US4956903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing an insulating bushing free from any risk of explosion
Assignee: Anmyne Dite Ste
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Filing: 1989-03-15
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Granted: 1990-09-18
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Expires: 2009-03-15
Abstract
Abstract A method of producing a ceramic insulating bushing to be filed with dielectric gas under pressure and which is free from any risk of explosion, comprising the following operations: (1) manufacturing a ceramic bushing (10) having an inside surface which is conical over the entire length (L1) of the bushing; (2) making a conical sleeve (30) of strong insulating material, the sleeve having the same cone angle as the inside surface of the bushing and having a length (L2) which exceeds that of the bushing; (3) inserting the sleeve (30) into the bushing until it makes contact with the entire inside surface (20) of the bushing (10); and (4) cutting off the sleeve at the ends of the busing.
Inventors
- 👤 Edmond Thuries
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:17
CPC Classifications
H; H01; H01B; H01B17/00; H01B17/26; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49227; Y10T29/49826; Y10T29/49861
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
114 words
A method of producing a ceramic insulating bushing to be filled with dielectric gas under pressure and which is free from any risk of explosion, said method comprising the following operations: (1) manufacturing a ceramic bushing having an inside surface which is conical over the entire length of the bushing; (2) making a conical sleeve of strong insulating material, said sleeve having the same cone angle as the inside surface of the bushing and having a length which exceeds that of the bushing; (3) inserting the sleeve into the bushing until it makes contact with the entire inside surface of the bushing; and (4) cutting off the sleeve at the ends of the bushing.
Claim 2
Independent Claim
114 words
A method of producing a ceramic insulating bushing to be filled with dielectric gas under pressure and which is free from any risk of explosion, said method comprising the following operations: (1) manufacturing a ceramic bushing having an inside surface which is conical over the entire length of the bushing; (2) making a conical sleeve of strong insulating material, said sleeve having the same cone angle as the inside surface of the bushing and having a length which exceeds that of the bushing; (3) inserting the sleeve into the bushing until it makes contact with the entire inside surface of the bushing; and (4) cutting off the sleeve at the ends of the bushing.
Claim 3
Dependent Claim
37 words
The method according to claim 1; including the step of coating at least one of the outside surface of the sleeve and the inside surface of the bushing with adhesive prior to the sleeve contacting the bushing.
Claim 4
Dependent Claim
27 words
The method according to claim 2, further comprising the step, prior to inserting the sleeve into the bushing, of piercing said sleeve with a plurality of holes.
Claim 5
Independent Claim
27 words
The method according to clain 1, further comprising the step, prior to inserting the sleeve into the bushing, of piercing said sleeve with a plurality of holes.
Claim 6
Independent Claim
27 words
The method according to clain 1, further comprising the step, prior to inserting the sleeve into the bushing, of piercing said sleeve with a plurality of holes.
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) | 1993-09-17 | 1994-03-19 | 1994-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-17 | 1998-03-19 | 1998-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-17 | 2002-03-19 | 2002-09-18 | $7700.00 | Window Closed / Lapsed |