US3601877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making prosthetic cardiac valve
Assignee: LANCER SCIENTIFIC CORP
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Filing: 1970-01-12
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Granted: 1971-08-31
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Expires: 1990-01-12
Abstract
Abstract A method for making a heart valve of the type having a frame with a ring member adapted for attaching a sewing ring and having a seat for a valve element and either one or two extending arms, each arm having smaller rings on their extremities and being aligned with the center axis of the main ring. The valve element for an aorta valve has protrusions for extending through the smaller rings to either side of main ring and a portion adapted for sitting in the seat which is a section of a sphere less than a hemisphere on one side and a truncated cone on the other. The mitral valve has a generally lenticular shaped member with a Tshaped protrusion extending therefrom for passing through a smaller ring. Several embodiments of the method are provided to produce a high-quality valve utilizing commercially available tubing in one embodiment, sheet material for stamping in another embodiment and bar stock in a third embodiment.
Inventors
- 👤 Carl C Goosen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:59
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2409; A61F2/2421; Y; Y10; Y10S; Y10S623/00; Y10S623/901; Y10T; Y10T29/00; Y10T29/49; Y10T29/49405; Y10T29/49412; Y10T29/49416; Y10T29/49419; Y10T29/49423
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
155 words
A method of making a prosthetic cardiac valve for replacement of diseased valves comprising the steps of: a. Cutting metal tubing to a predetermined length; b. inserting a die in each end of said cut tubing; c. shaping an annular groove in said cut tubing between the ends thereof in accordance with said dies inserted therein; d. removing portions of the tubing walls of said cut and shaped tubing to form at least one arm having a guide ring on the end thereof; each said arm extending to one side of said annular groove; e. bending said arm to align the approximate center of said guide ring with the approximate center axis of said cut and shaped tubing to complete a valve frame; f. forming a valve element of a flexible material having at least one protrusiOn extending therefrom; and g. inserting each said protrusion through one said guide ring to produce a heart valve.
Claim 2
Independent Claim
155 words
A method of making a prosthetic cardiac valve for replacement of diseased valves comprising the steps of: a. Cutting metal tubing to a predetermined length; b. inserting a die in each end of said cut tubing; c. shaping an annular groove in said cut tubing between the ends thereof in accordance with said dies inserted therein; d. removing portions of the tubing walls of said cut and shaped tubing to form at least one arm having a guide ring on the end thereof; each said arm extending to one side of said annular groove; e. bending said arm to align the approximate center of said guide ring with the approximate center axis of said cut and shaped tubing to complete a valve frame; f. forming a valve element of a flexible material having at least one protrusiOn extending therefrom; and g. inserting each said protrusion through one said guide ring to produce a heart valve.
Claim 3
Dependent Claim
20 words
The method in accordance with claim 1 but including the step of attaching a sewing ring to said annular groove.
Claim 4
Dependent Claim
16 words
The method in accordance with claim 2 but including the step of polishing said valve frame.
Claim 5
Dependent Claim
16 words
The method in accordance with claim 3 but including the step of coating said valve frame.
Claim 6
Dependent Claim
27 words
The method in accordance with claim 4 in which the step of removing portions of the tubing walls includes drilling guide ring holds in each such arm.
Claim 7
Dependent Claim
75 words
The method in accordance with claim 5 in which said step of removing portions of the tubing walls includes forming a pair of arms one extending perpendicular from each side of said annular groove and each arm having a guide ring on its extremity and said valve element has a pair of protrusions extending in opposite directions for the main valve element body, one protrusion being inserted into each of said pair of guide rings.
Claim 8
Dependent Claim
20 words
The method in accordance with claim 6 in which said step of cutting metal tubing is cutting stainless steel tubing.
Claim 9
Dependent Claim
20 words
The method in accordance with claim 7 in which said step of coating includes coating said valve frame with Teflon.
Claim 10
Independent Claim
144 words
A method for making a prosthetic cardiac valve for replacement of diseased valves comprising the steps of: a. Removing portions of metal from a solid metal bar to form a hollow annular groove on one end of said metal; b. drilling a bore along the axis of the hollow annular groove; c. parting the end of said material having the annular groove; d. milling the parted piece of material to form an annular grooved ring with an arm extended therefrom; said arm having a guide ring formed around said drilled bore and aligned with the said axis of said grooved ring to form a valve frame; e. polishing said valve frame; f. forming a valve element of a flexible material having a T-shaped protrusion therefrom; and g. inserting said T-shaped protrusion through said grooved ring and through said guide ring, producing a heart valve.
Claim 11
Independent Claim
144 words
A method for making a prosthetic cardiac valve for replacement of diseased valves comprising the steps of: a. Removing portions of metal from a solid metal bar to form a hollow annular groove on one end of said metal; b. drilling a bore along the axis of the hollow annular groove; c. parting the end of said material having the annular groove; d. milling the parted piece of material to form an annular grooved ring with an arm extended therefrom; said arm having a guide ring formed around said drilled bore and aligned with the said axis of said grooved ring to form a valve frame; e. polishing said valve frame; f. forming a valve element of a flexible material having a T-shaped protrusion therefrom; and g. inserting said T-shaped protrusion through said grooved ring and through said guide ring, producing a heart valve.
Claim 12
Dependent Claim
30 words
The method of making a prosthetic cardiac valve in accordance with claim 9 but including the step of radiusing corners following the step of milling the parted pieces of material.
Claim 13
Dependent Claim
54 words
The method in accordance with claim 10 in which said valve element is generally lenticular shaped with a T-shaped protrusion extending from the center thereof. 12 The method according to claim 11 in which said step of removing portions of metal from a solid metal bar is removing metal from a stainless steel bar.
Claim 14
Dependent Claim
17 words
The method according to claim 12 but including the step of coating said valve frame with Teflon.
Claim 15
Dependent Claim
27 words
The method in accordance with claim 13 but including the step of attaching a sewing ring to said annular groove for attaching said valve to a heart.
Claim 16
Independent Claim
119 words
A method of making a prosthetic cardiac valve for replacement of diseased valves comprising the steps of: a. Stamping a main ring having at least one extending arm therefrom with a guide ring through the extremities of each said arm from a metal sheet; b. pressing an annular groove and a valve seat into said main ring; c. bending each said arm to align each said guide ring center with the center of said main ring thereby forming a heart valve frame; d. polishing said frame; e. forming a check element adapted to fit in said seat and having at least one protrusion therefrom; f. inserting each said protrusion into one said guide ring to produce a heart valve.
Claim 17
Independent Claim
119 words
A method of making a prosthetic cardiac valve for replacement of diseased valves comprising the steps of: a. Stamping a main ring having at least one extending arm therefrom with a guide ring through the extremities of each said arm from a metal sheet; b. pressing an annular groove and a valve seat into said main ring; c. bending each said arm to align each said guide ring center with the center of said main ring thereby forming a heart valve frame; d. polishing said frame; e. forming a check element adapted to fit in said seat and having at least one protrusion therefrom; f. inserting each said protrusion into one said guide ring to produce a heart valve.
Claim 18
Dependent Claim
19 words
The method in accordance with claim 15 but including the step of radisuing all corners of said valve frame.
Claim 19
Dependent Claim
27 words
The method in accordance with claim 16 but including the step of attaching a sewing ring to said valve frame for sewing said valve into a heart.
Claim 20
Dependent Claim
40 words
The method in accordance with claim 17 in which said stamping a main ring having at least one extending arm has a pair of extending arms Extending in opposite directions, each said arm having a guide ring at its extremity.
Claim 21
Dependent Claim
43 words
The method in accordance with claim 18 but including the step of coating said valve frame with Teflon. 20 The method in accordance with claim 19 in which the step of stamping from sheet metal includes stamping from a sheet of stainless steel.
Claim 22
Dependent Claim
42 words
The method in accordance with claim 17 in which said stamping step includes stamping one extending arm having a guide ring on the end thereof and said forming a check element includes forming a lenticular-shaped check element with a single T-shaped protrusion.
Claim 23
Dependent Claim
40 words
The method in accordance with claim 21 in which said step of inserting said protrusion includes inserting said T-shaped protrusion through said main ring and said guide ring, said guide ring movably holding said check element to the valve frame.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |