US3900029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closed surgical evacuator
Assignee: Individual
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Filing: 1973-10-26
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Granted: 1975-08-19
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Expires: 1993-10-26
Abstract
Abstract A surgical evacuator is described which includes a magnetic purge valve wherein a magnetized, flap valve comprises a resilient membrane portion attached to a ferromagnetic portion. In one embodiment, the ferromagnetic portion is rigid and when the closure member is in a closed position, an unattached portion of the resilient membrane is in contact with a valve seat. In another embodiment, a resilient membrane is impregnated with magnetic particles rather than being attached to a rigid portion. An evacuator bag includes a resilient, cup-shaped portion which is compressible and expandable. The mouth of the resilient cupshaped portion is approximately at the widest cross-sectional perimeter of the resilient cup-shaped portion. There are two inlet ports into the evacuation bag, each including graduated plugs which can be cut to allow attachment thereto of various size tubes. A splash cap, including a plugged outlet port, encloses the purge valve. A tapered tube is attachable at the splash-cap outlet port so that the purge valve can be brought into communication with a sucking device.
Inventors
- 👤 Irving Melnick
- 👤 George W Oakes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:50
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/64; A61M1/68
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
318 words
A surgical evacuator for draining fluids from the body of a patient comprising: an evacuator bag, said evacuator bag being compressible and expandable to decrease and increase the internal volume of the evacuator bag; a drain inlet formed in said evacuator bag for connection to a drain tube adapted to drain fluids from the body of a patient into said evacuator bag; a purge port formed in said evacuator bag for evacuating fluids and air from said evacuator bag when said evacuator bag is compressed; and, a magnetic purge valve, said magnetic purge valve being a oneway valve mounted so as to allow fluid and air to exhaust from said evacuator bag through said purge port when said evacuator bag Is compressed, said magnetic purge valve rapidly closing upon termination of said compression so as to prevent contaminants from entering the bag through said purge port, said magnetic purge valve comprising: a valve-seat formed on said evacuator bag about said purge port, said valve seat including a ferromagnetic portion surrounding said purge port; and, a valve-closure member being hingedly attached adjacent said purge port so as to be movable between a closed position flat against said valve seat and an open position moved away from said valve seat, said valve-closure member comprising a ferromagnetic portion and a resilient membrane portion, said ferromagnetic portion and said resilient membrane portion being associated and attached to one another so as to form a flexible resilient membrane spanning said exhaust port, said spanning portion of said resilient membrane being unsupported by a rigid member so that it is free to flex into said exhaust port in response to a decrease in pressure in said evacuator bag and thereby be pulled tightly over an edge of said valve seat when said valve-closure member is in said closed position; one of said valve-seat ferromagnetic portion and said valveclosure member ferromagnetic portion being permanently magnetized.
Claim 2
Dependent Claim
318 words
A surgical evacuator for draining fluids from the body of a patient comprising: an evacuator bag, said evacuator bag being compressible and expandable to decrease and increase the internal volume of the evacuator bag; a drain inlet formed in said evacuator bag for connection to a drain tube adapted to drain fluids from the body of a patient into said evacuator bag; a purge port formed in said evacuator bag for evacuating fluids and air from said evacuator bag when said evacuator bag is compressed; and, a magnetic purge valve, said magnetic purge valve being a oneway valve mounted so as to allow fluid and air to exhaust from said evacuator bag through said purge port when said evacuator bag Is compressed, said magnetic purge valve rapidly closing upon termination of said compression so as to prevent contaminants from entering the bag through said purge port, said magnetic purge valve comprising: a valve-seat formed on said evacuator bag about said purge port, said valve seat including a ferromagnetic portion surrounding said purge port; and, a valve-closure member being hingedly attached adjacent said purge port so as to be movable between a closed position flat against said valve seat and an open position moved away from said valve seat, said valve-closure member comprising a ferromagnetic portion and a resilient membrane portion, said ferromagnetic portion and said resilient membrane portion being associated and attached to one another so as to form a flexible resilient membrane spanning said exhaust port, said spanning portion of said resilient membrane being unsupported by a rigid member so that it is free to flex into said exhaust port in response to a decrease in pressure in said evacuator bag and thereby be pulled tightly over an edge of said valve seat when said valve-closure member is in said closed position; one of said valve-seat ferromagnetic portion and said valveclosure member ferromagnetic portion being permanently magnetized.
Claim 3
Dependent Claim
115 words
A surgical evacuator as claimed in claim 1 wherein said evacuator bag has a resilient, cup-shaped portion which is compressible and expansible to decrease and increase the internal volume of the evacuator bag and includes a rigid portion covering the mouth of the resilient, cup-shaped portion, wherein the mouth of said resilient, cup-shaped portion is approximately at the widest cross-sectional perimeter of said resilient, cup-shaped portion, and said resilient, cup-shaped portion is constructed of a material having sufficient memory reliability such that when a bottom thereof is pressed toward said rigid portion covering said mouth, said bottom seeks to move away from the rigid portion and thereby causes a negative pressure inside the evacuator bag.
Claim 4
Dependent Claim
51 words
A surgical evacuator as claimed in claim 2 wherein a groove is formed on the inside surface of said evacuator-bag rigid portion into which an outer edge of said cup-shaped portion fits and said rigid portion includes an annular wall which extends along the outer surface of said resilient cup-shaped portion.
Claim 5
Dependent Claim
25 words
A surgical evacuator as claimed in claim 1 wherein said ferromagnetic portion comprises a plurality of ferromagnetic particles which are embedded in said resilient portion.
Claim 6
Dependent Claim
52 words
A surgical evacuator as claimed in claim 1 wherein is further included frangible plugs having stepped tapered lumens for either plugging said respective drain inlets or for being cut at selected longitudinal positions therealong to allow said lumens to receive various size drain tubes and thereby attached them to said respective inlets.
Claim 7
Dependent Claim
60 words
A surgical evacuator as claimed in claim 1 wherein is further included: a splash guard cap mounted on the outer surface of said evacuator bag covering said purge outlet, said splash guard cap defining an aperture for directing the flow of fluids purged from said purge port; and a plug for selectively closing and opening said splash guard cap aperture.
Claim 8
Dependent Claim
36 words
A surgical evacuator as claimed in claim 6 wherein said splash-guard cap includes an adaptor protruding from a main portion of said splash-guard cap for allowing said splash-guard cap to be attached to a suction source.
Claim 9
Dependent Claim
22 words
A surgical evaucator as claimed in claim 7 wherein said plug has the function of plugging the end of said adaptor means.
Claim 10
Dependent Claim
320 words
A surgical evacuator for draining fluids from the body of a patient comprising: an evacuator bag, said evacuator bag having a resilient, cup-shaped portion which is compressible and expandable to decrease and increase the internal volume of the evacuator bag, and having a rigid portion covering the mouth of said resilient cup-shaped portion; a drain inlet formed in said evacuator bag for Connection to a drain tube adapted to drain fluids from the body of a patient into said evacuator bag; a purge outlet formed in said evacuator bag for evacuating fluids and air from said evacuator bag when said evacuator bag is compressed; and a one-way purge valve forming a part of said purge outlet, said one-way purge valve being mounted so as to allow said fluids and air to exhaust from said evacuator bag when said evacuator bag is compressed, said one-way purge valve rapidly closing upon termination of said compression to prevent contaminants from entering said bag past said purge valve, wherein; the mouth of said resilient, cup-shaped portion is located approximately at the widest cross-sectional perimeter of said resilient, cup-shaped portion, and said resilient, cup-shaped portion is constructed of a material having sufficient memory reliability such that when a bottom thereof is pressed toward said rigid portion covering said mouth said bottom seeks to move away from said rigid portion and thereby cause a negative pressure inside said evacuator bag; and a groove is formed on the inside surface of said evacuator-bag rigid portion into which an outer edge of said cup-shaped portion fits and said rigid portion includes an annular wall which extends from said groove along the outer surface of said resilient cup shaped portion, the inner surface of said wall leading continuously and smoothly into said groove so that the outer surface of said resilient cup shaped portion is held in contact with the inner surface of said wall about the periphery thereof.
Claim 11
Dependent Claim
320 words
A surgical evacuator for draining fluids from the body of a patient comprising: an evacuator bag, said evacuator bag having a resilient, cup-shaped portion which is compressible and expandable to decrease and increase the internal volume of the evacuator bag, and having a rigid portion covering the mouth of said resilient cup-shaped portion; a drain inlet formed in said evacuator bag for Connection to a drain tube adapted to drain fluids from the body of a patient into said evacuator bag; a purge outlet formed in said evacuator bag for evacuating fluids and air from said evacuator bag when said evacuator bag is compressed; and a one-way purge valve forming a part of said purge outlet, said one-way purge valve being mounted so as to allow said fluids and air to exhaust from said evacuator bag when said evacuator bag is compressed, said one-way purge valve rapidly closing upon termination of said compression to prevent contaminants from entering said bag past said purge valve, wherein; the mouth of said resilient, cup-shaped portion is located approximately at the widest cross-sectional perimeter of said resilient, cup-shaped portion, and said resilient, cup-shaped portion is constructed of a material having sufficient memory reliability such that when a bottom thereof is pressed toward said rigid portion covering said mouth said bottom seeks to move away from said rigid portion and thereby cause a negative pressure inside said evacuator bag; and a groove is formed on the inside surface of said evacuator-bag rigid portion into which an outer edge of said cup-shaped portion fits and said rigid portion includes an annular wall which extends from said groove along the outer surface of said resilient cup shaped portion, the inner surface of said wall leading continuously and smoothly into said groove so that the outer surface of said resilient cup shaped portion is held in contact with the inner surface of said wall about the periphery thereof.
Claim 12
Dependent Claim
38 words
A surgical evacuator as claimed in claim 9 wherein said purge valve includes a magnetizable closure member and a valve seat having a magnetizable portion, said closure member being attracted to said magnetizable portion of said valve seat.
Claim 13
Dependent Claim
51 words
A surgical evacuator as claimed in claim 9 wherein is further included frangible plugs having stepped tapered lumens for plugging said respective drain inlets or for being cut at selected longitudinal positions therealong to allow said lumens to receive various size drain tubes and thereby attach them to said respective inlets.
Claim 14
Dependent Claim
60 words
A surgical evacuator as claimed in claim 9 wherein is further included: a splash guard cap mounted on the outer surface of said evacuator bag covering said purge outlet, said splash guard cap defining an aperture for directing the flow of fluids purged from said purge port; and a plug for selectively closing and opening said splash guard cap aperture.
Claim 15
Dependent Claim
36 words
A surgical evaucator as claimed in claim 12 wherein said splash-guard cap includes an adaptor protruding from a main portion of said splash-guard cap for allowing said splash-guard cap to be attached to a suction source.
Claim 16
Dependent Claim
22 words
A surgical evacuator as claimed in claim 13 wherein said plug has the function of plugging the end of said adaptor means.
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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |