Patent US4730176A successfully refreshed from Google Patents.
US4730176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnet having a pivoted polarized armature
Assignee: Omron Corp
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Filing: 1987-02-10
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Granted: 1988-03-08
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Expires: 2007-02-10
Abstract
Abstract An electromagnet device is assembled to, e.g., an electromagnetic relay. This device comprises a movable assembly which is swingably supported and a core in which a coil is wound around a part thereof. The movable assembly has two magnetic plates arranged so as to face each other with a distance and one permanent magnet arranged between those magnetic plates. Each magnetic plate has operating portions at both end portions thereof in which magnetic poles appear due to the permanent magnet. The core has two end portions which are arranged so as to respectively face the operating portions of the magnetic plates. At least one of the operating portions which faces at least one of the end portions of the core is formed at the edge surface of the magnetic plate.
Inventors
- 👤 Kenichi Matsuo
- 👤 Muneo Nakata
- 👤 Kazuhiro Oota
- 👤 Mitukazu Hori
- 👤 Tooru Oohara
- 👤 Makoto Yazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:02
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/22; H01H51/2227
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
121 words
An electromagnet device comprising: a movable assembly supported swingably and having two magnetic plates which are arranged so as to face each other with a predetermined interval and a permanent magnet arranged between said two magnetic plates, each of said magnetic plates having operating portions in which magnetic poles appear at both end portions of said magnetic plate; and a core having two end portions and around which a coil is wound, both of said end portions being arranged so as to respectively face said operating portions of said magnetic plates, wherein at least one of the operating portions which faces at least one of said end portions of said core is formed at the edge surface of the magnetic plate.
Claim 2
Dependent Claim
121 words
An electromagnet device comprising: a movable assembly supported swingably and having two magnetic plates which are arranged so as to face each other with a predetermined interval and a permanent magnet arranged between said two magnetic plates, each of said magnetic plates having operating portions in which magnetic poles appear at both end portions of said magnetic plate; and a core having two end portions and around which a coil is wound, both of said end portions being arranged so as to respectively face said operating portions of said magnetic plates, wherein at least one of the operating portions which faces at least one of said end portions of said core is formed at the edge surface of the magnetic plate.
Claim 3
Dependent Claim
32 words
An electromagnet device according to claim 1, wherein said movable assembly further includes an insulating member and said insulating member is formed with a projection adapted to drive a movable contact member.
Claim 4
Dependent Claim
67 words
A structure to fix the electromagnet device according to claim 1 to a base comprising: means, provided for said base, for engaging with a part of said electromagnet device; and a spring member, provided for at least either one of said electromagnet device and base, for pressing the electromagnet device toward said engaging means in the state in which the electromagnet device is attached to the base.
References Cited (Backward Citations)
US4142166A
Cited
JPS5566361A
Cited
JPS5643580A
Cited
JPS57185151A
Cited
JPS58180006A
Cited
JPS6035438A
Cited
JPS6176920A
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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) | 1991-03-08 | 1991-09-07 | 1992-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-08 | 1995-09-07 | 1996-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-08 | 1999-09-07 | 2000-03-08 | $7700.00 | Window Closed / Lapsed |