US3597663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic capacitor having a poured elastomer o-ring seal
Assignee: Sprague Electric Co
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Filing: 1969-12-17
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Granted: 1971-08-03
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Expires: 1989-12-17
Abstract
Abstract An electrolytic capacitor seal is formed by pouring a liquid polymerizable elastomer either on a channel at the outer edge of a capacitor cover or on a ridge formed on the inner diameter of the capacitor case and curing the elastomer so that it becomes heat resistant and resilient and in effect producing a gasket in situ upon either the cover or the capacitor case.
Inventors
- 👤 Mark Markarian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:31
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/08; H01G9/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
83 words
The sealed capacitor case of claim 1 wherein: said cover contains a circumferential channel molded on one side of said cover substantially near the outer edge of said cover; said poured elastomer O-ring gasket substantially fills and protrudes from said channel; and the outer edge at the open end of said capacitor case being rolled over into intimate contact with that part of said elastomer gasket that protrudes from said channel thereby forming said seal in the open end of said capacitor case.
Claim 2
Dependent Claim
62 words
The sealed capacitor case of claim 1 wherein: said case has a circumferential ridge along its inner diameter; and said poured elastomer O-ring gasket overlays said ridge and is in intimate contact with the surface area around the outside edge of said cover which is firmly pressed against said gasket thereby forming said seal in the open end of said capacitor case.
Claim 3
Dependent Claim
45 words
The sealed capacitor case of claim 3 wherein the outside edge at the open end of said case is rolled over into intimate contact with outside surface of said cover presses the inside surface area around the edge of said cover firmly against said gasket.
Claim 4
Dependent Claim
11 words
The gasket of claim 1 wherein said elastomer is natural rubber.
Claim 5
Dependent Claim
11 words
The gasket of claim 1 wherein said elastomer is synthetic rubber.
Claim 6
Dependent Claim
39 words
The gasket of claim 6 wherein said elastomer is selected from the group consisting of acrylic rubber, butyl rubber, butadiene rubber, depolymerized rubber, ethylene-propylene rubber, nitrile rubber, isoprene rubber, sulfide rubber, styrene butadiene rubber, silicone rubber and urethane rubber.
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |