US4154226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetically operated closure for an intestinal orifice
Assignee: Coloplast International AS
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Filing: 1977-05-27
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Granted: 1979-05-15
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Expires: 1997-05-27
Abstract
Abstract An implantate comprising an essentially annular permanent magnet which is axially magnetized is located in the vicinity of an orifice from an intestine, surrounding the intestine. A plug element having a core of magnetic material and an outer casing is inserted into the intestinal orifice. The casing is essentially cylindrical and is made of a material which is radially compressible, and inserted in the orifice, the magnetic material within the core thereof -- which is preferably removable -- in cooperation with the magnetic field from the permanent magnet locating the plug element within the orifice to establish an axial equilibrium position and hold the plug element in position closing the orifice.
Inventors
- 👤 Gerhard Hennig
- 👤 Gunter Willital
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:25
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/0004; A61F2/0009; A61F2/0018; Y; Y10; Y10S; Y10S128/00; Y10S128/25
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
108 words
In combination with a magnetically secured closure for the orifice of an intestine, having an implantate including a permanent magnet shaped to at least in part surround the intestine for implantation in the vicinity of the orifice and being, with respect to the intestine--axially magnetized; a closure plug comprising a core of magnetic material and a casing, surrounding the core, of a biologically compatible, compressible material, the casing being so shaped that the core surrounded by it can assume an axial equilibrium position with respect to the diametrically and axially directed magnetic interaction forces between the permanent magnet of the implantate, and the core of the closure plug.
Claim 2
Dependent Claim
108 words
In combination with a magnetically secured closure for the orifice of an intestine, having an implantate including a permanent magnet shaped to at least in part surround the intestine for implantation in the vicinity of the orifice and being, with respect to the intestine--axially magnetized; a closure plug comprising a core of magnetic material and a casing, surrounding the core, of a biologically compatible, compressible material, the casing being so shaped that the core surrounded by it can assume an axial equilibrium position with respect to the diametrically and axially directed magnetic interaction forces between the permanent magnet of the implantate, and the core of the closure plug.
Claim 3
Dependent Claim
42 words
A closure plug in accordance with claim 1, wherein the casing consists of a material which, when the closure plug is inserted into the intestine in the vicinity of the orifice, can be compressed radially; and which is separable from the core.
Claim 4
Dependent Claim
17 words
A closure plug in accordance with claim 2, wherein the material of the casing is an elastomer.
Claim 5
Dependent Claim
26 words
A closure plug in accordance with claim 2, wherein the casing in the unused condition is substantially cylindrical in shape and consists of an elastic material.
Claim 6
Dependent Claim
17 words
A closure plug in accordance with claim 2, wherein the casing consists of an elastic foam material.
Claim 7
Dependent Claim
24 words
A closure plug in accordance with claim 1, wherein the plug is formed with a passage through which gases can escape from the intestine.
Claim 8
Dependent Claim
17 words
A closure plug in accordance with claim 1, wherein the casing consists of a gas permeable material.
Claim 9
Dependent Claim
27 words
A closure plug in accordance with claim 1, wherein the core comprises an axially magnetized rod magnet, which is surrounded by the envelope of biologically compatible material.
Claim 10
Dependent Claim
22 words
A closure plug in accordance with claim 1, wherein the plug is formed with an eye for attachment of a thread thereto.
Claim 11
Dependent Claim
164 words
A closure device for an intestinal orifice, comprising an annular implantate, which includes at least one axially magnetized permanent magnet shaped for implantation to surround a zone of the intestine adjacent to its orifice; and a closure plug which includes a body of magnetic material and a casing surrounding it with a radially peripheral sealing surface, the plug being essentially cylindrical and shaped such that when the closure plug is inserted into the intestinal orifice its casing tends to center the body radially in the intestine; and wherein the magnetization of the magnetic system formed by the permanent magnet of the implantate and the body of magnetic material holds said plug in an axial normal position in the body and forming an axial equilibrium position with respect to magnetic forces of interaction between the implantate and the body whereby, upon movement of the plug out of this equilibrium position, magnetic forces are produced which tend to draw the body back into the equilibrium position.
Claim 12
Dependent Claim
164 words
A closure device for an intestinal orifice, comprising an annular implantate, which includes at least one axially magnetized permanent magnet shaped for implantation to surround a zone of the intestine adjacent to its orifice; and a closure plug which includes a body of magnetic material and a casing surrounding it with a radially peripheral sealing surface, the plug being essentially cylindrical and shaped such that when the closure plug is inserted into the intestinal orifice its casing tends to center the body radially in the intestine; and wherein the magnetization of the magnetic system formed by the permanent magnet of the implantate and the body of magnetic material holds said plug in an axial normal position in the body and forming an axial equilibrium position with respect to magnetic forces of interaction between the implantate and the body whereby, upon movement of the plug out of this equilibrium position, magnetic forces are produced which tend to draw the body back into the equilibrium position.
Claim 13
Dependent Claim
17 words
A closure device in accordance with claim 10, wherein the body is an axially magnetized rod magnet.
Claim 14
Dependent Claim
18 words
A closure device in accordance with claim 1, wherein the implantate comprises an axially magnetized annular permanent magnet.
Claim 15
Dependent Claim
32 words
A closure device in accordance with claim 10 wherein the implantate comprises at least two annular permanent magnets, which are arranged with an axial spacing between them and are oppositely axially magnetized.
Claim 16
Dependent Claim
30 words
A closure device in accordance with claim 10, wherein the casing consists of a biologically compatible, elastically compressible material to effect elastic sealing engagement with the intestine adjacent its orifice.
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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) | 1982-05-14 | 1982-11-13 | 1983-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-14 | 1986-11-13 | 1987-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-14 | 1990-11-13 | 1991-05-15 | $7700.00 | Window Closed / Lapsed |