Patent Publication Number: US-2009235451-A1

Title: Interchangeable upholstered furniture frame system

Description:
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT 
     Not Applicable 
     REFERENCE TO SEQUENCE LISTING, A TABLE, OR COMPUTER PROGRAM LISTING COMPACT DISK APPENDIX 
     Not Applicable 
     BACKGROUND OF THE INVENTION 
     1. Field of Invention 
     The present invention relates to furniture such as sofas, convertible sleepers, chairs, love seats and more particularly, to furniture that can be easily assembled and disassembled, and to upholstered furniture frame. 
     2. Description of the Related Art 
     Furniture that can be easily assembled and disassembled is known in the related art. Examples of such furniture are provided by U.S. Pat. No. 4,140,065 issued Feb. 20, 1979 to L. M. Chacon (modular furniture); U.S. Pat. No. 4,165,902 issued Aug. 28, 1979 to R. A. Ehrlich (knockdown upholstered furniture); U.S. Pat. No. 5,678,897 issued Oct. 21, 1997 to 3. C. Prestia (ready-to-assemble upholstered furniture); U.S. Pat. No. 5,890,767 issue Apr. 6, 1999 to Y. F. Chang (modular sofa); U.S. Pat. No. 6,241,317 issued Jun. 5, 2001 to J. Wu (modular chair construction) and both U.S. Pat. No. 6,367,880 issued Apr. 9, 2002 to A. G. Niederman et al. and U.S. Pat. App. Pub. No. US2002/0093235 published Jul. 18, 2002 on behalf of A. G. Niederman et al. (modular upholstered furniture construction). Such furniture-often referred to as modular furniture-provides two basic advantages over conventional furniture. First, it is easier to move than conventional furniture. For example, prior to assembly, modular furniture can be readily moved through restricted doorways, hallways and stairways whereas conventional furniture is often too bulky or heavy to pass easily through restricted spaces. And second, because it requires less space when disassembled, modular furniture is less expensive both to ship and to store than conventional furniture. U.S. Pat. No. 6,942,298 issued September 2005 to Harrison (Five-part furniture frame and method of assembly) However, despite its advantages, there are at least two recognized drawbacks of modular furniture. First, frames of all named modular furniture are made from solid wood and as a result they are heavy, expensive and labor-intensive. Moreover the named frames don&#39;t provide a possibility to install an unfolding sleeper. 
     SUMMARY OF THE INVENTION 
     The present invention is an interchangeable upholstered furniture frame comprising: a seat box frame, having a fabricated metal frame, plywood front panel, two side plywood panels; a plywood back frame; a left arm frame, and right arm frame. The invention allows for ease of assembly and makes possible an interchangeable installation of an unfolding sleeper mechanism or a standard seat without any modifications to the frame. Using of a combination of welded steel-frame and low-trunk plywood reduces frame&#39;s weight and cost, providing, at the same time, extra strength 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is an exploded view of the seat box frame and plywood back frame of the interchangeable upholstered furniture frame according to the present invention. 
         FIG. 2  is an elevation, perspective view of all parts of the interchangeable upholstered furniture frame. 
         FIG. 3  is an elevation, perspective view of a spring kind of a seat. 
         FIG. 4  is of then elevation, perspective view of the interchangeable upholstered furniture frame with prepared for using the foldable sleeper. 
         FIG. 5  is a cross-section of the interchangeable upholstered furniture frame with a complicated unfolding sleeper. 
     
    
    
     DETAILED DESCRIPTION OF DRAFTS 
     As follows is a description of the construction of the interchangeable upholstered furniture frame of the present invention with reference to the drawings. Moreover, hereunder in the drawings, in order to simplify the description of the method of a respective member are not necessarily drawn exactly to scale. Referring to  FIGS. 1-2  depict main parts of the interchangeable upholstered furniture frame Referring to  FIG. 3-5  depict variants of using of interchangeable upholstered furniture frame. 
       FIG. 1  shows a back bar of the fabricated metal frame  1 , cross-bars of the welded frame  2 , posts of the welded frame  3 , holes on the welded frame  4 , the front panel  5 , the side panels  6 , the back frame  7 , T-nuts  8 , holes on the side parts of back frame  9 , bolts  10 . 
       FIG. 2  shows the welded frame  1 , the front panel  2 , side panels  3 , the back frame  4 , the arm frames  5 . 
       FIG. 3  shows the fabricated metal frame  1 , the front panel  2 , side panels  3 , the back frame  4 , planar tension springs  5 . 
       FIG. 4  shows the seat box frame  1 , the back frame  2 , and the prepared for using foldable sleeper  3 . 
       FIG. 5  shows the welded frame  1 , the seat box frame  2 , the back frame  3 , the complicated foldable sleeper  4 , the pocket for a placement of a head part of the foldable sleeper.