Seating apparatus with reclining movement

• US 8,777,312 B2
• Filed: 02/23/2012
• Issued: 07/15/2014
• Est. Priority Date: 06/20/2005
• Status: Active Grant

• Current Assignee: Humanscale Corporation
• Original Assignee: Humanscale Corporation
• Inventors: Diffrient, Niels
• Primary Examiner(s): CRANMER, LAURIE K
• Application Number:
  US13/403,808
• Publication Number:
  US 20120146377A1
• Time in Patent Office: 873 Days
• Field of Search: 297/300.1, 297/300.2, 297/302.1, 297/318, 297/320, 297/322, 297/317, 297/325, 297/329, 297/298, 297/300.6, 297/316, 297/321
• US Class Current: 297/318
• CPC Class Codes: A47C 1/03255 with a central column, e.g. rocking office chairs
• CPC Class Codes: A47C 1/03272 with coil springs
• CPC Class Codes: A47C 1/03294 slidingly movable in the base frame, e.g. by rollers
• CPC Class Codes: A47C 1/033 the coupling member being a flexible strip
• CPC Class Codes: A47C 7/48 of freely-rotatable type
• CPC Class Codes: Y10T 29/49863 with prestressing of part

Abstract

The invention provides a seating apparatus having a reclining movement with a corresponding seat lift movement. In one embodiment, the invention is directed to a seating apparatus comprising a base, a curved support bar pivotally connected to the base, a plurality of ramps attached to one of the curved support bar and the base, and a plurality of rollers attached to the other of the curved support bar and the base for interacting with the plurality of ramps. As a user reclines, the plurality of rollers operatively engage the plurality of ramps to lift the seat of the apparatus. The combination of the reclining movement with the corresponding seat lift movement is particularly beneficial for providing an increased level of user comfort throughout a range of seating positions.

Claims

1. A seating apparatus comprising:

a) a base;

b) a curved support bar having an upper backrest support portion and a lower seat support portion interconnected by a curved portion, wherein the upper backrest support portion is pivotally attached to the base to define a fulcrum about which the curved support bar pivots;

c) at least two ramps, each attached to at least one of the base and the seat support portion of the curved support bar; and

d) at least two rollers, each attached to the other of the base and the seat support portion of the curved support bar, for interacting with the at least two ramps.

2. The seating apparatus according to claim 1, wherein the at least two ramps are attached to the seat support portion of the curved support bar and the at least two rollers are attached to the base.

3. The seating apparatus according to claim 1, wherein the at least two ramps are attached to the base and the at least two rollers are attached to the seat support portion of the curved support bar.

4. The seating apparatus according to claim 1, wherein at least one ramp is attached to the base and at least one ramp is attached to the seat support portion of the curved support bar, and wherein at least one roller is attached to the base and at least one roller is attached to the seat support portion of the curved support bar for interacting with the ramps.

5. The seating apparatus according to claim 1, wherein:

the at least two ramps include a first front ramp and a first rear ramp;

the at least two rollers include a first front roller and a first rear roller; and

the first front roller operatively engages the first front ramp and the first rear roller operatively engages the first rear ramp to uniformly lift the lower seat support portion as a user reclines.

6. The seating apparatus according to claim 5, wherein:

the at least two ramps further include;

a second front ramp spaced apart laterally from the first front ramp; and

a second rear ramp spaced apart laterally from the first rear ramp;

the at least two rollers further include;

a second front roller spaced apart laterally from the first front roller; and

a second rear roller spaced apart laterally from the first rear roller; and

the second front roller operatively engages the second front ramp and the second rear roller operatively engages the second rear ramp to uniformly lift the lower seat support portion as a user reclines.

7. The seating apparatus according to claim 6, wherein the rollers have a non-uniform shape, and the at least two ramps are substantially linear in shape.

8. The seating apparatus according to claim 6, further comprising:

a seat attached to the seat support portion of the curved support bar; and

a back rest tiltably attached to the backrest support portion of the curved support bar, and

wherein the curved portion of the curved support bar comprises a spring.

9. The seating apparatus according to claim 8, wherein the seat is supported entirely by the interaction between the at least two ramps and the at least two rollers.

10. The seating apparatus according to claim 8, wherein the seat is slidably attached to the seat support portion of the curved support bar.

11. The seating apparatus according to claim 8, further comprising at least two friction-inducing components for interacting with the at least two rollers.

12. The seating apparatus according to claim 11, wherein the at least two friction-inducing components include at least two friction cups in frictional engagement with the at least two rollers.

13. The seating apparatus according to claim 12, further comprising a biasing mechanism for biasing the at least two friction cups into frictional engagement with the at least two rollers.

14. The seating apparatus according to claim 5, wherein the base includes one or more upwardly curved extensions and wherein the backrest support portion of the curved support bar is pivotally connected to the one or more upwardly curved extensions.

15. The seating apparatus according to claim 14, wherein the rollers are spherical in shape, and the at least two ramps comprise curved ramps.

16. A seating apparatus comprising:

a) a base;

b) a curved support bar having an upper backrest support portion and a lower seat support portion interconnected by a resilient curved portion, wherein the upper backrest support portion is pivotally attached to the base;

c) a plurality of ramps attached to one of the curved support bar and the base, the plurality of ramps comprising a first front ramp and a first rear ramp; and

d) a plurality of rollers attached to the other of the curved support bar and the base, the plurality of rollers comprising a first front roller and a first rear roller, wherein the first front roller operatively engages the first front ramp and the first rear roller operatively engages the first rear ramp to uniformly lift the lower seat support portion as a user reclines.

17. The seating apparatus of claim 16, wherein the plurality of ramps further comprises a second front ramp spaced apart laterally from the first front ramp and a second rear ramp spaced apart laterally from the first rear ramp.

18. The seating apparatus of claim 17, wherein the plurality of rollers further comprises:

a second front roller spaced apart laterally from the first front roller, the second front roller operatively engaged with the second front ramp; and

a second rear roller spaced apart laterally from the first rear roller, the second rear roller operatively engaged with the second rear ramp.

19. The seating apparatus of claim 18, wherein the upper backrest support portion is pivotally attached to the base to define a fulcrum about which the curved support bar pivots.

20. The seating apparatus of claim 19, wherein the plurality of rollers ascend the plurality of ramps to lift the lower seat portion as the curved support bar pivots about the fulcrum when a user reclines.

21. A seating apparatus comprising:

a) a base;

b) a curved support bar having an upper backrest support portion and a lower seat support portion interconnected by a resilient curved portion, wherein the upper backrest support portion is pivotally attached to the base;

c) one or more ramps attached to one of the curved support bar and the base;

d) one or more rollers attached to the other of the curved support bar and the base, wherein the one or more rollers operatively engage the one or more ramps to lift the lower seat support portion as a user reclines; and

e) one or more friction cups frictionally engaging the one or more rollers.

22. The seating apparatus of claim 21, further comprising a biasing mechanism for biasing the one or more friction cups into frictional engagement with the one or more rollers.

23. A seating apparatus comprising:

a) a base;

b) a curved support bar having an upper backrest support portion and a lower seat support portion, wherein the upper backrest support portion is pivotally attached to the base;

c) a plurality of ramps attached to one of the curved support bar and the base, the plurality of ramps comprising;

i. a front ramp attached to one of the curved support bar and the base at a first position;

ii. a second ramp attached to one of the curved support bar and the base at a second position, the second position being rearward of the first position;

d) a plurality of rollers attached to the other of the curved support bar and the base, wherein the plurality of rollers operatively engage the plurality of ramps to provide a means for lifting the lower seat support portion as a user reclines; and

e) one or more friction cups frictionally engaging the one or more rollers.

24. The seating apparatus of claim 23, wherein the seat in an unreclined state defines a first plane, and wherein the seat in a reclined state defines a second plane parallel to the first plane.

25. The seating apparatus of claim 24, wherein the curved support bar further comprises a resilient curved portion interconnecting the upper backrest support portion and the lower seat support portion.