US3943392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination slot liner and retainer for dynamoelectric machine conductor bars
Assignee: Allis Chalmers Corp
•
Filing: 1974-11-27
•
Granted: 1976-03-09
•
Expires: 1994-11-27
Abstract
Abstract A U-shaped slot liner is provided with a porous spongy longitudinal rib on each leg. The ribs mate with complementary grooves in the dynamoelectric machine coil slot, side walls and the conductor bar side walls. When the assembled machine element is impregnated by a thermosetting liquid, the ribs absorb the liquid and become hard when heated.
Inventors
- 👤 John J. Keuper
- 👤 Paul D. Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:10
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/46; H02K3/48; H02K3/32; H02K3/34; H02K3/345; Y; Y10; Y10S; Y10S174/00; Y10S174/13; Y10S174/14; Y10S174/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
In a dynamoelectric machine including a core having a plurality of slots defined by side walls for receiving conductor bars, the improvement comprising: longitudinally extending grooves in said side walls; a substantially U-shaped slot liner defined by a pair of spaced legs, said slot liner having a longitudinally extending rib protruding from each side of each of said legs which aligns and mates with said coil slot side wall grooves when said lining is in the operative position; and a longitudinally extending groove in the sides of said conductor bars, said conductor bar grooves being in alignment and mating with said slot liner ribs when they are in the operative position, said slot liner ribs being constructed of a resilient absorbent material which after being impregnated with a thermosetting material and heated will cure and harden to securely hold said liner and conductor bars in said slots.
Claim 2
Dependent Claim
147 words
In a dynamoelectric machine including a core having a plurality of slots defined by side walls for receiving conductor bars, the improvement comprising: longitudinally extending grooves in said side walls; a substantially U-shaped slot liner defined by a pair of spaced legs, said slot liner having a longitudinally extending rib protruding from each side of each of said legs which aligns and mates with said coil slot side wall grooves when said lining is in the operative position; and a longitudinally extending groove in the sides of said conductor bars, said conductor bar grooves being in alignment and mating with said slot liner ribs when they are in the operative position, said slot liner ribs being constructed of a resilient absorbent material which after being impregnated with a thermosetting material and heated will cure and harden to securely hold said liner and conductor bars in said slots.
References Cited (Backward Citations)
US1320126A
Cited
US1396525A
Cited
US2400576A
Cited
US3505729A
Cited
US3444407A
Cited
US3621315A
Cited
US3646374A
Cited
US3750273A
Cited
US3824683A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-09 | 1979-09-08 | 1980-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-09 | 1983-09-08 | 1984-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-09 | 1987-09-08 | 1988-03-09 | $7700.00 | Window Closed / Lapsed |