US4888544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery charger
Assignee: Motorola Solutions Inc
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Filing: 1988-01-04
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Granted: 1989-12-19
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Expires: 2008-01-04
Abstract
Abstract A battery charger includes a first charger for providing a first battery charging current and a second charger for providing a second battery charging current. A switch is provided for manually actuating the second charger. A timer times the second charger cycle. The timer is used to initiate the discontinuation of operation of the second charger. When the second charger is operating, the timer is inhibited from being reset. When the first charger discontinues supplying a charging current, the battery charger is conditioned to again permit actuation of the switch to reset the timer and allow operation of the second charger.
Inventors
- 👤 Brian K. Terry
- 👤 Steven D. Hall
- 👤 Robert J. McDermott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:56
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/90; H02J7/92; Y; Y10; Y10S; Y10S320/00; Y10S320/18; Y10S320/19
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
169 words
A battery charger comprising: a first charging means constituting a current source for providing a substantially constant trickle battery charging current, a second charging means constituting at least one current source for providing an additional battery charging current, a charging control means including manually actuable means for selectively actuating the second charging means for providing said additional battery charging current, whereby the first and second charging means cooperatively provide a quick charging current, a timer means actuatable by said charging control means for timing the operation of the second battery charging means, a charge complete means responsive to said timer means for actuating the charging control means to discontinue operation of said second charging means, and for inhibiting said charging control means from resetting said timer means when said second charging means is operating, and a reset means connected to the charging control means and responsive to discontinuation of charging by said first charging means for conditioning the charging control means for permitting actuation of the second charging means.
Claim 2
Dependent Claim
169 words
A battery charger comprising: a first charging means constituting a current source for providing a substantially constant trickle battery charging current, a second charging means constituting at least one current source for providing an additional battery charging current, a charging control means including manually actuable means for selectively actuating the second charging means for providing said additional battery charging current, whereby the first and second charging means cooperatively provide a quick charging current, a timer means actuatable by said charging control means for timing the operation of the second battery charging means, a charge complete means responsive to said timer means for actuating the charging control means to discontinue operation of said second charging means, and for inhibiting said charging control means from resetting said timer means when said second charging means is operating, and a reset means connected to the charging control means and responsive to discontinuation of charging by said first charging means for conditioning the charging control means for permitting actuation of the second charging means.
Claim 3
Dependent Claim
82 words
A battery charger as defined in claim 1, in which: a first indicator means is responsive to the first charging means for indicating when said first charging means is providing said trickle charging current, a second indicator means is responsive to the second charging means for indicating when said second charging means is providing said additional charging current, and a third indicator means is responsive to the charge complete means for indicating that the operation of said second charging means is completed.
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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) | 1992-12-18 | 1993-06-19 | 1993-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-18 | 1997-06-19 | 1997-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-18 | 2001-06-19 | 2001-12-19 | $7700.00 | Window Closed / Lapsed |