CHAIR

• US 3,656,808 A
• Filed: 06/09/1970
• Issued: 04/18/1972
• Est. Priority Date: 06/09/1970
• Status: Expired due to Term

• Current Assignee: Ching-Yu Chang
• Original Assignee: Ching-Yu Chang
• Inventors: Chang, Ching-Yu
• Primary Examiner(s): Gay, Bobby R.
• Assistant Examiner(s): Moore, Garry
• Application Number:
  US05/044,699
• Time in Patent Office: 679 Days
• Field of Search: 297/445,294,295,307,285,457 D15/1,1.2
• US Class Current: 297/451.4
• CPC Class Codes: A47C 5/06 Special adaptation of seat upholstery or fabric for attachment to tubular chairs
• CPC Class Codes: Y10S 297/11 Baby bouncer

Abstract

A chair characterized by a frame structure formed by a single frame member having a continuously curved shape. The frame member includes an arcuate planar floor engaging portion, an arcuate inclined riser portion, and an inclined arcuate seat support portion. A seat is suspended from the frame seat support portion and may be fabricated of flexible material such as fabric, or may be of a rigid material such as molded plastic.

Claims

1. A chair frame, comprising a generally helical single continuously curved rod-like member having a planar lowermost arcuate portion having a uniform radius of curvature adapted to rest upon a floor to support said member, and having an uppermost planar arcuate seat support portion having a uniform radius of curvature inclined to the plane of said lowermost arcuate portion.

2. A chair comprising a frame, and a seat, said frame comprising a single continuously curved rod-like frame member, said frame member including a horizontal arcuate planar floor engaging portion having a uniform radius of curvature, a planar arcuate riser portion having a uniform radius of curvature extending from one end of said floor engaging portion, the plane of said riser portion being inclined at an acute angle to that of said floor engaging portion, and a planar arcuate seat support portion having a uniform radius of curvature extending from the upper end of said riser portion, the plane of said seat support portion being inclined at an acute angle with respect to that of said floor engaging portion, the transitions between said adjoining frame portions comprising smoothly curved continuations of the arcs of said respective portions, said seat being peripherally supported by said arcuate seat support portion.

3. A chair frame comprising a single continuously curved rod-like frame member, said frame member including a horizontal arcuate planar floor engaging portion having a uniform radius of curvature, a planar arcuate riser portion having a uniform radius of curvature extending from one end of said floor engaging portion, the plane of said riser portion being inclined at an acute angle to that of said floor engaging portion, and a planar arcuate seat support portion having a uniform radius of curvature extending from the upper end of said riser portion, the plane of said seat support portion being inclined at an acute angle to that of said floor engaging portion, the transitions between said adjoining frame portions comprising smoothly curved continuations of the arcs of said respective portions.

4. A chair frame as claimed in claim 3 wherein the transition between sAid riser portion and said seat support portion is centered at the front of the chair.

5. A chair frame as claimed in claim 3 wherein the planes of each of said planar floor engaging, riser and seat support portions are perpendicular to a reference plane passing vertically through the chair frame along the front-to-rear axis thereof.

6. A chair frame as claimed in claim 3 wherein the radii of the arcuate frame portions are substantially equal.

7. A chair frame as claimed in claim 3 wherein said frame member is formed of a single metal rod.

8. A chair frame as claimed in claim 3 wherein said frame member is formed of a metal tube.

9. A chair frame as claimed in claim 3 wherein the arcuate extent of said floor engaging portion comprises approximately 215* , the arcuate extent of said riser portion comprises approximately 180* , and the arcuate extent of said seat supporting portion comprises approximately 325* .

10. A chair frame as claimed in claim 6, the transition between said floor engaging portion and said riser portion being centered at the rear of the chair.

11. A chair frame as claimed in claim 3 wherein said floor engaging portion extends beneath the front edge of said seat support portion.