Patent US3812280A successfully refreshed from Google Patents.
US3812280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical capacitors with vented closures
Assignee: Siemens AG
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Filing: 1973-04-24
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Granted: 1974-05-21
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Expires: 1993-04-24
Abstract
Abstract An electrical capacitor having a sealed housing and a number of pressure relief orifices formed in the housing. A resilient annular valve disc overlies the orifices and a rigid washer like member holds the resilient disc in place against the housing. The rigid member has a number of recesses located in the vicinity of respective orifices to permit the resilient member to be lifted to vent pressure developed inside the capacitor.
Inventors
- 👤 A Deckert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:36
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/08; H01G9/12; Y; Y10; Y10S; Y10S220/00; Y10S220/27
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
96 words
In an electrical capacitor, a housing having a valve orifice for communicating pressure from inside the capacitor to the ambient pressure, a relatively resilient member in contact with the housing and overlying the orifice for normally sealing the inside of the capacitor from the ambient atmosphere, a relatively rigid member overlying said resilient member and normally holding the same into sealing engagement with said housing, said rigid member having a peripheral recess in the vicinity of said orifice to permit said resilient member to be lifted by a predetermined pressure at the inside of said capacitor.
Claim 2
Dependent Claim
96 words
In an electrical capacitor, a housing having a valve orifice for communicating pressure from inside the capacitor to the ambient pressure, a relatively resilient member in contact with the housing and overlying the orifice for normally sealing the inside of the capacitor from the ambient atmosphere, a relatively rigid member overlying said resilient member and normally holding the same into sealing engagement with said housing, said rigid member having a peripheral recess in the vicinity of said orifice to permit said resilient member to be lifted by a predetermined pressure at the inside of said capacitor.
Claim 3
Dependent Claim
36 words
A capacitor in accordance with claim 1 wherein said resilient and rigid members are substantially annular in shape and wherein said orifice is located inside the largest circle defined by the periphery of said rigid member.
Claim 4
Dependent Claim
18 words
A capacitor in accordance with claim 2 wherein said recess comprises a chordal section of said annular member.
Claim 5
Dependent Claim
21 words
A capacitor in accordance with claim 2 wherein said recess comprises a notch formed at the periphery of said annular member.
Claim 6
Dependent Claim
38 words
A capacitor in accordance with claim 4 wherein a plurality of said notches are formed around the periphery of said rigid annular member and wherein an orifice is provided substantially at the location of each of said orifices.
Claim 7
Dependent Claim
64 words
A capacitor having a sealed housing, a valve opening in the housing, a resilient valve head closing the opening, a relatively rigid member holding the resilient member closed against the opening and said rigid member having a cutaway portion in the vicinity of the orifice to permit the valve head to be lifted by a predetermined amount of pressure developed interiorly of the capacitor.
Claim 8
Dependent Claim
64 words
A capacitor having a sealed housing, a valve opening in the housing, a resilient valve head closing the opening, a relatively rigid member holding the resilient member closed against the opening and said rigid member having a cutaway portion in the vicinity of the orifice to permit the valve head to be lifted by a predetermined amount of pressure developed interiorly of the capacitor.
Claim 9
Dependent Claim
47 words
A capacitor in accordance with claim 6 wherein said valve head has a planar disc portion and said rigid member overlies said planar disc portion and holds the outer periphery thereof in firm contact with said housing at all locations except in the vicinity of said orifice.
Claim 10
Dependent Claim
26 words
A capacitor in accordance with claim 7 wherein said valve head has a planar disc portion and an upstanding rim formed at the outer periphery thereof.
Claim 11
Dependent Claim
28 words
A capacitor in accordance with claim 7 wherein said rigid member is an annular disc and wherein centering pips are provided adjacent an inner periphery of said disc.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |