US3611230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary transformer structure
Assignee: LEBOW ASSOCIATES Inc
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Filing: 1970-11-23
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Granted: 1971-10-05
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Expires: 1990-11-23
Abstract
Abstract An apparatus for coupling electrical energy between a stator and rotor member without physical contact between relatively moving current carrying members and without relative rotation of any magnetic structure comprises a rotor shaft on which is mounted a nonconductive, nonmagnetic rotor coil-supporting flange which extends between stationary magnetically permeable stator core halves. The stator core is provided with a stator coil for transmission of electrical signals between the rotatable rotor coil and the stationary stator coil. Alternatively, the magnetically permeable core halves can each be secured to the rotor shaft for rotation therewith, while a nonconductive nonmagnetic and stationary stator coil-supporting flange extends between such core halves from the apparatus housing.
Inventors
- 👤 Douglas Maake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:31
CPC Classifications
H; H01; H01F; H01F38/00; H01F38/18
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
154 words
A rotary transformer comprising: a rotor shaft; a nonconductive nonmagnetic rotor coil support means coaxially fixed on said rotor shaft for rotation therewith and carrying a rotating coaxial rotor coil; a nonrotatable magnetically permeable stator core member disposed adjacent said shaft in spaced relation thereto and partly enclosing a portion of said rotor coil support means and said rotor coil; said stator core member having a stator coil supported thereon adjacent to but spaced from said rotor coil; said nonrotatable stator core member including a pair of magnetically permeable torroidal core sections coaxially surrounding said rotor shaft, said torroidal core sections being disposed relative to each other to form a gap between them for the extension of said nonconductive rotor coil support therethrough in nonabutting relationship; said gap between said torroidal core sections providing a fixed gap dimension uneffected by a relative misaligned position of said rotor shaft and said rotor coil support member.
Claim 2
Dependent Claim
154 words
A rotary transformer comprising: a rotor shaft; a nonconductive nonmagnetic rotor coil support means coaxially fixed on said rotor shaft for rotation therewith and carrying a rotating coaxial rotor coil; a nonrotatable magnetically permeable stator core member disposed adjacent said shaft in spaced relation thereto and partly enclosing a portion of said rotor coil support means and said rotor coil; said stator core member having a stator coil supported thereon adjacent to but spaced from said rotor coil; said nonrotatable stator core member including a pair of magnetically permeable torroidal core sections coaxially surrounding said rotor shaft, said torroidal core sections being disposed relative to each other to form a gap between them for the extension of said nonconductive rotor coil support therethrough in nonabutting relationship; said gap between said torroidal core sections providing a fixed gap dimension uneffected by a relative misaligned position of said rotor shaft and said rotor coil support member.
Claim 3
Dependent Claim
69 words
In the rotary transformer of claim 1, said stator core member being substantially U-shaped providing parallel spaced radially extending legs for extension along opposite sides of said rotor coil support means; said pair of torroidal core sections being axially spaced and fixedly mounted to opposite inner surfaces of said stator core member legs, said rotor coil support means extending radially through the axial gap between said torroidal core sections.
Claim 4
Dependent Claim
43 words
In the rotary transformer of claim 2, said rotor coil support means comprising a radial flange provided at its outer circumference with a channel-shaped portion surrounding and spaced outwardly from said torroidal core sections for the receipt and retainment of said rotor coil.
Claim 5
Dependent Claim
38 words
In the rotary transformer of claim 1, said pair of torroidal core sections being coplanar and radially spaced from each other, said nonconductive rotor coil support means extending axially through the radial gap between said torroidal core sections.
Claim 6
Dependent Claim
63 words
In the rotary transformer of claim 4, said rotor coil support means comprising a tubular member coaxially surrounding said rotor shaft and having one end fixed to said shaft axially beyond said stator core member; the free end of said tubular member extending into said stator core member and being provided with a circumferential channel-shaped portion for the support of said rotor coil.
Claim 7
Dependent Claim
65 words
In the rotary transformer of claim 5, said stator core member being substantially U-shaped with its parallel legs extending axially on opposite radial sides of said tubular rotor coil-supporting member, and said coaxial and coplanar torroidal core sections being mounted on he respective ends of said stator core legs, said tubular rotor coil-supporting member extending axially through the radial gap between said torroidal core sections.
Claim 8
Dependent Claim
113 words
An inductive coupling between relatively fixed and rotatable members comprising: a rotor shaft, a nonconductive rotor coil support member fixedly mounted on said rotor shaft for rotation therewith; a nonrotatable magnetically permeable stator core member disposed adjacent said rotor shaft; a pair of magnetically permeable torroidal core members coaxially surrounding said rotor shaft and fixedly secured to said stator core member to form a unitary structure therewith; said torroidal core members being spaced from each other to permit the extension of said rotatable nonconductive rotor coil support member therethrough; said rotor coil support member carrying a rotor coil and said stator core member carrying a stator coil radially spaced from said rotor coil.
Claim 9
Dependent Claim
113 words
An inductive coupling between relatively fixed and rotatable members comprising: a rotor shaft, a nonconductive rotor coil support member fixedly mounted on said rotor shaft for rotation therewith; a nonrotatable magnetically permeable stator core member disposed adjacent said rotor shaft; a pair of magnetically permeable torroidal core members coaxially surrounding said rotor shaft and fixedly secured to said stator core member to form a unitary structure therewith; said torroidal core members being spaced from each other to permit the extension of said rotatable nonconductive rotor coil support member therethrough; said rotor coil support member carrying a rotor coil and said stator core member carrying a stator coil radially spaced from said rotor coil.
Claim 10
Dependent Claim
139 words
A rotary transformer comprising: a housing: a rotor shaft rotatably mounted in said housing; a nonconductive nonmagnetic coIl support means coaxially fixed on one of said rotor shaft and said housing and carrying a first coaxial coil; a magnetically permeable core member fixed on the other of said rotor shaft and said housing and partly enclosing a portion of said coil support means and said first coil; said core member having a second coil supported thereon adjacent to but spaced from said first coil; said core member including a pair of magnetically permeable core sections disposed relative to each other to form a gap between them for the extension of said nonconductive coil support means therethrough in nonabutting relationship; said gap between said core sections providing a constant gap dimension uneffected by any relative rotation between said core sections.
Claim 11
Dependent Claim
139 words
A rotary transformer comprising: a housing: a rotor shaft rotatably mounted in said housing; a nonconductive nonmagnetic coIl support means coaxially fixed on one of said rotor shaft and said housing and carrying a first coaxial coil; a magnetically permeable core member fixed on the other of said rotor shaft and said housing and partly enclosing a portion of said coil support means and said first coil; said core member having a second coil supported thereon adjacent to but spaced from said first coil; said core member including a pair of magnetically permeable core sections disposed relative to each other to form a gap between them for the extension of said nonconductive coil support means therethrough in nonabutting relationship; said gap between said core sections providing a constant gap dimension uneffected by any relative rotation between said core sections.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |