US4569352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feedback control system for walking
Assignee: Wright State University
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Filing: 1984-11-15
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Granted: 1986-02-11
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Expires: 2004-11-15
Abstract
Abstract A computer algorithm and hardware are disclosed for feedback control of movement in man for standing and walking. The system measures motion of the hips, knees and ankles and generates control signals for ten different muscle groups. Hip and knee supports are provided for restricting hip and knee movement to a common plane.
Inventors
- 👤 Jerrold S. Petrofsky
- 👤 Chandler A. Phillips
- 👤 Harry H. Heaton, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:09
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/36003; A61H; A61H2230/00; A61H2230/62; A61H3/00; A61H3/008
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
164 words
A feedback control system for walking comprising: means for restricting the hips and knees to common plane movement, first stimulation means for stimulating the iliacus and hamstring muscle groups to produce hip movement in said common plane, first sensing means for sensing hip movement and generating a first feedback signal in correspondence therewith, second stimulating means for stimulating the quadriceps muscle groups to produce knee movement in said common plane in coordination with said hip movement, second sensing means for sensing said knee movement and generating a second feedback signal in correspondence therewith, means for supporting the ankles, third stimulation means for stimulating the gastrocnemius and tibialis muscle groups to produce ankle movement which is coordinated with said hip and knee movement, third sensing means for sensing said ankle movement and generating a third feedback signal in correspondence therewith, and programmed microprocessor means for receiving said first, second and third feedback signals and generating control signals for said first, second and third stimulating means.
Claim 2
Dependent Claim
164 words
A feedback control system for walking comprising: means for restricting the hips and knees to common plane movement, first stimulation means for stimulating the iliacus and hamstring muscle groups to produce hip movement in said common plane, first sensing means for sensing hip movement and generating a first feedback signal in correspondence therewith, second stimulating means for stimulating the quadriceps muscle groups to produce knee movement in said common plane in coordination with said hip movement, second sensing means for sensing said knee movement and generating a second feedback signal in correspondence therewith, means for supporting the ankles, third stimulation means for stimulating the gastrocnemius and tibialis muscle groups to produce ankle movement which is coordinated with said hip and knee movement, third sensing means for sensing said ankle movement and generating a third feedback signal in correspondence therewith, and programmed microprocessor means for receiving said first, second and third feedback signals and generating control signals for said first, second and third stimulating means.
Claim 3
Dependent Claim
55 words
A feedback control system according to claim 1 and further comprising fourth sensing means for sensing shoulder movement and generating a fourth feedback signal in correspondence therewith; said microprocessor being connected for reception of said fourth feedback signal and programmed for timing the generation of said control signals in response to said fourth feedback signal.
Claim 4
Dependent Claim
31 words
A feedback control system according to claim 2 and further comprising foot sensors for sensing contact of the heels and toes with the floor and signaling said contact to said microprocessor.
Claim 5
Dependent Claim
101 words
Apparatus for stimulation of human walking comprising: stimulation means for electrically stimulating muscles in both legs of said human to produce coordinated movement of said legs, means for restricting the hips and knees of said human to common plane movement, support means for the ankles of said human leg sensing means for sensing the positions of said legs and generating leg position signals corresponding thereto, sensing means for sensing a voluntary movement of said human and generating sequence initiation signals corresponding thereto, and computing means responsive to said leg position signals and said sequence initiation signals for controlling said stimulation means.
Claim 6
Dependent Claim
101 words
Apparatus for stimulation of human walking comprising: stimulation means for electrically stimulating muscles in both legs of said human to produce coordinated movement of said legs, means for restricting the hips and knees of said human to common plane movement, support means for the ankles of said human leg sensing means for sensing the positions of said legs and generating leg position signals corresponding thereto, sensing means for sensing a voluntary movement of said human and generating sequence initiation signals corresponding thereto, and computing means responsive to said leg position signals and said sequence initiation signals for controlling said stimulation means.
Claim 7
Dependent Claim
23 words
Apparatus according to claim 4 wherein said means for sensing voluntary movement comprises means for sensing movement of the shoulders of said human.
Claim 8
Dependent Claim
148 words
A feedback control system for walking comprising: means for restricting the hips and knees to common plane movement, means for supporting the ankles during said hip and knee movement first stimulation means for stimulating hip movement in said common plane, first sensing means for sensing hip movement and generating a first feedback signal in correspondence therewith, second stimulating means for stimulating knee movement in said common plane in coordination with said hip movement, second sensing means for sensing said knee movement and generating a second feedback signal in correspondence therewith, third stimulation means for stimulating ankle movement which is coordinated with said hip and knee movement, third sensing means for sensing said ankle movement and generating a third feedback signal in correspondence therewith, and programmed microprocessor means for receiving said first, second and third feedback signals and generating control signals for said first, second and third stimulating means.
Claim 9
Dependent Claim
148 words
A feedback control system for walking comprising: means for restricting the hips and knees to common plane movement, means for supporting the ankles during said hip and knee movement first stimulation means for stimulating hip movement in said common plane, first sensing means for sensing hip movement and generating a first feedback signal in correspondence therewith, second stimulating means for stimulating knee movement in said common plane in coordination with said hip movement, second sensing means for sensing said knee movement and generating a second feedback signal in correspondence therewith, third stimulation means for stimulating ankle movement which is coordinated with said hip and knee movement, third sensing means for sensing said ankle movement and generating a third feedback signal in correspondence therewith, and programmed microprocessor means for receiving said first, second and third feedback signals and generating control signals for said first, second and third stimulating means.
Claim 10
Dependent Claim
55 words
A feedback control system according to claim 6 and further comprising fourth sensing means for sensing shoulder movement and generating a fourth feedback signal in correspondence therewith; said microprocessor being connected for reception of said fourth feedback signal and programmed for timing the generation of said control signals in response to said fourth feedback signal.
Claim 11
Dependent Claim
31 words
A feedback control system according to claim 7 and further comprising foot sensors for sensing contact of the heels and toes with the floor and signaling said contact to said microprocessor.
Claim 12
Dependent Claim
100 words
Apparatus for stimulated walking comprising: stimulation means for electrically stimulating the muscles of both legs of a human being to produce coordinated walking movement, sensing means for sensing the positions of said legs and generating feedback signals corresponding thereto, computing means responsive to said feedback signals for controlling said stimulation means, and overhead support means comprising: a harness for attaching to the body of said human being, a counterweight attached to said harness for counterbalancing the weight of said human being, and an overhead support member for supporting said counterweight and a portion of the weight of said human being.
Claim 13
Dependent Claim
100 words
Apparatus for stimulated walking comprising: stimulation means for electrically stimulating the muscles of both legs of a human being to produce coordinated walking movement, sensing means for sensing the positions of said legs and generating feedback signals corresponding thereto, computing means responsive to said feedback signals for controlling said stimulation means, and overhead support means comprising: a harness for attaching to the body of said human being, a counterweight attached to said harness for counterbalancing the weight of said human being, and an overhead support member for supporting said counterweight and a portion of the weight of said human being.
References Cited (Backward Citations)
US3083712A
Cited
US3204637A
Cited
US3344792A
Cited
US3769636A
Cited
US3929335A
Cited
US4030141A
Cited
US4147171A
Cited
US4165750A
Cited
US4252112A
Cited
US4499900A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-10 | 1989-08-12 | 1990-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-10 | 1993-08-12 | 1994-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-10 | 1997-08-12 | 1998-02-11 | $7700.00 | Window Closed / Lapsed |