Patent US3586145A successfully refreshed from Google Patents.
US3586145A
Expired / Lapsed
US
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Electromagnetic clutch having stacked armature disks
Assignee: ANACOMP Inc 11550 NORTH MERIDAN STREET CARMEL INDIANA 46032 A CORP OF INDIANA
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Filing: 1969-08-28
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Granted: 1971-06-22
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Expires: 1989-08-28
Abstract
Abstract A method to substantially eliminate audible noise in electromagnetic shaft coupling devices is disclosed which utilizes an armature assembly comprising a plurality of thin armature discs which lower the resonant frequency, provide frictional damping, and make the armature discs sufficiently flexible to conform to the mating surface.
Inventors
- 👤 Omar Leo Cunningham Jr
- 👤 Howard N Saxton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:34
CPC Classifications
F; F16; F16D; F16D27/00; F16D27/10; F16D27/108; F16D27/112
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
126 words
An electromagnetic clutch assembly comprising: a. a rotatable shaft; b. an armature assembly consisting of from two to eight armature discs of magnetic material in a stacked, surface contact, arrangement; c. means for supporting said armature assembly on said shaft to allow sliding of said assembly along the axis of said shaft while sUbstantially preventing movement around the axis of said shaft; d. a rotor assembly located adjacent to said armature assembly for coaxial rotation with said shaft; said rotor having a quantity of frictional material embedded in the surface thereof adjacent said armature assembly; and e. electromagnetic control means to slide said armature along said shaft into pressure engagement with said frictional material, whereby said armature assembly is coupled to said rotor for rotation therewith.
Claim 2
Dependent Claim
126 words
An electromagnetic clutch assembly comprising: a. a rotatable shaft; b. an armature assembly consisting of from two to eight armature discs of magnetic material in a stacked, surface contact, arrangement; c. means for supporting said armature assembly on said shaft to allow sliding of said assembly along the axis of said shaft while sUbstantially preventing movement around the axis of said shaft; d. a rotor assembly located adjacent to said armature assembly for coaxial rotation with said shaft; said rotor having a quantity of frictional material embedded in the surface thereof adjacent said armature assembly; and e. electromagnetic control means to slide said armature along said shaft into pressure engagement with said frictional material, whereby said armature assembly is coupled to said rotor for rotation therewith.
Claim 3
Dependent Claim
63 words
An electromagnetic clutch assembly as recited in claim 1 wherein said electromagnetic control means comprises: a coil of wire; b. means to control current flow through said coil of wire; and c. annular magnetic material with an annular channel for said coil of wire whereby a magnetic field is produced in said annular magnetic material when current flows through said coil of wire.
Claim 4
Dependent Claim
29 words
An electromagnetic clutch assembly as recited in claim 1 wherein said armature discs are each at least about 0.010 inch thick and not greater than about 0.070 inch thick.
Claim 5
Dependent Claim
26 words
An electromagnetic clutch assembly as recited in claim 1 wherein said armature discs are each about 0.015 inch thick and consisting essentially of steel C 1010.
Claim 6
Dependent Claim
28 words
An electromagnetic clutch assembly as recited in claim 1 wherein said armature assembly comprises two substantially annular armature discs and said discs each being about 0.015 inch thick.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |