Patent US3710158A successfully refreshed from Google Patents.
US3710158A
Expired / Lapsed
US
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Alternating current generator with radial stator poles
Assignee: Robert Bosch GmbH
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Filing: 1971-11-01
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Granted: 1973-01-09
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Expires: 1991-11-01
Abstract
Abstract An alternating current generator has a rotor with a circular row of permanent magnetic poles which are alternately of opposite polarity, and a stator with U-shaped stator poles whose legs project in radial direction toward the rotor poles. The legs of each stator pole have circumferentially and axially spaced end portions located opposite two adjacent rotor poles of opposite polarity, respectively. An annular stator winding is located within the open annular space formed by the U-shaped stator poles.
Inventors
- 👤 K Bachle
- 👤 L Finkbeiner
- 👤 B Taubitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:51
CPC Classifications
H; H02; H02K; H02K21/00; H02K21/12; H02K21/22; H02K21/227; G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/46; G01P3/465; H02K21/14; H02K21/145; H02K2201/00; H02K2201/12; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
89 words
Alternating current generator with radial stator poles comprising a rotoR having a circumferential circular rotor surface made of a permanently magnetic material and forming circumferentially alternating magnetic rotor poles of opposite polarity; and a stator including a circular supporting body, an annular winding, and a circular row of stator poles mounted on said circular supporting body radially projecting toward said rotor surface, each stator pole consisting of a magnetizable material and having two end portions spaced in axial direction and respectively located opposite two rotor poles of opposite polarity.
Claim 2
Dependent Claim
89 words
Alternating current generator with radial stator poles comprising a rotoR having a circumferential circular rotor surface made of a permanently magnetic material and forming circumferentially alternating magnetic rotor poles of opposite polarity; and a stator including a circular supporting body, an annular winding, and a circular row of stator poles mounted on said circular supporting body radially projecting toward said rotor surface, each stator pole consisting of a magnetizable material and having two end portions spaced in axial direction and respectively located opposite two rotor poles of opposite polarity.
Claim 3
Dependent Claim
28 words
Generator as claimed in claim 1 wherein said stator is located within said rotor; and wherein said rotor surface and said circular row of stator poles are concentric.
Claim 4
Dependent Claim
28 words
Generator as claimed in claim 1 wherein said rotor is located within said stator; and wherein said rotor surface and said circular row of stator poles are concentric.
Claim 5
Dependent Claim
24 words
Generator as claimed in claim 1 wherein said end portions of each stator pole are located opposite adjacent rotor poles of opposite polarity, respectively.
Claim 6
Dependent Claim
43 words
Generator as claimed in claim 4 wherein said stator poles are U-shaped and have a pair of legs projecting toward said rotor surface, the legs of each pair having said end portions which are, respectively, located opposite two rotor poles of opposite polarity.
Claim 7
Dependent Claim
72 words
Generator as claimed in claim 4 wherein said stator poles are flat U-shaped sheets, each U-shaped sheet having a yoke and a pair of legs projecting toward said rotor surface, the legs of each pair having said end portions which are, respectively, located opposite two rotor poles of opposite polarity; wherein said supporting body has parallel grooves arranged in a circumferential row; and wherein said U-shaped sheets are mounted in said grooves.
Claim 8
Dependent Claim
36 words
Generator as claimed in claim 4 wherein said rotor poles are circumferentially narrow and extend in axial direction; and wherein said stator poles are circumferentially narrow and extend at a small angle to said rotor poles.
Claim 9
Dependent Claim
36 words
Generator as claimed in claim 7 wherein the tangent of said angle is equal to the circumferential distance between adjacent rotor poles divided by the mean circumferential distance between said end portions of a stator pole.
Claim 10
Dependent Claim
36 words
Generator as claimed in claim 4 wherein said stator poles are circumferentially narrow and extend in axial direction; and wherein said rotor poles are circumferentially narrow and extend at a small angle to said stator poles.
Claim 11
Dependent Claim
36 words
Generator as claimed in claim 9 wherein the tangent of said angle is equal to the circumferential distance between adjacent rotor poles divided by the mean circumferential distance between said end portions of a stator pole.
Claim 12
Dependent Claim
42 words
Generator as claimed in claim 4 wherein said stator poles and rotor poles are circumferentially narrow and extend in axial direction; and wherein said end portions of each stator pole are circumferentially spaced so as to be located opposite adjacent rotor poles.
Claim 13
Dependent Claim
84 words
Generator as claimed in claim 4 wherein each stator pole is composed of a pair of flat substantially L-shaped sheets, the thickness of each sheet being substantially equal to the circumferential distance between two adjacent rotor poles, each sheet having a longer leg and a shorter leg, the shorter leg of each sheet registering with the longer leg of the respective other sheet, and the longer legs of each pair of sheets having said end portions located opposite two rotor poles of opposite polarity.
Claim 14
Dependent Claim
57 words
Generator as claimed in claim 4 wherein said stator poles are U-shaped and have legs projecting toward said rotor surface; wherein said legs have said end portions; and wherein said end portions are larger than the remaining portions of said legs for reducing the magnetic resistance in the gap between said rotor surface and said stator poles.
Claim 15
Dependent Claim
37 words
Generator as claimed in claim 4 wherein said circular supporting body consists of a thermosetting synthetic plastic material, and has a circumferential row of grooVes in which said stator poles are mounted, respectively, insulated from each other.
Claim 16
Dependent Claim
46 words
Generator as claimed in claim 14 wherein said supporting body has two lateral annular surfaces formed with said grooves, said grooves extending in radial direction so that said stator poles can be mounted in said grooves with said end portions projecting radially inward or radially outward.
Claim 17
Dependent Claim
27 words
Generator as claimed in claim 14 wherein said stator includes a thermosetting plastic material partly embedding said stator poles so that only said end portions are free.
Claim 18
Dependent Claim
33 words
Generator as claimed in claim 14 wherein said stator includes an annular holding ring located on said stator poles remote from said end portions and said rotor surface for mechanically reinforcing said stator.
Claim 19
Dependent Claim
23 words
Generator as claimed in claim 17 wherein said holding ring consists of an electrically conductive material and is adapted to ground said stator.
Claim 20
Dependent Claim
18 words
Generator as claimed in claim 14 wherein said annular winding includes wires, and silicon caoutchouc between said wires.
Claim 21
Dependent Claim
48 words
Generator as claimed in claim 1 wherein said rotor includes an annular support, and a band attached to said annular support and forming a cylindrical ring having said rotor surface; and wherein said band consists of a permanently magnetizable material and of a bonding substance bonding said material.
Claim 22
Dependent Claim
33 words
Generator as claimed in claim 1 wherein said stator poles are U-shaped and together form an annular space open toward said rotor surface; and wherein said winding is located within said annular space.
Claim 23
Dependent Claim
32 words
Generator as claimed in claim 21 wherein said supporting body has a U-shaped cross section, is located in said annular space, and forms another annular space in which said winding is located.
Claim 24
Dependent Claim
40 words
Generator as claimed in claim 21 wherein said winding is located in said annular space abutting said U-shaped stator poles; and wherein said supporting body has a circular row of grooves mounting the yoke portions of said U-shaped stator poles.
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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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |