US3213986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction device
Assignee: Borg Warner Corp
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Filing: 1961-12-29
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Granted: 1965-10-26
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Expires: 1981-12-29
Abstract
No abstract record available.
Inventors
- 👤 Richard L Smirl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:46
CPC Classifications
F; F16; F16D; F16D13/00; F16D13/58; F16D13/70; F16D13/71; F16D13/60; F16D13/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A FRICTION DEVICE, COMPRISING: ROTATABLE DRIVING MEANS; ROTATABLE DRIVEN MEANS CARRYING A PAIR OF OPPOSITELY FACING FRICTION ELEMENTS EACH SAID FRICTION ELEMENT HAVING AN INSULATING CHARACTER GREATER THAN SAID DRIVING OR DRIVEN MEANS; PRESSURE PLATE MEANS DRIVINGLY CONNECTED TO SAID DRIVING MEANS AND COOPERATING WITH SAID DRIVING MEANS TO FRICTIONALLY CLAMP SAID DRIVEN MEANS THEREBETWEEN FOR CONJOINT ROTATION AND HAVING A LESSER MASS THAN SAID DRIVING MEANS; ACTUATING MEANS NORMALLY URGING SAID PRESSURE PLATE MEANS TOWARD SAID DRIVEN MEANS FOR PROVIDING ENGASGEMENT; AND RELEASE MEANS ADAPTED TO SELECTIVELY OVERCOME THE EFFECT OF SAID ACTUATING MEANS FOR DISENGAGING SAID DEVICE, SAID DEVICE BEING PARTICULARLY CHARACTERIZED IN THAT THE FRICTION ELEMENT ADJACENT SAID FLYWHEEL IS OF A HIGHER COEFFICIENT OF FRICTION THAN THE FRICTION ELEMENT ADJACENT SAID PRESSURE PLATE AND THAT DURING ENGAGEMENT A GREATER AMOUNT OF TORQUE WILL BE IMPARTED TO SAID DRIVEN MEANS BY SAID DRIVING MEANS THAN BY SAID PRESSURE PLATE MEANS.
Claim 2
Dependent Claim
153 words
A FRICTION DEVICE, COMPRISING: ROTATABLE DRIVING MEANS; ROTATABLE DRIVEN MEANS CARRYING A PAIR OF OPPOSITELY FACING FRICTION ELEMENTS EACH SAID FRICTION ELEMENT HAVING AN INSULATING CHARACTER GREATER THAN SAID DRIVING OR DRIVEN MEANS; PRESSURE PLATE MEANS DRIVINGLY CONNECTED TO SAID DRIVING MEANS AND COOPERATING WITH SAID DRIVING MEANS TO FRICTIONALLY CLAMP SAID DRIVEN MEANS THEREBETWEEN FOR CONJOINT ROTATION AND HAVING A LESSER MASS THAN SAID DRIVING MEANS; ACTUATING MEANS NORMALLY URGING SAID PRESSURE PLATE MEANS TOWARD SAID DRIVEN MEANS FOR PROVIDING ENGASGEMENT; AND RELEASE MEANS ADAPTED TO SELECTIVELY OVERCOME THE EFFECT OF SAID ACTUATING MEANS FOR DISENGAGING SAID DEVICE, SAID DEVICE BEING PARTICULARLY CHARACTERIZED IN THAT THE FRICTION ELEMENT ADJACENT SAID FLYWHEEL IS OF A HIGHER COEFFICIENT OF FRICTION THAN THE FRICTION ELEMENT ADJACENT SAID PRESSURE PLATE AND THAT DURING ENGAGEMENT A GREATER AMOUNT OF TORQUE WILL BE IMPARTED TO SAID DRIVEN MEANS BY SAID DRIVING MEANS THAN BY SAID PRESSURE PLATE MEANS.
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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |