Support assembly for a seating structure

• US 6,702,390 B2
• Filed: 09/26/2002
• Issued: 03/09/2004
• Est. Priority Date: 06/15/1992
• Status: Expired due to Term

• Current Assignee: Herman Miller Incorporated
• Original Assignee: Herman Miller Incorporated
• Inventors: Sayers, Randy J., Schoenfelder, Rodney C., Cammenga, Eric, Keller, Carolyn, Chadwick, Donald, Bruner, Jeffrey W., Stumpf, William E., Coffield, Timothy P.
• Primary Examiner(s): Nelson, Jr., Milton
• Application Number:
  US10/256,125
• Publication Number:
  US 20030034682A1
• Time in Patent Office: 530 Days
• Field of Search: 297/440.1, 297/440.11, 297/440.2, 297/440.22, 297/452.18, 297/452.13, 297/452.38, 297/452.56, 297/452.64, 297/452.63, 297/218.1, 297/DIG.2
• US Class Current: 297/452.56
• CPC Class Codes: A47C 1/03 the parts being arm-rests conversion into a bed A47C17/12
• CPC Class Codes: A47C 1/0303 adjustable rectilinearly in vertical direction
• CPC Class Codes: A47C 1/03238 by means of peg-and-notch or pawl-and-ratchet mechanism
• 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 3/30 with vertically-acting fluid cylinder
• CPC Class Codes: A47C 5/06 Special adaptation of seat upholstery or fabric for attachment to tubular chairs
• CPC Class Codes: A47C 7/029 of non-adjustable shape adapted to a user contour or ergonomic seating positions
• CPC Class Codes: A47C 7/14 of adjustable shape; elastically mounted ; adaptable to a user contour or ergonomic seating positions movably-coupled seat and backrests with elastic adjustment means A47C1/03261; elastically-mounted back-rests or backrest-seat units in the base frame A47C7/44
• CPC Class Codes: A47C 7/282 with mesh-like supports, e.g. elastomeric membranes
• CPC Class Codes: A47C 7/40 for the back
• CPC Class Codes: B29C 45/14065 Positioning or centering articles in the mould
• CPC Class Codes: B29C 45/14631 Coating reinforcements fibre reinforcements B29C45/0005
• CPC Class Codes: B29K 2713/00 Use of textile products or fabrics for preformed parts, e.g. for inserts B29K2105/06 takes precedence
• CPC Class Codes: B29L 2031/443 Chairs
• CPC Class Codes: Y10T 29/49863 with prestressing of part
• CPC Class Codes: Y10T 29/49867 of skin on frame member
• CPC Class Codes: Y10T 29/4998 Combined manufacture including applying or shaping of fluent material
• CPC Class Codes: Y10T 29/49998 Work holding
• CPC Class Codes: Y10T 403/32475 having detent
• CPC Class Codes: Y10T 442/3024 : Including elastic strand or strip

Abstract

A seating structure includes a support assembly for supporting the body of a user. The support assembly includes a frame member defining an opening and having a channel formed around at least a portion of a perimeter of the opening and an expandable carrier member expandable between at least a first and second configuration. The carrier member is inserted into the channel when expanded to the second configuration. A membrane of elastic material covers the central opening. The membrane has an edge, at least a portion of which is attached to the carrier member. The membrane is stretched a desired amount as the carrier member is expanded between the first and second configurations. A method of assembling a seating structure is also provided.

Claims

1. A support assembly for supporting a body of a user in a seating structure, the support assembly comprising:

a rigid frame member;

an expandable, semi-rigid carrier member expandable between at least a first and second configuration, wherein said carrier member is attached to said frame member when expanded to said second configuration; and

a membrane of elastic material comprising an edge, wherein at least a portion of said edge is molded with said carrier member, wherein said membrane is stretched a desired amount as said carrier member is expanded between said at least said first and second configurations.

2. The support assembly of claim 1 wherein said carrier member engages said frame member with a snap-fit.

3. The support assembly of claim 1 wherein said membrane is see-through.

4. The support assembly of claim 1 wherein said frame member defines an opening and comprises a channel formed around at least a portion of a perimeter of said opening, and wherein said carrier member is inserted into said channel when expanded to said second configuration.

5. The support assembly of claim 4 wherein said perimeter comprises a first perimeter, wherein said channel is formed round an entirety of said first perimeter of said opening defined by said frame member, wherein said edge of said membrane defines a second perimeter, and wherein said carrier member is a one-piece deformable carrier member attached to said membrane around an entirety of said second perimeter of said membrane.

6. The support assembly of claim 4 wherein said carrier member is press-fit into said channel.

7. A support assembly for supporting a body of a user in a seating structure, the support assembly comprising:

a frame member;

an expandable carrier member expandable between at least a first and second configuration, wherein said carrier member is attached to said frame member when expanded to said second configuration, wherein said carrier member comprises a plurality of tab members each having a hook portion engaging said frame member; and

a membrane of elastic material comprising an edge, wherein at least a portion of said edge is attached to said carrier member, wherein said membrane is stretched a desired amount as said carrier member is expanded between said at least said first and second configurations.

8. The support assembly of claim 7 wherein said frame member has a plurality of openings formed in a bottom of a channel formed in said frame member, wherein said carrier member is inserted into said channel and wherein said tab members are inserted through said openings in said bottom of said channel with said hook portions engaging an underside of said frame member.

9. A support assembly for supporting a body of a user in a seating structure, the support assembly comprising:

a frame member;

an expandable carrier member expandable between at least a first and second configuration, wherein said carrier member is attached to said frame member when expanded to said second configuration; and

a membrane of elastic material comprising an edge, wherein at least a portion of said edge is attached to said carrier member, wherein said membrane is stretched a desired amount as said carrier member is expanded between said at least said first and second configurations, and wherein said membrane comprises a fabric comprising monofilaments and strands of multifilament yarn.

10. A seating structure comprising:

a frame member defining an opening and comprising a channel formed around at least a portion of said opening;

a membrane comprising a stretchable, elastic material and having an edge portion; and

a carrier member molded with at least a portion of said edge portion of said membrane, wherein said carrier member is inserted into said channel with said membrane covering said opening.

11. The seating structure of claim 10 wherein said membrane is see-through.

12. The seating structure of claim 10 wherein said channel is formed around an entire perimeter of said opening, and wherein said carrier member extends around and is molded with an entirety of said edge portion of said membrane.

13. The seating structure of claim 10 wherein said membrane comprises a woven material.

14. The seating structure of claim 10 wherein said frame member and said membrane define a backrest.

15. The seating structure of claim 10 wherein said frame member and said membrane define a seat.

16. The seating structure of claim 10 wherein said carrier member is expandable between at least a first and second configuration, wherein said carrier member is inserted into said channel when expanded to said second configuration, and wherein said membrane is stretched a desired amount as said carrier member is expanded between said at least said first and second configurations.

17. The seating structure of claim 10 wherein said membrane is stretched a desired amount after said carrier member is inserted into said channel.

18. The seating structure of claim 10 wherein said carrier member comprises at least one hook portion engaging said frame member.

19. The seating structure of claim 18 wherein said carrier member has a plurality of hook portions engaging said frame member.

20. The seating structure of claim 18 wherein said frame member has an opening formed therein, wherein said at least one hook portion extends though said opening and engages said frame member.

21. The seating structure of claim 20 wherein said opening is formed in a bottom of said channel.

22. A seating structure comprising:

a frame member defining an opening and comprising a channel formed around at least a portion of said opening;

a membrane comprising a stretchable material and having an edge portion, wherein said membrane comprises a fabric comprising monofilaments and strands of multifilament yarn; and

a carrier member molded with at least a portion of said edge portion of said membrane, wherein said carrier member is inserted into said channel with said membrane covering said opening.

23. A seating structure comprising:

a frame member comprising a channel;

a carrier member press fitted in said channel, said carrier member and said channel having corresponding contours wherein said channel is shaped to receive said carrier member by said press fit;

a membrane comprising a stretchable, elastic material and having an edge portion molded with said carrier member.

24. The seating structure of claim 23 wherein said membrane comprises a woven material.

25. The seating structure of claim 23 wherein said membrane comprises a fabric comprising monofilaments and strands of multifilament yarn.

26. The seating structure of claim 23 wherein said membrane is see-through.

27. The seating structure of claim 23 wherein said carrier member comprises at least one hook portion engaging said frame member.

28. The seating structure of claim 23 wherein said frame member has an opening with said channel formed around at least a portion of said opening.

29. The seating structure of claim 28 wherein said channel is formed around an entire perimeter of said opening, and wherein said carrier member extends around and is molded with an entirety of said edge portion of said membrane.

30. A seating structure comprising:

a frame member defining an opening and comprising a body facing surface and a channel formed in said body facing surface around at least a portion of said opening;

a membrane comprising a stretchable material and having an edge portion, wherein said membrane comprises a fabric comprising elastomeric monofilaments and strands of multifilament yarn; and

a securing member formed from a plastic material and dimensioned to be received within said channel, wherein said securing member is disposed in said channel and secures at least a portion of said edge portion of said membrane to said frame member with said membrane covering said opening and with at least a portion of said body facing surface remaining uncovered by said membrane.

31. The seating structure of claim 30 wherein said plastic material comprises a thermoplastic polyester material.

32. The seating structure of claim 30 wherein said edge portion of said membrane is molded with said securing member.

33. The seating structure of claim 30 wherein said securing member is a one-piece molded member that extends around an entire periphery of the membrane.

34. A seating structure comprising:

a frame member defining an opening and comprising a body facing surface and a channel formed in said body facing surface around at least a portion of said opening;

a membrane comprising a stretchable material and having an edge portion; and

a securing member formed from a plastic material and dimensioned to be received within said channel, wherein said securing member is disposed in said channel and secures at least a portion of said edge portion of said membrane to said frame member with said membrane covering said opening and with at least a portion of said body facing surface remaining uncovered by said membrane, wherein said plastic material is selected from the group consisting of polybutylene terephthalate, polystyrene and glass-filled polypropylene.