US3777864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cooled magnetic clutch and brake
Assignee: Delmoran AG
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Filing: 1971-12-03
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Granted: 1973-12-11
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Expires: 1991-12-03
Abstract
Abstract A magnetic friction clutch wherein two disk-shaped armatures are movable axially of and rotate with the driven shaft. One of the armatures is adjacent to a flywheel which is rotated by the output shaft of an electric motor and the other armature is adjacent to a stationary or rotary braking member. Each armature has a ring-shaped nave which is mounted on the driven shaft and a ring-shaped rim which surrounds and is magnetically separated from the respective rim. Annular facings of magnetically nonconductive material are provided on each of the armatures between the respective nave and rim and their exposed surfaces are flush with pole faces provided on the corresponding rim and nave. Two windings are mounted in the space between the two armatures and one thereof is energizable to cause the facing and the pole faces of one armature to bear against the flywheel, the other winding being energizable to cause the facing and the pole faces of the armature to bear against the braking member. Channels in the braking member, naves of the armatures and the flywheel serve to convey streams of cooling air which are induced by annuli of blades on the flywheel. The material of those portions of each rim and nave which are adjacent to the respective pole faces exhibits the same resistance to wear as the material of the facings.
Inventors
- 👤 W Marti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:38
CPC Classifications
F; F16; F16D; F16D67/00; F16D67/02; F16D67/06; H; H02; H02K; H02K7/00; H02K7/10; H02K7/112; H02K7/1125
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
197 words
A structure of the character indicated, comprising coaxial driving and driven shafts; a flywheel secured to said driving shaft; a braking member axially spaced from said flywheel; first and second disks disposed intermediate said flywheel and said braking member and axially movable secured to and rotatable with said driven shaft, each of said disks comprising magnetically conductive concentric inner and outer ring-shaped portions, means for magnetically insulating said ring-shaped portions from each other and a friction generating facing between said inner and outer portions, the facing of said first disk being adjacent to said flywheel and the facing of said second disk being adjacent to said braking member, the facings of said first and second disks respectively comprising exposed surfaces adjacent to said flywheel and said braking member and said inner and outer portions of said disks having pole faces which are flush with the exposed surfaces of the respective facings, said facings and said inner and outer portions of said disks consisting of materials having at least substantially identical resistance to wear; and a pair of windings energizable to respectively urge the facings of said first and second disks against said flywheel and said braking member.
Claim 2
Dependent Claim
197 words
A structure of the character indicated, comprising coaxial driving and driven shafts; a flywheel secured to said driving shaft; a braking member axially spaced from said flywheel; first and second disks disposed intermediate said flywheel and said braking member and axially movable secured to and rotatable with said driven shaft, each of said disks comprising magnetically conductive concentric inner and outer ring-shaped portions, means for magnetically insulating said ring-shaped portions from each other and a friction generating facing between said inner and outer portions, the facing of said first disk being adjacent to said flywheel and the facing of said second disk being adjacent to said braking member, the facings of said first and second disks respectively comprising exposed surfaces adjacent to said flywheel and said braking member and said inner and outer portions of said disks having pole faces which are flush with the exposed surfaces of the respective facings, said facings and said inner and outer portions of said disks consisting of materials having at least substantially identical resistance to wear; and a pair of windings energizable to respectively urge the facings of said first and second disks against said flywheel and said braking member.
Claim 3
Dependent Claim
31 words
A structure as defined in claim 1, wherein said windings are annular windings which are coaxial with said shafts and further comprising stationary frame means mounting said windings between said disks.
Claim 4
Dependent Claim
12 words
A structure as defined in claim 1, wherein said facings are ring-shaped.
Claim 5
Dependent Claim
43 words
A structure as defined in claim 1, wherein said disks define an annular space the radially innermost portion of which is flanked by the inner portions of said disks and further comprising stationary frame means extending into said space and supporting said windings.
Claim 6
Dependent Claim
38 words
A structure as defined in claim 4, wherein said frame means comprises a ring-shaped portion of I-shaped profile and including inner and outer flange means which are respectively adjacent to said inner and outer portions of said disks.
Claim 7
Dependent Claim
33 words
A structure as defined in claim 5, wherein said inner flange means surrounds said inner portions of said disks and said other flange means is surrounded by said outer portions of said disks.
Claim 8
Dependent Claim
39 words
A structure as defined in claim 1, wherein said pole faces of said inner and outer portions of said first and second disks respectively engage said flywheel and said braking member in response to energization of the respective windings.
Claim 9
Dependent Claim
49 words
A struCture as defined in claim 1, wherein said flywheel, said braking member and said disks are provided with communicating channels and said flywheel comprises means for inducing the flow of at least one stream of cooling air through said channels in response to rotation of said driving shaft.
Claim 10
Dependent Claim
47 words
A structure as defined in claim 1, further comprising blade means provided on said flywheel for inducing the flow of at least one stream of cooling air through axially parallel channels provided in the inner portions of said disks in response to rotation of said driving shaft.
Claim 11
Dependent Claim
41 words
A structure as defined in claim 1, further comprising blade means provided on said flywheel to induce the flow of at least one cooling air stream along the outer portions of said disks in response to rotation of said driving shaft.
Claim 12
Dependent Claim
46 words
A structure as defined in claim 1, wherein said facings are respectively separated from said flywheel and said braking member by air gaps of predetermined width in deenergized condition of the respective windings, and further comprising adjusting means for varying the width of said air gaps.
Claim 13
Dependent Claim
38 words
A structure as defined in claim 1, wherein said means for magnetically insulating comprises plate-like annuli disposed between the the inner and outer ring-shaped portions of the respective disks, said facings being attached to the respective plate-like annuli.
Claim 14
Dependent Claim
15 words
A structure as defined in claim 12, wherein said plate-like annuli consist of light metal.
Claim 15
Dependent Claim
16 words
A structure as defined in claim 12, wherein said plate-like annuli consist of synthetic plastic material.
Claim 16
Dependent Claim
202 words
A structure of the character indicated, comprising coaxial driving and driven shafts; a flywheel secured to said driving shaft; a braking member axially spaced from said flywheel; first and second disks disposed intermediate said flywheel and said braking member and axially movably secured to and rotatable with said driven shaft, each of said disks comprising magnetically conductive concentric inner and outer ring-shaped portions, means for magnetically insulating said ring-shaped portions from each other and a friction generating facing between said inner and outer portions, the facing of said first disk being adjacent to said flywheel and the facing of said second disk being adjacent to said braking member; and a pair of windings energizable to respectively urge the facings of said first and second disks against said flywheel and said braking member, said inner and outer portions of said first and second disks comprising pole faces which respectively engage said flywheel and said braking member in response to energization of the respective windings, at least those parts of said inner and outer portions of at least one of said disks which are adjacent to the respective pole faces consisting of magnetically conductive sintered metal which is impregnated with a synthetic plastic lubricant.
Claim 17
Dependent Claim
202 words
A structure of the character indicated, comprising coaxial driving and driven shafts; a flywheel secured to said driving shaft; a braking member axially spaced from said flywheel; first and second disks disposed intermediate said flywheel and said braking member and axially movably secured to and rotatable with said driven shaft, each of said disks comprising magnetically conductive concentric inner and outer ring-shaped portions, means for magnetically insulating said ring-shaped portions from each other and a friction generating facing between said inner and outer portions, the facing of said first disk being adjacent to said flywheel and the facing of said second disk being adjacent to said braking member; and a pair of windings energizable to respectively urge the facings of said first and second disks against said flywheel and said braking member, said inner and outer portions of said first and second disks comprising pole faces which respectively engage said flywheel and said braking member in response to energization of the respective windings, at least those parts of said inner and outer portions of at least one of said disks which are adjacent to the respective pole faces consisting of magnetically conductive sintered metal which is impregnated with a synthetic plastic lubricant.
Claim 18
Dependent Claim
17 words
A structure as defined in claim 15, wherein said metal is iron and said lubricant is polytetrafluoroethylene.
Claim 19
Dependent Claim
151 words
A structure of the character indicated, comprising coaxial driving and driven shafts; a flywheel secured to said driving shaft; a braking member axially spaced from said flywheel; first and second disks disposed intermediate said flywheel and said braking member and axially movably secured to and rotatable with said driven shaft, each of said disks comprising magnetically conductive concentric inner and outer ring-shaped portions, means for magnetically insulating said ring-shaped portions from each other and a friction generating facing between said inner and outer portions, each of said facings consisting of a magnetically nonconductive sintered metal which is impregnated with a synthetic plastic lubricant, the facing of said first disk being adjacent to said flywheel and the facing of said second disk being adjacent to said braking member; and a pair of windings energizable to respectively urge the facings of said first and second disks against said flywheel and said braking member.
Claim 20
Dependent Claim
151 words
A structure of the character indicated, comprising coaxial driving and driven shafts; a flywheel secured to said driving shaft; a braking member axially spaced from said flywheel; first and second disks disposed intermediate said flywheel and said braking member and axially movably secured to and rotatable with said driven shaft, each of said disks comprising magnetically conductive concentric inner and outer ring-shaped portions, means for magnetically insulating said ring-shaped portions from each other and a friction generating facing between said inner and outer portions, each of said facings consisting of a magnetically nonconductive sintered metal which is impregnated with a synthetic plastic lubricant, the facing of said first disk being adjacent to said flywheel and the facing of said second disk being adjacent to said braking member; and a pair of windings energizable to respectively urge the facings of said first and second disks against said flywheel and said braking member.
Claim 21
Dependent Claim
17 words
A structure aS defined in claim 17, wherein said metal is bronze and said lubricant is polytetrafluoroethylene.
Claim 22
Dependent Claim
229 words
A structure of the character indicated, comprising a housing; coaxial driving and driven shafts; a flywheel located in said housing and secured to said driving shaft; a braking member located in said housing and axially spaced from said flywheel, said housing comprising a first annular portion supporting said flywheel and said driving shaft and a second annular portion supporting said driven shaft; first and second disks in said housing, said disks being disposed intermediate said flywheel and said braking member and being axially movably secured to and rotatable with said driven shaft, each of said disks comprising magnetically conductive concentric inner and outer ring-shaped portions, means for magnetically insulating said ring-shaped portions from each other and a friction generating facing between said inner and outer portions, the facing of said first disk being adjacent to said flywheel and the facing of said second disk being adjacent to said braking member; a pair of windings energizable to respectively urge the facings of said first and second disks against said flywheel and said braking member, said facings being respectively separated from said flywheel and said braking member by air gaps of predetermined width in deenergized condition of the respective windings; and adjusting means for varying the width of said air gaps, said adjusting means comprising at least one insert removably interposed between said first and second annular portions of said housing.
Claim 23
Dependent Claim
229 words
A structure of the character indicated, comprising a housing; coaxial driving and driven shafts; a flywheel located in said housing and secured to said driving shaft; a braking member located in said housing and axially spaced from said flywheel, said housing comprising a first annular portion supporting said flywheel and said driving shaft and a second annular portion supporting said driven shaft; first and second disks in said housing, said disks being disposed intermediate said flywheel and said braking member and being axially movably secured to and rotatable with said driven shaft, each of said disks comprising magnetically conductive concentric inner and outer ring-shaped portions, means for magnetically insulating said ring-shaped portions from each other and a friction generating facing between said inner and outer portions, the facing of said first disk being adjacent to said flywheel and the facing of said second disk being adjacent to said braking member; a pair of windings energizable to respectively urge the facings of said first and second disks against said flywheel and said braking member, said facings being respectively separated from said flywheel and said braking member by air gaps of predetermined width in deenergized condition of the respective windings; and adjusting means for varying the width of said air gaps, said adjusting means comprising at least one insert removably interposed between said first and second annular portions of said housing.
Claim 24
Dependent Claim
223 words
A structure of the character indicated, comprising a housing; coaxial driving and driven shafts; a flywheel located in said housing and secured to said drive shaft; a braking member located in said housing and axially spaced from said flywheel; first and second disks in said housing, said disks being disposed intermediate said flywheel and said braking member and being axially movably secured to and rotatable with said driven shaft, each of said disks comprising magnetically conductive concentric inner and outer ring-shaped portions, means for magnetically insulating said ring-shaped portions from each other and a friction generating facing between said inner and outer portions, the facing of said first disk being adjacent to said flywheel and the facing of said second disk being adjacent to said braking member, said housing comprising a first annular portion supporting said braking member and a second annular portion supporting said second disk; a pair of windings energizable to respectively urge the facings of said first and second disks against said flywheel and said braking member, said facings being respectively separated from said flywheel and said braking member by air gaps of predetermined width in deenergized condition of the respective windings; and adjusting means for varying the width of said air gaps, said adjusting means comprising at least one insert removably received between said annular portions of said housing.
Claim 25
Dependent Claim
223 words
A structure of the character indicated, comprising a housing; coaxial driving and driven shafts; a flywheel located in said housing and secured to said drive shaft; a braking member located in said housing and axially spaced from said flywheel; first and second disks in said housing, said disks being disposed intermediate said flywheel and said braking member and being axially movably secured to and rotatable with said driven shaft, each of said disks comprising magnetically conductive concentric inner and outer ring-shaped portions, means for magnetically insulating said ring-shaped portions from each other and a friction generating facing between said inner and outer portions, the facing of said first disk being adjacent to said flywheel and the facing of said second disk being adjacent to said braking member, said housing comprising a first annular portion supporting said braking member and a second annular portion supporting said second disk; a pair of windings energizable to respectively urge the facings of said first and second disks against said flywheel and said braking member, said facings being respectively separated from said flywheel and said braking member by air gaps of predetermined width in deenergized condition of the respective windings; and adjusting means for varying the width of said air gaps, said adjusting means comprising at least one insert removably received between said annular portions of said housing.
Claim 26
Dependent Claim
198 words
A structure of the character indicated, comprising coaxial driving and driven shafts; a flywheel secured to said driving shaft; a braking member axially spaced from said flywheel; first and second disks disposed intermediate said flywheel and said braking member and axially movably secured to and rotatable with said driven shaft, each of said disks comprising magnetically conductive concentric axially extending inner and outer ring-shaped portions and said inner portions of said disks being provided with channels, means for magnetically insulating said ring-shaped portions from each other and a friction generating facing between said inner and outer portions, the facing of said first disk being adjacent to said flywheel and the facing of said second disk being adjacent to said braking member; a pair of windings energizable to respectively urge the facings of said first and second disks against said flywheel and said braking member; and means including first and second blade means pRovided on said flywheel and respectively arranged to induce the flow of at least one first cooling air stream axially along said outer ring-shaped portions of said disks and at least one second cooling air stream through said channels of said inner portions of said disks.
Claim 27
Dependent Claim
198 words
A structure of the character indicated, comprising coaxial driving and driven shafts; a flywheel secured to said driving shaft; a braking member axially spaced from said flywheel; first and second disks disposed intermediate said flywheel and said braking member and axially movably secured to and rotatable with said driven shaft, each of said disks comprising magnetically conductive concentric axially extending inner and outer ring-shaped portions and said inner portions of said disks being provided with channels, means for magnetically insulating said ring-shaped portions from each other and a friction generating facing between said inner and outer portions, the facing of said first disk being adjacent to said flywheel and the facing of said second disk being adjacent to said braking member; a pair of windings energizable to respectively urge the facings of said first and second disks against said flywheel and said braking member; and means including first and second blade means pRovided on said flywheel and respectively arranged to induce the flow of at least one first cooling air stream axially along said outer ring-shaped portions of said disks and at least one second cooling air stream through said channels of said inner portions of said disks.
Claim 28
Dependent Claim
44 words
A structure as defined in claim 21, wherein said flywheel has a first side facing said first disk and a second side opposite said first side, said first and second blade means being respectively provided at said first and second sides of said flywheel.
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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |