Patent US3914002A successfully refreshed from Google Patents.
US3914002A
Expired / Lapsed
US
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Conductive tubing and method of making same
Assignee: Sherwood Medical Co
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Filing: 1974-04-17
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Granted: 1975-10-21
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Expires: 1994-04-17
Abstract
Abstract A conductive plastic tube for preventing the accumulation of electrostatic charges having a conductive plastic stripe to be grounded and an integral tube connector provided with a conductive plastic coating covering the open end including external and internal walls of the connector and a portion of the stripe. The connector is adapted to connect the tube to another member in fluid tight relation and to electrically connect the conductive stripe to a conductive element of the other member. The tubing is extruded with a conductive stripe and spaced integral conical portions serving as end connectors when severed. The connector is dipped in a solvent dispersion of conductive plastic and thereafter removed and allowed to dry to produce a conductive plastic coating on the connector end.
Inventors
- 👤 Mayer Berliner
- 👤 James G Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:40
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/0087; A61M16/04; A61M25/00; A61M25/0009; A61M25/0043; A61M25/0045; B; B29; B29C; B29C48/00; B29C48/03; B29C48/13; B29C48/16; B29C48/18; B29C48/19; B29C48/20; B29C49/00; B29C49/02; B29C49/04; B29C49/04102; F; F16; F16L; F16L11/00; F16L11/04; F16L11/12; F16L11/127; F16L25/00; F16L25/01; H; H05; H05F; H05F3/00; H05F3/02; A61M2205/00; A61M2205/02; A61M2205/0233; B29C48/09; B29C48/12; B29C48/21
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
223 words
A medical tube comprising a tubular member of plastic material including an integral connector at one end having an interior wall tapering radially outwardly toward the free end thereof for receiving in fluid tight communication another member having electrically conductive means on the exterior thereof, an electrically conductive plastic stripe adhering to and extending generally longitudinally along substantially the entire length of said tubular member for preventing the accumulation of electrostatic charges on the tube, said stripe having a width substantially narrower than that of said tubular member and having the radially outer surface thereof exposed, and a coating of electrically conductive plastic material adhering to said connector and including a coating portion on the exterior wall of said connector covering and in electrical contact with a part of said stripe, a coating portion on the interior wall of said connector extending over a substantial circumferential surface area thereof for electrical contact engagement with the conductive means on the other member when the other member is connected in fluid communication with said connector, and a coating portion on the free end of said connector electrically connecting the coating portion on the interior wall of said connector to the coating portion on the exterior wall of said connector, the thickness of said coating being less than that of the wall of said tubular member.
Claim 2
Dependent Claim
223 words
A medical tube comprising a tubular member of plastic material including an integral connector at one end having an interior wall tapering radially outwardly toward the free end thereof for receiving in fluid tight communication another member having electrically conductive means on the exterior thereof, an electrically conductive plastic stripe adhering to and extending generally longitudinally along substantially the entire length of said tubular member for preventing the accumulation of electrostatic charges on the tube, said stripe having a width substantially narrower than that of said tubular member and having the radially outer surface thereof exposed, and a coating of electrically conductive plastic material adhering to said connector and including a coating portion on the exterior wall of said connector covering and in electrical contact with a part of said stripe, a coating portion on the interior wall of said connector extending over a substantial circumferential surface area thereof for electrical contact engagement with the conductive means on the other member when the other member is connected in fluid communication with said connector, and a coating portion on the free end of said connector electrically connecting the coating portion on the interior wall of said connector to the coating portion on the exterior wall of said connector, the thickness of said coating being less than that of the wall of said tubular member.
Claim 3
Dependent Claim
13 words
The medical tube of claim 1 wherein said tubular member comprises vinyl chloride.
Claim 4
Dependent Claim
15 words
The medical tube of claim 2 wherein said stripe and said coating comprise conductive carbon.
Claim 5
Dependent Claim
23 words
The medical tube of claim 1 wherein said tubular member, said stripe, and said coating all include the same type of plastic material.
Claim 6
Dependent Claim
16 words
The medical tube of claim 4 wherein said same type of plastic material comprises vinyl chloride.
Claim 7
Dependent Claim
19 words
The medical tube of claim 1 wherein the thickness of said coating is less than 0.01 of an inch.
Claim 8
Independent Claim
199 words
The method of making a medical tube with means for preventing the accumulation of electrostatic charges thereon and adapted for connection with another member which has conductive means thereon, comprising the steps of forming a tube of plastic material having a stripe of electrically conductive plastic material having a width substantially narrower than the width of the tube and adhering to and extending along substantially the entire length of the tube with the radial outer surface thereof exposed, and an integral tube connector at one end of the tube with the interior walls thereof tapering radially outwardly toward the free end thereof for receiving said other member in fluid tight frictional engagement, applying a liquid coating comprising an electrically conductive material and a plastic material onto said connector to coat the interior, exterior, and free end walls of said connector with the coating on the exterior of said connector extending over a portion of said stripe and in electrical contact therewith, and solidifying the coating in situ to form a conductive plastic coating adhering to said connector for connecting the conductive means of the other member when it is connected to said connector in electrical connection with said stripe.
Claim 9
Independent Claim
199 words
The method of making a medical tube with means for preventing the accumulation of electrostatic charges thereon and adapted for connection with another member which has conductive means thereon, comprising the steps of forming a tube of plastic material having a stripe of electrically conductive plastic material having a width substantially narrower than the width of the tube and adhering to and extending along substantially the entire length of the tube with the radial outer surface thereof exposed, and an integral tube connector at one end of the tube with the interior walls thereof tapering radially outwardly toward the free end thereof for receiving said other member in fluid tight frictional engagement, applying a liquid coating comprising an electrically conductive material and a plastic material onto said connector to coat the interior, exterior, and free end walls of said connector with the coating on the exterior of said connector extending over a portion of said stripe and in electrical contact therewith, and solidifying the coating in situ to form a conductive plastic coating adhering to said connector for connecting the conductive means of the other member when it is connected to said connector in electrical connection with said stripe.
Claim 10
Dependent Claim
20 words
The method of claim 7 wherein the plastic materials of said tube, stripe, and coating are of the same type.
Claim 11
Dependent Claim
15 words
The method of claim 8 wherein said same type of plastic material comprises vinyl chloride.
Claim 12
Dependent Claim
18 words
The method of claim 9 wherein said liquid includes a solvent of the type that attacks vinyl chloride.
Claim 13
Dependent Claim
35 words
The method of claim 7 wherein said liquid includes a solvent of a type that attacks the plastic materials of said tube, stripe, and coating to bond said coating to said tube and said stripe.
Claim 14
Dependent Claim
31 words
The method of claim 11 wherein said step of forming said tube comprises extruding vinyl chloride compound in tube form, and simultaneously extruding said stripe with the extrusion of said tube.
Claim 15
Dependent Claim
24 words
The method of claim 7 wherein said step of applying the liquid coating comprises dipping the connector into a quantity of the liquid coating.
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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |