Patent US4051398A successfully refreshed from Google Patents.
US4051398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coil means for driving a linear motor
Assignee: Fujifilm Corp
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Filing: 1976-04-15
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Granted: 1977-09-27
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Expires: 1996-04-15
Abstract
Abstract A series of thin electromagnetic print coils of rectangular shape are arranged in a line overlapped with each other in which each coil is slightly offset from the preceding coil, and are molded together with a plastic material to form a thin elongated coil group. The coil group is bent into the shape of rectangular or rounded "U" to guide therealong a movable member carrying therewith a permanent magnet. Preferably, longitudinally extending parts of windings of the coils are bent outward at right angles to the remaining part of the windings.
Inventors
- 👤 Toshihiro Kondo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:27
CPC Classifications
H; H02; H02K; H02K41/00; H02K41/02; H02K41/03; H02K41/031; H02K3/00; H02K3/04; H02K3/26
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
107 words
A coil means for driving a movable member in a linear motor system comprising a series of electromagnetic coils arranged in a line along a path in which the movable member travels, and energized successively from one at one end thereof to the one at the other end in the direction of movement of the movable member, said series of electromagnetic coils being in the form of thin coils and arranged in a line partially overlapped with each other and fixed together to form an elongated one-piece coil group, and said coil group having a cross-section of a shape of "U" to guide the movable member therein.
Claim 2
Dependent Claim
107 words
A coil means for driving a movable member in a linear motor system comprising a series of electromagnetic coils arranged in a line along a path in which the movable member travels, and energized successively from one at one end thereof to the one at the other end in the direction of movement of the movable member, said series of electromagnetic coils being in the form of thin coils and arranged in a line partially overlapped with each other and fixed together to form an elongated one-piece coil group, and said coil group having a cross-section of a shape of "U" to guide the movable member therein.
Claim 3
Dependent Claim
20 words
A coil means for driving a movable member as defined in claim 1 wherein said coils are rectangular thin coils.
Claim 4
Dependent Claim
31 words
A coil means for driving a movable member as defined in claim 2 wherein said coils are print coils each consisting of a plastic substrate and a print coil deposited thereon.
Claim 5
Dependent Claim
22 words
A coil means for driving a movable member as defined in claim 3 wherein said coils comprise vacuum evaporated, photoetched conductive material.
Claim 6
Dependent Claim
14 words
A coil means as defined in claim 4 wherein said conductive material is copper.
Claim 7
Dependent Claim
14 words
A coil means as defined in claim 4 wherein said conductive material is silver.
Claim 8
Dependent Claim
45 words
A coil means for driving a movable member as defined in claim 2 wherein a part of windings of the rectangular coils extending in the direction of travel of the movable member is bent at right angles outward with respect to the remaining part thereof.
Claim 9
Dependent Claim
50 words
A coil means for driving a movable member as claimed in claim 1 wherein the curved portion of said "U" shaped coil group cross-section lies substantially in the middle of each of said electromagnetic coils and the leg portions of the "U" shaped coil group are substantially equal in length.
Claim 10
Dependent Claim
36 words
A coil means for driving a movable member as claimed in claim 1 further comprising a guide rail means mounted at the curved portion of said "U" shaped coil group cross-section for guiding said movable member.
Claim 11
Dependent Claim
25 words
A coil means for driving a movable member as claimed in claim 1 further comprising a movable member, said movable member comprising a permanent magnet.
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) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |