US3423560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stored energy electric stud welding apparatus
Assignee: Uniweld Products Inc
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Filing: 1966-04-22
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Granted: 1969-01-21
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Expires: 1986-04-22
Abstract
No abstract record available.
Inventors
- 👤 Ronald F Brennen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:19
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/10; B23K9/1081
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
A LIGHTWEIGHT AND PORTABLE ELECTRIC WELDER ADAPTED FOR USE WITH VARIOUS ELECTRIC POWER SOURCES TO WELD A CONDUCTIVE ELEMENT HELD IN A WELDING GUN TO A SECOND CONDUCTIVE ELEMENT COMPRISING, IN COMBINATION, (1) ISOLATING CIRCUIT MEANS FOR CONNECTING SAID WELDER WITH AN ELECTRIC POWER SOURCE, SAID ISOLATING CIRCUIT MEANS INCLUDING TRANSFORMER MEANS FOR ISOLATING AND WELDING GUN FROM THE EARTH GROUND OF SAID SOURCE, SAID TRANSFORMER MEANS INCLUDING MULTIPLE PRIMARY WINDING MEANS FOR CONNECTING SAID WELDER WITH VARIOUS ELECTRIC POWER SOURCES, (2) STORAGE CAPACITOR MEANS FOR STORING ELECTRIC WELDING ENERGY, (3) CAPACITOR CHARGING CIRCUIT MEANS FOR CHARGING SAID STORAGE CAPACITOR MEANS, SAID CAPACITOR CHARGING CIRCUIT MEANS BEING CONNECTED WITH SAID ISOLATING CIRCUIT MEANS AND SAID STORAGE CAPACITOR MEANS, SAID CAPACITOR CHARGING CIRCUIT MEANS COMPRISING (I) VOLTAGE MULTIPLIER CIRCUIT MEANS CONNECTED WITH SAID ISOLATING CIRCUIT MEANS FOR MULTIPLYING THE OUTPUT VOLTAGE OF SAID ISOLATING CIRCUIT MEANS, (II) VOLTAGE SENSING CIRCUIT MEANS OPERATIVELY CONNECTED WITH SAID STORAGE CAPACITOR MEANS FOR SENSING THE VOLTAGE STORED ON SAID STORAGE CAPACITOR MEANS AND (III) CHARGING CONTROL CIRCUIT MEANS RESPONSIVE TO SAID VOLTAGE SENS-
Claim 2
Dependent Claim
178 words
A LIGHTWEIGHT AND PORTABLE ELECTRIC WELDER ADAPTED FOR USE WITH VARIOUS ELECTRIC POWER SOURCES TO WELD A CONDUCTIVE ELEMENT HELD IN A WELDING GUN TO A SECOND CONDUCTIVE ELEMENT COMPRISING, IN COMBINATION, (1) ISOLATING CIRCUIT MEANS FOR CONNECTING SAID WELDER WITH AN ELECTRIC POWER SOURCE, SAID ISOLATING CIRCUIT MEANS INCLUDING TRANSFORMER MEANS FOR ISOLATING AND WELDING GUN FROM THE EARTH GROUND OF SAID SOURCE, SAID TRANSFORMER MEANS INCLUDING MULTIPLE PRIMARY WINDING MEANS FOR CONNECTING SAID WELDER WITH VARIOUS ELECTRIC POWER SOURCES, (2) STORAGE CAPACITOR MEANS FOR STORING ELECTRIC WELDING ENERGY, (3) CAPACITOR CHARGING CIRCUIT MEANS FOR CHARGING SAID STORAGE CAPACITOR MEANS, SAID CAPACITOR CHARGING CIRCUIT MEANS BEING CONNECTED WITH SAID ISOLATING CIRCUIT MEANS AND SAID STORAGE CAPACITOR MEANS, SAID CAPACITOR CHARGING CIRCUIT MEANS COMPRISING (I) VOLTAGE MULTIPLIER CIRCUIT MEANS CONNECTED WITH SAID ISOLATING CIRCUIT MEANS FOR MULTIPLYING THE OUTPUT VOLTAGE OF SAID ISOLATING CIRCUIT MEANS, (II) VOLTAGE SENSING CIRCUIT MEANS OPERATIVELY CONNECTED WITH SAID STORAGE CAPACITOR MEANS FOR SENSING THE VOLTAGE STORED ON SAID STORAGE CAPACITOR MEANS AND (III) CHARGING CONTROL CIRCUIT MEANS RESPONSIVE TO SAID VOLTAGE SENS-
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) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |