US3838370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solenoid magnet
Assignee: AKUTO GIKEN KK
•
Filing: 1973-08-30
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Granted: 1974-09-24
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Expires: 1993-08-30
Abstract
Abstract The armature of an electromagnet moves axially in two coaxial, annular pole pieces axially separated by the coil of the magnet when the coil is energized. In another electromagnet, radially projecting pole pieces of a rotor may be aligned simultaneously with corresponding pole pieces equiangularly spaced on the stator against the restraint of a return spring when the stator pole pieces are excited by an energized coil.
Inventors
- 👤 T Ueno
- 👤 Y Konakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:24
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/14; H01F7/145; H01F7/13; H01F7/16; H01F7/1607
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
134 words
A magnet arrangement comprising: a. a casing of magnetizable material; b. two annular pole pieces having respective, coaxial, central openings, said pole pieces being mounted on said casing in axially spaced relationship; c. an annular coil having an excitation winding about said axis, said coil being axially interposed between said pole pieces and having a central opening axially aligned with the openings of said pole pieces; and d. an armature axially slidable in the aligned openings of said pole pieces and said coil, said armature including 1. two bodies of magnetizable material dimensioned and arranged to be received simultaneously in the central openings of said pole pieces when said winding is energized, and 2. a rod member axially connecting said bodies, a portion of said rod member intermediate said bodies consisting of magnetizable material.
Claim 2
Dependent Claim
134 words
A magnet arrangement comprising: a. a casing of magnetizable material; b. two annular pole pieces having respective, coaxial, central openings, said pole pieces being mounted on said casing in axially spaced relationship; c. an annular coil having an excitation winding about said axis, said coil being axially interposed between said pole pieces and having a central opening axially aligned with the openings of said pole pieces; and d. an armature axially slidable in the aligned openings of said pole pieces and said coil, said armature including 1. two bodies of magnetizable material dimensioned and arranged to be received simultaneously in the central openings of said pole pieces when said winding is energized, and 2. a rod member axially connecting said bodies, a portion of said rod member intermediate said bodies consisting of magnetizable material.
Claim 3
Dependent Claim
20 words
a rod member axially connecting said bodies, a portion of said rod member intermediate said bodies consisting of magnetizable material.
Claim 4
Dependent Claim
20 words
a rod member axially connecting said bodies, a portion of said rod member intermediate said bodies consisting of magnetizable material.
Claim 5
Dependent Claim
25 words
An arrangement as set forth in claim 1, wherein said casing is tubular, said pole pieces being mounted on the inner wall of said casing.
Claim 6
Dependent Claim
30 words
a plurality of pole pieces of said material radially projecting from said body portion in circumferentially spaced relationship for simultaneous radial alignment with the pole pieces on said end walls.
Claim 7
Dependent Claim
30 words
a plurality of pole pieces of said material radially projecting from said body portion in circumferentially spaced relationship for simultaneous radial alignment with the pole pieces on said end walls.
Claim 8
Dependent Claim
67 words
a plurality of pole pieces of magnetizable material circumferentially spaced about the central opening of each of said end walls and extending from the associated end wall toward a pole piece on the other end wall, the pole pieces on one end wall being axially spaced from the pole pieces on the other end wall, said walls and said pole pieces jointly bounding an annular cavity, and
Claim 9
Dependent Claim
67 words
a plurality of pole pieces of magnetizable material circumferentially spaced about the central opening of each of said end walls and extending from the associated end wall toward a pole piece on the other end wall, the pole pieces on one end wall being axially spaced from the pole pieces on the other end wall, said walls and said pole pieces jointly bounding an annular cavity, and
Claim 10
Dependent Claim
24 words
each pole piece being axially aligned with a pole piece on the other end wall and axially spaced from the axially aligned pole piece.
Claim 11
Dependent Claim
24 words
each pole piece being axially aligned with a pole piece on the other end wall and axially spaced from the axially aligned pole piece.
Claim 12
Dependent Claim
21 words
a coil having excitation windings in said cavity; and b. a rotor mounted for rotation about said axis, said rotor including
Claim 13
Dependent Claim
21 words
a coil having excitation windings in said cavity; and b. a rotor mounted for rotation about said axis, said rotor including
Claim 14
Dependent Claim
8 words
A magnet arrangement comprising: a. a stator including
Claim 15
Dependent Claim
8 words
A magnet arrangement comprising: a. a stator including
Claim 16
Dependent Claim
61 words
An arrangement as set forth in claim 3, wherein said frame consists essentially of two substantially identical bodies, each body including one of said end walls and an axial portion of said circumferential wall, the pole pieces on the end wall of each body being axially aligned with the pole pieces on the other body and equiangularly spaced about said axis.
Claim 17
Dependent Claim
26 words
An arrangement as set forth in claim 4, wherein said pole pieces of said rotor are axially coextensive with the pole pieces on both end walls.
Claim 18
Dependent Claim
54 words
An arrangement as set forth in claim 3, wherein the axial spacing of the pole pieces on each end wall from the pole pieces on the other end wall is greater than the radial spacing of the pole pieces of said rotor from the pole pieces of said stator during said simultaneous radial alignment.
Claim 19
Dependent Claim
54 words
An arrangement as set forth in claim 3, wherein the pole pieces on said end walls have respective faces opposite said circumferential wall, said faces bounding said Cavity and being obliquely inclined relative to said axis, and each of the pole pieces on said end walls tapers axially away from the associated end wall.
Claim 20
Dependent Claim
22 words
An arrangement as set forth in claim 3, wherein the pole pieces of said rotor are each axially elongated and taper circumferentially.
Claim 21
Dependent Claim
99 words
A frame for a magnet arrangement comprising two substantially identical, approximately cup-shaped bodies of magnetizable material having a common axis and being axially juxtaposed in abutting engagement along a plane of symmetry radial relative to said axis, each body including a. an outer circumferential wall portion axially engaging the corresponding wall portion of the other body. b. a radially extending wall portion axially remote from the other body and formed with a central aperture, and c. a plurality of pole pieces projecting axially from said end wall toward the pole pieces on the end wall of the other body,
Claim 22
Dependent Claim
99 words
A frame for a magnet arrangement comprising two substantially identical, approximately cup-shaped bodies of magnetizable material having a common axis and being axially juxtaposed in abutting engagement along a plane of symmetry radial relative to said axis, each body including a. an outer circumferential wall portion axially engaging the corresponding wall portion of the other body. b. a radially extending wall portion axially remote from the other body and formed with a central aperture, and c. a plurality of pole pieces projecting axially from said end wall toward the pole pieces on the end wall of the other body,
Claim 23
Dependent Claim
24 words
A frame as set forth in claim 9, wherein said pole pieces are equiangularly spaced about the central aperture of the associated end plate.
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) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |