Patent US4233845A successfully refreshed from Google Patents.
US4233845A
Expired / Lapsed
US
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Method of assessing performance potential of a quadruped
Assignee: Massachusetts Institute of Technology
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Filing: 1978-07-28
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Granted: 1980-11-18
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Expires: 1998-07-28
Abstract
Abstract A method of assessing performance potential of a quadruped by determining the timing of successive making and breaking of ground contact by the legs during the stride and the swing time of a leg of the quadruped while in a high-speed gait. Overlap time of the legs, that is, the time that more than one leg is on the ground at one time, as a function of the forward speed of the quadruped and the time required to complete the stride are derived. The total airborne time is determined and related to the stance, swing, and overlap of the stride time. Performance is assessed in terms of swing time, stance time, overlap time, airborne time and combinations thereof. A method is disclosed of relating measurements of the gait taken at an arbitrary speed to a standard reference speed for purposes of comparing different individuals.
Inventors
- 👤 George W. Pratt, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:53
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/45; A61B5/4504; A01; A01K; A01K15/00; A01K15/02; A01K15/027; A01K15/0275; A01K29/00; A01K29/005
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
72 words
A method of assessing the performance potential of a quadruped, that comprises: causing the quadruped to move at a high speed gait; determining the timing of successive making and breaking of ground contact by the legs of the quadruped during its stride in said gait; measuring the overlap time during said stride; measuring the speed of said gait; and producing and displaying an output dependent upon the overlap time at said speed.
Claim 2
Independent Claim
72 words
A method of assessing the performance potential of a quadruped, that comprises: causing the quadruped to move at a high speed gait; determining the timing of successive making and breaking of ground contact by the legs of the quadruped during its stride in said gait; measuring the overlap time during said stride; measuring the speed of said gait; and producing and displaying an output dependent upon the overlap time at said speed.
Claim 3
Dependent Claim
27 words
A method in accordance with claim 1, wherein the overlap time measured at said high speed is then converted to an overlap time at a reference speed.
Claim 4
Dependent Claim
26 words
A method in accordance with claim 2, wherein the steps recited are performed for each of a plurality of quadrupeds, respectively, and the outputs are compared.
Claim 5
Dependent Claim
21 words
A method in accordance with claim 1, wherein the quadruped is a horse and is caused to move at a gallop.
Claim 6
Independent Claim
80 words
A method of assessing the performance potential of a quadruped, that comprises: causing the quadruped to move at a high speed gait; determining the timing of successive making and breaking of ground contact by the legs of the quarduped during its stride in said gait; measuring the airborne time during said stride; measuring the stride time; measuring the speed of said gait; and producing and displaying an output dependent upon the airborne time and the stride time at said speed.
Claim 7
Independent Claim
80 words
A method of assessing the performance potential of a quadruped, that comprises: causing the quadruped to move at a high speed gait; determining the timing of successive making and breaking of ground contact by the legs of the quarduped during its stride in said gait; measuring the airborne time during said stride; measuring the stride time; measuring the speed of said gait; and producing and displaying an output dependent upon the airborne time and the stride time at said speed.
Claim 8
Dependent Claim
33 words
A method in accordance with claim 5, wherein the airborne time and the stride time measured at said high speed are then converted to airborne and stride times, respectively, at a reference speed.
Claim 9
Dependent Claim
26 words
A method in accordance with claim 6, wherein the steps recited are performed for each of a plurality of quadrupeds, respectively, and the outputs are compared.
Claim 10
Dependent Claim
21 words
A method in accordance with claim 5, wherein the quadruped is a horse and is caused to move at a gallop.
Claim 11
Dependent Claim
81 words
Apparatus for assessing the performance potential of a quadruped moving at a high speed gait, that comprises: means responsive to the successive making and breaking of ground contact by the legs of the quadruped during its stride in said gait for producing corresponding signals; means responsive to said signals for measuring the overlap time during said stride; means for measuring the speed of said gait; and means for producing and displaying an output dependent upon the overlap time at said speed.
Claim 12
Dependent Claim
81 words
Apparatus for assessing the performance potential of a quadruped moving at a high speed gait, that comprises: means responsive to the successive making and breaking of ground contact by the legs of the quadruped during its stride in said gait for producing corresponding signals; means responsive to said signals for measuring the overlap time during said stride; means for measuring the speed of said gait; and means for producing and displaying an output dependent upon the overlap time at said speed.
Claim 13
Dependent Claim
14 words
Apparatus in accordance with claim 9, wherein the first-mentioned means comprises acoustic sensor means.
Claim 14
Dependent Claim
95 words
Apparatus for assessing the performance potential of a quadruped moving at a high speed gait, that comprises: means responsive to the successive making and breaking of ground contact by the legs of the quadruped during its stride in said gait for producing corresponding signals; means responsive to said signals for measuring the airborne time during said stride; means responsive to said signals for measuring the stride time; means for measuring the speed of said gait; and means for producing and displaying an output dependent upon the airborne time and the stride time at said speed.
Claim 15
Dependent Claim
95 words
Apparatus for assessing the performance potential of a quadruped moving at a high speed gait, that comprises: means responsive to the successive making and breaking of ground contact by the legs of the quadruped during its stride in said gait for producing corresponding signals; means responsive to said signals for measuring the airborne time during said stride; means responsive to said signals for measuring the stride time; means for measuring the speed of said gait; and means for producing and displaying an output dependent upon the airborne time and the stride time at said speed.
Claim 16
Dependent Claim
14 words
Apparatus in accordance with claim 11, wherein the first-mentioned means comprises acoustic sensor means.
References Cited (Backward Citations)
US3999611A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-18 | 1984-05-19 | 1984-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-18 | 1988-05-19 | 1988-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-18 | 1992-05-19 | 1992-11-18 | $7700.00 | Window Closed / Lapsed |