US3742270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single support eddy current coupling
Assignee: Eaton Corp
•
Filing: 1971-12-02
•
Granted: 1973-06-26
•
Expires: 1991-12-02
Abstract
Abstract An electromagnetic coupling includes rotatable input and output members, a stationary annular coil supported by a stationary field member, an inductor drum connected to one of the input and output members for rotation therewith and a pole member connected to the other of the input and output members for rotation therewith. The inductor drum is supported only at one end thereof by the one member. The pole member includes first and second annular sets of projections thereon with the projections of the first set having one polarity and the projections of the second set having a polarity opposite the one polarity when the coil is energized. The annular sets of projections are located between the annular coil and the inductor drum. When the coil is energized a flux path is established through the field member, through the first set of annular projections, through the inductor drum, through the second set of annular projections and back to the field member to operatively connect the input and output members. The present construction produces a reliable coupling having a torque transmitting capacity which is generally greater than the torque transmitting capacity of other similar sized couplings.
Inventors
- 👤 R Jaeschke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:06
CPC Classifications
H; H02; H02K; H02K49/00; H02K49/02; H02K49/04; H02K49/043
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
346 words
An electromagnetic coupling comprising a housing, rotatably supported input and output members mounted in a coaxial relationship relative to each other in said housing, a stationary electrically energizable annular coil disposed in said housing, a field member having a unitary construction for rigidly supporting said coil in said housing and being formed from an inductive material, a single support inductor drum member operatively connected with one of said input and output members for rotation therewith, said inductor drum member including a cylindrical portion disposed coaxial to said input and output members and a support portion extending in a subsTantially radial direction from said cylindrical portion, said support portion being connected to said one member and being connected to said cylindrical portion at one end of said cylindrical portion for supporting said cylindrical portion for rotation with said one member, a pole member connected to the other of said input and output members for rotation therewith, said pole member including first and second annular sets of spaced apart aligned noninterdigitated projections thereon, said projections of said first set having a first polarity when said coil is energized and said projections of said second set having a second polarity opposite said first polarity when said coil is energized, said first and second annular sets of projections being interposed between said cylindrical portion of said inductor drum and said annular coil, said coil when energized establishing a flux path which sequentially passes from said field member, through said first annular set of projections, from said first annular set of projections, through said cylindrical portion of said inductor drum and from said cylindrical portion of such inductor drum through said second annular set of projections back to said field member to operatively connect said input and output members, said first and second annular sets of projections on said pole member cooperating with said cylindrical portion of said inductor drum to intensify the flux path between said first and second projection and said inductor drum to provide increased torque under high slip conditions between said inductor drum and said pole member.
Claim 2
Dependent Claim
346 words
An electromagnetic coupling comprising a housing, rotatably supported input and output members mounted in a coaxial relationship relative to each other in said housing, a stationary electrically energizable annular coil disposed in said housing, a field member having a unitary construction for rigidly supporting said coil in said housing and being formed from an inductive material, a single support inductor drum member operatively connected with one of said input and output members for rotation therewith, said inductor drum member including a cylindrical portion disposed coaxial to said input and output members and a support portion extending in a subsTantially radial direction from said cylindrical portion, said support portion being connected to said one member and being connected to said cylindrical portion at one end of said cylindrical portion for supporting said cylindrical portion for rotation with said one member, a pole member connected to the other of said input and output members for rotation therewith, said pole member including first and second annular sets of spaced apart aligned noninterdigitated projections thereon, said projections of said first set having a first polarity when said coil is energized and said projections of said second set having a second polarity opposite said first polarity when said coil is energized, said first and second annular sets of projections being interposed between said cylindrical portion of said inductor drum and said annular coil, said coil when energized establishing a flux path which sequentially passes from said field member, through said first annular set of projections, from said first annular set of projections, through said cylindrical portion of said inductor drum and from said cylindrical portion of such inductor drum through said second annular set of projections back to said field member to operatively connect said input and output members, said first and second annular sets of projections on said pole member cooperating with said cylindrical portion of said inductor drum to intensify the flux path between said first and second projection and said inductor drum to provide increased torque under high slip conditions between said inductor drum and said pole member.
Claim 3
Dependent Claim
44 words
An electromagnetic coupling as defined in claim 1 wherein said pole member further includes an annular insulating member disposed between said first and second annular sets of projections for magnetically insulating said first annular set of projections from said second annular set of projections.
Claim 4
Dependent Claim
42 words
An electromagnetic coupling as defined in claim 2 wherein said projections of each of said first and second annular sets of projections are integrally formed from a single conductive member and extend in a radial direction from said input and output members.
Claim 5
Dependent Claim
89 words
An electromagnetic coupling as defined in claim 3 wherein said input member includes a first bearing sleeve disposed at one end thereof, said pole member includes a second bearing sleeve attached thereto, and further including a plurality of cylindrical bearings disposed between said first and second bearing sleeves, said first and second bearing sleeves and said cylindrical bearings cooperating to form a bearing assembly which supports said input and output members in a coaxial relationship within said housing and provides for relative rotation between said input and output members.
Claim 6
Dependent Claim
44 words
An electromagnetic coupling as defined in claim 3 wherein said pole member includes an annular cavity therein and said annular coil is supported by said field member in said annular cavity, said annular cavity enabling said pole member to rotate about said annular coil.
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) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |