US3708348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Topping-up arrangements for multi-cell electric batteries
Assignee: Electric Power Storage Ltd
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Filing: 1970-08-21
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Granted: 1973-01-02
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Expires: 1990-08-21
Abstract
Abstract A topping-up arrangement for multi-cell electric storage battery comprises a vent extending down into each cell to a point below the desired liquid level, and a small filling opening into each cell from a common filling trough, of such size that a meniscus will form. A removable common cover for the trough carries a number of probes, one projecting down through each filling opening the probe being so shaped as to permit air to escape while liquid drains into the cell.
Inventors
- 👤 R Painter
- 👤 G Vaughan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:10
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/60; H01M50/609; H01M50/627; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
151 words
A storage battery having means for topping-up the electrolyte to a desired level, comprising: a number of cells housed within said storage battery; a lid for covering said storage battery and including a vent for each cell open to atmospheric pressure and extending down into the cell to slightly below the desired level of the electrolyte; said lid further including a trough for receiving liquid and extending over the top of said cells; a filling opening extending through said trough into each cell and having a diameter so that a meniscus will form across said opening with liquid in said trough preventing air from escaping from said opening; and a cover for covering said trough and including a probe extending through each said opening and having one or more grooves to permit air to escape as the liquid in said trough drains through said opening with said cover on said lid.
Claim 2
Dependent Claim
151 words
A storage battery having means for topping-up the electrolyte to a desired level, comprising: a number of cells housed within said storage battery; a lid for covering said storage battery and including a vent for each cell open to atmospheric pressure and extending down into the cell to slightly below the desired level of the electrolyte; said lid further including a trough for receiving liquid and extending over the top of said cells; a filling opening extending through said trough into each cell and having a diameter so that a meniscus will form across said opening with liquid in said trough preventing air from escaping from said opening; and a cover for covering said trough and including a probe extending through each said opening and having one or more grooves to permit air to escape as the liquid in said trough drains through said opening with said cover on said lid.
Claim 3
Dependent Claim
24 words
A storage battery as in claim 1 in which said probe comprises a pair of opposed walls for enclosing a volume of liquid therebetween.
Claim 4
Dependent Claim
22 words
A storage battery as in claim 1 in which the diameter of each said opening is between 4 mm and 8 mm.
Claim 5
Dependent Claim
21 words
A storage battery as in claim 3 in which the diameter of said opening is between 6 mm and 7.5 mm.
Claim 6
Dependent Claim
27 words
A storage battery as in claim 1 in which said probe is of sufficient length to extend at least 10 mm below the bottom of said opening.
Claim 7
Dependent Claim
26 words
A storage battery as in claim 1 in which the size of said probe relative to said opening is such as to leave a clearance therebetween.
Claim 8
Dependent Claim
17 words
A storage battery as in claim 6 in which said clearance is not less than 1.16 mm.
Claim 9
Dependent Claim
17 words
A storage battery as in claim 1 in which the lower end of said probe is pointed.
Claim 10
Dependent Claim
14 words
A storage battery as in claim 1 wherein said probe has a ''''Y'''' cross-section.
Claim 11
Dependent Claim
14 words
A storage battery as in claim 1 wherein said probe has a ''''T'''' cross-section.
Claim 12
Dependent Claim
14 words
A storage battery as in claim 1 wherein said probe has a ''''U'''' cross-section.
Claim 13
Dependent Claim
14 words
A storage battery as in claim 1 wherein said probe has a ''''C'''' cross-section.
Claim 14
Dependent Claim
14 words
A storage battery as in claim 1 wherein said probe has a cruciform cross-section.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |