EP0454184A2
Expired / Lapsed
EP
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Passive heating pad
Assignee: LASTRAP Inc
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Filing: 1986-04-03
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Granted: —
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Expires: 2006-04-03
Abstract
Abstract A therapeutic device takes the form of a passive heating pad comprising at least one flexible generally planar envelope dimensioned to engage an area of skin adjacent muscle tissue to be treated and flexible to snugly engage the skin area. The envelope is filled with a highly viscous permanently-liquid material having a thermal conductivity of less than 0.1 W/m.<0>C), preferably with a viscosity in the range of about 100,000 to about 1,000,000 SUS units at 38<0>C (100<0>F).
Inventors
- 👤 Anthony J. Last
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 12:21
CPC Classifications
A; A61; A61F; A61F7/00; A61F7/02; A61F13/00; A61F13/01; A61F13/01034; A61F2007/0001; A61F2007/0029; A61F2007/0032; A61F2007/0266; A61F2013/00089; A61F2013/00187; A61F2013/00204; A61F2013/00208; A61F2013/00361; A61F2013/00544; A61F2013/00553; A61F2013/00565
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
58 words
A passive heating pad comprising at least one flexible generally planar envelope dimensioned to engage an area of skin adjacent muscle tissue to be treated and flexible to snugly engage the skin area, characterized in that the at least one envelope is filled with a highly viscous permanently-liquid material having a thermal conductivity of less than 0.1 W/m.⁰C).
Claim 2
Dependent Claim
45 words
The heating pad claimed in Claim 1, characterized in that the pad is provided as one of a sheet of identical heating pads arranged with tear lines between individual pads to permit the provision of single of multiple pad units for a desired end use.
Claim 3
Dependent Claim
31 words
The heating pad claimed in Claim 1 or 2, characterized in that the highly viscous material has a viscosity in the range of 100,000 to 1,000,000 SUS units at 38⁰C (100⁰F.
Claim 4
Dependent Claim
32 words
The heating pad claimed in nay one of Claims 1 to 3, characterized in that the material comprises a continuous liquid phase and finely-divided solid filler material dispersed in said liquid phase.
Claim 5
Dependent Claim
22 words
The heating pad claimed in Claim 4, characterized in that said material comprises liquid polybutene, a petroleum wax and said filler material.
Claim 6
Dependent Claim
22 words
The heating pad claimed in Claim 5, characterized in that said polybutene has a number average molecular weight of 1,000 to 1,500.
Claim 7
Dependent Claim
19 words
The heating pad claimed in Claim 5 or 6, characterized in that said solid filler material is calcium carbonate.
Claim 8
Dependent Claim
24 words
The heating pad claimed in any one of Claims 1 to 6, characterized in that said solid filler material is sawdust or powdered rubber.
Claim 9
Dependent Claim
24 words
The heating pad claimed in any one of Claims 1 to 8, characterized in that the material has a decreasing viscosity with increasing temperature.
Claim 10
Dependent Claim
39 words
The use of a highly viscous permanently-liquid material having a thermal conductivity of less than 0.1 W/(m.⁰C) in the manufacture of a flexible generally planar passive heating pad for the heat treatment of muscle or a group of muscles.
Claim 11
Dependent Claim
15 words
The use claimed in Claim 10, wherein the pad is for the treatment of arthritis.
Claim 12
Dependent Claim
22 words
The use claimed in Claim 10 or 11, wherein said material is as defined in any one of Claims 3 to 9.
References Cited (Backward Citations)
No citation records indexed.
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