US4594520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear pulse motor
Assignee: Shinko Electric Co Ltd
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Filing: 1985-04-24
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Granted: 1986-06-10
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Expires: 2005-04-24
Abstract
Abstract A linear pulse motor includes; a flat primary body having a pair of first magnetic circuit forming members provided with a coil; a flat secondary body including a second magnetic circuit forming member; the flat primary body and the flat secondary body being in parallel planes to each other and the one being movable relative to the other in one axis of direction; the first magnetic circuit forming members each having two head portions and two leg portions being substantially parallel to each other; first plural teeth being formed at constant pitch in the head portions respectively; the pair of first magnetic circuit forming members being so arranged that the head portions are concentrated to one another; second and third plural teeth being formed at the same constant pitch as the first plural teeth and in parallel rows, in the second magnetic circuit forming member, the second and third plural teeth being shifted from each other by a predetermined length.
Inventors
- 👤 Zenichiro Miwa
- 👤 Hiroshi Nakagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:08
CPC Classifications
H; H02; H02K; H02K41/00; H02K41/02; H02K41/03
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
324 words
A linear pulse motor comprising: (A) a flat primary body including a pair of first magnetic circuit forming means provided with coil means; (B) a flat secondary body including second magnetic circuit forming means; (C) said flat primary body and said flat secondary body being in parallel planes to each other and the one being movable relative to the other in one axis of direction; (D) said first magnetic circuit forming means each having two head portions and two leg portions being substantially parallel to each other; (E) first plural teeth being formed at constant pitch (P) in said head portions respectively; (F) said pair of first magnetic circuit forming means being so arranged that said head portions are concentrated to one another; (G) second and third plural teeth being formed at the same constant pitch (P) as said first plural teeth and in parallel rows, in said second magnetic circuit forming means, said second and third plural teeth being shifted from each other by a predetermined length; (H) the groups of said first plural teeth being shifted from one another in a predetermined order by a quarter of the constant pitch (1/4P) with respect to said second and third plural teeth; (I) a permanent magnet being so contacted with said head portions of the pair of first magnetic circuit forming means that the two head portions of one of the first magnetic circuit forming means are N-polarized and those of the other of the first magnetic circuit forming means are S-polarized; (J) guide means for guiding said one of the primary body and the secondary body movably in said one axis of direction, arranged between said primary body and said secondary body for maintaining the constant air gap between said first plural teeth, and said second and third plural teeth; and (K) the axes of said coil means around which said coil means are wound being substantially perpendicular to said constant air gap.
Claim 2
Dependent Claim
324 words
A linear pulse motor comprising: (A) a flat primary body including a pair of first magnetic circuit forming means provided with coil means; (B) a flat secondary body including second magnetic circuit forming means; (C) said flat primary body and said flat secondary body being in parallel planes to each other and the one being movable relative to the other in one axis of direction; (D) said first magnetic circuit forming means each having two head portions and two leg portions being substantially parallel to each other; (E) first plural teeth being formed at constant pitch (P) in said head portions respectively; (F) said pair of first magnetic circuit forming means being so arranged that said head portions are concentrated to one another; (G) second and third plural teeth being formed at the same constant pitch (P) as said first plural teeth and in parallel rows, in said second magnetic circuit forming means, said second and third plural teeth being shifted from each other by a predetermined length; (H) the groups of said first plural teeth being shifted from one another in a predetermined order by a quarter of the constant pitch (1/4P) with respect to said second and third plural teeth; (I) a permanent magnet being so contacted with said head portions of the pair of first magnetic circuit forming means that the two head portions of one of the first magnetic circuit forming means are N-polarized and those of the other of the first magnetic circuit forming means are S-polarized; (J) guide means for guiding said one of the primary body and the secondary body movably in said one axis of direction, arranged between said primary body and said secondary body for maintaining the constant air gap between said first plural teeth, and said second and third plural teeth; and (K) the axes of said coil means around which said coil means are wound being substantially perpendicular to said constant air gap.
Claim 3
Dependent Claim
77 words
A linear pulse motor according to claim 1, in which said first plural teeth are substantially perpendicular to said leg portions, the two of the groups of said first plural teeth aligned in said one axis of direction confront the one of said second and third plural teeth and the other two of the groups of said first plural teeth aligned in said one axis of direction confront the other of said second and third plural teeth.
Claim 4
Dependent Claim
22 words
A linear pulse motor according to claim 2, in which said predetermined length is equal to a half of the pitch (1/2P).
Claim 5
Dependent Claim
112 words
A linear pulse motor according to claim 2, in which said coil means are energized in such a manner that one of said coil means is energized in positive polarity for a predetermined time, at the same time as the deenergization of said one coil means, the other of said coil means is energaized in positive polarity for the predetermined time, at the same time as the deenergization of said other coil means, said one coil means is energized in negative polarity for the predetermined time, and at the same time as the deenergization of said one coil means, said other coil means is energized in negative polarity for the predetermined time.
Claim 6
Dependent Claim
129 words
A linear pulse motor according to claim 2, in which the groups of said first plural teeth of the head portions of the paired first magnetic circuit forming means are shifted from one another by a quarter of the pitch with respect to said second and third plural teeth in the following order of: one of the head portions of the one first magnetic circuit forming means, confronting the second plural teeth; one of the head portions of the other first magnetic circuit forming means, confronting the third plural teeth; the other of the head portions of the one first magnetic circuit forming means, confronting the third plural teeth; and the other of the head portions of the other first magnetic circuit forming means, confronting the second plural teeth.
Claim 7
Dependent Claim
130 words
A linear pulse motor according to claim 2, in which said guide means includes a pair of guide members arranged on the outer side end portions of said head portions along said leg portions and balls arranged in guide portions of said guide members, one of said guide members is fixed to said primary body, while the other of said guide members is so supported on said primary body as to be movable towards said one of the guide members, and is urged towards said one of the guide members by a spring, and cutout portions formed along the lengthwise sides of said secondary body ride on said balls, said balls being softly pinched between said cutout portions of the secondary body and said guide portions of the guide members.
Claim 8
Dependent Claim
37 words
A linear pulse motor according to claim 6, in which the rolling range of said balls are limited to a certain extent in the moving direction of said one of the primary body and the secondary body.
Claim 9
Dependent Claim
77 words
A linear pulse motor according to claim 1, in which said first plural teeth are substantially parallel to said leg portions, the two of the groups of said first plural teeth aligned in said one axis of direction confront the one of said second and third plural teeth and the other two of the groups of said first plural teeth aligned in said one axis of direction confront the other of said second and third plural teeth.
Claim 10
Dependent Claim
22 words
A linear pulse motor according to claim 8, in which said predetermined length is equal to a quarter of the pitch (1/4P).
Claim 11
Dependent Claim
112 words
A linear pulse motor according to claim 8, in which said coil means are energized in such a manner that one of said coil means is energized in positive polarity for a predetermined time, at the same time as the deenergization of said one coil means, the other of said coil means is energized in positive polarity for the predetermined time, at the same time as the deenergization of said other coil means, said one coil means is energized in negative polarity for the predetermined time, and at the same time as the deenergization of said one coil means, said other coil means is energized in negative polarity for the predetermined time.
Claim 12
Dependent Claim
129 words
A linear pulse motor according to claim 8, in which the groups of said first plural teeth of the head portions of the paired first magnetic circuit forming means are shifted from one another with respect to said second and third plural teeth by a quarter of the pitch in the following order of: one of the head portions of the one first magnetic circuit forming means, confronting the second plural teeth; one of the head portions of the other first magnetic circuit forming means, confronting the third plural teeth; the other of the head portions of the one first magnetic circuit forming means, confronting the second plural teeth; and the other of the head portions of the other first magnetic circuit forming means, confronting the third plural teeth.
Claim 13
Dependent Claim
135 words
A linear pulse motor according to claim 8, in which said guide means includes a pair of guide members arranged at both sides of the groups of said head portions in a substantially perpendicular direction to said leg portions and balls arranged in guide portions of said guide members, one of said guide members is fixed to said primary body, while the other of said guide members is so supported on said primary body as to be movable towards said one of the guide members, and is urged towards said one of the guide members by a spring, and cutout portions formed along the lengthwise sides of said secondary body ride on said balls, said balls being softly pinched between said cutout portions of the secondary body and said guide portions of the guide members.
Claim 14
Dependent Claim
37 words
A linear pulse motor according to claim 12 in which the rolling range of said balls are limited to a certain extent in the moving direction of said one of the primary body and the secondary body.
Claim 15
Dependent Claim
190 words
A linear pulse motor according to claim 2, in which said guide means includes a pair of support members arranged on the outer side end portions, of said head portions along said leg portions a pair of guide members having generally L-shaped cross-section, arranged slidably along said support members, balls received by a pair of cutouts formed in a vertical portion of each of said guide members, and rollers received by a pair of cutouts formed in a horizontal protion of each of said guide members, one of said support members is fixed to said primary body, while the other of said support members is so supported on said primary body as to be movable towards said one of the support members, and is urged towards said one of the support members by a spring, cutout portions formed along the lengthwise sides of said secondary body ride on said rollers, said balls are softly pinched between the lengthwise sides of said secondary body and said support members for guiding the movement of said one of the primary body and secondary body, and said air gap is maintained by said rollers.
Claim 16
Dependent Claim
39 words
A linear pulse motor according to claim 14, in which stoppers are fixed to said primary body at such positions that the slide movements of said guide members along said support members are limited to a predetermined length thereby.
Claim 17
Dependent Claim
195 words
A linear pulse motor according to claim 8, in which said guide means includes a pair of support members arranged at both sides of the groups of said head portions in a substantially perpendicular direction to said leg portions, a pair of guide members having generally L-shaped cross-section, arranged slidably along said support members, balls received by a pair of cutouts formed in a vertical portion of each of said guide members, and rollers received by a pair of cutouts formed in a horizontal portion of each of said guide members, one of said support members is fixed to said primary body, while the other of said support members is so supported on said primary body as to be movable towards said one of the support members, and is urged towards said one of the support members by a spring, cutout portions formed along the lengthwise sides of said secondary body ride on said rollers, said balls are softly pinched between the lengthwise sides of said secondary body and said support members for guiding the movement of said one of the primary body and secondary body, and said air gap is maintained by said rollers.
Claim 18
Dependent Claim
39 words
A linear pulse motor according to claim 16, in which stoppers are fixed to said primary body at such positions that the slide movements of said guide members along said support members are limited to a predetermined length thereby.
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) | 1989-06-09 | 1989-12-09 | 1990-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-09 | 1993-12-09 | 1994-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-09 | 1997-12-09 | 1998-06-10 | $7700.00 | Window Closed / Lapsed |