US5252940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soft magnetic material
Assignee: Seiko Epson Corp
•
Filing: 1991-03-22
•
Granted: 1993-10-12
•
Expires: 2011-03-22
Abstract
Abstract A magnetic material and an actuator having magnetic circuit elements incorporating the magnetic material formed of equal amounts of iron and cobalt and between about 2.1 to 5% by weight vanadium. The actuator is well suited for inclusion in an impact printer for driving the impact members of the impact printer in response to printing signals. The composition of the magnetic material of the actuator provides high energy efficiency under greatly fluctuating direct current conditions by reducing eddy currents.
Inventors
- 👤 Minoru Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:03
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; B; B41; B41J; B41J2/00; B41J2/22; B41J2/23; B41J2/27; H02; H02K; H02K1/00; H02K1/02
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
36 words
A soft magnetic material having a composition consisting essentially of Fe, Co and V and formulated with substantially equal amounts of Fe and Co by weight with the balance from 2.4 to 2.8 weight percent vanadium.
Claim 2
Dependent Claim
36 words
A soft magnetic material having a composition consisting essentially of Fe, Co and V and formulated with substantially equal amounts of Fe and Co by weight with the balance from 2.4 to 2.8 weight percent vanadium.
Claim 3
Dependent Claim
20 words
The soft magnetic material of claim 1, wherein the vanadium is present as about 2.6 weight percent of the material.
Claim 4
Dependent Claim
51 words
An actuator including a coil disposed around ac ore for converting electrical current to magnetic force, the core comprising an alloy of soft magnetic material consisting essentially of fe, Co and V and formulated with substantially equal amounts of iron and cobalt and between about 2.4 to 2.8% by weight vanadium.
Claim 5
Dependent Claim
51 words
An actuator including a coil disposed around ac ore for converting electrical current to magnetic force, the core comprising an alloy of soft magnetic material consisting essentially of fe, Co and V and formulated with substantially equal amounts of iron and cobalt and between about 2.4 to 2.8% by weight vanadium.
Claim 6
Dependent Claim
15 words
the actuator of claim 3, wherein the Fe-Co-V alloy consists of Fe, Co and V.
Claim 7
Dependent Claim
18 words
The actuator of claim 3, wherein the percentage ofvanadium in the Fe-Co-V alloy is about 2.6% by weight.
Claim 8
Independent Claim
36 words
A method of forming soft magnetic material, consisting essentially of Fe, Co and V, comprising combining substantially equal amounts of iron and cobalt with from 2.4 to 2.8 wt % vanadium to form an Fe-Co-V alloy.
Claim 9
Independent Claim
36 words
A method of forming soft magnetic material, consisting essentially of Fe, Co and V, comprising combining substantially equal amounts of iron and cobalt with from 2.4 to 2.8 wt % vanadium to form an Fe-Co-V alloy.
Claim 10
Dependent Claim
17 words
The method of claim 6, wherein about 2.6 wt % vanadium is included in the Fe-Co-V alloy.
Claim 11
Dependent Claim
17 words
The soft magnetic material of claim 1, wherein the Fe-Co-V alloy consists of Fe, Co and V.
Claim 12
Dependent Claim
17 words
The soft magnetic material of claim 8, wherein the Fe-Co-V alloy includes about 2.6% by weight V.
Claim 13
Dependent Claim
12 words
The actuator of claim 4, wherein the Fe-Co-V alloy contains 2.6% vanadium.
Claim 14
Dependent Claim
15 words
The method of claim 6, wherein the Fe-Co-V alloy consists of Fe, Co and V.
Claim 15
Dependent Claim
13 words
The method of claim 11, wherein the Fe-Co-V alloy contains about 2.65 V.
References Cited (Backward Citations)
US3024141A
Cited
US3624568A
Cited
US3891475A
Cited
US4247601A
Cited
US4626115A
Cited
JPS61253348A
Cited
JPS61281542A
Cited
JPS6222404A
Cited
JPS6222403A
Cited
JPS6240344A
Cited
US4820065A
Cited
JPS63149356A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-10-11 | 1997-04-12 | 1997-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-10-11 | 2001-04-12 | 2001-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-10-11 | 2005-04-12 | 2005-10-12 | $7700.00 | Window Closed / Lapsed |