US5002047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Orthotic pads and methods
Assignee: 3M Co
•
Filing: 1987-09-04
•
Granted: 1991-03-26
•
Expires: 2007-09-04
Abstract
Abstract The present invention relates to an orthotic blank that includes an open-celled foam sheet impregnated with a water curable, isocyanate functional, polyurethane prepolymer resin. The orthotic blank can be used according to the method of this invention to prepare an orthotic pad bearing the impression of a body part to be supported and/or cushioned. The resultant orthotic pad exhibits both proper weight-bearing strength and cushioning properties for effective and comfortable use.
Inventors
- 👤 Timothy C. Sandvig
- 👤 Dennis C. Bartizal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:46
CPC Classifications
A; A43; A43D; A43D999/00; A43B; A43B7/00; A43B7/14; A43B7/28; A61; A61F; A61F13/00; A61F13/00987; A61F13/04; A61F5/00; A61F5/01; A61L; A61L15/00; A61L15/07; A61L15/12; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08J; C08J9/00; C08J9/36; C08J9/40; C08J9/42; C08J2205/00; C08J2205/04; C08J2205/05; C08J2475/00
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
121 words
A method of supporting and/or cushioning a mammalian body part by the use of an orthotic pad, which method comprises the step of using as said orthotic pad an open-celled foam conformed to the shape and position of said body part by the use of a cured polyurethane resin impregnated therein, wherein said pad is prepared from an orthotic blank that when cured in the uncompressed state or the 50% compressed state would exhibit, in both status, an inverse modulus of greater than about 40% deformation in response to a load of 1.05 Kg/cm 2 over a period of 0.5 second, and a resilience of greater than about 30% recovery within 0.5 seconds after being deformed to one-half its cured thickness.
Claim 2
Independent Claim
121 words
A method of supporting and/or cushioning a mammalian body part by the use of an orthotic pad, which method comprises the step of using as said orthotic pad an open-celled foam conformed to the shape and position of said body part by the use of a cured polyurethane resin impregnated therein, wherein said pad is prepared from an orthotic blank that when cured in the uncompressed state or the 50% compressed state would exhibit, in both status, an inverse modulus of greater than about 40% deformation in response to a load of 1.05 Kg/cm 2 over a period of 0.5 second, and a resilience of greater than about 30% recovery within 0.5 seconds after being deformed to one-half its cured thickness.
Claim 3
Dependent Claim
141 words
An orthotic blank comprising an open-celled foam having dimensions suitable for use in apposition to a body part and impregnated with a resin system, said resin system comprising a. a water curable prepolymer resin comprising an isocyanate component and a polyol component, said polyol component having an average hydroxyl equivalent weight greater than about 400 grams of polyol per hydroxyl group, and b. a catalyst capable of setting and curing said prepolymer resin upon exposure to water, wherein said orthotic blank, when cured in the compressed state, or the 50% compressed state would exhibit, in both states, an inverse modulus of greater than about 40% deformation in response to a load of 1.05 kg/cm 2 over a period of 0.5 seconds, and a resilience of greater than about 30% recovery within 0.5 seconds after being deformed to one-half its cured thickness.
Claim 4
Dependent Claim
141 words
An orthotic blank comprising an open-celled foam having dimensions suitable for use in apposition to a body part and impregnated with a resin system, said resin system comprising a. a water curable prepolymer resin comprising an isocyanate component and a polyol component, said polyol component having an average hydroxyl equivalent weight greater than about 400 grams of polyol per hydroxyl group, and b. a catalyst capable of setting and curing said prepolymer resin upon exposure to water, wherein said orthotic blank, when cured in the compressed state, or the 50% compressed state would exhibit, in both states, an inverse modulus of greater than about 40% deformation in response to a load of 1.05 kg/cm 2 over a period of 0.5 seconds, and a resilience of greater than about 30% recovery within 0.5 seconds after being deformed to one-half its cured thickness.
Claim 5
Dependent Claim
21 words
An orthotic blank according to claim 2 wherein said resin system is impregnated into said foam without the use of solvents.
Claim 6
Dependent Claim
25 words
An orthotic blank according to claim 2 wherein said blank sets within about 10 minutes after the activation of said catalyst by exposure to water.
Claim 7
Dependent Claim
24 words
An orthotic blank according to claim 2, wherein said blank, after activation and while setting, exhibits an exotherm of about 43° C. or less.
Claim 8
Dependent Claim
15 words
An orthotic blank according to claim 2 wherein said polyol component is a polypropylene triol.
Claim 9
Dependent Claim
14 words
An orthotic blank according to claim 2 wherein said resin system further comprises plasticizer.
Claim 10
Dependent Claim
34 words
An orthotic blank according to claim 2 wherein said catalyst is 2,2'-dimorpholinodiethyl ether, present in an amount of from about 0.5% to about 7% by weight based on the weight of the prepolymer resin.
Claim 11
Dependent Claim
33 words
An orthotic blank according to claim 2 wherein said catalyst is 4-[2-[1-methyl-2-(4-morpholinyl)ethoxy]ethyl]morpholine, present in an amount of from about 0.5% to about 7% by weight based on the weight of the prepolymer resin.
Claim 12
Dependent Claim
20 words
An orthotic blank according to claim 2 wherein said foam has dimensions suitable for the preparation of an orthotic footpad.
Claim 13
Dependent Claim
18 words
An orthotic blank according to claim 2 wherein said blank is used in conjunction with an orthopedic brace.
Claim 14
Dependent Claim
141 words
An orthotic pad bearing the impression of a body part and prepared from an orthotic blank, comprising an open-celled foam impregnated with a resin system, said resin system comprising a. a water curable prepolymer resin comprising an isocyanate component and a polyol component, said polyol component having an average hydroxyl equivalent weight greater than about 400 grams of polyol per hydroxyl group, and b. a catalyst capable of setting and curing said prepolymer resin upon exposure to water wherein said blank, when cured in the uncompressed state or the 50% compressed state would exhibit, in both states, an inverse modulus of greater than about 40% deformation in response to a load of 1.05 kg/cm 2 over a period of 0.5 seconds, and a resilience of greater than about 30% recovery within 0.5 seconds after being deformed to one-half its cured thickness.
Claim 15
Dependent Claim
141 words
An orthotic pad bearing the impression of a body part and prepared from an orthotic blank, comprising an open-celled foam impregnated with a resin system, said resin system comprising a. a water curable prepolymer resin comprising an isocyanate component and a polyol component, said polyol component having an average hydroxyl equivalent weight greater than about 400 grams of polyol per hydroxyl group, and b. a catalyst capable of setting and curing said prepolymer resin upon exposure to water wherein said blank, when cured in the uncompressed state or the 50% compressed state would exhibit, in both states, an inverse modulus of greater than about 40% deformation in response to a load of 1.05 kg/cm 2 over a period of 0.5 seconds, and a resilience of greater than about 30% recovery within 0.5 seconds after being deformed to one-half its cured thickness.
Claim 16
Dependent Claim
26 words
An orthotic pad according to claim 12 wherein said blank sets within about 10 minutes after the activation of said prepolymer resin by exposure to water.
Claim 17
Dependent Claim
34 words
An orthotic pad according to claim 13 wherein said catalyst is 2,2'-dimorpholinodiethyl ether, present in an amount of from about 0.5% to about 7% by weight based on the weight of the prepolymer resin.
Claim 18
Dependent Claim
33 words
An orthotic pad according to claim 13 wherein said catalyst is 4-[2-[1-methyl-2-(4-morpholinyl)ethoxy]ethyl]morpholine, present in an amount of from about 0.5% to about 7% by weight based on the weight of the prepolymer resin.
Claim 19
Dependent Claim
15 words
An orthotic pad according to claim 12 wherein said foam is a polyether-based polyurethane foam.
Claim 20
Dependent Claim
15 words
An orthotic pad according to claim 12 wherein said foam is a polyester-based polyurethane foam.
Claim 21
Dependent Claim
14 words
An orthotic pad according to claim 12 wherein said pad is an orthotic footpad.
Claim 22
Dependent Claim
15 words
An orthotic footpad according to claim 18 wherein said footpad exhibits variable modulus and resilience.
Claim 23
Dependent Claim
18 words
An orthotic pad according to claim 12 wherein said pad is used in conjunction with an orthopedic brace.
Claim 24
Dependent Claim
147 words
A sandal comprising a sole which comprises an orthotic footpad bearing the impression of a foot and prepared from an orthotic blank comprising an open-celled foam impregnated with a resin system, said resin system comprising a. a water curable prepolymer resin comprising an isocyanate component and a polyol component, said polyol component having an average hydroxyl equivalent weight greater than about 400 grams of polyol per hydroxyl group, and b. a catalyst capable of setting and curing said prepolymer resin upon exposure to water wherein said blank, when cured in the uncompressed state or the 50% compressed state would exhibit, in both states, an inverse modulus of greater than about 40% deformation in response to a load of 1.05 kg/cm 2 over a period of 0.5 second, and a resilience of greater than about 30% recovery within 0.5 seconds after being deformed to one-half its cured thickness.
Claim 25
Dependent Claim
147 words
A sandal comprising a sole which comprises an orthotic footpad bearing the impression of a foot and prepared from an orthotic blank comprising an open-celled foam impregnated with a resin system, said resin system comprising a. a water curable prepolymer resin comprising an isocyanate component and a polyol component, said polyol component having an average hydroxyl equivalent weight greater than about 400 grams of polyol per hydroxyl group, and b. a catalyst capable of setting and curing said prepolymer resin upon exposure to water wherein said blank, when cured in the uncompressed state or the 50% compressed state would exhibit, in both states, an inverse modulus of greater than about 40% deformation in response to a load of 1.05 kg/cm 2 over a period of 0.5 second, and a resilience of greater than about 30% recovery within 0.5 seconds after being deformed to one-half its cured thickness.
Claim 26
Dependent Claim
83 words
An orthotic pad prepared from an orthotic blank and substantially conformed to the shape and position of a body part, wherein said blank, when cured in the uncompressed state of the 50% compressed state would exhibit, in both states, an inverse modulus of greater than about 40% deformation in response to a load of 1.05 kg/cm 2 over a period of 0.5 seconds, and a resilience of greater than about 30% recovery within 0.5 seconds after being deformed to one-half its cured thickness.
Claim 27
Dependent Claim
83 words
An orthotic pad prepared from an orthotic blank and substantially conformed to the shape and position of a body part, wherein said blank, when cured in the uncompressed state of the 50% compressed state would exhibit, in both states, an inverse modulus of greater than about 40% deformation in response to a load of 1.05 kg/cm 2 over a period of 0.5 seconds, and a resilience of greater than about 30% recovery within 0.5 seconds after being deformed to one-half its cured thickness.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-03-25 | 1994-09-24 | 1995-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-25 | 1998-09-24 | 1999-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-25 | 2002-09-24 | 2003-03-26 | $7700.00 | Window Closed / Lapsed |