Seating arrangement

• US 10,021,984 B2
• Filed: 04/12/2016
• Issued: 07/17/2018
• Est. Priority Date: 04/13/2015
• Status: Active Grant

• Current Assignee: Steelcase Incorporated
• Original Assignee: Steelcase Incorporated
• Inventors: Ludwig, James Nolan, Deevers, Nickolaus William Charles, Heidmann, Kurt, Smith, Bruce Michael, Spoelhof, Mark William
• Primary Examiner(s): Allred, David E
• Application Number:
  US15/096,809
• Publication Number:
  US 20160296026A1
• Time in Patent Office: 826 Days
• Field of Search: None
• CPC Class Codes: A47C 1/03255 with a central column, e.g. rocking office chairs
• CPC Class Codes: A47C 1/03261 characterised by elastic means
• CPC Class Codes: A47C 3/12 with shell-shape seat and back-rest unit, e.g. having arm rests
• CPC Class Codes: A47C 7/445 with bar or leaf springs
• CPC Class Codes: A47C 7/54 Supports for the arms

Abstract

A seating arrangement includes an upwardly-extending back arrangement movable between an upright and reclined positions, and a seat arrangement that includes a first link member extending horizontally and having forward and rearward portions, a second link member spaced from the first link member, a third link member coupled to the first and second link members and substantially flexible along a majority of a length thereof, and a fourth link member operably coupled to the first and second link members, the fourth link member being substantially rigid along a majority of a length thereof, wherein the link members cooperate to form a linkage arrangement, and wherein the seat arrangement moves in a rearward direction as the back arrangement is moved between the upright position and the reclined position.

Claims

1. A seating arrangement, comprising:

an upwardly extending back arrangement movable between an upright position and a reclined position; and

a seat arrangement, comprising;

a first link member extending substantially horizontally, the first link member having a forward portion that includes a flexible region and a rearward portion and configured to support a seated user thereon;

a second link member spaced from the first link member;

a third link member coupled to the forward portion of the first link member proximate the flexible region of and flexibly coupled to the second link member, wherein the third link member is more rigidly coupled to the first link member than to the second link member, the third link member being substantially flexible along a majority of a length thereof; and

a fourth link member coupled to each of the rearward portion of the first link member and to the second link member, the fourth link member being substantially more rigid than the third link; and

wherein the first link member, the second link member, the third link member and the fourth link member cooperate to form a compliant four-bar linkage arrangement, and wherein the seat arrangement moves in a rearward direction as the back arrangement is moved between the upright position and the reclined position.

2. The seating arrangement of claim 1, further comprising:

an integral, single-piece first shell member that includes a first portion of the back arrangement and the first link member of the seat arrangement.

3. The seating arrangement of claim 2, further comprising:

an integral, single-piece second shell member that includes a second portion of the back arrangement and the second link member of the seat arrangement.

4. The seating arrangement of claim 3, wherein the first shell member includes an arcuately-shaped first transition region located between the first portion of the back arrangement and the first link member.

5. The seating arrangement of claim 4, wherein the second shell member includes an arcuately-shaped second transition region located between the second portion of the back arrangement and the second link member.

6. The seating arrangement of claim 5, wherein the third link member and the second shell member are an integral, single-piece.

7. The seating arrangement of claim 1, wherein the first shell member comprises a poly material.

8. The seating arrangement of claim 2, wherein the second shell member comprises carbon fiber.

9. The seating arrangement of claim 1, wherein the fourth link comprises carbon fiber.

10. The seating arrangement of claim 1, wherein the linkage arrangement comprises a four-bar arrangement.

11. The seating arrangement of claim 1, wherein the seating arrangement comprises an office chair assembly.

12. A seating arrangement, comprising:

a flexibly resilient first shell member having a horizontally-extending first portion and a second portion extending upwardly from the first portion, the first portion configured to support a seated user and including a flexible tab member configured to flex independently from a majority of the first shell member, and the second portion configured to move between an upright position and a reclined position;

a second shell member having a horizontally extending first portion at least partially spaced from the first portion of the first shell member;

a first support member extending between and supporting the first portion of the first shell member from the first portion of the second shell member, wherein the first support member is rigidly attached to the tab member of the first portion of the first shell member, wherein the tab member is more flexible than and flexes a greater amount than a majority of the first portion of the first shell member as the second portion of the first shell member is moved from the upright position to the reclined position, and wherein the first support member is flexibly attached to second shell member such that the first support member is more rigidly attached to the tab member of the first shell member than to the second shell member; and

a second support member rigidly coupled to each of the first shell member and the second shell member, and supporting the first portion of the first shell member from the first portion of the second shell member, such that the first portion of the first shell member, the first portion of the second shell member, the first support member and the second support member cooperate to from a compliant four-bar linkage, wherein the second support member is substantially more rigid than the first support member.

13. The seating arrangement of claim 12, wherein the tab includes a portion having a reduced thickness that is less than a thickness of the majority of the first portion of the first shell member.

14. The seating arrangement of claim 13, wherein the portion of the tab having reduced thickness is located forward of a location at which the first support member is connected to the tab.

15. The seating arrangement of claim 12, wherein the first support member is flexibly resilient.

16. The seating arrangement of claim 12, wherein the second support member is located rearward of the first support element.

17. A seating arrangement, comprising:

a flexibly resilient first shell member having a horizontally-extending first portion and a second portion extending upwardly from the first portion, the second portion of the first shell member movable between an upright position and a reclined position;

a flexibly resilient second shell member having a horizontally extending first portion at least partially spaced from the first portion of the first shell member, and a second portion extending upwardly from the first portion of the second shell member and at least partially spaced from the second portion of the first shell member, wherein the first portion of the second shell member includes a reduced thickness region in which the thickness is less than a thickness of a majority of the first portion of the first shell member;

a flexibly resilient first support member extending between and supporting the first portion of the first shell member from the first portion of the second shell member, where the first support member includes a reduced thickness region where the thickness of the first support member is less than a thickness of a majority of the first support member; and

a substantially rigid second support member rigidly coupled to each of the first shell member and the second shell member, and supporting the first portion of the first shell member from the first portion of the second shell member such that the first portion of the first shell member, the first portion of the second shell member, first support member, and the second support member cooperate to form a compliant four-bar linkage arrangement; and

wherein the reduced thickness region of the first portion of the second shell member flexes more than the majority of the first portion of the second shell member and the reduced thickness region of the first support member flexes more than the majority of the first support member as the second portion of the first shell member moves from the upright to the reclined positions.

18. The seating arrangement of claim 17, wherein the reduced thickness region of the first support member is located proximate a lower end of the first support member.

19. The seating arrangement of claim 17, wherein the reduced thickness region of the first portion of the second shell member is located forward of a location at which the second support member connects to the second shell member.

20. The seating arrangement of claim 17, wherein the first portion of the first shell member includes a flexible tab member configured to flex independently from a majority of the first shell member, the first support member is connected to the tab, and wherein the tab flexes a greater amount than the majority of the first portion of the first shell member as the second portion of the first shell member is moved from the upright position to the reclined position.

21. The seating arrangement of claim 20, wherein the tab includes a portion having a reduced thickness that is less than a thickness of the majority of the first portion of the first shell member.

22. The seating arrangement of claim 21, wherein the portion of the tab having reduced thickness is located forward of a location at which the first support member is connected to the tab.

23. The seating arrangement of claim 17, wherein the seating arrangement comprises an office chair assembly.

24. A seating arrangement, comprising:

a base;

a lower support member having a substantially horizontal first portion coupled to the base, and a second portion extending upwardly and forwardly from the first portion, wherein the lower support member defines a first flexible region between the first and second portions and a second flexible region positioned rearwardly of the first flexible region;

an upper support member having a substantially horizontal third portion configured to support a seated user thereon and having a third flexible region therein, the upper support member spaced above the first portion and joined to the second portion at the third flexible region forwardly of the first flexible region; and

a substantially rigid fourth portion disposed between and coupled to each of the second flexible region and the third portion, wherein the fourth portion is more rigid than the second portion.

25. The seating arrangement of claim 24, wherein the upper support member includes a back portion extending upwardly from the third portion and moveable between an upright position and a reclined position, and wherein the third portion flexes at a position along a length thereof as the back portion is moved between the upright and reclined positions.

26. The seating arrangement of claim 25, wherein the position at which the upper support member flexes is located forwardly of a location at which the fourth portion is connected to the third portion.

27. The seating arrangement of claim 24, wherein the second portion is substantially flexible along a majority of a length thereof.

28. The seating arrangement of claim 24, wherein the first flexible region includes a reduced thickness that is less than a thickness of a majority of the second portion.

29. The seating arrangement of claim 24, wherein the second flexible region includes a reduced thickness that is less than a thickness of a majority of the first portion.

30. The seating arrangement of claim 24, wherein the third flexible region includes a reduced thickness that is less than a thickness of a majority of the third portion.

31. The seating arrangement of claim 24, wherein the seating arrangement comprises an office chair assembly.