Patent US4792173A successfully refreshed from Google Patents.
US4792173A
Expired / Lapsed
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Fluid actuated limb
Assignee: Duke University
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Filing: 1987-10-30
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Granted: 1988-12-20
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Expires: 2007-10-30
Abstract
Abstract A fluid actuated limb comprising an elongate flexible core member having a first plurality of bellows extending parallel to the core member and being radially spaced from the core member around substantially the entire circumference thereof. A second plurality of bellows are radially spaced from the core member and helically wrapped around the length of the core member in a first helical direction, and a third plurality of bellows are radially spaced from the core member and helically wrapped around the length thereof in a second helical direction opposite to the first helical direction. Fluid air pressure selectively applied to the limb results in limb movements including extension and contraction, bending with resistance to torsion, right hand and left hand rotation, and combinations of the aforementioned movements.
Inventors
- 👤 James F. Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:33
CPC Classifications
B; B25; B25J; B25J9/00; B25J9/10; B25J9/1075; B25J18/00; B25J18/06; B25J9/14; B25J9/142; F; F15; F15B; F15B15/00; F15B15/08; F15B15/10; F15B15/103
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
208 words
A fluid actuated limb comprising: an elongate flexible core member adapted to be secured at one end to a support; a first plurality of flexible elongate tubes extending substantially parallel to said core member and being radially spaced therefrom around substantially the entire circumference of said core member, said first plurality of tubes being adapted for longitudinal extension and contraction in response to increases and decreases, respectively, in fluid pressure applied thereto; a second plurality of flexible elongate tubes being radially spaced from said core member and helically wrapped around substantially the entire length thereof in a first helical direction, said second plurality of tubes being adapted for longitudinal extension and contraction in response to increases and decreases, respectively, in fluid pressure applied thereto; and a third plurality of flexible elongate tubes being radially spaced from said core member and helically wrapped around substantially the entire length thereof in a second helical direction opposite to said first helical direction, said third plurality of tubes being adapted for longitudinal extension and contraction in response to increases and decreases, respectively, in fluid pressure applied thereto; whereby said limb may be selectively actuated to effect movement including extension and contraction, bending, right hand and left hand twisting, and desired combinations thereof.
Claim 2
Dependent Claim
208 words
A fluid actuated limb comprising: an elongate flexible core member adapted to be secured at one end to a support; a first plurality of flexible elongate tubes extending substantially parallel to said core member and being radially spaced therefrom around substantially the entire circumference of said core member, said first plurality of tubes being adapted for longitudinal extension and contraction in response to increases and decreases, respectively, in fluid pressure applied thereto; a second plurality of flexible elongate tubes being radially spaced from said core member and helically wrapped around substantially the entire length thereof in a first helical direction, said second plurality of tubes being adapted for longitudinal extension and contraction in response to increases and decreases, respectively, in fluid pressure applied thereto; and a third plurality of flexible elongate tubes being radially spaced from said core member and helically wrapped around substantially the entire length thereof in a second helical direction opposite to said first helical direction, said third plurality of tubes being adapted for longitudinal extension and contraction in response to increases and decreases, respectively, in fluid pressure applied thereto; whereby said limb may be selectively actuated to effect movement including extension and contraction, bending, right hand and left hand twisting, and desired combinations thereof.
Claim 3
Dependent Claim
17 words
A fluid actuated limb according to claim 1 wherein said elongate flexible core member is a tube.
Claim 4
Dependent Claim
17 words
A fluid actuated limb according to claim 1 wherein said elongate flexible core member is a bellows.
Claim 5
Dependent Claim
26 words
A fluid actuated limb according to claim 1 said first plurality of tubes, said second plurality of tubes and said third plurality of tubes are bellows.
Claim 6
Dependent Claim
49 words
A fluid actuated limb according to claim 1 wherein said first plurality of tubes are positioned next adjacent to said core member, said second plurality of tubes are wrapped around said first plurality of tubes, and said third plurality of tubes are wrapped around said second plurality of tubes.
Claim 7
Dependent Claim
45 words
A fluid actuated limb according to claim 5 wherein said core member and each of said first plurality of tubes have an equal radius, and said first plurality of tubes are each tapered in the direction remote from the secured end of said core member.
Claim 8
Dependent Claim
54 words
A fluid actuated limb according to claim 1 wherein said second plurality of tubes are wrapped around said core member, said third plurality of tubes are wrapped around said second plurality of tubes, and said first plurality of tubes are positioned radially outwardly and substantially around the circumference of said third plurality of tubes.
Claim 9
Dependent Claim
54 words
A fluid actuated limb according to claim 7 wherein each of said first plurality of tubes has a radius equal to the radius of the bundle formed by said core member wrapped by said second and third plurality of tubes, and said limb is tapered in the direction remote from the secured end thereof.
Claim 10
Dependent Claim
59 words
A fluid actuated limb according to claim 6 or 8 wherein the outside diameter of said limb varies according to the equation: D=cy.sup.1/3 +D.sub.o where D o is limb diameter at the unsecured end of the limb, D is limb diameter, c is a constant, and y is the distance from the unsecured end of said limb to D.
Claim 11
Dependent Claim
19 words
A fluid actuated limb according to claim 1 wherein said limb includes a compressible material in the interstices thereof.
Claim 12
Dependent Claim
17 words
A fluid actuated limb according to claim 10 wherein said compressible material comprises a polymeric cushioning material.
Claim 13
Dependent Claim
18 words
A fluid actuated limb according to claim 1 wherein said first plurality of tubes comprises about 4-8 tubes.
Claim 14
Dependent Claim
18 words
A fluid actuated limb according to claim 1 wherein said second plurality of tubes comprises about 4-20 tubes.
Claim 15
Dependent Claim
18 words
A fluid actuated limb according to claim 1 wherein said third plurality of tubes comprises about 4-20 tubes.
Claim 16
Dependent Claim
189 words
A fluid actuated limb comprising: an elongate flexible core member adapted to be secured at one end to a support; a first plurality of flexible elongate tubes extending substantially parallel to said core member and positioned next adjacent to and substantially around the circumference thereof, said first plurality of tubes being adapted for longitudinal extension and contraction in response to increases and decreases, respectively, in fluid pressure applied thereto; a second plurality of flexible elongate tubes helically wrapped around said first plurality of tubes in a first helical direction, said second plurality of tubes being adapted for longitudinal extension and contraction in response to increases and decreases, respectively, in fluid pressure applied thereto; and a third plurality of flexible elongate tubes helically wrapped around said second plurality of tubes in a second helical direction opposite to said first helical direction, said third plurality of tubes being adapted for longitudinal extension and contraction in response to increases and decreases, respectively, in fluid pressure applied thereto; whereby said limb may be selectively actuated to effect movements including extension and contraction, bending, right hand and left hand twisting, and desired combinations thereof.
Claim 17
Dependent Claim
189 words
A fluid actuated limb comprising: an elongate flexible core member adapted to be secured at one end to a support; a first plurality of flexible elongate tubes extending substantially parallel to said core member and positioned next adjacent to and substantially around the circumference thereof, said first plurality of tubes being adapted for longitudinal extension and contraction in response to increases and decreases, respectively, in fluid pressure applied thereto; a second plurality of flexible elongate tubes helically wrapped around said first plurality of tubes in a first helical direction, said second plurality of tubes being adapted for longitudinal extension and contraction in response to increases and decreases, respectively, in fluid pressure applied thereto; and a third plurality of flexible elongate tubes helically wrapped around said second plurality of tubes in a second helical direction opposite to said first helical direction, said third plurality of tubes being adapted for longitudinal extension and contraction in response to increases and decreases, respectively, in fluid pressure applied thereto; whereby said limb may be selectively actuated to effect movements including extension and contraction, bending, right hand and left hand twisting, and desired combinations thereof.
Claim 18
Dependent Claim
17 words
A fluid actuated limb according to claim 15 wherein said elongate flexible core member is a tube.
Claim 19
Dependent Claim
17 words
A fluid actuated limb according to claim 15 wherein said elongate flexible core member is a bellows.
Claim 20
Dependent Claim
27 words
A fluid actuated limb according to claim 15 wherein said first plurality of tubes, said second plurality of tubes and said third plurality of tubes are bellows.
Claim 21
Dependent Claim
36 words
A fluid actuated limb according to claim 15 wherein said core member and said first plurality of tubes have an equal radius, and said limb is tapered in the direction remote from the secured end thereof.
Claim 22
Dependent Claim
55 words
A fluid actuated limb according to claim 19 wherein the outside diameter of said limb varies according to the equation: D=cy.sup.1/3 +D.sub.o where D o is the diameter at the unsecured end of limb, D is limb diameter, c is constant, and y is the distance from the unsecured end of said limb to D.
Claim 23
Dependent Claim
20 words
A fluid actuated limb according to claim 15 wherein said limb includes a polymeric cushioning material in the interstices thereof.
Claim 24
Dependent Claim
34 words
A fluid actuated limb according to claim 15 wherein said first plurality of tubes comprises 4-8 tubes, said second plurality of tubes comprises 4-20 tubes, and said third plurality of tubes comprises 4-20 tubes.
Claim 25
Dependent Claim
188 words
A fluid actuated limb comprising: an elongate flexible core member adapted to be secured at one end to a support; a first plurality of flexible elongate tubes helically wrapped around said core member in a first helical direction, said first plurality of tubes being adapted for longitudinal extension and contraction in response to increases and decreases, respectively, in fluid pressure applied thereto; a second plurality of flexible elongate tubes helically wrapped around said first plurality of tubes in a second helical directed opposite to said first direction, said second plurality of tubes being adapted for longitudinal extension and contraction response to increases and decreases, respectively, in fluid pressure applied thereto; a third plurality of flexible elongate tubes extending substantially parallel to said core member and positioned radially outwardly from and around the circumference of said second plurality of tubes, said third plurality of tubes being adapted for longitudinal extension and contraction in response to increases and decreases, respectively, in fluid pressure applied thereto; whereby said limb may be selectively actuated to effect movements including extension and contraction, bending, right hand and left hand twisting, and desired combinations thereof.
Claim 26
Dependent Claim
188 words
A fluid actuated limb comprising: an elongate flexible core member adapted to be secured at one end to a support; a first plurality of flexible elongate tubes helically wrapped around said core member in a first helical direction, said first plurality of tubes being adapted for longitudinal extension and contraction in response to increases and decreases, respectively, in fluid pressure applied thereto; a second plurality of flexible elongate tubes helically wrapped around said first plurality of tubes in a second helical directed opposite to said first direction, said second plurality of tubes being adapted for longitudinal extension and contraction response to increases and decreases, respectively, in fluid pressure applied thereto; a third plurality of flexible elongate tubes extending substantially parallel to said core member and positioned radially outwardly from and around the circumference of said second plurality of tubes, said third plurality of tubes being adapted for longitudinal extension and contraction in response to increases and decreases, respectively, in fluid pressure applied thereto; whereby said limb may be selectively actuated to effect movements including extension and contraction, bending, right hand and left hand twisting, and desired combinations thereof.
Claim 27
Dependent Claim
17 words
A fluid actuated limb according to claim 23 wherein said elongate flexible core member is a tube.
Claim 28
Dependent Claim
17 words
A fluid actuated limb according to claim 23 wherein said elongate flexible core member is a bellows.
Claim 29
Dependent Claim
27 words
A fluid actuated limb according to claim 23 wherein said first plurality of tubes, said second plurality of tubes and said third plurality of tubes are bellows.
Claim 30
Dependent Claim
53 words
A fluid actuated limb according to claim 23 wherein each of said third plurality of tubes has a radius equal to the radius of the bundle formed by said core member and said first and second plurality of tubes, and said limb is tapered in the direction remote from the secured end thereof.
Claim 31
Dependent Claim
56 words
A fluid actuated limb according to claim 27 wherein the outside diameter of said limb varies according to the equation: D=cy.sup.1/3 +D.sub.o where D o is the diameter at the unsecured end of the limb, D is limb diameter, c is constant, and y is the distance from the unsecured end of said limb to D.
Claim 32
Dependent Claim
20 words
A fluid actuated limb according to claim 23 wherein said limb includes a polymeric cushioning material in the interstices thereof.
Claim 33
Dependent Claim
34 words
A fluid actuated limb according to claim 23 wherein said first plurality of tubes comprises 4-20 tubes, said second plurality of tubes comprises 4-20 tubes, and said third plurality of tubes comprises 4-8 tubes.
References Cited (Backward Citations)
US2765930A
Cited
US3284964A
Cited
US3343864A
Cited
US3574386A
Cited
US3645173A
Cited
US3601442A
Cited
US3640564A
Cited
GB1371494A
Cited
US3712481A
Cited
US3854383A
Cited
US3913307A
Cited
US3981528A
Cited
US4108050A
Cited
SU837845A1
Cited
SU617254A1
Cited
GB2100826A
Cited
US4621965A
Cited
US4551061A
Cited
SU1229027A1
Cited
SU1187980A1
Cited
US4739692A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-12-20 | 1992-06-20 | 1992-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-20 | 1996-06-20 | 1996-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-20 | 2000-06-20 | 2000-12-20 | $7700.00 | Window Closed / Lapsed |