US3920307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arc-out shut off valve assembly for a high voltage bushing
Assignee: Cooper Power Acquisition Corp
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Filing: 1974-08-21
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Granted: 1975-11-18
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Expires: 1994-08-21
Abstract
Abstract A high voltage cable termination bushing for terminating a high voltage cable and including a housing having an axial passage, an electrically conductive receptacle within the passage and supported intermediate the ends thereof, the passage being closed at the inner end, and a gas trap valve provided between the inner end of the passage and the receptacle, the valve being biased into engagement with the receptacle that traps gases within the passage. The gas trap valve is opened by the arc-extinguishing rod provided on the conductive probe of the cable connector and having a length sufficient to allow the valve to close at the anticipated position of the probe, with respect to the receptacle where the arc will be extinguished.
Inventors
- 👤 Clarence B Burns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:45
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/46; H01R13/53
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
165 words
A high voltage cable termination bushing for connecting an electrical apparatus to an electrically conductive probe having an arc extinguishing rod on the end, said bushing comprising: a housing formed from an insulating material and having a passage, said housing being adapted to be mounted in the entrance to a housing for an electrical apparatus, an electrically conductive member supported within said passage intermediate the ends thereof, electrically conductive means closing one end of said passage, said conductive means being electrically connected to said conductive member for connecting said bushing to the apparatus within the housing, valve means positioned within said passage between said conductive member and said conductive means for trapping gases between said member and said conductive means, said valve means being normally in a closed position and opened by the arc extinguishing rod on the end of the probe on cable termination, on withdrawal of the probe the valve means will close to prevent the escape of gases trapped in the passage.
Claim 2
Dependent Claim
165 words
A high voltage cable termination bushing for connecting an electrical apparatus to an electrically conductive probe having an arc extinguishing rod on the end, said bushing comprising: a housing formed from an insulating material and having a passage, said housing being adapted to be mounted in the entrance to a housing for an electrical apparatus, an electrically conductive member supported within said passage intermediate the ends thereof, electrically conductive means closing one end of said passage, said conductive means being electrically connected to said conductive member for connecting said bushing to the apparatus within the housing, valve means positioned within said passage between said conductive member and said conductive means for trapping gases between said member and said conductive means, said valve means being normally in a closed position and opened by the arc extinguishing rod on the end of the probe on cable termination, on withdrawal of the probe the valve means will close to prevent the escape of gases trapped in the passage.
Claim 3
Dependent Claim
33 words
The bushing according to claim 1 wherein said valve means includes a valve member and a spring positioned to bias said valve member into engagement with said conductive member to close the passage.
Claim 4
Dependent Claim
40 words
The bushing according to claim 2 wherein said valve member includes an extension positioned to engage the rod, said extension and rod having a combined length established by the voltage rating for the bushing to close the passage at arc-out.
Claim 5
Dependent Claim
31 words
The bushing according to claim 1 including an arc extinguishing sleeve positioned at the open end of said passage and an O-ring seal in the sleeve to sealingly engage the probe.
Claim 6
Dependent Claim
152 words
The combination of an electrical connector having an electrically conductive probe and an arc extinguishing rod on the end of said probe and a high voltage cable termination bushing having a housing formed from an insulating material and a passage extending through the length of the housing, said passage being closed at one end, an electrically conductive receptacle mounted in said passage intermediate to the ends thereof and being adapted to be electrically connected to an electrical apparatus, said receptacle including a valve seat at the inner end, valve means positioned within said passage between the receptacle and said closed end of said passage for movement into engagement with said valve seat to trap gases within said passage, said rod having a length sufficient to provide for the extinction of the arc produced on withdrawal of the probe from the receptacle and to substantially simultaneously close said valve means at arc out.
Claim 7
Dependent Claim
152 words
The combination of an electrical connector having an electrically conductive probe and an arc extinguishing rod on the end of said probe and a high voltage cable termination bushing having a housing formed from an insulating material and a passage extending through the length of the housing, said passage being closed at one end, an electrically conductive receptacle mounted in said passage intermediate to the ends thereof and being adapted to be electrically connected to an electrical apparatus, said receptacle including a valve seat at the inner end, valve means positioned within said passage between the receptacle and said closed end of said passage for movement into engagement with said valve seat to trap gases within said passage, said rod having a length sufficient to provide for the extinction of the arc produced on withdrawal of the probe from the receptacle and to substantially simultaneously close said valve means at arc out.
Claim 8
Dependent Claim
36 words
The combination according to claim 5 wherein said valve means includes a valve member positioned for movement into engagement with said valve seat and a spring biasing said valve member into engagement with said valve seat.
Claim 9
Dependent Claim
22 words
The combination according to claim 5 including means at the other end of said passage for sealingly engaging said probe and rod.
Claim 10
Dependent Claim
18 words
The combination according to claim 5 including means on said valve member for delaying closing of the passage.
Claim 11
Dependent Claim
167 words
A high voltage cable termination bushing for connecting an electrical apparatus to an electrically conductive probe having an arc extinguishing rod on the end, said bushing comprising: a housing formed from a dielectric insulating material and adapted to be mounted in the opening of an enclosure for an electrical apparatus, a passage in said housing, a hollow cylindrical electrically conductive tube in said passage, a conductive plug closing one end of said tube and being adapted to be connected to an electrical device apparatus within the enclosure, an electrically conductive receptacle supported in said tube intermediate the ends of said housing, normally closed valve means mounted in said tube for movement into engagement with said receptacle to define a gas trap chamber in said tube, said valve means being opened by the rod on said probe on cable termination, the rod being of sufficient length to allow the valve means to close on withdrawal of the probe from the receptacle a sufficient distance to extinguish the arc.
Claim 12
Dependent Claim
167 words
A high voltage cable termination bushing for connecting an electrical apparatus to an electrically conductive probe having an arc extinguishing rod on the end, said bushing comprising: a housing formed from a dielectric insulating material and adapted to be mounted in the opening of an enclosure for an electrical apparatus, a passage in said housing, a hollow cylindrical electrically conductive tube in said passage, a conductive plug closing one end of said tube and being adapted to be connected to an electrical device apparatus within the enclosure, an electrically conductive receptacle supported in said tube intermediate the ends of said housing, normally closed valve means mounted in said tube for movement into engagement with said receptacle to define a gas trap chamber in said tube, said valve means being opened by the rod on said probe on cable termination, the rod being of sufficient length to allow the valve means to close on withdrawal of the probe from the receptacle a sufficient distance to extinguish the arc.
Claim 13
Dependent Claim
33 words
The bushing according to claim 9 including an arc extinguishing sleeve supported at the entrance to said tube and means at the entrance to said sleeve for sealingly engaging said probe and rod.
Claim 14
Dependent Claim
30 words
The bushing according to claim 9 wherein said valve means includes a valve element and a spring positioned in said tube to bias said element into engagement with said receptacle.
Claim 15
Dependent Claim
25 words
The bushing according to claim 1 wherein said valve means includes means for delaying the closing of said valve means to correspond with arc out.
References Cited (Backward Citations)
US3384861A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |