US4685447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tissue expander system
Assignee: PMT Inc
•
Filing: 1985-03-25
•
Granted: 1987-08-11
•
Expires: 2005-03-25
Abstract
Abstract Tissue expander system including a tissue expander, an injection port, and a tube connecting the tissue expander to the injection port. The tissue expander is of a one piece molded body of a pancake to waffle like configuration. Within the one piece molded body is a member of non-stick material of a slightly smaller geometrical shape similar to that of the one piece molded body. A self-sealing valve member closes off the tube in the tissue expander after injection of a solution for expanding the tissue expander. A Dacron mesh can be embedded in members of the one piece body providing for directional expansion of the tissue expander. In an alternative embodiment, Dacron mesh can be provided in both the upper and lower members of the one piece body. An accordion configured perimeter also provides for upward directional expansion. The tissue expanders can assume any geometrical configuration, whether it be square, rectangular, circular, oval, or kidney shaped. The tissue expander can also be a small enough size for hands and toes, a miniature size for use on the face, or a large size for use on the chest or other body area. A self-sealing injection port can be domed or cylindrical, and includes a stainless steel bottom, as well as a Dacron mesh impregnated silicone top. The stainless steel bottom provides for limiting injection needle penetration and for injection port location during X-ray procedure.
Inventors
- 👤 Alfred A. Iversen
- 👤 William J. Eastman
- 👤 Allen L. Van Beek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:42
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/0059; A61B; A61B90/00; A61B90/02; A61B90/39; Y; Y10; Y10S; Y10S128/00; Y10S128/14; Y10S128/20; Y10S128/21
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
98 words
Tissue expander for insertion between skin and flesh comprising: a. one piece molded member of an and a finite thickness and assuming a predetermined geometrical shape, said member including a lower surface and an upper surface with a molded edge formed by said surfaces, and an internal cavity therein; b. tube means secured to and extending partially into said cavity providing for fluid to pass into said member; and c. at least one sheet of non-stick PTFE material positioned between said upper and lower surface assuming said geometrical shape, and adjacent to an inner portion of said edge.
Claim 2
Dependent Claim
98 words
Tissue expander for insertion between skin and flesh comprising: a. one piece molded member of an and a finite thickness and assuming a predetermined geometrical shape, said member including a lower surface and an upper surface with a molded edge formed by said surfaces, and an internal cavity therein; b. tube means secured to and extending partially into said cavity providing for fluid to pass into said member; and c. at least one sheet of non-stick PTFE material positioned between said upper and lower surface assuming said geometrical shape, and adjacent to an inner portion of said edge.
Claim 3
Dependent Claim
25 words
Tissue expander of claim 1 comprising at least two sheets of non-stick material between said surfaces, said tube means extending in between said two sheets.
Claim 4
Dependent Claim
12 words
Tissue expander of claim 2 wherein each of said sheets of material.
Claim 5
Dependent Claim
17 words
Tissue expander of claim 1 comprising a valve means at said inner end of said tube means.
Claim 6
Dependent Claim
22 words
Tissue expander of claim 4 wherein said valve means comprises a section of said non-stick material over an end of said tube.
Claim 7
Dependent Claim
17 words
Tissue expander of claim 1 wherein said lower surface includes a mesh disposed within said lower surface.
Claim 8
Dependent Claim
16 words
Tissue expander of claim 1 wherein said edge includes accordion expansion means providing for directional expansion.
Claim 9
Dependent Claim
21 words
Tissue expander of claim 1 wherein said lower and upper surfaces include a mesh disposed with said lower and upper surfaces.
Claim 10
Dependent Claim
11 words
Tissue expander of claim 1 wherein said geometrical shape is square.
Claim 11
Dependent Claim
11 words
Tissue expander of claim 1 wherein said geometrical shape is rectangular.
Claim 12
Dependent Claim
11 words
Tissue expander of claim 1 wherein said geometrical shape is oval.
Claim 13
Dependent Claim
12 words
Tissue expander of claim 1 wherein said geometrical shape is kidney shaped.
Claim 14
Dependent Claim
12 words
Tissue expander of claim 1 wherein said geometrical shape is a donut.
Claim 15
Dependent Claim
11 words
Tissue expander of claim 1 wherein said geometrical shape is oblong.
Claim 16
Dependent Claim
11 words
Tissue expander of claim 1 wherein said geometrical shape is circular.
Claim 17
Dependent Claim
21 words
Tissue expander of claim 1 comprising injection port means connected to said tube means for passing of fluid to said member.
Claim 18
Dependent Claim
14 words
Tissue expander of claim 16 wherein said injection port includes a raised dome member.
Claim 19
Dependent Claim
17 words
Tissue expander of claim 17 wherein said dome member includes a mesh disposed with said dome member.
Claim 20
Dependent Claim
96 words
Tissue expander comprising: a. one piece molded silicone rubber member of a finite thickness and of a predetermined geometrical shape, said member including a lower surface and an upper surface, a molded edge formed at a junction of said surfaces, and a cavity formed therein; b. tube means extending into said cavity at said edge providing for fluid to pass into said member; and, c. two sheets of non-stick PTFE material between said surfaces and an end of said tube, said material of a smaller surface area than that of said geometrical shape of said surfaces.
Claim 21
Dependent Claim
96 words
Tissue expander comprising: a. one piece molded silicone rubber member of a finite thickness and of a predetermined geometrical shape, said member including a lower surface and an upper surface, a molded edge formed at a junction of said surfaces, and a cavity formed therein; b. tube means extending into said cavity at said edge providing for fluid to pass into said member; and, c. two sheets of non-stick PTFE material between said surfaces and an end of said tube, said material of a smaller surface area than that of said geometrical shape of said surfaces.
Claim 22
Dependent Claim
102 words
Tissue expander comprising: a. one piece molded member of a finite thickness and of a predetermined geometrical shape, said member including a lower surface and an upper surface, a molded edge formed at a junction of said surfaces, and a cavity formed therein; b. tube means extending into said member at said edge providing for fluid to pass into said member including a valve means for checking fluid flow; and, c. one sheet of non-stick PTFE material between said surfaces and an end of said tube, said material of a smaller surface area than that of said geometrical shape of said surfaces.
Claim 23
Dependent Claim
102 words
Tissue expander comprising: a. one piece molded member of a finite thickness and of a predetermined geometrical shape, said member including a lower surface and an upper surface, a molded edge formed at a junction of said surfaces, and a cavity formed therein; b. tube means extending into said member at said edge providing for fluid to pass into said member including a valve means for checking fluid flow; and, c. one sheet of non-stick PTFE material between said surfaces and an end of said tube, said material of a smaller surface area than that of said geometrical shape of said surfaces.
Claim 24
Dependent Claim
16 words
Tissue expander of claim 20 including at least one surface with an impregnated polyethylene terephthalate mesh.
Claim 25
Dependent Claim
19 words
Tissue expander of claim 20 wherein said valve means comprises a flap of said material about said tube means.
Claim 26
Dependent Claim
13 words
Tissue expander of claim 22 wherein said edge includes an accordion expansion means.
Claim 27
Dependent Claim
17 words
Tissue expander of claim 23 wherein at least one of said surfaces includes a polyethylene terephthalate mesh.
Claim 28
Dependent Claim
14 words
Tissue expander of claim 20 wherein said one piece molded member is silicone rubber.
Claim 29
Dependent Claim
16 words
Tissue expander of claim 20 including a dome injection port means connected to said tube means.
Claim 30
Dependent Claim
16 words
Tissue expander of claim 26 wherein a metal base is provided in said injection port means.
Claim 31
Dependent Claim
12 words
Tissue expander of claim 26 comprising a mesh embedded in said dome.
Claim 32
Dependent Claim
15 words
Tissue expander of claim 26 wherein said injection port is a one piece molded assembly.
References Cited (Backward Citations)
US2842775A
Cited
US3528869A
Cited
US3831583A
Cited
US4217889A
Cited
US4190040A
Cited
US4413359A
Cited
US4536179A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-10 | 1991-02-09 | 1991-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-10 | 1995-02-09 | 1995-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-10 | 1999-02-09 | 1999-08-11 | $7700.00 | Window Closed / Lapsed |