US4859977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulator device for power transformer
Assignee: Akai Electric Co Ltd
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Filing: 1988-10-26
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Granted: 1989-08-22
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Expires: 2008-10-26
Abstract
Abstract An insulator device to be inserted between a power transformer and a conductive chassis. Insulative washers are monolithically formed with the spacer. One washer is formed for each screw holding the transformer to the chassis. Each washer has a cylindrical protrusion which fits into a hole in the spacer. The screw extends through the washer, protrusion and spacer so as to be insulated from the transformer.
Inventors
- 👤 Kazuto Mochizuki
- 👤 Katsushi Kawahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:19
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/02; H01F27/027; H01F27/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
100 words
An insulator device and a power transformer, said transformer being mounted on a conductive chassis by at least one screw, comprising: a spacer between said transformer and said chassis, and having at least one hole receiving said at least one screw to mount said transformer to said conductive chassis; at least one insulation washer being monolithically formed with said, spacer and being folded to lie above said hole; and a cylindrical portion monolithically formed with said insulation washer and being inserted into said at least one hole to surround said screw; wherein said transformer is electrically insulated from said chassis.
Claim 2
Dependent Claim
100 words
An insulator device and a power transformer, said transformer being mounted on a conductive chassis by at least one screw, comprising: a spacer between said transformer and said chassis, and having at least one hole receiving said at least one screw to mount said transformer to said conductive chassis; at least one insulation washer being monolithically formed with said, spacer and being folded to lie above said hole; and a cylindrical portion monolithically formed with said insulation washer and being inserted into said at least one hole to surround said screw; wherein said transformer is electrically insulated from said chassis.
Claim 3
Dependent Claim
22 words
An insulator device as claimed in claim 1, wherein a plurality of insulation washers and corresponding holes are formed with said spacer.
Claim 4
Dependent Claim
17 words
An insulator device as claimed in claim 2, wherein said plurality of insulation washers have different lengths.
Claim 5
Dependent Claim
21 words
An insulator device as claimed in claim 1, wherein a plurality of holes are provided with respect to one insulation washer.
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) | 1992-08-21 | 1993-02-20 | 1993-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-21 | 1997-02-20 | 1997-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-21 | 2001-02-20 | 2001-08-22 | $7700.00 | Window Closed / Lapsed |