US4584622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transient voltage surge suppressor
Assignee: Corning Cable Systems Puerto Rico Inc
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Filing: 1984-07-09
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Granted: 1986-04-22
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Expires: 2004-07-09
Abstract
Abstract A transient voltage surge suppressor for an AC powerline comprises two semiconductor voltage limiting devices before a low pass LC filter and a third semiconductor voltage limiting device after the filter. The suppressor can be plugged into a 120 volt receptacle for protection of sensitive electronic equipment.
Inventors
- 👤 John J. Crosby
- 👤 John J. Napiorkowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:34
CPC Classifications
H; H02; H02H; H02H9/00; H02H9/005
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
123 words
A voltage surge suppressor for AC power lines comprising a circuit comprising: an input consisting of a line, a neutral and a ground; a first varistor connected between the line and ground; a second varistor connected between the neutral and ground; a first capacitor in parallel with the first varistor; a second capacitor in parallel with the second varistor; a first choke connected in series with the line after the first varistor and first capacitor; a second choke connected in series with the neutral after the second varistor and second capacitor; a third varistor connected between the line and neutral after the two chokes; a third capacitor in parallel with the third varistor and an output to which electronic equipment can be connected.
Claim 2
Dependent Claim
123 words
A voltage surge suppressor for AC power lines comprising a circuit comprising: an input consisting of a line, a neutral and a ground; a first varistor connected between the line and ground; a second varistor connected between the neutral and ground; a first capacitor in parallel with the first varistor; a second capacitor in parallel with the second varistor; a first choke connected in series with the line after the first varistor and first capacitor; a second choke connected in series with the neutral after the second varistor and second capacitor; a third varistor connected between the line and neutral after the two chokes; a third capacitor in parallel with the third varistor and an output to which electronic equipment can be connected.
Claim 3
Dependent Claim
23 words
The suppressor of claim 1 wherein the circuit includes a light emitting diode to indicate when electrical power is supplied to the input.
Claim 4
Dependent Claim
19 words
The suppressor of claim 1 wherein the circuit includes a PTC protector in series with one of the varistors.
References Cited (Backward Citations)
US4152743A
Cited
US4259705A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |