Patent US4641078A successfully refreshed from Google Patents.
US4641078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for charging electrical storage batteries
Assignee: RALPH J STOLLE Co
•
Filing: 1984-11-13
•
Granted: 1987-02-03
•
Expires: 2004-11-13
Abstract
Abstract Apparatus and method for charging electrical storage batteries including apparatus providing a charging current of selected value and cyclical wave generator for periodically varying on the charging current as a cyclical wave form having a frequency of 2 to 75 kilohertz, the wave form having an amplitude of at least plus and minus 5% of the value of the charging current.
Inventors
- 👤 Jimmie N. Short
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:48
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/70; H02J7/90; H02J7/927
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
55 words
Method for charging electrical storage battery means including providing a generally linear charging current of selected value, periodically varying the charging current as a cyclical wave form having a frequency of 2 to 75 kilohertz, the wave form having an amplitude of at least plus and minus 5% of the value of the charging current.
Claim 2
Dependent Claim
55 words
Method for charging electrical storage battery means including providing a generally linear charging current of selected value, periodically varying the charging current as a cyclical wave form having a frequency of 2 to 75 kilohertz, the wave form having an amplitude of at least plus and minus 5% of the value of the charging current.
Claim 3
Dependent Claim
17 words
The invention of claim 1 wherein said charging current varies with time as said storage battery charges.
Claim 4
Dependent Claim
18 words
The invention of claim 2 wherein said charging current diminishes with time as said storage battery is charged.
Claim 5
Dependent Claim
25 words
The invention of claim 1 including selectively periodically cycling said charging current at a frequency of 2 to 75 kilohertz for selected periods of time.
Claim 6
Dependent Claim
116 words
Apparatus for charging electrical storage battery means including direct current source means to provide said generally linear charging current; current controller means providing a central signal determine the rate of flow of current to said storage battery; switch means connected in series between said direct current source means and said battery means and having signal input means to receive said control signal whereby said switch means is operated by said controller in response to said current flow rate to said battery to regulate rate of current flow to said battery modulator means to receive said control signal and supply an operating signal to cyclical wave generating means to selectively periodically interrupt said cyclical wave generating means.
Claim 7
Dependent Claim
116 words
Apparatus for charging electrical storage battery means including direct current source means to provide said generally linear charging current; current controller means providing a central signal determine the rate of flow of current to said storage battery; switch means connected in series between said direct current source means and said battery means and having signal input means to receive said control signal whereby said switch means is operated by said controller in response to said current flow rate to said battery to regulate rate of current flow to said battery modulator means to receive said control signal and supply an operating signal to cyclical wave generating means to selectively periodically interrupt said cyclical wave generating means.
Claim 8
Dependent Claim
30 words
The invention of claim 5 wherein said switch means includes current regulating means whereby rate of current flow through said switch means is regulated in response to said control signal.
Claim 9
Dependent Claim
12 words
The invention of claim 6 wherein said switch means includes transistor means.
Claim 10
Dependent Claim
74 words
The invention of claim 6 wherein said cyclical wave generating means are provided in series between said controller and said switch means to periodically vary said charging current flow at 2 to 75 kilohertz whereby the charging circuit applied to said battery varies in a cyclical pattern of 2 to 75 kilohertz in a wave form having an amplitude of at least plus and minus 5% of the linear rate of the charging current.
Claim 11
Dependent Claim
37 words
The invention of claim 8 wherein said controller means includes voltage measuring means to sense the voltage of said storage battery to supply said control signal to regulate the frequency of operation of said wave generating means.
References Cited (Backward Citations)
US4147970A
Cited
US4371826A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-02 | 1990-08-04 | 1991-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-02 | 1994-08-04 | 1995-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-02 | 1998-08-04 | 1999-02-03 | $7700.00 | Window Closed / Lapsed |