Patent US4033438A successfully refreshed from Google Patents.
US4033438A
Expired / Lapsed
US
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Roller spline
Assignee: Rockford Dynatorq Inc
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Filing: 1976-02-26
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Granted: 1977-07-05
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Expires: 1996-02-26
Abstract
Abstract An electromagnetic friction coupling includes an armature assembly, a pole assembly and a coil energizable to effect engagement of the armature and pole assemblies. The armature assembly includes an armature plate and a hub member which are coupled together by means for compensating for misalignment between the armature plate and hub members. The hub member is adapted to be connected to a shaft for rotation therewith and the armature member is disposed coaxially of the hub member and is connected for rotation therewith. The hub member and armature plate include outer and inner surfaces, respectively, which include a plurality of substantially semicircular recesses disposed therein. Each of the recesses disposed on the armature plate and the complementary recesses on the hub member define a plurality of substantially cylindrical openings therebetween each of which is adapted to receive a rotatable cylindrical pin therein to couple the hub member and armature plate. The cylindrical pins are loosely disposed in the cylindrical openings to provide for angular and radial movement of the armature plate and hub member relative to each other while compensating for angular and radial misalignment of the hub member and armature plate. The cylindrical pins are free to rotate within the cylindrical openings to distribute the wear thereon evenly about the outer surface thereof and are deformable to provide for uniform loading while compensating for misalignment of the armature plate and hub member.
Inventors
- 👤 Howard E. Wiltsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:34
CPC Classifications
F; F16; F16D; F16D27/00; F16D27/02; F16D27/04; F16D27/06; H; H02; H02K; H02K49/00; H02K49/10; H02K49/104; F16D1/00; F16D1/06; F16D1/08; F16D1/0876; F16D2027/008; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7018; Y10T403/7021; Y10T403/7022
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
280 words
An electromagnetic coupling comprising an armature plate, a hub member disposed substantially concentric to said armature plate for supporting said armature plate for rotation therewith, a pole assembly, said pole assembly and armature plate having an engaged position establishing a driving relationship therebetween and a disengaged position, a coil energizable to effect engagement of said pole assembly and armature plate, roller coupling means for coupling said armature plate and hub member and compensating for misalignment therebetween, said hub member including an outer surface having a plurality of first arcuate recesses disposed therein, said armature plate including an inner surface having a plurality of second arcuate recesses disposed therein, said plurality of first and second arcuate recesses forming a plurality of sets of first and second complementary recesses, each of said plurality of sets of complementary recesses defining a substantially cylindrical opening between said outer surface of said hub and said inner surface of said armature plate, and said roller coupling means including a plurality of rotatable cylindrical pins, one of which is disposed in each of said cylindrical openings for coupling said armature plate and hub member together, said cylindrical pins having a diameter less than the diameter of said cylindrical openings to establish a diametric clearance between said cylindrical pins and said cylindrical openings which allows relative axial movement between said armature plate and hub member in a direction parallel to the axis of rotation of said armature plate and hub member and which compensates for misalignment therebetween, said cylindrical pins being deformable to enable said cylindrical pins to conform to the shape of said substantially cylindrical openings while compensating for misalignment of said armature plate and hub member.
Claim 2
Dependent Claim
280 words
An electromagnetic coupling comprising an armature plate, a hub member disposed substantially concentric to said armature plate for supporting said armature plate for rotation therewith, a pole assembly, said pole assembly and armature plate having an engaged position establishing a driving relationship therebetween and a disengaged position, a coil energizable to effect engagement of said pole assembly and armature plate, roller coupling means for coupling said armature plate and hub member and compensating for misalignment therebetween, said hub member including an outer surface having a plurality of first arcuate recesses disposed therein, said armature plate including an inner surface having a plurality of second arcuate recesses disposed therein, said plurality of first and second arcuate recesses forming a plurality of sets of first and second complementary recesses, each of said plurality of sets of complementary recesses defining a substantially cylindrical opening between said outer surface of said hub and said inner surface of said armature plate, and said roller coupling means including a plurality of rotatable cylindrical pins, one of which is disposed in each of said cylindrical openings for coupling said armature plate and hub member together, said cylindrical pins having a diameter less than the diameter of said cylindrical openings to establish a diametric clearance between said cylindrical pins and said cylindrical openings which allows relative axial movement between said armature plate and hub member in a direction parallel to the axis of rotation of said armature plate and hub member and which compensates for misalignment therebetween, said cylindrical pins being deformable to enable said cylindrical pins to conform to the shape of said substantially cylindrical openings while compensating for misalignment of said armature plate and hub member.
Claim 3
Dependent Claim
57 words
An electromagnetic coupling as defined in claim 1 wherein said cylindrical pins are formed from a softer material than from which said armature plate and hub member are formed to provide for wear of said cylindrical pins in preference to wear of said first and second arcuate recesses formed in said hub member and armature plate, respectively.
Claim 4
Dependent Claim
28 words
An electromagnetic coupling as defined in claim 1 wherein said outer surface of said hub member and said inner surface of said armature plate have a cylindrical configuration.
Claim 5
Dependent Claim
51 words
An electromagnetic coupling as defined in claim 1 wherein said diametric clearance between said cylindrical pins and said cylindrical openings is at least two thousandths (0.002) of an inch to enable the axis of rotation of said hub member to be skewed from the axis of rotation of said armature plate.
Claim 6
Dependent Claim
35 words
An electromagnetic coupling as defined in claim 4 wherein said diametric clearance allows said cylindrical pins to rotate relative to said cylindrical openings to distribute wear evenly about the outer surface of said cylindrical pins.
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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) | 1980-07-04 | 1981-01-03 | 1981-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-04 | 1985-01-03 | 1985-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-04 | 1989-01-03 | 1989-07-05 | $7700.00 | Window Closed / Lapsed |