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US3909648A Expired / Lapsed US ⏱️ 0.0 years remaining

Electric motor having a winding insulating barrier and method of construction

Assignee: AO Smith Corp
•
Filing: 1973-07-27
•
Granted: 1975-09-30
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Expires: 1993-07-27
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Abstract

Abstract An insulating barrier between starting and running windings in a stator core includes insulating pegs between the windings having oppositely disposed axial projections extending beyond the outer axial ends of the stator core, and a plurality of end turn insulating separators each having a pair of transverse sections oppositely disposed at axial ends of the core interconnected by a plurality of legs disposed within predetermined stator slots and particularly between the starting and running windings adjacent to the insulating pegs with the pegs and separators overlapping for complete electrical insulation between the first and second windings. A coil transfer apparatus having a movable stripper operates to simultaneously transfer the end turn insulators and the starting coils into the stator slots, preferably through the use of a plastic circular guide element.

Inventors

  • 👤 Norman D Clark

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 23:57
CPC Classifications
H; H02; H02K; H02K15/00; H02K15/06; H02K15/062; H02K15/065; H02K15/067; H02K15/068; H02K15/10; H02K15/105; H02K3/00; H02K3/32; H02K3/38; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/53; Y10T29/5313; Y10T29/53143; Y10T29/53152; Y10T29/53161

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 178 words
A stator assembly for a dynamoelectric machine having a plurality of spaced, axially extending slots, a first winding, a second winding, said first and second windings wound in said slots and including a plurality of common slots retaining both said first and second windings, wherein the improvement comprises an insulating barrier means disposed between said first and second windings including a plurality of insulating pegs each disposed within said common slots and electrically separating said first and second windings and including oppositely disposed axial projections extending beyond the outer axial ends of said stator assembly, and a plurality of end turn insulating separators each including a pair of transverse sections oppositely disposed at axial ends of said stator assembly and interconnected by a plurality of legs each disposed within one of said common slots with each of said common slots containing a leg disposed adjacent to a peg and electrically separating said first and second windings, said axial projections of said pegs and said transverse sections overlapping and providing complete electrical insulation between said first and second windings.
Claim 2
Dependent Claim 178 words
A stator assembly for a dynamoelectric machine having a plurality of spaced, axially extending slots, a first winding, a second winding, said first and second windings wound in said slots and including a plurality of common slots retaining both said first and second windings, wherein the improvement comprises an insulating barrier means disposed between said first and second windings including a plurality of insulating pegs each disposed within said common slots and electrically separating said first and second windings and including oppositely disposed axial projections extending beyond the outer axial ends of said stator assembly, and a plurality of end turn insulating separators each including a pair of transverse sections oppositely disposed at axial ends of said stator assembly and interconnected by a plurality of legs each disposed within one of said common slots with each of said common slots containing a leg disposed adjacent to a peg and electrically separating said first and second windings, said axial projections of said pegs and said transverse sections overlapping and providing complete electrical insulation between said first and second windings.
Claim 3
Dependent Claim 21 words
The assembly of claim 1, wherein said adjacent transverse sections overlap and maintain electrical insulation between said first and second windings.
Claim 4
Dependent Claim 28 words
The assembly of claim 1, wherein said insulating pegs separating said first and second windings are disposed radially outward from said legs of said end turn insulating separators.

References Cited (Backward Citations)

US2701317A Cited
US2998540A Cited
US3062978A Cited
US3235762A Cited
US3439205A Cited
US3519862A Cited
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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) 1978-09-29 1979-03-31 1979-09-30 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-09-29 1983-03-31 1983-09-30 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-09-29 1987-03-31 1987-09-30 $7700.00 Window Closed / Lapsed

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