US3735024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-pressure and hermetic electrical feed-through apparatus
Assignee: D G OBrien Inc
•
Filing: 1971-05-10
•
Granted: 1973-05-22
•
Expires: 1991-05-10
Abstract
Abstract A leak-proof and pressure-tight seal at the passage of an electrical current conductor through a wall employs an electrical conductor which is tubular and contains therein a core of hard material having a low coefficient of thermal expansion. A collarlike electrically insulating member encircles the conductor about the core and radially compresses the conductor inward onto the core. The insulating member is seated in the conductor-passing aperture in the wall and the wall exerts significant radial compression onto the collar-like member to compress it firmly against the tubular conductor. Further, the cross-sectional area of the conductor around the core is not substantially less than, and preferably is at least equal to, the cross-sectional area of the conductor elsewhere along its length.
Inventors
- 👤 E Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:55
CPC Classifications
H; H01; H01B; H01B17/00; H01B17/26; H01B17/30; H01B17/303; H01B17/308; Y; Y10; Y10S; Y10S228/00; Y10S228/903; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
162 words
Apparatus for securing an electrical conductor with an essentially leak-proof pressure-tight seal to a wall member through which the conductor passes, said apparatus comprising A. a substantially homogeneous and solid core of a first material fusible at a first temperature, B. a tubular electrical conductor of a second material containing said core therein and being radially compressed thereagainst, C. a collar-like member of electrically insulating material fusible at said first temperature, said collar-like member encircling said conductor about said core and being radially compressed thereonto, D. a pressure-barrier having an aperture therethrough, and having said conductor passing through said barrier at said aperture with said collar-like member disposed in said aperture, and radially compressed onto said collar-like member, E. each of said collar-like member, said barrier, and said core being of material harder than the material of said conductor, and each of said conductor and said pressure-barrier being solid at said first temperature and melting only at a temperature in excess thereof.
Claim 2
Dependent Claim
162 words
Apparatus for securing an electrical conductor with an essentially leak-proof pressure-tight seal to a wall member through which the conductor passes, said apparatus comprising A. a substantially homogeneous and solid core of a first material fusible at a first temperature, B. a tubular electrical conductor of a second material containing said core therein and being radially compressed thereagainst, C. a collar-like member of electrically insulating material fusible at said first temperature, said collar-like member encircling said conductor about said core and being radially compressed thereonto, D. a pressure-barrier having an aperture therethrough, and having said conductor passing through said barrier at said aperture with said collar-like member disposed in said aperture, and radially compressed onto said collar-like member, E. each of said collar-like member, said barrier, and said core being of material harder than the material of said conductor, and each of said conductor and said pressure-barrier being solid at said first temperature and melting only at a temperature in excess thereof.
Claim 3
Dependent Claim
28 words
Apparatus as defined in claim 1 in which the cross-sectional area of said conductor around said core is not substantially less than the cross-sectional area of said core.
Claim 4
Dependent Claim
28 words
having at said hollow median section a first cross-sectional area of said conductive material not substantially less than the minimum cross-sectional area of said conductive material elsewhere therealong,
Claim 5
Dependent Claim
28 words
having at said hollow median section a first cross-sectional area of said conductive material not substantially less than the minimum cross-sectional area of said conductive material elsewhere therealong,
Claim 6
Dependent Claim
55 words
a tubular portion radially outward from said aperture and extending from said panel portion along the same direction as the passage of said aperture for a distance at least equal to said first thickness, E. each of said collar-like member, said barrier, and said core being of material harder than the material of said conductor.
Claim 7
Dependent Claim
55 words
a tubular portion radially outward from said aperture and extending from said panel portion along the same direction as the passage of said aperture for a distance at least equal to said first thickness, E. each of said collar-like member, said barrier, and said core being of material harder than the material of said conductor.
Claim 8
Dependent Claim
42 words
secured to said plate member with said pin passing through said first aperture, sealing said first aperture closed, and with the thickness thereof at least partly removed from the thickness of said plate member along the direction in which said apertures pass.
Claim 9
Dependent Claim
42 words
secured to said plate member with said pin passing through said first aperture, sealing said first aperture closed, and with the thickness thereof at least partly removed from the thickness of said plate member along the direction in which said apertures pass.
Claim 10
Dependent Claim
27 words
having a free end on at least one said further section and having first sleeve means at said free end for telescopically seating an electrical conductor therein,
Claim 11
Dependent Claim
27 words
having a free end on at least one said further section and having first sleeve means at said free end for telescopically seating an electrical conductor therein,
Claim 12
Dependent Claim
19 words
disposed with said median section extending within said aperture for at least a first length and spaced inwardly therefrom,
Claim 13
Dependent Claim
19 words
disposed with said median section extending within said aperture for at least a first length and spaced inwardly therefrom,
Claim 14
Dependent Claim
146 words
passing through said aperture with said median section extending within said aperture for at least a first length and spaced inwardly therefrom, C. a solid and substantially homogeneous body filling said hollow median section and radially compressed thereagainst substantially along said first length thereof, said body being of a material which melts at a temperature below the melting temperatures of, and which when solid is harder than, the materials of said barrier means and of said first member, and D. an annular collar-like seal encircling said median section along said first length thereof and sealing the space therealong between said median section and the aperture-defining walls of said barrier means, said seal being of an electrically insulating material which melts at a temperature below the melting temperatures of, and which when solid is harder than, the materials of said barrier means and of said first member.
Claim 15
Dependent Claim
146 words
passing through said aperture with said median section extending within said aperture for at least a first length and spaced inwardly therefrom, C. a solid and substantially homogeneous body filling said hollow median section and radially compressed thereagainst substantially along said first length thereof, said body being of a material which melts at a temperature below the melting temperatures of, and which when solid is harder than, the materials of said barrier means and of said first member, and D. an annular collar-like seal encircling said median section along said first length thereof and sealing the space therealong between said median section and the aperture-defining walls of said barrier means, said seal being of an electrically insulating material which melts at a temperature below the melting temperatures of, and which when solid is harder than, the materials of said barrier means and of said first member.
Claim 16
Dependent Claim
24 words
Apparatus as defined in claim 1 in which said pressure barrier is of metal and said core and collar-like member are of vitreous material.
Claim 17
Dependent Claim
51 words
Apparatus as defined in claim 1 in which A. said pressure barrier is heat-shrunk onto said collar-like member to exert said radial compression onto it, B. said core is of material having a lower coefficient of thermal expansion than said conductor, and C. said tubular conductor is heat-shrunk onto said core.
Claim 18
Dependent Claim
130 words
having the wall of said hollow median section forming an annular area, along a first plane transverse to the length of said median section, not substantially less than the area along a plane parallel thereto which said sleeve means encircles, C. a solid and substantially homogeneous core of fused-in-place material filling said hollow median Section at least substantially along said first length thereof, and D. an annular collar-like seal of vitreous material fused in place encircling said median section along said first length thereof and sealing the space therealong between said median section and the aperture-defining walls of said bulkhead, E. each of said core and said seal being of material which melts at a temperature below the melting temperature of the materials of said bulkhead and of said pin.
Claim 19
Dependent Claim
130 words
having the wall of said hollow median section forming an annular area, along a first plane transverse to the length of said median section, not substantially less than the area along a plane parallel thereto which said sleeve means encircles, C. a solid and substantially homogeneous core of fused-in-place material filling said hollow median Section at least substantially along said first length thereof, and D. an annular collar-like seal of vitreous material fused in place encircling said median section along said first length thereof and sealing the space therealong between said median section and the aperture-defining walls of said bulkhead, E. each of said core and said seal being of material which melts at a temperature below the melting temperature of the materials of said bulkhead and of said pin.
Claim 20
Dependent Claim
27 words
Apparatus as defined in claim 1 in which said pressure barrier radially compresses said collar-like member onto said conductor with sufficient force to deform said conductor permanently.
Claim 21
Dependent Claim
64 words
Apparatus as defined in claim 1 further comprising an electrically conducting tubular member of said second material joined to an end of said tubular conductor and applying an electrical conductor telescopically seated therein in series with said tubular conductor, said tubular member having a conductor-receiving bore therein with a cross-sectional area not substantially greater than the cross-sectionAl area of said conductor around said core.
Claim 22
Dependent Claim
30 words
Apparatus as defined in claim 1 further characterized in that said barrier is of a material harder than said conductor and softer than either said core or said collar-like member.
Claim 23
Dependent Claim
43 words
Apparatus as defined in claim 1 in which said barrier is of material harder than said first member, softer than said core and than said collar-like member, and having a greater coefficient of thermal expansion than said core and than said collar-like member.
Claim 24
Dependent Claim
28 words
Apparatus as defined in claim 1 in which said second material of said conductor has a greater coefficient of thermal expansion than said first material of said core.
Claim 25
Dependent Claim
27 words
Apparatus as defined in claim 1 in which said conductor is of copper and said barrier is of stainless steel and said collar-like member is of glass.
Claim 26
Dependent Claim
46 words
Apparatus for securing an electrical conductor with an essentially leak-proof pressure-tight seal to a wall member through which the conductor passes, said apparatus comprising A. means forming a pressure barrier having a conductor-passing aperture therethrough, B. an elongated first member of electrically conductive material, said member
Claim 27
Dependent Claim
46 words
Apparatus for securing an electrical conductor with an essentially leak-proof pressure-tight seal to a wall member through which the conductor passes, said apparatus comprising A. means forming a pressure barrier having a conductor-passing aperture therethrough, B. an elongated first member of electrically conductive material, said member
Claim 28
Dependent Claim
53 words
Apparatus as defined in claim 11 further characterized in that A. said first member has a coefficient of thermal expansion greater than that of said second material, and B. said barrier means is of a material having a coefficient of thermal expansion greater than that of said second material and of said seal.
Claim 29
Dependent Claim
30 words
Electrical feed-through apparatus comprising A. wall means forming a pressure bulkhead having a conductor-passing aperture therethrough, B. an electrical conductor-connecting pin disposed in and extending through said aperture, said pin
Claim 30
Dependent Claim
30 words
Electrical feed-through apparatus comprising A. wall means forming a pressure bulkhead having a conductor-passing aperture therethrough, B. an electrical conductor-connecting pin disposed in and extending through said aperture, said pin
Claim 31
Dependent Claim
73 words
Apparatus as defined in claim 13 in which A. said pin is of material softer than the materials of said bulkhead, said core, and said seal, B. said bulkhead is of material having a coefficient of thermal expansion larger than that of the materials of said core and of said seal, and C. said pin is of material having a coefficient of thermal expansion larger than that of the material of said core.
Claim 32
Dependent Claim
29 words
Apparatus as defined in claim 13 in which said wall means comprises A. a plate member of first thickness and with a first aperture therethrough, B. a panel member
Claim 33
Dependent Claim
106 words
Apparatus for securing an electrical conductor with an essentially leak-proof pressure-tight seal to a wall member through which the conductor passes, said apparatus comprising A. a core of a first material, B. a tubular electrical conductor of a second material containing said core therein and being radially compressed thereagainst, C. a collar-like member of electrically insulating material encircling said conductor about said core and being radially compressed thereagainst, D. a pressure barrier having an aperture therethrough, and having said conductor passing through said barrier at said aperture with said collar-like member disposed in said aperture, and radially compressed onto said collar-like member, said pressure barrier comprising
Claim 34
Dependent Claim
106 words
Apparatus for securing an electrical conductor with an essentially leak-proof pressure-tight seal to a wall member through which the conductor passes, said apparatus comprising A. a core of a first material, B. a tubular electrical conductor of a second material containing said core therein and being radially compressed thereagainst, C. a collar-like member of electrically insulating material encircling said conductor about said core and being radially compressed thereagainst, D. a pressure barrier having an aperture therethrough, and having said conductor passing through said barrier at said aperture with said collar-like member disposed in said aperture, and radially compressed onto said collar-like member, said pressure barrier comprising
Claim 35
Dependent Claim
47 words
Apparatus as defined in claim 16 further characterized in that said wall member includes a further panel portion parallel to said panel portion of said barrier and with an opening therethrough, said further panel portion mounting said barrier at said opening by means of said tubular portion.
Claim 36
Independent Claim
166 words
A method of securing an electrical conductor with an essentially leak-proof pressure-tight seal to a wall member through which the conductor passes, said method comprising the steps of A. providing a pressure barrier with a conductor-passing aperture therethrough, B. disposing said conductor passing through said pressure barrier centered within said aperture and radially spaced inwardly therefrom, C. providing a central hollow in said conductor at least along the length thereof within said pressure barrier and with a cross-sectional area substantially equal to the cross-sectional area of said conductor outward of said hollow, D. filling said radial space between said conductor and said pressure barrier with vitreous material and filling said length of said hollow with vitreous material, E. providing said vitreous materials to have lower melting temperatures and lesser coefficients of thermal expansion, than the materials of said conductor and of said pressure barriEr, F. heating said assembled pressure-barrier, conductor, and vitreous materials to fuse said vitreous materials in place, and G. cooling said assembled elements.
Claim 37
Independent Claim
166 words
A method of securing an electrical conductor with an essentially leak-proof pressure-tight seal to a wall member through which the conductor passes, said method comprising the steps of A. providing a pressure barrier with a conductor-passing aperture therethrough, B. disposing said conductor passing through said pressure barrier centered within said aperture and radially spaced inwardly therefrom, C. providing a central hollow in said conductor at least along the length thereof within said pressure barrier and with a cross-sectional area substantially equal to the cross-sectional area of said conductor outward of said hollow, D. filling said radial space between said conductor and said pressure barrier with vitreous material and filling said length of said hollow with vitreous material, E. providing said vitreous materials to have lower melting temperatures and lesser coefficients of thermal expansion, than the materials of said conductor and of said pressure barriEr, F. heating said assembled pressure-barrier, conductor, and vitreous materials to fuse said vitreous materials in place, and G. cooling said assembled elements.
Claim 38
Dependent Claim
38 words
The method defined in claim 18 comprising the further steps of providing said wall member with an aperture therethrough, and affixing said pressure barrier with said conductor secured therein to said wall member to close said aperture therethrough.
References Cited (Backward Citations)
US1271245A
Cited
US2190302A
Cited
US2483940A
Cited
FR1278366A
Cited
DE1490332A1
Cited
US3303268A
Cited
US3520989A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |