Patent US5969435A successfully refreshed from Google Patents.
US5969435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modular DC cogenerator systems
Assignee: Nextek Power Systems Inc
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Filing: 1997-03-19
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Granted: 1999-10-19
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Expires: 2017-03-19
Abstract
Abstract A DC power system receives AC electrical power and DC electrical power from separate first and second sources simultaneously. The DC power system delivers DC electrical power to an output for use by a load requiring DC power. The DC power system includes a converter to convert AC electrical power to DC electrical power and a power sharing control device to control and distribute the DC electrical power to an output. The first source of DC electrical power includes a storage battery, which provides standby DC electrical power to the DC power system. It also includes a power sharing device, which maintains the storage battery fully charged for use at peak loads, when the DC output electrical power is insufficient to meet the DC load. The second source of DC electrical power is a cogenerator such as a fuel cell, a thermo photovoltaic generator or an internal combustion engine and an alternator for generating and delivering DC electrical power to the power sharing device, while producing and delivering waste heat for use of an external load requiring this heat.
Inventors
- 👤 William George Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:37
CPC Classifications
H; H02; H02J; H02J1/00; H02J1/10; H02J1/06; H02J9/00; H02J9/04; H02J9/06; H02J9/061; Y; Y02; Y02B; Y02B10/00; Y02B10/70; Y02B90/00; Y02B90/10; Y02E; Y02E10/00; Y02E10/50; Y02E10/56; Y02E20/00; Y02E20/14
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
166 words
A power sharing modular DC cogeneration system comprising: DC power system means capable of receiving AC electrical power and DC electrical power from first and second sources simultaneously and delivering DC electrical power to an output for use by a load requiring DC power; said DC power system means comprising both means for converting said AC electrical power to DC electrical power and power sharing means for controlling and distributing said DC electrical power to said output; the first source of DC electrical power comprising storage battery means for providing standby DC electrical power to said DC power system means, said power sharing means maintaining said storage battery fully charged for use at peak loads when the DC output electrical power is insufficient to meet the DC load; and the second source of DC electrical power being cogeneration means for generating and delivering DC electrical power to said power sharing means while producing and delivering waste heat for use of an external load requiring said heat.
Claim 2
Dependent Claim
166 words
A power sharing modular DC cogeneration system comprising: DC power system means capable of receiving AC electrical power and DC electrical power from first and second sources simultaneously and delivering DC electrical power to an output for use by a load requiring DC power; said DC power system means comprising both means for converting said AC electrical power to DC electrical power and power sharing means for controlling and distributing said DC electrical power to said output; the first source of DC electrical power comprising storage battery means for providing standby DC electrical power to said DC power system means, said power sharing means maintaining said storage battery fully charged for use at peak loads when the DC output electrical power is insufficient to meet the DC load; and the second source of DC electrical power being cogeneration means for generating and delivering DC electrical power to said power sharing means while producing and delivering waste heat for use of an external load requiring said heat.
Claim 3
Dependent Claim
22 words
The power sharing modular DC cogeneration system of claim 1 in which said cogeneration means comprises a combustion engine and an alternator.
Claim 4
Dependent Claim
19 words
The power sharing modular DC cogeneration system of claim 1 in which said cogeneration means comprises a fuel cell.
Claim 5
Dependent Claim
20 words
The power sharing modular DC cogeneration system of claim 1 in which said cogeneration means comprises a thermo photovoltaic generator.
Claim 6
Dependent Claim
184 words
An emergency power system comprising: DC electrical control means for receiving, singly and together, a source of AC electrical power and least one low voltage DC power source; said DC electrical control means capable of receiving DC electrical power from first and second sources simultaneously and delivering DC electrical power to an output for use by a load requiring DC power; said DC power system means converting said AC electrical power to DC electrical power and controlling and distributing said DC electrical power to said output; said first source of DC electrical power comprising storage battery means for providing standby DC electrical power to said DC power system means, said DC power system maintaining said storage battery fully charged for use at peak loads when the DC output electrical power is insufficient to meet the DC load; and said second source of DC electrical power being cogeneration means for generating and delivering DC electrical power to said DC power system when there is an AC power outage, said cogeneration means producing and delivering waste heat for use of an external load requiring said heat.
Claim 7
Dependent Claim
184 words
An emergency power system comprising: DC electrical control means for receiving, singly and together, a source of AC electrical power and least one low voltage DC power source; said DC electrical control means capable of receiving DC electrical power from first and second sources simultaneously and delivering DC electrical power to an output for use by a load requiring DC power; said DC power system means converting said AC electrical power to DC electrical power and controlling and distributing said DC electrical power to said output; said first source of DC electrical power comprising storage battery means for providing standby DC electrical power to said DC power system means, said DC power system maintaining said storage battery fully charged for use at peak loads when the DC output electrical power is insufficient to meet the DC load; and said second source of DC electrical power being cogeneration means for generating and delivering DC electrical power to said DC power system when there is an AC power outage, said cogeneration means producing and delivering waste heat for use of an external load requiring said heat.
Claim 8
Dependent Claim
49 words
The emergency power system of claim 5 in which said cogeneration means remains inoperative on a standby basis and includes means for automatically being started when any AC power outage lasts past a predetermined time or if the charge in said battery means should drop below a predetermined level.
Claim 9
Dependent Claim
17 words
The emergency power system of claim 6 in which said cogeneration means comprises an internal combustion engine.
Claim 10
Dependent Claim
78 words
A power sharing modular low voltage DC cogeneration system comprising: a DC subsystem device responsive to receiving, singly and together, a source of AC power and at least one low voltage DC power source; said DC subsystem device comprising multiple functions for converting said AC electrical power into low voltage DC electrical power and combining and sharing said power with one or more external low voltage DC power sources in service to a compatible low voltage DC load.
Claim 11
Dependent Claim
78 words
A power sharing modular low voltage DC cogeneration system comprising: a DC subsystem device responsive to receiving, singly and together, a source of AC power and at least one low voltage DC power source; said DC subsystem device comprising multiple functions for converting said AC electrical power into low voltage DC electrical power and combining and sharing said power with one or more external low voltage DC power sources in service to a compatible low voltage DC load.
Claim 12
Dependent Claim
104 words
An emergency power system comprising: DC power system means capable of receiving AC electrical power and converting said AC electrical power to supply power to charge, and keep charged, a low voltage storage battery; said DC power system means also capable of receiving DC power from a DC generator means; said DC power system means supplying DC power to an inverter which supplies connected AC loads during an AC power outage; and, said DC generator means being sized to supply only average AC loads with a small margin to keep said storage battery charged, wherein peak AC loads are supplied by said storage battery.
Claim 13
Dependent Claim
104 words
An emergency power system comprising: DC power system means capable of receiving AC electrical power and converting said AC electrical power to supply power to charge, and keep charged, a low voltage storage battery; said DC power system means also capable of receiving DC power from a DC generator means; said DC power system means supplying DC power to an inverter which supplies connected AC loads during an AC power outage; and, said DC generator means being sized to supply only average AC loads with a small margin to keep said storage battery charged, wherein peak AC loads are supplied by said storage battery.
Claim 14
Dependent Claim
22 words
The power sharing modular DC cogeneration system of claim 9 in which said cogeneration means comprises a combustion engine and an alternator.
Claim 15
Dependent Claim
19 words
The power sharing modular DC cogeneration system of claim 9 in which said cogeneration means comprises a fuel cell.
Claim 16
Dependent Claim
20 words
The power sharing modular DC cogeneration system of claim 9 in which said cogeneration means comprises a thermo photovoltaic generator.
Claim 17
Dependent Claim
49 words
The emergency power system of claim 9 in which said generation means remains inoperative on a standby basis and includes means for automatically being started when any AC power outage lasts past a predetermined time or if the charge in said battery means should drop below a predetermined level.
Claim 18
Dependent Claim
17 words
The emergency power system of claim 9 in which said generation means comprises an internal combustion engine.
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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) | 2002-10-18 | 2003-04-19 | 2003-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-10-18 | 2007-04-19 | 2007-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-10-18 | 2011-04-19 | 2011-10-19 | $7700.00 | Window Closed / Lapsed |