Patent US3506171A successfully refreshed from Google Patents.
US3348086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flat coreless direct current motor
Assignee: FUJIYA DENKI KK
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Filing: 1964-11-10
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Granted: 1967-10-17
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Expires: 1984-11-10
Abstract
No abstract record available.
Inventors
- 👤 Monma Hiroshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:29
CPC Classifications
H; H02; H02K; H02K23/00; H02K23/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A FLAT CORELESS DIRECT CURRENT MOTOR COMPRISING, IN COMBINATION, A SUBSTANTIALLY FLAT AND SUBSTANTIALLY PLANAR CORE ASSEMBLY INCLUDING FIVE TRUNCATED-SECTOR-SHAPE SUBSTANTIALLY FLAT COILS EACH HAVING AN ANGULAR EXTENT OF SUBSTANTIALLY 144* AND A PAIR OF RADIAL LEGS, SAID COILS BEING ARRANGED IN ARCUATELY OVERLAPPING RELATION WITH EACH COIL ARCUATELY OVERLAPPING ADJACENT COILS TO AN ANGULAR EXTENT OF SUBSTANTIALLY 72*; A PAIR OF TRUNCATED-SECTOR-SHAPE FIELD MAGNETS ARRANGED IN DIAMETRICALLY OPPOSED SYMMETRICALLY ARCUATELY SPACED RELATION AND SUBSTANTIALLY CONCENTRIC WITH SAID COIL ASSEMBLY; A COMMUTATOR SUBSTANTIALLY CONCENTRIC WITH SAID COIL ASSEMBLY; MEANS MOUNTING SAID COIL ASSEMBLY AS SAID COMMUTATOR FOR CONJOINT ROTATION RELATIVE TO SAID FIELD MAGNETS; MAGNETIC YOKE MEANS DEFINING, WITH SAID FIELD MAGNETS, AN AIR GAP IN WHICH SAID COIL ASSEMBLY
Claim 2
Dependent Claim
120 words
A FLAT CORELESS DIRECT CURRENT MOTOR COMPRISING, IN COMBINATION, A SUBSTANTIALLY FLAT AND SUBSTANTIALLY PLANAR CORE ASSEMBLY INCLUDING FIVE TRUNCATED-SECTOR-SHAPE SUBSTANTIALLY FLAT COILS EACH HAVING AN ANGULAR EXTENT OF SUBSTANTIALLY 144* AND A PAIR OF RADIAL LEGS, SAID COILS BEING ARRANGED IN ARCUATELY OVERLAPPING RELATION WITH EACH COIL ARCUATELY OVERLAPPING ADJACENT COILS TO AN ANGULAR EXTENT OF SUBSTANTIALLY 72*; A PAIR OF TRUNCATED-SECTOR-SHAPE FIELD MAGNETS ARRANGED IN DIAMETRICALLY OPPOSED SYMMETRICALLY ARCUATELY SPACED RELATION AND SUBSTANTIALLY CONCENTRIC WITH SAID COIL ASSEMBLY; A COMMUTATOR SUBSTANTIALLY CONCENTRIC WITH SAID COIL ASSEMBLY; MEANS MOUNTING SAID COIL ASSEMBLY AS SAID COMMUTATOR FOR CONJOINT ROTATION RELATIVE TO SAID FIELD MAGNETS; MAGNETIC YOKE MEANS DEFINING, WITH SAID FIELD MAGNETS, AN AIR GAP IN WHICH SAID COIL ASSEMBLY
References Cited (Backward Citations)
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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) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |