Patent US3558877A successfully refreshed from Google Patents.
US4028568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
AC Generator for vehicles
Assignee: Hitachi Ltd
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Filing: 1975-10-29
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Granted: 1977-06-07
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Expires: 1995-10-29
Abstract
Abstract An ac generator for a vehicle in which a stator frame having a stator core fixed thereto and supporting a rotary shaft therein is composed of a pair of end covers of steel plate and a cylindrical casing of steel plate, and the end covers, cylindrical casing and stator core are integrally connected together by welding so as to ensure a high mechanical strength.
Inventors
- 👤 Hideo Tatsumi
- 👤 Yasushi Ohuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:36
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/12; H02K1/18; H02K1/185; H02K5/00; H02K5/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
111 words
In an ac generator driven by the engine of a vehicle comprising a stator including a stator core, a stator winding wound around said stator core, and a stator frame surrounding said stator core, and a rotor including rotary magnetic poles and a field winding and rotatably supported within said stator frame, the improvement wherein said stator frame comprises a pair of steel plate end covers and a steel plate cylindrical casing confined between said steel plate end covers, and further comprising a U-shaped generator mounting seat affixed to said stator frame and wherein said stator core, end covers, cylindrical casing and U-shaped seat are welded together as an integral unit.
Claim 2
Dependent Claim
111 words
In an ac generator driven by the engine of a vehicle comprising a stator including a stator core, a stator winding wound around said stator core, and a stator frame surrounding said stator core, and a rotor including rotary magnetic poles and a field winding and rotatably supported within said stator frame, the improvement wherein said stator frame comprises a pair of steel plate end covers and a steel plate cylindrical casing confined between said steel plate end covers, and further comprising a U-shaped generator mounting seat affixed to said stator frame and wherein said stator core, end covers, cylindrical casing and U-shaped seat are welded together as an integral unit.
Claim 3
Dependent Claim
26 words
The improvement according to claim 1, wherein each of said end covers is provided with a plurality of spaced apart lugs on the inner walls thereof.
Claim 4
Dependent Claim
76 words
The improvement according to claim 1, wherein said end covers are each formed with a plurality of radial projections which are suitably spaced from each other on the same circumference, and said cylindrical casing is shaped to conform to the outer peripheral contour of said end covers, so that through bolts can extend freely across the space defined between said radial projections and said stator core to tightly hold said cylindrical casing between said end covers.
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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) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |