Patent US4117362A successfully refreshed from Google Patents.
US4117362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ripple-shaped tightening strip for retaining electric machine winding
Assignee: Individual
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Filing: 1977-04-19
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Granted: 1978-09-26
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Expires: 1997-04-19
Abstract
Abstract A ripple-shaped tightening strip disposed in radial slots of the core of an electric machine stator between the slot wedge and winding bar and comprising a rippled insulating member and an elastomeric resilient member fixed in the troughs of the rippled member. Such a strip has an increased strength, provides for a considerable total radial force provides for a sufficient take-up of the clearance between the slot wedge and the winding bar to compensate for its variations in a radial direction, caused by heat and electromagnetic forces when the electric machine is in operation.
Inventors
- 👤 Mark Zakharovich Tsirkin
- 👤 Viktor Ovshievich Kogan
- 👤 Rudolf Semenovich Polyakov
- 👤 Jury Leonidovich Presnov
- 👤 Elina Sergeevna Khanukova
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:25
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/46; H02K3/48; H02K3/487
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
101 words
An arrangement for retaining windings of an electric machine to restrict movement of the winding bars in radial slots of the core, comprising: an insulated winding bar disposed in an open slot of the core; a member retaining said bar extending longitudinally along said slot and spaced from said bar by a clearance; a ripple-shaped tightening strip disposed in said clearance between said bar and said retaining member and being in a compressed state, said ripple-shaped tightening strip being composed of a rigid insulating, essentially sheet, material and having elastomeric resilient members disposed in the troughs of said rippled-shaped tightening strip.
Claim 2
Dependent Claim
101 words
An arrangement for retaining windings of an electric machine to restrict movement of the winding bars in radial slots of the core, comprising: an insulated winding bar disposed in an open slot of the core; a member retaining said bar extending longitudinally along said slot and spaced from said bar by a clearance; a ripple-shaped tightening strip disposed in said clearance between said bar and said retaining member and being in a compressed state, said ripple-shaped tightening strip being composed of a rigid insulating, essentially sheet, material and having elastomeric resilient members disposed in the troughs of said rippled-shaped tightening strip.
Claim 3
Dependent Claim
28 words
An arrangement according to claim 1, in which said elastomeric resilient members are essentially of a partially cylindrical shape to match the troughs of said ripple-shaped tightening strip.
Claim 4
Dependent Claim
29 words
An arrangement according to claim 1, in which said elastomeric resilient members have a thickness smaller than the full depth of the troughs of said uncompressed ripple-shaped tightening strip.
Claim 5
Dependent Claim
26 words
An arrangement according to claim 1, in which said elastomeric resilient members are fixed in the troughs of said ripple-shaped tightening strip by means of bonding.
Claim 6
Dependent Claim
19 words
An arrangement according to claim 1, in which said elastomeric resilient members are composed of a heat-resistant polymer material.
Claim 7
Dependent Claim
28 words
An arrangement according to claim 5, in which said elastomeric resilient members are composed of polyester urethane epoxy with an epoxy-group content of 6 to 10 per cent.
Claim 8
Dependent Claim
19 words
An arrangement according to claim 5, in which said elastomeric resilient members are composed of low-molecular methyl-phenyl-siloxane synthetic rubber.
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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) | 1981-09-25 | 1982-03-27 | 1982-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-25 | 1986-03-27 | 1986-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-25 | 1990-03-27 | 1990-09-26 | $7700.00 | Window Closed / Lapsed |