Preference control mechanism

1. A preference control mechanism for a chair having a back and a seat, the preference control mechanism being actuatable to adjust a force required for tilting at least one of the seat and the back, the preference control comprising:

a housing having a channel, the housing sized and configured for attachment to at least one chair component;

a shuttle having a cavity, the shuttle being moveable within the channel;

a sub shuttle moveable within the channel of the housing, the sub shuttle being moveable independent of the shuttle;

at least one resilient member, the at least one resilient member having a first end and a second end opposite the first end, the first end attached to the shuttle and the second end attached to the sub shuttle; and

the shuttle and sub shuttle moveable within the channel to adjust a position of the shuttle from a first position to at least one second position to adjust the force needed for tilting the at least one of the back and the seat, the shuttle not being moveable to a different position defining a different amount of force needed to tilt the at least one of the seat and the back if the at least one of the seat and back is in a tilted position; and

the sub shuttle being moveable independent of the shuttle within the channel to at least one position corresponding to the at least one second position of the shuttle such that adjustment of the preference control is settable when the at least one of the seat and back is in a tilted position and the shuttle is not moveable, movement of the sub shuttle to one of the at least one position when the at least one of the seat and back is in a tilted position positioning a portion of the at least one resilient member so that the at least one resilient member causes the shuttle to move to one of the at least one second position of the shuttle after the at least one of the seat and back is moved out of that tilted position and into a position in which the shuttle is moveable.

2. The preference control mechanism of claim 1 wherein the sub shuttle is moveable from a first position located substantially within the cavity to a second position located at least partially out of the cavity, a greater portion of the sub shuttle extending out of the cavity when the sub shuttle is in the second position than in the first position, the second position of the sub shuttle being one of the at least one position of the sub shuttle corresponding to the at least one second position of the shuttle.

3. The preference control mechanism of claim 1 wherein the at least one resilient member is comprised of at least one spring.

4. The preference control mechanism of claim 1 further comprising an actuator configured for attachment to at least one chair component, the actuator being moveable from a first position to at least one second position, and an elongated member extending from the actuator to the sub shuttle, the elongated member having a first end and a second end opposite the first end, the elongated member being attached to the actuator such that movement of the actuator from the first position of the actuator to the second position of the actuator causes the elongated member to move from a first position of the elongated member to a second position of the elongated member.

5. The preference control mechanism of claim 4 wherein the actuator is comprised of a body having an opening sized to moveably receive the first end of the elongated member, the first end of the elongated member being attached to the body such that the first end of the elongated member is moveable within the opening.

6. The preference control mechanism of claim 5 wherein the body is configured such that a portion of the body is rotatable such that the actuator is moved from the first position of the actuator to the second position of the actuator by rotation of the portion of the body, rotation of the portion of the body causing the first end of the elongated member to move within the opening.

7. The preference control mechanism of claim 4 wherein the shuttle is comprised of a body that defines the cavity and a member attached to the body, the first end of the at least one resilient member being attached to the shuttle adjacent to the member.

8. The preference control mechanism of claim 7 wherein the at least one resilient member is moveable from a first position to a second position, the at least one resilient member having a first length when in the first position and having a second length when in the second position, the second length being longer than the first length.

9. The preference control mechanism of claim 8 wherein the sub shuttle is moveable to the at least one position corresponding to the at least one second position of the shuttle within the cavity of the shuttle, the sub shuttle being attached to the second end of the elongated member such that movement of the actuator from the first position to the actuator to the second position of the actuator causes the sub shuttle to move to the at least one position corresponding to the at least one second position of the shuttle.

10. The preference control mechanism of claim 9 wherein the at least one resilient member is configured to move to the second position of the at least one resilient member when the sub shuttle is moved to the at least one position corresponding to the at least one second position of the shuttle while the at least one of the seat and back is in the tilted position and the shuttle is retained in the first position of the shuttle.

11. The preference control mechanism of claim 1 wherein the sub shuttle is moveable within the cavity of the shuttle from a first position to the at least one position corresponding to the at least one second position of the shuttle; the at least one resilient member being configured to bias the sub shuttle to the first position of the sub shuttle.

12. The preference control mechanism of claim 1 wherein the shuttle is sized and configured for attachment to a pivot pin or other pivot point of at least one chair component.

13. The preference control mechanism of claim 1 further comprising at least one biasing mechanism positioned at least partially within the channel of the housing, each of the at least one biasing mechanism having a first end adjacent to the housing and a second end adjacent to the sub shuttle.

14. The preference control mechanism of claim 13 wherein the at least one biasing mechanism is a coil spring and the coil spring is configured to bias the sub shuttle to a position that is at least partially within the cavity of the shuttle.

15. A chair comprising a base, a seat, a back and a tilt mechanism, the tilt mechanism attached to at least one of the seat, the base and the back, the back attached to at least one of the seat, the base and the tilt mechanism, and the seat attached to at least one of the base, the tilt mechanism and the back, the chair also comprising a preference control mechanism attached to at least a portion of the tilt mechanism, the preference control mechanism being actuatable to adjust a force required for tilting at least one of the back and the seat, the preference control mechanism comprising:

a housing having a channel,

a shuttle having a cavity, the shuttle moveable within the channel of the housing from a first position to at least one second position;

a sub shuttle moveable within the channel of the housing, the sub shuttle being moveable independent of the shuttle, and

at least one resilient member, the at least one resilient member having a first end and a second end opposite the first end, the first end attached to the shuttle and the second end attached to the sub shuttle; and

the shuttle and sub shuttle moveable within the channel to adjust a position of the shuttle form a first position to the at least one second position to adjust the force needed for tilting the at least one of the back and the seat, the shuttle not being moveable to a different position defining a different amount of force needed to tilt the at least one of the seat and the back if the at least one of the seat and back is in a tilted position; and

the sub shuttle being moveable independent of the shuttle within the channel to at least one position corresponding to the at least one second position of the shuttle such that adjustment of the preference control is settable when the at least one of the seat and back is in a tilted position and the shuttle is not moveable, movement of the sub shuttle to one of the at least one position when the at least one of the seat and back is in a tilted position positioning a portion of the at least one resilient member so that the at least one resilient member causes the shuttle to move to one of the at least one second position of the shuttle after the at least one of the seat and back is moved out of that tilted position and into a position in which the shuttle is moveable.

16. The chair of claim 15 further comprising at least one biasing mechanism positioned within the channel of the housing, each of the at least one biasing mechanism having a first end attached to or engaging the housing and a second end attached to or engaging the sub shuttle.

17. The chair of claim 16 further comprising an actuator attached to the seat or the base, the actuator being moveable from a first position to a second position, and an elongated member having a first end and a second end opposite the first end, the elongated member extending from the actuator to the sub shuttle, the elongated member being attached to the actuator such that movement of the actuator from the first position of the actuator to the second position of the actuator causes the elongated member to move from a first position to a second position.

18. The chair of claim 17 wherein the actuator is comprised of a body having an opening sized to moveably receive an end of the elongated member, the first end of the elongated member being attached to the body such that the first end of the elongated member is moveable within the opening.

19. The preference control mechanism of claim 18 wherein the body is configured such that a portion of the body is rotatable from a first position to at least one second position, rotation of the portion of the body causing the first end of the elongated member to move within the opening.

20. The chair of claim 17 wherein the shuttle is comprised of a body that defines the cavity and a member attached to the body, the first end of the at least one resilient member attached to the shuttle by being attached to the member.

21. The chair of claim 20 wherein the sub shuttle is moveable from a first position to the at least one position corresponding to the at least one second position of the shuttle within the cavity of the shuttle, the sub shuttle being attached to the second end of the elongated member such that movement of the actuator from the first position of the actuator to the second position of the actuator causes the sub shuttle to move to the at least one position corresponding to the at least one second position of the shuttle.

22. The chair of claim 21 wherein the at least one resilient member is configured to stretch or elongate when the sub shuttle is moved to the at least one position corresponding to the at least one second position of the shuttle while a force acts on the shuttle to retain the shuttle in a first position of the shuttle when the at least one of the seat and back is in the tilted position.

23. The chair of claim 15 wherein the housing has at least one groove configured to receive a portion of the base for attaching the housing to the base.

24. The chair of claim 15 also comprising a member attached to the shuttle, at least a portion of the member being a portion of the tilt mechanism.