Patent US3205990A successfully refreshed from Google Patents.
US3205990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fast acting clutch-brake
Assignee: Potter Instrument Co Inc
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Filing: 1963-05-17
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Granted: 1965-09-14
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Expires: 1983-05-17
Abstract
No abstract record available.
Inventors
- 👤 George E Comstock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:04
CPC Classifications
F; F16; F16D; F16D27/00; F16D27/10; F16D27/108; F16D27/112; F16D2027/008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A VERY FAST ACTING CLUTCH COMPRISING, A FIRST SHAFT SUPPORTED FOR ROTATION, A ROTOR FIELD PLATE MOUNTED ON THE FIRST SHAFT FOR ROTATION THEREWITH, THE ROTOR FIEL PLATE INCLUDING AN ANNULAR FACE OF FRICTIONAL MATERIAL, A SECOND SHAFT SUPPORTED FOR ROTATION, AN ELECTOMAGNETICALLY ATTRACTABLE ARMATURE MOUNTED ON THE SECOND SHAFT FOR CONJOINT ROTATION THEREWITH BUT BEING AXIALLY DISPLACEABLE WITH RESPECT THERETO, SPRING MEANS URGING THE ARMATURE TOWARD THE FIELD PLATE FOR ENGAGEMENT THEREWITH, A COIL ASSEMBLY POSITIONED TO ESTABLISH AN ELECTROMAGNETIC FIELD TO ATTRACT THE ARMATURE INTO FRICTIONAL ENGAGEMENT WITH THE FIELD PLATE, AND MEANS TO SEPARATE THE ARMATURE FROM THE FIELD PLATE, WHEN DE-ENERGIZED, BY A VERY SMALL CLEARANCE, SAID LAST NAMED MEANS COMPRISING, MEANS FOR ESTABLISHING AN AIR CUSHION BETWEEN SAID FIELD PLATE ANS ARMATURE.
Claim 2
Dependent Claim
127 words
A VERY FAST ACTING CLUTCH COMPRISING, A FIRST SHAFT SUPPORTED FOR ROTATION, A ROTOR FIELD PLATE MOUNTED ON THE FIRST SHAFT FOR ROTATION THEREWITH, THE ROTOR FIEL PLATE INCLUDING AN ANNULAR FACE OF FRICTIONAL MATERIAL, A SECOND SHAFT SUPPORTED FOR ROTATION, AN ELECTOMAGNETICALLY ATTRACTABLE ARMATURE MOUNTED ON THE SECOND SHAFT FOR CONJOINT ROTATION THEREWITH BUT BEING AXIALLY DISPLACEABLE WITH RESPECT THERETO, SPRING MEANS URGING THE ARMATURE TOWARD THE FIELD PLATE FOR ENGAGEMENT THEREWITH, A COIL ASSEMBLY POSITIONED TO ESTABLISH AN ELECTROMAGNETIC FIELD TO ATTRACT THE ARMATURE INTO FRICTIONAL ENGAGEMENT WITH THE FIELD PLATE, AND MEANS TO SEPARATE THE ARMATURE FROM THE FIELD PLATE, WHEN DE-ENERGIZED, BY A VERY SMALL CLEARANCE, SAID LAST NAMED MEANS COMPRISING, MEANS FOR ESTABLISHING AN AIR CUSHION BETWEEN SAID FIELD PLATE ANS ARMATURE.
References Cited (Backward Citations)
US2695695A
Cited
US2956659A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |