US3769479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Puffer-type compressed-gas circuit interrupter with double-flow action
Assignee: ABB Inc USA
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Filing: 1972-04-28
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Granted: 1973-10-30
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Expires: 1992-04-28
Abstract
Abstract A puffer-type compressed-gas circuit interrupter is provided having a movable cylinder movable with the movable contact structure, and being provided with a hollow contact follower disposed within the moving contact structure. The hollow contact follower has a lost-motion connection with the movable contact structure, and maintains abutment and a blocking of the gas flow with the hollow stationary contact until a predetermined time, thereby blocking the venting action, and permitting a precompression of the gas. Further opening motion of the movable cylinder and the movable contact structure pulls the hollow contact follower away from the hollow stationary contact, and provides a double-flow venting action through both the stationary hollow contact and also the moving hollow contact.
Inventors
- 👤 W Leeds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:45
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/70; H01H33/88; H01H33/90; H01H33/91
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
120 words
A circuit interrupter of the fluid-blast type, including separable-contact means comprising a relatively stationary hollow tubular venting contact and a cooperable hollow movable contact structure (16), a movable operating cylinder affixed to said movable contact Structure (16), means defining a relatively stationary piston, said movable piston cylinder sliding over said relatively stationary piston to compress gas within the movable operating cylinder, an orifice structure carried by the movable operating cylinder and having an orifice opening closely encircling said stationary hollow contact, and a movable follower-contact structure movable with the movable contact structure and having a lost-motion connection with the movable operating cylinder to provide a valve action and thereby temporarily prevent the exhausting of gas through the separable contact structure.
Claim 2
Dependent Claim
120 words
A circuit interrupter of the fluid-blast type, including separable-contact means comprising a relatively stationary hollow tubular venting contact and a cooperable hollow movable contact structure (16), a movable operating cylinder affixed to said movable contact Structure (16), means defining a relatively stationary piston, said movable piston cylinder sliding over said relatively stationary piston to compress gas within the movable operating cylinder, an orifice structure carried by the movable operating cylinder and having an orifice opening closely encircling said stationary hollow contact, and a movable follower-contact structure movable with the movable contact structure and having a lost-motion connection with the movable operating cylinder to provide a valve action and thereby temporarily prevent the exhausting of gas through the separable contact structure.
Claim 3
Dependent Claim
12 words
The combination according to claim 1, wherein the movable follower-contact is hollow.
Claim 4
Dependent Claim
27 words
The combination according to claim 2, wherein the movable follower has an arc-catcher rod protruding through the opening thereof in the closed-circuit position of the circuit interrupter.
Claim 5
Dependent Claim
27 words
The combination of claim 1, wherein biasing means are provided to bias the hollow contact-follower against the relatively stationary contact in the closed position of the interrupter.
Claim 6
Dependent Claim
23 words
The combination according to claim 1, wherein the movable contact structure (16) is hollow, and vents to the interior of a surrounding casing.
Claim 7
Dependent Claim
34 words
The combination according to claim 1, wherein an upstanding casing structure is provided, said casing structure having a lower-disposed contact-support plate, and said stationary fixed piston is supported upwardly from said stationary plate structure.
Claim 8
Dependent Claim
95 words
A high-voltage pumped-gas circuit interrupter comprising a pair of upstanding insulating casings having an interposed contact-support plate provided therebetween, line-terminal means provided at said contact support plate, an upstanding fixed piston rigidly secured to said control-support plate, a movable operating cylinder carrying a hollow movable contact structure sliding over said fixed piston, and relatively stationary hollow contact structure cooperating with said movable contact structure to establish an arc, and a concentrically-arranged interiorly-disposed contact follower of tubular configuration movable with the movable contact structure, and having a lost-motion connection with respect to said movable contact structure.
Claim 9
Dependent Claim
95 words
A high-voltage pumped-gas circuit interrupter comprising a pair of upstanding insulating casings having an interposed contact-support plate provided therebetween, line-terminal means provided at said contact support plate, an upstanding fixed piston rigidly secured to said control-support plate, a movable operating cylinder carrying a hollow movable contact structure sliding over said fixed piston, and relatively stationary hollow contact structure cooperating with said movable contact structure to establish an arc, and a concentrically-arranged interiorly-disposed contact follower of tubular configuration movable with the movable contact structure, and having a lost-motion connection with respect to said movable contact structure.
Claim 10
Dependent Claim
35 words
The combination according to claim 7, wherein an arc-catcher rod is fixedly secured to said movable operating cylinder and extends in the closed position of the breaker through the orifice associated with the movable contact-follower.
Claim 11
Dependent Claim
44 words
The combination of claim 8, wherein the tip of the said arc-catcher rod being placed in a position below the orifice in the hollow movable contact follower after a predetermined displacement of the said follower during the initial part of the contact opening movement.
References Cited (Backward Citations)
US3538282A
Cited
US3527912A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |