A control assembly for a chair includes a base structure having a first pivot point and a second pivot point spaced from the first pivot point, a seat support structure having a forward portion pivotably coupled to the base structure for rotation about the first pivot point, a back support structure
A control assembly for a chair includes a base structure having a first pivot point and a second pivot point spaced from the first pivot point, a seat support structure having a forward portion pivotably coupled to the base structure for rotation about the first pivot point, a back support structure having a forward portion pivotably coupled to the base structure for rotation about the second pivot point, wherein the back support structure is adapted to move between upright and reclined positions, and wherein the seat support structure reclines rearwardly as the back support structure moves from the upright to reclined positions, and a control link having a first end pivotably coupled to a rearward portion of the seat support structure for rotation about a third pivot point, and a second end pivotably coupled to a rearward portion of the back support structure for rotation about a fourth pivot point.
대표청구항▼
1. A control assembly for a chair, comprising: a base structure defining a first pivot point and a second pivot point spaced from the first pivot point, wherein the base structure is adapted to attach to a ground-abutting base support structure;a seat support structure having a forward portion pivot
1. A control assembly for a chair, comprising: a base structure defining a first pivot point and a second pivot point spaced from the first pivot point, wherein the base structure is adapted to attach to a ground-abutting base support structure;a seat support structure having a forward portion pivotably coupled to the base structure for rotation about the first pivot point and a rearward portion located rearward of the forward portion, and wherein the seat support structure is adapted to support a seated user;a back support structure having a forward portion pivotably coupled to the base structure for rotation about the second pivot point and a rearward portion located rearwardly of the forward portion, wherein the back support structure is adapted to move between an upright position and a reclined position, and wherein the seat support structure reclines rearwardly as the back support structure moves from the upright position to the reclined position; anda control link having a first end pivotably coupled to the rearward portion of the seat support structure for rotation about a third pivot point, and a second end pivotably coupled to the rearward portion of the back support structure for rotation about a fourth pivot point. 2. The control assembly of claim 1, wherein the third pivot point is located at a greater vertical height than the second pivot point. 3. The control assembly of claim 2, wherein the third pivot point is located at a greater vertical height than the fourth pivot point when the back support structure is in the first position. 4. The control assembly of claim 2, wherein the third pivot point is located at a greater vertical height than the fourth pivot point when the back support structure is in the second position. 5. The control assembly of claim 1, wherein a distance between the first pivot point and the second pivot point is greater than a distance between the third pivot point and the fourth pivot point. 6. The control assembly of claim 1, further comprising: at least one biasing assembly exerting a biasing force that biases the back support structure from the second position towards the first position. 7. The control assembly of claim 6, wherein the biasing force biases the third pivot point towards the second pivot point. 8. The control assembly of claim 1, wherein the first pivot point is at a greater vertical height than the second pivot point. 9. A control assembly for a chair, comprising: a base structure defining a first pivot point and a second pivot point spaced from the first pivot point, wherein the base structure is adapted to attach to a ground-abutting base support structure;a seat support structure having a forward portion pivotably coupled to the base structure for rotation about the first pivot point and a rearward portion located rearward of the forward portion, and wherein the seat support structure is adapted to support a seated user;a back support structure having a forward portion pivotably coupled to the base structure for rotation about the second pivot point and a rearward portion located rearwardly of the forward portion, wherein the back support structure is adapted to move between a first position and a second position; anda control link having a first end pivotably coupled to the rearward portion of the seat support structure for rotation about a third pivot point, and a second end pivotably coupled to the rearward portion of the back support structure for rotation about a fourth pivot point, wherein the fourth pivot point is at a greater vertical height than the second pivot point. 10. The control assembly of claim 9, wherein the third pivot point is located at a greater vertical height than the second pivot point. 11. The control assembly of claim 10, wherein the third pivot point is located at a greater vertical height than the fourth pivot point when the back support structure is in the first position. 12. The control assembly of claim 10, wherein the third pivot point is located at a greater vertical height than the fourth pivot point when the back support structure is in the second position. 13. The control assembly of claim 9, wherein a distance between the first pivot point and the second pivot point is greater than a distance between the third pivot point and the fourth pivot point. 14. The control assembly of claim 9, further comprising: at least one biasing assembly exerting a biasing force that biases the back support structure from the second position towards the first position. 15. The control assembly of claim 14, wherein the biasing force biases the third pivot point towards the second pivot point. 16. The control assembly of claim 9, wherein the first pivot point is at a greater vertical height than the second pivot point. 17. A control assembly for a chair, comprising: a base structure defining a first pivot point and a second pivot point spaced from the first pivot point, wherein the base structure is adapted to attach to a ground-abutting base support structure;a seat support structure having a forward portion pivotably coupled to the base structure for rotation about the first pivot point and a rearward portion located rearward of the forward portion, and wherein the seat support structure is adapted to support a seated user;a back support structure having a forward portion pivotably coupled to the base structure for rotation about the second pivot point and a rearward portion located rearwardly of the forward portion, wherein the back support structure is adapted to move between a first position and a second position; anda control link having a first end pivotably coupled to the rearward portion of the seat support structure for rotation about a third pivot point, and a second end pivotably coupled to the rearward portion of the back support structure for rotation about a fourth pivot point, wherein the third pivot point is rearward of the second pivot point. 18. The control assembly of claim 17, wherein the third pivot point is located at a greater vertical height than the second pivot point. 19. The control assembly of claim 18, wherein the third pivot point is located at a greater vertical height than the fourth pivot point when the back support structure is in the first position. 20. The control assembly of claim 18, wherein the third pivot point is located at a greater vertical height than the fourth pivot point when the back support structure is in the second position. 21. The control assembly of claim 17, wherein a distance between the first pivot point and the second pivot point is greater than a distance between the third pivot point and the fourth pivot point. 22. The control assembly of claim 17, further comprising: at least one biasing assembly exerting a biasing force that biases the back support structure from the second position towards the first position. 23. The control assembly of claim 22, wherein the biasing force biases the third pivot point towards the second pivot point. 24. The control assembly of claim 17, wherein the first pivot point is located at a greater vertical height than the second pivot point. 25. A control assembly for a chair, comprising: a base structure defining a first pivot point and a second pivot point spaced from the first pivot point, wherein the base structure is adapted to attach to a ground-abutting base support structure;a seat support structure having a forward portion pivotably coupled to the base structure for rotation about the first pivot point and a rearward portion located rearward of the forward portion, and wherein the seat support structure is adapted to support a seated user;a back support structure having a forward portion pivotably coupled to the base structure for rotation about the second pivot point and a rearward portion located rearwardly of the forward portion, wherein the back support structure is adapted to move between a first position and a second position; anda control link having a first end pivotably coupled to the rearward portion of the seat support structure for rotation about a third pivot point, and a second end pivotably coupled to the rearward portion of the back support structure for rotation about a fourth pivot point, wherein the fourth pivot point is located rearwardly of the second pivot point. 26. The control assembly of claim 25, wherein the third pivot point is located at a greater vertical height than the second pivot point. 27. The control assembly of claim 26, wherein the third pivot point is located at a greater vertical height than the fourth pivot point when the back support structure is in the first position. 28. The control assembly of claim 26, wherein the third pivot point is located at a greater vertical height than the fourth pivot point when the back support structure is in the second position. 29. The control assembly of claim 25, wherein a distance between the first pivot point and the second pivot point is greater than a distance between the third pivot point and the fourth pivot point. 30. The control assembly of claim 25, further comprising: at least one biasing assembly exerting a biasing force that biases the back support structure from the second position towards the first position. 31. The control assembly of claim 30, wherein the biasing force biases the third pivot point towards the second pivot point. 32. The control assembly of claim 25, wherein the first pivot point is located at a greater vertical height than the second pivot point.
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