a pair of spaced apart fixed window panels with an opening established therebetween (and with upper and lower appliqués or trim or filler panels or elements disposed at the upper and lower regions of the opening and between the fixed window panels), the window assembly of the present invention may comprise a hole-in-glass window configuration, where a single fixed window panel has an aperture or hole or opening established therethrough. For example, and with reference to FIGS.  14  and  15 A-E, a rear slider window assembly  110  of a vehicle (such as a pickup truck or the like) includes a window frame  114 , a single fixed window panel  116  having an opening or aperture established or formed therethrough (such as described in PCT Application No. PCT/US2011/051506, filed Sep. 13, 2011 and published Mar. 22, 2012 as International Publication No. WO 2012/037190, which is hereby incorporated herein by reference in its entirety), and a movable window panel  120  that is movable relative to frame  114  and fixed window panel  116  between an opened position and a closed position. Frame  114  comprises an upper rail  122  and a lower rail  124 , with the upper and lower edge regions of movable window panel  120  slidably received in and along the respective upper and lower rails  122 ,  124 . Lower rail  124  comprises a generally U-shaped channel portion  126  that is disposed generally horizontally along the rear slider window (and adhered or bonded to the inner surface  116   a  of the fixed window panel  116 ) and spanning at least part of the fixed window panel  116 , with a guide element  128  received in and fixedly secured (such as by gluing or by mechanically securing) in channel  126  and extending only partially along channel  126 , such as extending along a portion of the fixed window panel  116  and the opening for the movable window panel  120 . The lower edge region  120   a  of the movable window panel  120  is received in or attached to a carrier  130 , which is movably received in guide element  128  and is movable or slidable along guide element  128  as the movable window panel  120  is moved between its opened and closed positions. Because the rail  122 , channel  126 , guide element  128  and carrier  130  may be similar to the respective components of the window assembly  10 , discussed above, a detailed discussion of these components and their functions need not be repeated herein. 
         [0047]    As shown in  FIG. 15A , the channel or channel portion  126  may be adhered or bonded to the inner surface  116   a  of the fixed window panel  116 , such as via an adhesive bond or adhesive layer  117  disposed at a recessed portion of the channel  126  or the like. A sealing element  134  may be disposed along the inner surface of the fixed window panel and at the lower perimeter of the opening (such as via adhesive bonding of the sealing element at the inner surface of the fixed window panel, and such as at an opaque coating or frit layer disposed or established at the fixed panel around the window opening) and generally above the rail  124 , to seal against the outer surface  120   b  of the movable window panel  120  and slidingly seal against the outer window panel surface as the movable window panel is moved between its opened and closed positions. 
         [0048]    As shown in  FIG. 15C , an upper sealing element  136  may be similarly disposed at or bonded at the inner surface of the fixed glass window panel  116  at and along the upper perimeter region of the window opening for sealing against an upper region of the movable window panel  120 . As also shown in  FIG. 15C , the upper edge portion  120   c  of movable window panel  120  may be received in the upper rail  122 , which may include a sealing element or sliding element  138  therein for facilitating sliding movement of the movable window panel  120  along the upper rail  122 . Upper rail  122  may be bonded or adhered to the inner surface of the fixed window panel such as in a similar manner as the lower rail  124 , discussed above. 
         [0049]    As shown in  FIGS. 15B and 15D , the window assembly includes sliding sealing elements  140 ,  142  at the inner surface  116   a  of the fixed window panel at the side perimeter regions of the window opening. For example, sealing element  140  ( FIG. 15B ) may comprise a Y-seal and may be adhered to the inner surface of the fixed window panel  116  so that its Y-seal lips or sealing elements slidingly engage the outer surface  120   b  of the movable window panel  120  as it is moved in either direction between its opened and closed positions. Similarly, sealing element  142  ( FIG. 15D ) may be adhered to the inner surface of the fixed window panel  116  and may comprise a pair of sealing lips or elements that slidingly engage the outer surface  120   b  of the leading edge region of the movable window panel  120  as it is moved towards and into its closed position and moved from its closed position. As can be seen with reference to  FIG. 14 , when the movable window panel is moved from its closed position towards its open position, the movable window panel will be disengaged from sealing element  142 . 
         [0050]    Optionally, the rear slider window assembly  110  may include one or more water drainage conduits  144  ( FIG. 15E ), in order to facilitate draining of water from the lower rail  124  and channel  126 . The water drainage elements or conduits may comprise any suitable elements, and may utilize aspects of the elements and window assemblies described in PCT Application No. PCT/US2011/051506, filed Sep. 13, 2011 and published Mar. 22, 2012 as International Publication No. WO 2012/037190, which is hereby incorporated herein by reference in its entirety. For example, and with reference to  FIG. 15E , the water drainage conduit  144  may be formed with or integrally formed or molded with the lower rail  124 , such that a passageway  144   a  is established between a portion of the rail  124  and the inner surface  116   a  of the fixed window panel  116 . The water drainage conduit  144  may provide side walls along the passageway  144   a  that may be adhered or bonded to or engaged with the inner surface  116   a  of the fixed window panel  116 , such as described in PCT Application No. PCT/US2011/051506, filed Sep. 13, 2011 and published Mar. 22, 2012 as International Publication No. WO 2012/037190, which is hereby incorporated herein by reference in its entirety. 
         [0051]    The window assembly  110  thus may provide a flush exterior surface with a single fixed window panel, with the movable panel movable along and behind the single fixed window panel between its opened and closed positions. The fixed window panel  116  may include an opaque coating or layer or frit layer or the like disposed about its perimeter and around the edges that bound the window opening, in order to conceal or hide or render covert the rails and sealing elements disposed at the fixed panel. Likewise, the movable window panel  120  may include an opaque coating or layer or frit layer or the like disposed about its perimeter regions, in order to conceal or hide or render covert the sealing elements disposed at the fixed panel, such as when the movable window panel is in its closed position. 
         [0052]    Thus, the rear slider window assembly of the present invention provides a lower channel and guide and carrier construction that facilitates insertion or loading of the movable window panel at the side of the rear slider window assembly opposite the side that the movable window panel is moved towards when moved towards its opened position. The rear slider window assembly of the present invention provides for easier loading and unloading of the movable window panel and does so without a larger upper rail or channel and filler material that is typically used in conventional slider window assemblies to allow for greater insertion of the upper edge region of the movable window panel during the insertion or loading process. The rear slider window assembly of the present invention also provides for enhanced molding or forming processes in forming the lower mounting element at and at least partially around the lower metallic or substantially rigid plastic channel and limits or reduces scrap that may otherwise occur in prior conventional constructions due to warping or bending of the walls of the channel during the overmolding processes (due to the non-straight inner surfaces of the prior conventional channel constructions). 
         [0053]    Thus, for example, and in accordance with the present invention, a channel assembly is formed from two separate parts, where a guide element is separately formed and a generally U-shaped channel is separately formed, and the guide element is secured and fixed into the channel as is shown in  FIGS. 9-13 . This differs from the prior art illustrated in  FIG. 2B , where the prior art guide channel is formed in a single forming or manufacturing operation that includes formation of the inwardly turned or formed lips or tabs at the top of the sidewalls of the prior art guide channel. Moreover, in accordance with the present invention, the portion of the generally U-shaped channel that is unoccupied by the guide element when the window assembly is fully assembled serves no support function for the guide element or carrier and is not occupied by the guide element or carrier after the guide element is inserted into and secured/fixed in the generally U-shaped channel and after the carrier is inserted into the guide element during the initial assembly of the slider window assembly. 
         [0054]    The benefits of embodiments of the present invention may also be realized in sliding window constructions where an aperture is created in a fixed window panel and where a movable window panel can be made to open or close the aperture. Slider windows of this type are disclosed such as in U.S. patent application Ser. No. 10/408,047, filed Apr. 4, 2003, published Nov. 20, 2003 as U.S. Publication No. 2003-0213179, and/or such as in RE41502, and/or such as in PCT Application No. PCT/US2011/051506, filed Sep. 13, 2011 and published Mar. 22, 2012 as International Publication No. WO 2012/037190, which are hereby incorporated herein by reference in their entireties. 
         [0055]    The benefits of embodiments of the present invention may also be realized in vehicular movable window assemblies other than a rear slider window assembly for a pickup truck or the like, such as (for example) a slider window assembly suitable for use as a movable side window for a vehicle such as a van or a bus. 
         [0056]    Changes and modifications to the specifically described embodiments may be carried out without departing from the principles of the present invention, which is intended to be limited only by the scope of the appended claims, as interpreted according to the principles of patent law.