US4691272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inverse rectifier
Assignee: Heimann GmbH
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Filing: 1985-11-27
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Granted: 1987-09-01
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Expires: 2005-11-27
Abstract
Abstract An inverse rectifier for use with a high voltage transformer of an x-ray generator has an air-core coil disposed between the load output and two switching transistors in a half-bridge circuit. The junctions of the air-core coils with the switching transistors are cross-connected to a constant voltage source through respective diodes which block the constant voltage. An RC element is connected in parallel with each air-core coil.
Inventors
- 👤 Georg Geus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:11
CPC Classifications
H; H05; H05G; H05G1/00; H05G1/08; H05G1/10; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537; H02M7/538; H05G1/20
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
112 words
An inverse rectifier for use with a high voltage transformer of an x-ray generator comprising: two switching transistors connected to a common load output; a constant voltage source having a positive pole and a negative pole, said constant voltage source being connected to said load output through said two switching transistors for alternately connecting said positive and negative poles of said constant voltage source to said load output; two air-core coils respectively connected between said load output and said switching transistors at respective junctions; and two diodes cross-connected between said junctions and said constant voltage source, said diodes being respectively polarized so as to block the voltage from said constant voltage source.
Claim 2
Dependent Claim
112 words
An inverse rectifier for use with a high voltage transformer of an x-ray generator comprising: two switching transistors connected to a common load output; a constant voltage source having a positive pole and a negative pole, said constant voltage source being connected to said load output through said two switching transistors for alternately connecting said positive and negative poles of said constant voltage source to said load output; two air-core coils respectively connected between said load output and said switching transistors at respective junctions; and two diodes cross-connected between said junctions and said constant voltage source, said diodes being respectively polarized so as to block the voltage from said constant voltage source.
Claim 3
Dependent Claim
36 words
An inverse rectifier as claimed in claim 1, further comprising two RC elements each formed by a resistor and a capacitor connected in series, said RC elements being respectively connected in parallel with each air-core coil.
References Cited (Backward Citations)
FR2408970A1
Cited
US4184075A
Cited
US4170734A
Cited
US4200897A
Cited
CH625369A5
Cited
US4301496A
Cited
SU978293A1
Cited
EP0047957A1
Cited
US4429347A
Cited
EP0102532A2
Cited
EP0108336A2
Cited
DE3415011A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-31 | 1991-03-02 | 1991-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-31 | 1995-03-02 | 1995-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-31 | 1999-03-02 | 1999-09-01 | $7700.00 | Window Closed / Lapsed |