US3789966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-adjusting electromagnetic disc clutch
Assignee: Bendix Corp
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Filing: 1971-03-31
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Granted: 1974-02-05
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Expires: 1991-03-31
Abstract
Abstract An electromagnetic clutch with wear compensating means having two sets of co-acting friction discs adapted for releasably coupling a driving and driven rotary component. When the clutch is energized, the armature, which is not in the drive train, contactively engages with the pole faces of the electromagnet causing the freely mounted armature to rotate with the driving member; an adjusting ring which is slidably splined to the driven rotary component and advanceably threaded to the armature for relative rotation therewith, thereby applies the necessary engagement pressure to the friction disc assembly causing torque to be transmitted from the driving to the driven rotary component through the disc assembly. Any lost motion occasioned by wear of the friction discs is automatically taken up by the screw-action of the adjusting ring upon the armature; thus, the desired disc engagement pressure and the electromagnetic engaging force are held constant for the life of the clutch.
Inventors
- 👤 D Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:52
CPC Classifications
F; F16; F16D; F16D67/00; F16D67/02; F16D67/06; F16D27/00; F16D27/10; F16D55/00; F16D55/24; F16D55/26; F16D55/36; F16D2027/008; F16D2121/00; F16D2121/18; F16D2121/20; F16D2121/22
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
170 words
In combination with an electromagnetic clutch of the type having a friction disc assembly, which assembly includes two sets of co-acting friction discs adapted for releasably coupling a driving and a driven rotary component, and wherein pressure is exerted on said disc assembly by an armature''s response to a magnetic force created by electromagnetic actuating means, the improvement comprising: self-adjusting wear compensating means, said compensating means including an adjusting ring advanceably and concentrically threaded to said armature for relative rotation therewith, said ring being slidably adapted for axial movement along said driven rotary component for contactive engagement with said friction disc assembly, and said ring being secured to said driven rotary component for rotation therewith so that upon energization of said actuating means said armature is drawn into contactive engagement with said driving rotary component which in turn causes said adjusting ring to coact with said driven rotary component and its threaded connection with said armature, thereby axially advancing said adjusting ring into contactive engagement with said friction disc assembly.
Claim 2
Dependent Claim
170 words
In combination with an electromagnetic clutch of the type having a friction disc assembly, which assembly includes two sets of co-acting friction discs adapted for releasably coupling a driving and a driven rotary component, and wherein pressure is exerted on said disc assembly by an armature''s response to a magnetic force created by electromagnetic actuating means, the improvement comprising: self-adjusting wear compensating means, said compensating means including an adjusting ring advanceably and concentrically threaded to said armature for relative rotation therewith, said ring being slidably adapted for axial movement along said driven rotary component for contactive engagement with said friction disc assembly, and said ring being secured to said driven rotary component for rotation therewith so that upon energization of said actuating means said armature is drawn into contactive engagement with said driving rotary component which in turn causes said adjusting ring to coact with said driven rotary component and its threaded connection with said armature, thereby axially advancing said adjusting ring into contactive engagement with said friction disc assembly.
Claim 3
Dependent Claim
27 words
The combination as claimed in claim 1 including further detent means for retarding said armature from rotatably reversing its direction of rotation relative to said adjusting ring.
Claim 4
Dependent Claim
30 words
The combination as claimed in claim 1 wherein the electromagnetic actuating means comprises a magnet body disposed about said driving means and an electromagnetic winding disposed within said magnet body.
Claim 5
Dependent Claim
37 words
The combination as claimed in claim 1 including further, clutch disengagement means, said disengagement means including a spring loaded plunger adapted to exert an axial load on the armature opposite in direction to the electromagnetic engaging force.
Claim 6
Dependent Claim
44 words
The combination as claimed in claim 1 including further, clutch disengagement means, said disengagement means comprising magnetic means positioned in a plane parallel to said armature and adapted to exert a magnetic force on said armature opposite in direction to the electromagnetic engaging force.
Claim 7
Dependent Claim
34 words
The combination as claimed in claim 1 including further armature spacing means for providing a constant air gap between said armature and said driving rotary component when the clutch is in a disengaged position.
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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |