Patent Publication Number: US-2023133461-A1

Title: Chair with a curvilinear frame

Description:
FEDERALLY SPONSORED RESEARCH 
     Not Applicable 
     SEQUENCE LISTING OR PROGRAM 
     Not Applicable 
     BACKGROUND 
     Field of Invention 
     This invention relates generally to a chair construction and more particularly to a chair construction which is relatively simple while providing a chair that is light in weight and which provides firm but comfortable support for the user. Further, this invention relates to a chair construction that contains a tubular frame that is continuously curvilinear thereby providing the user with three-dimensional movement allowing him/her to safely shift seating positions or simply rock the chair forwards and backwards or from side-to-side. 
     General Description of the Prior Art 
     Numerous chairs have been proposed in the prior art using metal frames, generally tubular, bent to form back and seat supports and providing some degree of resiliency in flexure for use. While many of these chairs have been simple and easy to manufacture, they also have had a number of disadvantages such as: 
     (1) They do not provide proper support for the user. 
     (2) They are often uncomfortable, especially when used for an extended period of time. 
     (3) They have been bulky to ship, even when disassembled. 
     (4) They tend to have multiple parts making assembly/reassembly difficult and time consuming. 
     (5) Production depended upon “bender technology” which involved delivering one labor-intensive bend at a time in heavy steel tubing. 
     Objects and Advantages 
     The present invention has been designed to address the foregoing problems found in the prior art. Accordingly, the objects and advantages of the present invention are:
         (1) To provide a chair having only two one-piece tubular frame elements.   (2) To provide a chair having only two one-piece tubular frame elements that have no linear (straight-line) runs.   (3) To provide a chair having only two one-piece tubular frame elements with curvilinear runs.   (4) To provide a chair that can be easily disassembled and shipped as four separate parts (two side frame members and two interchangeable seat/back elements.   (5) To provide a chair having a seat cushion and a back cushion that are identical parts and thereby interchangeable, less expensive to manufacture, and easier to store or ship.   (6) To provide a chair with side/back frames that are identical parts and thereby interchangeable, less expensive to manufacture, and easier to store or ship.   (7) To provide a chair that allows the back to move independently of the seat without the use of additional springs or mechanical devices.   (8) To provide a chair that allows the user to safely move in three dimensions while changing position or simply rocking the chair.   (9) To provide a chair that moves in multiple directions to match the moves of the human body.   (10) To provide a chair that allows the back, arms, and seat move independently of each other.   (11) To provide a chair with a flexible frame that allows the user to relieve built-up tension.       

     Further objects and advantages of my invention will become apparent from a consideration of the drawings and the ensuing description of the invention. 
    
    
     
       DRAWINGS 
       Drawing Figures 
         FIG.  1    is a left-front perspective of the chair with a curvilinear frame. 
         FIG.  2    is a left-side perspective of the present invention. 
         FIG.  3    is top plan view of the present invention. 
         FIG.  4    is a bottom plan of the present invention. 
         FIG.  5    is a front elevation view of the present invention. 
         FIG.  6    is a rear elevation view of the present invention. 
         FIG.  7    is a cross-sectional view of the chair with a curvilinear frame taken along line  1 - 1  in  FIG.  1   ; and 
         FIG.  8    is a cross-sectional view of the chair with a curvilinear frame taken along line  2 - 2  in  FIG.  1   . 
     
    
    
     REFERENCE NUMERALS IN DRAWINGS 
     
         
           10 —Side frame member 
           101 —Arm section 
           102 —Back section 
           103 —Leg section 
           104 —Base section 
           11 —Side frame screw hole 
           20 —Seat 
           21 —Seat screw hole 
           22 —Right edge 
           23 —Right edge 
           30 —Back 
           32 —Right edge  32 —Left edge 
           33 —Back screw hole 
           40 —Screw 
       
    
     DETAILED DESCRIPTION 
     Description—Preferred Embodiment 
       FIG.  1    shows a perspective view of the preferred embodiment of the present invention. Side frames  10  are attached to back  30  by screws  40  in side frame screw holes  1 I and to seat  20  by seat screw holes  21 . For clarity side frame screw holes  11  and seat screw holes  21  are omitted from the embodiment of  FIG.  21   . Side frames  10  each include an arm section  101 , back section  102 , leg section  103 , and base section  104 , all of which are curved.  FIG.  2    is a left-side perspective of the present invention.  FIG.  3    is top plan view of the present invention.  FIG.  4    is a bottom plan of the present invention.  FIG.  5    is a front elevation view of the present invention.  FIG.  6    is a rear elevation view of the present invention.  FIG.  7    is a cross-sectional view of the chair with a curvilinear frame taken along line  1 - 1  in  FIG.  1   .  FIG.  8    is a cross-sectional view of the chair with a curvilinear frame taken along line  2 - 2  in  FIG.  1   . 
     Key Points: 
     (1) Preferred material is high strength aluminum freedom tubing formed by a single-stroke tube-bending technology. Other construction materials possible.
 
(2) Lightweight, flexible, strong, seating parts. Interchangeable with back.
 
(3) Seating and back material: bespoke weave, produced with 3D CNC knitting technology—breathable. Long-lasting seating support.
 
(4) Two component parts. Extreme simplicity. Easy to store, ship. Interchangeability means fewer supply-chain problems.
 
(5) Side-frame members similarly configured.
 
(6) Seat and back members identically configured and interchangeable.
 
(7) Unique configuration of side frame members allows for upward or downward movement of the seat while maintaining the same arm/seat relationship regardless of back or seat movement.
 
(8) Single-stroke forming process allows for a transition from small to large radius bends without the need for any straight section or runs.
 
(9) Curvilinear sections—continuously curving—no straight sections—no angular bends.
 
(10) Delivers comfort and adapts to the user&#39;s movements as the seat and back flex.
 
(11) The use of aluminum side support frames (e.g., side frames  10 ) provides aesthetic beauty in a lightweight minimalist design.
 
     Operation—Preferred Embodiment 
     A user may sit on seat  20  and enjoy freedom of movement in all direction as side frames  10  move with the user. 
     Conclusion, Ramifications, and Scope 
     The present invention as described herein has been designed to address the problems found in the prior art. Accordingly, the objects and advantages of the present invention are:
         (1) To provide a chair having only two one-piece tubular frame elements. To provide a chair having only two one-piece tubular frame elements that have no linear (straight-line) runs.   (2) To provide a chair having only two one-piece tubular frame elements with curvilinear runs.   (3) To provide a chair that can be easily disassembled and shipped as four separate parts (two side frame members and two interchangeable seat/back elements.   (4) To provide a chair having a seat cushion and a back cushion that are identical parts and thereby interchangeable, less expensive to manufacture, and easier to store or ship.   (5) To provide a chair with side/back frames that are identical parts and thereby interchangeable, less expensive to manufacture, and easier to store or ship.   (6) To provide a chair that allows the back to move independently of the seat without the use of additional springs or mechanical devices.   (7) To provide a chair that allows the user to safely move in three dimensions while changing position or simply rocking the chair. This includes leaning backwards or forward, rocking backwards or forward, twisting from side-to-side, and flexing the seat upwards or downward.