US4993787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic relay
Assignee: Omron Corp
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Filing: 1989-09-11
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Granted: 1991-02-19
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Expires: 2009-09-11
Abstract
Abstract An electromagnetic relay having an electromagnetic block with a roughly U-shaped iron core formed with a pair of bent opposing magnetic poles at both the ends thereof and with a coil wound therearound via a spool; and an armature block with both ends thereof opposing the magnetic poles and with the middle portion thereof pivotally supported. A permanent magnet is disposed between the two opposing magnet poles of the iron core so as to oppose said armature. The permanent magnet is supported by a support member formed integral with the spool of the electromagnetic block. The armature is pivotally supported by the electromagnetic block.
Inventors
- 👤 Takashi Tanaka
- 👤 Takezo Sano
- 👤 Tsutomu Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:14
CPC Classifications
H; H01; H01H; H01H11/00; H01H11/0056; H01H51/00; H01H51/22; H01H51/2272; H01H51/2281; H01H51/229; H01H2011/0087; H01H50/00; H01H50/02; H01H50/04; H01H50/041; H01H50/043; H01H2050/044
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
204 words
An electromagnetic relay, comprising: a base made of insulating material and including a fixed contact terminal member provided with a fixed contact and a common terminal member provided with a contact portion; an electromagnetic block including a substantially U-shaped core formed with a pair of magnetic poles, one of said magnetic poles at each end thereof, a coil wound on a spool around the core, and a permanent magnet disposed adjacent to the center of the core between the two magnetic poles; and an armature block provided with an armature and a movable contact and pivotally supported on the electromagnetic block at substantially the middle thereof to move the movable contact into contact with or away from the fixed contact on the basis of energization or deenergization of the electromagnetic block, wherein said armature block further comprises a contact connection member having wing portions extending along a longitudinal side of the armature, which contact connection member is connected to the movable contact and extends from the middle portion thereof to the sideward direction, the contact connection member being fixed and electrically connected by both ends of each of said wing portions to the contact portion of the common terminal member at an end thereof.
Claim 2
Dependent Claim
204 words
An electromagnetic relay, comprising: a base made of insulating material and including a fixed contact terminal member provided with a fixed contact and a common terminal member provided with a contact portion; an electromagnetic block including a substantially U-shaped core formed with a pair of magnetic poles, one of said magnetic poles at each end thereof, a coil wound on a spool around the core, and a permanent magnet disposed adjacent to the center of the core between the two magnetic poles; and an armature block provided with an armature and a movable contact and pivotally supported on the electromagnetic block at substantially the middle thereof to move the movable contact into contact with or away from the fixed contact on the basis of energization or deenergization of the electromagnetic block, wherein said armature block further comprises a contact connection member having wing portions extending along a longitudinal side of the armature, which contact connection member is connected to the movable contact and extends from the middle portion thereof to the sideward direction, the contact connection member being fixed and electrically connected by both ends of each of said wing portions to the contact portion of the common terminal member at an end thereof.
Claim 3
Dependent Claim
41 words
An electromagnetic relay as defined in claim 1, wherein the contact connection member is fixed to the contact portion of the common terminal member at the end thereof and arranged so as to allow smooth pivotal motion of the armature block.
Claim 4
Dependent Claim
30 words
An electromagnetic relay as defined in claim 1, wherein said armature block is further provided with a movable contact member formed with the movable contact and the contact connection member.
Claim 5
Dependent Claim
43 words
An electromagnetic relay as defined in claim 1, wherein said armature block is provided with a movable contact member formed with the movable contact, and wherein the movable contact member and the contact connection member are fixed to the armature through insulating material.
References Cited (Backward Citations)
JPS59143235A
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US4551698A
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JPS61218035A
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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) | 1994-02-18 | 1994-08-20 | 1995-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-18 | 1998-08-20 | 1999-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-18 | 2002-08-20 | 2003-02-19 | $7700.00 | Window Closed / Lapsed |