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US4041240A
Expired / Lapsed
US
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Electrical feed-through assembly and method of making same
Assignee: Individual
•
Filing: 1975-12-08
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Granted: 1977-08-09
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Expires: 1995-12-08
Abstract
Abstract An electrical feed-through assembly adapted to be directly connected to a bulkhead assembly for conducting high voltage electrical energy between a low pressure and high pressure area. A hollow casing is removably connected by conventional means of packing glands to a bulkhead assembly. Conductors located within the casing are completely covered by dielectric materials that are bonded directly to each conductor. The conductors and the dielectric materials have different internal and external diameters to form increased bonding areas for withstanding high pressure differentials and high voltage differentials. A deformable dielectric bonding material bonds the conductors to the casing in the area of high pressure. A non-deformable dielectric bonding material adjacent to the deformable bonding material bonds the conductors to the remaining inside area of the casing.
Inventors
- 👤 Alexander D. Sipowicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:06
CPC Classifications
H; H01; H01B; H01B17/00; H01B17/26; H01B17/30; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
105 words
An electrical feed-through assembly comprising: a hollow tubular casing having means on the periphery for restraining and sealing said casing in a high differential pressure environment, a plurality of separate electrical conductors electrically insulated from each other and mechanically supported within the length of said hollow casing, separate rigid dielectric materials bonded to the end portions of each conductor for providing electrical insulation and mechanical rigidity against the differential pressure for each conductor, and a separate flexible tube of dielectric material completely covering each conductor and bonded and sealed to said rigid dielectric materials at each end of each conductor and to each conductor therebetween.
Claim 2
Dependent Claim
105 words
An electrical feed-through assembly comprising: a hollow tubular casing having means on the periphery for restraining and sealing said casing in a high differential pressure environment, a plurality of separate electrical conductors electrically insulated from each other and mechanically supported within the length of said hollow casing, separate rigid dielectric materials bonded to the end portions of each conductor for providing electrical insulation and mechanical rigidity against the differential pressure for each conductor, and a separate flexible tube of dielectric material completely covering each conductor and bonded and sealed to said rigid dielectric materials at each end of each conductor and to each conductor therebetween.
Claim 3
Dependent Claim
33 words
An electrical feed-through assembly according to claim 1 in which each flexible tube comprises a tube of polyolefin that is heat shrunk and bonded to its associated conductor and said rigid dielectric materials.
Claim 4
Dependent Claim
100 words
An electrical feed-through assembly according to claim 1 in which said conductors are insulated and supported in said casing by a deformable dielectric bonding material holding said conductors within said casing in the area of the high pressure end whereby pressure will deform said material to improve the seal between said conductors and said casing, and a substantially non-deformable dielectric bonding material located adjacent said deformable material and extending within said casing to the area of the low pressure end for fixedly holding said conductors within said casing whereby the conductors will withstand both high voltage and high pressure differentials.
Claim 5
Dependent Claim
38 words
An electrical feed-through assembly according to claim 3 in which said deformable dielectric bonding material is neoprene rubber bonded and vulcanized in place and said non-deformable dielectric bonding material is epoxy that is set and cured in place.
Claim 6
Dependent Claim
28 words
An electrical feed-through assembly according to claim 3 in which said deformable dielectric bonding material is placed adjacent the high pressure end of said high differential pressure environment.
Claim 7
Dependent Claim
56 words
An electrical feed-through assembly according to claim 3 in which said deformable dielectric bonding material extends substantially one-eighth of the total length of the casing measured from the high pressure end and said non-deformable dielectric material extends adjacent said deformable material for the remaining seven-eighths of the total length and measured towards the low pressure end.
Claim 8
Dependent Claim
136 words
An electrical feed-through assembly comprising: a hollow tubular casing having means on the periphery for restraining and sealing said casing between a high and low pressure environment, a plurality of separate electrical conductors electrically insulated and supported within the length of said hollow casing, dielectric materials completely covering and bonded to each conductor, a separate deformable dielectric bonding material adjacent the high pressure end for sealing and insulating said conductors within said casing whereby pressure will deform said material to improve the seal between said conductors and said casing, and a substantially non-deformable dielectric bonding material located adjacent said deformable material and extending within said casing to the area of the low pressure end for fixedly supporting and insulating said conductors in said casing whereby the conductors will withstand both high voltage and high pressure differentials.
Claim 9
Dependent Claim
136 words
An electrical feed-through assembly comprising: a hollow tubular casing having means on the periphery for restraining and sealing said casing between a high and low pressure environment, a plurality of separate electrical conductors electrically insulated and supported within the length of said hollow casing, dielectric materials completely covering and bonded to each conductor, a separate deformable dielectric bonding material adjacent the high pressure end for sealing and insulating said conductors within said casing whereby pressure will deform said material to improve the seal between said conductors and said casing, and a substantially non-deformable dielectric bonding material located adjacent said deformable material and extending within said casing to the area of the low pressure end for fixedly supporting and insulating said conductors in said casing whereby the conductors will withstand both high voltage and high pressure differentials.
Claim 10
Dependent Claim
163 words
An electrical feed-through assembly comprising: a hollow tubular casing having means on the periphery for restraining and sealing said casing in a high differential pressure environment, a plurality of separate electrical conductors electrically insulated and supported within the length of said hollow casing, dielectric materials completely covering and bonded to each conductor, said dielectric materials and conductors having different internal and external diameters to form increased bonding areas to withstand high pressure differentials and a sinuous tortuous path to withstand high voltage differences, a deformable dielectric bonding material holding said conductors within said casing in the area of the higher pressure end whereby pressure will deform said material to improve the seal between said conductors and said casing, and a substantially non-deformable dielectric bonding material located adjacent said deformable material and extending within said casing to the area of the low pressure end for fixedly holding said conductors within said casing whereby the conductors will withstand both high voltage and high pressure differentials.
Claim 11
Dependent Claim
163 words
An electrical feed-through assembly comprising: a hollow tubular casing having means on the periphery for restraining and sealing said casing in a high differential pressure environment, a plurality of separate electrical conductors electrically insulated and supported within the length of said hollow casing, dielectric materials completely covering and bonded to each conductor, said dielectric materials and conductors having different internal and external diameters to form increased bonding areas to withstand high pressure differentials and a sinuous tortuous path to withstand high voltage differences, a deformable dielectric bonding material holding said conductors within said casing in the area of the higher pressure end whereby pressure will deform said material to improve the seal between said conductors and said casing, and a substantially non-deformable dielectric bonding material located adjacent said deformable material and extending within said casing to the area of the low pressure end for fixedly holding said conductors within said casing whereby the conductors will withstand both high voltage and high pressure differentials.
Claim 12
Independent Claim
203 words
The method of constructing a feed-through assembly having a plurality of conductors located within a casing and capable of withstanding high voltage and high pressure differentials comprising the steps of: first epoxy a fiberglass dielectric insert to each end of the conductors, then cover portions of each insert with a tube of polyolefin dielectric that is shrunk in place over the conductor and the inserts, locate a filling hole in the side of the casing close to the high pressure end, then locate and hold the individual conductors within the casing, then holding the casing in a vertical position with the high pressure end down charge the casing with a first small amount of epoxy and heat cure, then charge the casing with a second amount of epoxy larger than the first and heat cure, then charge the casing with a third amount of epoxy to a point below the filling hole and heat cure, then place the casing on its side with the filling hole vertical and heat, then insert neoprene heated within the filling hole until the casing is full, then heat the casing again until the neoprene is vulcanized, and then insert a plug into the filling hole and seal.
Claim 13
Independent Claim
203 words
The method of constructing a feed-through assembly having a plurality of conductors located within a casing and capable of withstanding high voltage and high pressure differentials comprising the steps of: first epoxy a fiberglass dielectric insert to each end of the conductors, then cover portions of each insert with a tube of polyolefin dielectric that is shrunk in place over the conductor and the inserts, locate a filling hole in the side of the casing close to the high pressure end, then locate and hold the individual conductors within the casing, then holding the casing in a vertical position with the high pressure end down charge the casing with a first small amount of epoxy and heat cure, then charge the casing with a second amount of epoxy larger than the first and heat cure, then charge the casing with a third amount of epoxy to a point below the filling hole and heat cure, then place the casing on its side with the filling hole vertical and heat, then insert neoprene heated within the filling hole until the casing is full, then heat the casing again until the neoprene is vulcanized, and then insert a plug into the filling hole and seal.
Claim 14
Dependent Claim
30 words
The method of constructing a feed-through assembly according to claim 9 comprising curing the epoxy at a temperature of approximately 160° F. for a time of three to four hours.
Claim 15
Dependent Claim
25 words
The method of constructing a feed-through assembly according to claim 9 comprising heating the casing to approximately 275° F. prior to inserting the neoprene rubber.
Claim 16
Dependent Claim
37 words
The method of constructing a feed-through assembly according to claim 9 comprising heating the completed casing with neoprene rubber inserted to a temperature of between 325° and 350° F. for approximately 45 minutes to vulcanize the neoprene.
Claim 17
Dependent Claim
61 words
The method of constructing a feed-through assembly according to claim 9 comprising the step of placing the conductors with the fiberglass inserts and the polyolefin tubes located over the inserts and the conductors in an oven for approximately ten minutes at 180° to 200° F. to heat shrink the polyolefin tubes along their complete length to the inserts and the conductors.
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) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |