US3904441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery vent construction
Assignee: Honeywell International Inc
•
Filing: 1973-12-26
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Granted: 1975-09-09
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Expires: 1993-12-26
Abstract
Abstract A novel venting system for a service free storage battery which allows escape of generated gases but not of battery liquid. The system includes a strip of microporous, hydrophobic filter media extending across vent apertures in the battery cover and a rigid guard over said filter strip which permits gas to escape through passages between the guard and cover and which protects the filter strip from external damage.
Inventors
- 👤 John P Badger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:31
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/30; H01M50/394; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
153 words
A VENTING SYSTEM FOR A STORAGE BATTERY COMPRISING, IN COMBINATION, A GENERALLY PLANAR BATTERY COVER HAVING AN ELONGATE CHANNEL EXTENDING ACROSS SAID COVER AND RECESSED BELOW THE PLANE OF SAID COVER, A PLURALITY OF APERTURES EXTENDING THROUGH THE FLOOR OF SAID CHANNEL FOR COMMUNICATION WITH THE CELLS OF SAID BATTERY, AN ELONGATE FLAT STRIP OF MICROPOROUS MATERIAL SUBSTANTIALLY COEXTENSIVE WITH AND EXTENDING OVER AND SEALED TO THE FLOOR OF SAID CHANNEL TO COVER SAID APERTURES, SAID MICROPOROUS STRIP COMPRISED OF A MATERIAL PERMEABLE TO GAS BUT SUBSTANTIALLY IMPERMEABLE TO LIQUID, AND AN ELONGATE RIGID GUARD EXTENDING OVER THE OUTER FACE OF SAID MICROPOROUS STRIP AND BEING SUBSTANTIALLY COEXTENSIVE WITH SAID STRIP, SAID GUARD HAVING SPACED APART PERIPHERAL PORTIONS OF ITS OUTWARDLY SURFACE SEALED TO SAID STRIP SUCH THAT GAS PASSING OUTWARDLY THROUGH SAID APERTURES AND FILTER STRIP MAY PASS TO ATMOSPHERE THROUGH THE PASSAGES BETWEEN SAID SPACED APART PERIPHERAL PORTIONS OF SAID STRIP.
Claim 2
Dependent Claim
153 words
A VENTING SYSTEM FOR A STORAGE BATTERY COMPRISING, IN COMBINATION, A GENERALLY PLANAR BATTERY COVER HAVING AN ELONGATE CHANNEL EXTENDING ACROSS SAID COVER AND RECESSED BELOW THE PLANE OF SAID COVER, A PLURALITY OF APERTURES EXTENDING THROUGH THE FLOOR OF SAID CHANNEL FOR COMMUNICATION WITH THE CELLS OF SAID BATTERY, AN ELONGATE FLAT STRIP OF MICROPOROUS MATERIAL SUBSTANTIALLY COEXTENSIVE WITH AND EXTENDING OVER AND SEALED TO THE FLOOR OF SAID CHANNEL TO COVER SAID APERTURES, SAID MICROPOROUS STRIP COMPRISED OF A MATERIAL PERMEABLE TO GAS BUT SUBSTANTIALLY IMPERMEABLE TO LIQUID, AND AN ELONGATE RIGID GUARD EXTENDING OVER THE OUTER FACE OF SAID MICROPOROUS STRIP AND BEING SUBSTANTIALLY COEXTENSIVE WITH SAID STRIP, SAID GUARD HAVING SPACED APART PERIPHERAL PORTIONS OF ITS OUTWARDLY SURFACE SEALED TO SAID STRIP SUCH THAT GAS PASSING OUTWARDLY THROUGH SAID APERTURES AND FILTER STRIP MAY PASS TO ATMOSPHERE THROUGH THE PASSAGES BETWEEN SAID SPACED APART PERIPHERAL PORTIONS OF SAID STRIP.
Claim 3
Dependent Claim
25 words
The venting system of claim 1 wherein the upper surface of said rigid guard is substantially coplanar with the upper surface of said battery cover.
Claim 4
Dependent Claim
32 words
The venting system of claim 1 wherein the lateral edges of said elongate rigid guard are slightly spaced from the opposed sidewalls of said elongate channel to provide a gas passage therebetween.
References Cited (Backward Citations)
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US3282740A
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US3329531A
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US3466199A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |