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US 7,008,017 B1Granted
Dynamic chair
OwnerWilliam E. Wegenerinventor
Life of this patent
Estimating the term…
Abstract
The present invention provides a dynamic chair having a deterministic motion path that allows a variety to different paths to be selected depending of needs of user. By changing the ratio between drive wheels that control the pitch and roll of the seat, motion paths can be selected to help a person assume and/or avoid certain postures while seated. Embodiments of the present invention move the seat of the dynamic chair through a deterministic path to dictate how often and when the seat is in a level position with respect to pitch and roll.
Claims29
A dynamic chair providing automatic motion in a seat, the chair comprising:
- a base;
- a seat having a bottom, the seat bottom having a first seat bottom mounting point and a second seat bottom mounting point;
- a support means disposed between the base and the seat bottom;
- a drive motor;
- a first drive wheel driven in a rotational manner by the drive motor, the first drive wheel having a first mounting point offset from the center of the first drive wheel;
- a first control means providing a first rotational degree of freedom of movement to the seat, the first control means attached between the first offset mounting point and the first seat bottom mounting point;
- a second drive wheel driven in a rotational manner by the first drive wheel;
- a crankshaft having a first crankshaft end and a second crankshaft end, the first crankshaft end connected to the second drive wheel and rotatably driven by the second drive wheel, the second crankshaft end having an eccentric providing a second offset mounting point offset from the center of the second crankshaft end;
- a second control means providing a second rotational degree of freedom of movement to the seat, the second control means attached between the second offset mounting point and the second seat bottom mounting point;
- wherein the first drive wheel and the second drive wheel are configured in a nonequal ratio of diameters within a range of 20.0:1.0 and 1.0:20.0, such that a changing, substantially ellipsoidal pattern of movement is produced in the seat bottom.
7 more elements
A dynamic chair providing automatic motion in a seat, the chair comprising:
- a base;
- a seat having a bottom, the seat bottom having a first seat bottom mounting point and a second seat bottom mounting point;
- a support means disposed between the base and the seat bottom;
- a first drive motor;
- a first drive wheel driven in a rotational manner by the first drive motor, the first drive wheel having a first mounting point offset from the center of the first drive wheel;
- a first control means providing a first rotational degree of freedom of movement to the seat, the first control means attached between the first offset mounting point and the first seat bottom mounting point;
- a second drive motor;
- a second drive wheel driven in a rotational manner by the second drive motor, the second drive wheel having a second mounting point offset from the center of the second drive wheel;
- a second control means providing a second rotational degree of freedom of movement to the seat, the second control means attached between the second offset mounting point and the second seat bottom mounting point;
- wherein the first drive wheel and the second drive wheel are driven in a nonequal ratio of rotational speeds within a range of 20.0:1.0 and 1.0:20.0, such that a changing, substantially ellipsoidal pattern of movement is produced in the seat bottom.
7 more elements
A dynamic chair providing automatic motion in a seat, the chair comprising:
- a base;
- a seat having a bottom, the seat bottom having a first seat bottom mounting point and a second seat bottom mounting point;
- a support means disposed between the base and the seat bottom;
- a drive motor;
- a first drive wheel driven in a rotational manner by the drive motor, the first drive wheel having a first mounting point offset from the center of the first drive wheel;
- a first control means providing a first rotational degree of freedom of movement to the seat, the first control means attached between the first offset mounting point and the first seat bottom mounting point;
- a second drive wheel driven in a rotational manner by the first drive wheel;
- a crankshaft having a first crankshaft end and a second crankshaft end, the first crankshaft end connected to the second drive wheel and rotatably driven by the second drive wheel, the second crankshaft end having an eccentric providing a second offset mounting point offset from the center of the second crankshaft end;
- a second control means providing a second rotational degree of freedom of movement to the seat, the second control means attached between the second offset mounting point and the second seat bottom mounting point;
- wherein the first drive wheel and the second drive wheel are configured in a nonequal ratio of diameters within a range of 20.0:1.0 and 1.0:20.0, such that a changing, substantially ellipsoidal pattern of movement is produced in the seat bottom;
- wherein the support means comprises a universal joint and an attached extension arm, the support means providing a first degree of linear freedom of linear movement for the seat and a second degree of linear freedom of linear motion for the seat, the first degree of freedom of linear motion orthogonal to the second degree of freedom of linear movement, wherein the seat bottom is attached to the extension arm and the base is attached to the universal joint.
8 more elements
A dynamic chair providing automatic motion in a seat, the chair comprising:
- a base;
- a seat having a bottom, the seat bottom having a first seat bottom mounting point and a second seat bottom mounting point;
- a support means disposed between the base and the seat bottom;
- a drive motor;
- a first drive wheel driven in a rotational manner by the drive motor, the first drive wheel having a first mounting point offset from the center of the first drive wheel;
- a first control means providing a first rotational degree of freedom of movement to the seat, the first control means attached between the first offset mounting point and the first seat bottom mounting point;
- a second drive wheel driven in a rotational manner by the first drive wheel;
- a crankshaft having a first crankshaft end and a second crankshaft end, the first crankshaft end connected to the second drive wheel and rotatably driven by the second drive wheel, the second crankshaft end having an eccentric providing a second offset mounting point offset from the center of the second crankshaft end;
- a second control means providing a second rotational degree of freedom of movement to the seat, the second control means attached between the second offset mounting point and the second seat bottom mounting point;
- wherein the first drive wheel and the second drive wheel are configured in a nonequal ratio of diameters within a range of 20.0:1.0 and 1.0:20.0, such that a changing, substantially ellipsoidal pattern of movement is produced in the seat bottom;
- wherein the first control means and the second control means are connected to the first seat mounting point and the second seat mounting point, respectively, such that the seat is moved through the changing, substantially ellipsoidal pattern of movement.
8 more elements
Dependencies are inferred from the claim text.