Abstract:
A door furniture mounting assembly ( 10, 10 ′) including a relatively smaller rosette ( 12 ) with a handle side and a door side. The door side of the rosette ( 12 ) includes at least one exterior recess ( 24 ) adapted for rotational and axial engagement with at least one inwardly extending protuberance ( 32 ) on the door side of a relatively larger rosette sleeve ( 30 ).

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims priority to Australian Application No. 2008903791, filed Jul. 24, 2008, the disclosure of which is incorporated herein by reference. 
     FIELD OF THE INVENTION 
     The present invention relates to a door furniture mounting assembly for latch sets and knob sets. 
     BACKGROUND OF THE INVENTION 
     The door furniture of many latch sets and knob sets includes a round rosette with a handle or knob extending therefrom. The rosettes are commonly produced with outer diameters of approximately 55 mm and 65 mm. The two different sizes are available as some customers prefer 55 mm rosettes over 65 mm and vice versa for visual or aesthetic reasons. 
     Many doors are supplied with a 54 mm door furniture hole pre-drilled therein, in order to receive the cylindrical latch bodies of assemblies with 65 mm rosettes. In contrast, an assembly with a 55 mm rosette requires a 35 mm diameter hole, for receiving the latch body, and a pair of smaller, diametrically opposed, holes for receiving the rosette&#39;s mounting posts. If an assembly with a 55 mm rosette is used with a door with a 54 mm pre-drilled hole, it can fail by falling into the hole. 
     As a result of the above, door furniture manufacturers must, disadvantageously, maintain two inventories of componentry able to suit either assemblies with 55 mm or 65 mm rosettes respectively. 
     OBJECT OF THE INVENTION 
     It is the object of the present invention to substantially overcome or at least ameliorate the above disadvantage. 
     SUMMARY OF THE INVENTION 
     Accordingly, in a first aspect, the present invention provides a door furniture mounting assembly including: 
     a relatively smaller rosette with a handle side and a door side, the door side of the rosette including at least one exterior recess adapted for rotational and axial engagement with at least one inwardly extending protuberance on the door side of a relatively larger rosette sleeve. 
     In a second aspect, the present invention provides a door furniture mounting assembly including: 
     a relatively smaller rosette with a handle side and a door side, the door side of the first inner rosette part including at least one exterior recess; and 
     a relatively larger rosette sleeve having at least one inwardly extending protuberance adapted to rotationally and axially engage with the at least one recess(es). 
     The rosette preferably includes 3 equiangularly spaced apart recesses. The rosette sleeve preferably includes 3 equiangularly spaced apart protuberances. 
     The recess(es) preferably extend from the door side through about half of the axial dimension of the rosette. The protuberance(s) preferably extend from the door side through about half of the axial dimension of the rosette sleeve. 
     The rosette is preferably adapted for mounting of a handle or knob thereto. 
     The rosette includes an engagement means, preferably an O-ring in a groove, adapted for an interference fit engagement with a relatively smaller decorative cap. The O-ring and groove are preferably on the handle side of the rosette. 
     The rosette sleeve includes an engagement means, preferably an O-ring in a groove, adapted for an interference fit engagement with a relatively larger decorative cap. The O-ring and groove are preferably on the handle side of the rosette sleeve. 
     The rosette is preferably substantially cylindrical. The rosette sleeve is preferably substantially cylindrical, and has an inner diameter that is slightly larger than the outer diameter of the rosette. 
     The rosette preferably includes a notch adapted to allow a privacy snib actuator therethrough. The rosette sleeve preferably includes a notch adapted to allow a privacy snib actuator therethrough. The relatively smaller decorative cap preferably includes a notch adapted to allow a privacy snib actuator therethrough. The relatively larger decorative cap preferably includes a notch adapted to allow a privacy snib therethrough. 
     In use, the rosette sleeve is preferably secured to the door by being sandwiched between the door and the rosette. 
     The axial thickness of the rosette and the rosette sleeve are preferably approximately equal. The axial thickness of the smaller decorative cap and the larger decorative cap are preferably approximately equal. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       A preferred embodiment of the present invention will now be described, by way of an example only, with reference to the accompanying drawings in which: 
         FIG. 1  is an exploded front perspective view of an embodiment of a door furniture mounting assembly configured for use with a 55 mm rosette; 
         FIG. 2  is a rear exploded perspective view of the assembly shown in  FIG. 1 ; 
         FIG. 3  is a front exploded perspective view of the assembly shown in  FIG. 1  configured for use with a 65 mm rosette; 
         FIG. 4  is a rear perspective view of the assembly shown in  FIG. 3 ; 
         FIG. 5   a  is an assembled front view of the assembly shown in  FIG. 1 ; 
         FIG. 5   b  is an assembled side view of the assembly shown in  FIG. 1 ; 
         FIG. 6   a  is an assembled front view of the assembly shown in  FIG. 3 ; and 
         FIG. 6   b  is an assembled side view of the assembly shown in  FIG. 3 . 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
       FIGS. 1 and 2  show an embodiment of a door furniture mounting assembly  10  configured for use with a 55 mm rosette. The assembly  10  includes a (relatively smaller) generally cylindrical rosette  12  having a pair of mounting posts  14  mounted thereto. The rosette  12  also has a spring-return lever handle  16  mounted thereto. The handle side of the rosette  12  includes an O-ring  18  within a groove adapted for an interference fit engagement with a decorative cap  20 . The rosette  10  and the cap  20  each includes a notch  22   a  and  22   b  respectively to allow the actuator of a privacy snib (not shown) to pass therethrough. 
     The above features of the assembly  10  are conventional and suitable for mounting to a door with an approximately 35 mm diameter hole in the conventional manner. The assembly  10  is installed on one side of a door and usually connected to a similar assembly mounted on the opposite side of the door, as is also conventional. 
     However, as shown in  FIGS. 1 and 2 , the door side of the rosette  12  also includes three equiangularly spaced-apart exterior recesses  24 , the purpose of which will be described in more detail below. The recesses  24  extend through about half the axial thickness of the rosette  12 . 
       FIGS. 3 and 4  show a reconfigured assembly  10 ′, similar to that shown in  FIGS. 1 and 2 , with the exclusion of the decorative cap  20 , and the inclusion of (relatively larger) rosette sleeve  30 . The rosette sleeve  30  has three of equiangularly spaced-apart inwardly projecting protuberances  32 . The rosette sleeve  30  also includes an O-ring  34  within a groove, for an interference fit engagement with a 65 mm outer diameter decorative cap  36 . The rosette sleeve  30  and the cap  36  also each include a notch  38   a  and  38   b  respectively for the, previously mentioned, actuator of a privacy snib (not shown) to pass therethrough. 
     The protuberances  32  of the rosette part  30  engage with the recesses  24  and serve to locate the rosette part  30  both rotationally and axially in relation to the rosette  12 . This engagement has several effects. 
     Firstly, the diameter of the assembly  10 ′ overall is increased so as to suit threaded engagement with the 65 mm diameter decorative cap  36 . The engagement between the protuberances  32  and the recesses  24  prevents the rosette sleeve  30  from rotating relative to the rosette  12 . 
     Secondly, the rosette sleeve  30  increases the rosette&#39;s diameter and makes it suitable for installation over a (pre-drilled) 54 mm diameter hole without risk of the assembly  10 ′ falling into a hole of that size. 
       FIGS. 5   a  and  5   b  show the assembly  10  configured for use with a 55 mm diameter rosette.  FIGS. 6   a  and  6   b  show the assembly  10 ′ configured with the rosette sleeve  30  for use with a 65 mm diameter rosette. As is evident from  FIGS. 6   a  and  6   b , the increase in the diameter of the rosette  36  is achieved without causing any increase in thickness of the overall assembly  10  compared to the overall assembly  10 ′. 
     The assemblies  10 ,  10 ′ have several advantages. Firstly, they allow door furniture manufacturer to greatly reduce their inventory by providing door furniture mounting assemblies with 55 mm and 65 mm rosettes that share the majority of their parts. Secondly, this shared componentry can be easily and quickly reconfigured from 55 mm rosette use to 65 mm rosette use by the addition of two relatively minor components (the rosette part  30  and the decorative cap  36 ). Thirdly, when configured as a 65 mm rosette, the assembly  10 ′ requires very little in the way of additional installation steps as the rosette sleeve  30  is secured by being sandwiched between the door and the rosette  12 . 
     Although the invention has been described with reference to a preferred embodiment, it will be appreciated by persons skilled in the art that the invention may be embodied in many other forms. For example, in another embodiment (not shown), one of the three recesses/protuberances is larger than the other two to ensure that rosette and the rosette sleeve are always assembled with their respective privacy snib actuator notches in alignment.