Patent US3241642A successfully refreshed from Google Patents.
US3241642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant output speed coupling
Assignee: Individual
•
Filing: 1960-12-27
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Granted: 1966-03-22
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Expires: 1980-12-27
Abstract
No abstract record available.
Inventors
- 👤 William L King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:10
CPC Classifications
F; F16; F16D; F16D35/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A COUPLING COMPRISING A DRIVING ROTOR ELEMENT, A ROTARY DRIVEN ELEMENT, AND A VISCOUS LIQUID BETWEEN THEM, THE ELEMENTS BEING MOUNTED FOR ROTATION ABOUT A COMMON AXIS; THE TWO ELEMENTS HAVING GENERALLY PARALLEL, FACING SURFACES, THE SURFACES BEING CLOSELY SPACED AND THE VISCOSITY OF THE LIQUID BEING SUFFICIENT, SO THAT WHEN THE LIQUID OCCUPIES THE SPACE BETWEEN THE SURFACES, ROTATION OF THE DRIVING ELEMENT WILL CAUSE ROTATION OF THE DRIVEN ELEMENT; THE DRIVEN ELEMENT HAVING A RELIEF SPACE OUTWARD BEYOND THE RIM OF THE DRIVING ELEMENT AND COMMUNICATING WITH THE SPACE BETWEEN THE SURFACES, MEANS IN THE RELIEF SPACE MAINTAINING THE SPACE SMALL SO AS TO MAINTAIN LIQUID BETWEEN THE FACING SURFACES DURING THE START AND A LOW SPEEDS OF THE DRIVEN ELEMENT; SAID MEANS BEING RESISTINGLY YIELDABLE AT A CRITICAL SPEED TO PERMIT LIQUID TO ESCAPE FROM THE SURFACES; THE LIQUID BEING ONE THAT BREAKS DOWN UNDER EXCESSIVE SHEAR LOADS, SO THAT
Claim 2
Dependent Claim
153 words
A COUPLING COMPRISING A DRIVING ROTOR ELEMENT, A ROTARY DRIVEN ELEMENT, AND A VISCOUS LIQUID BETWEEN THEM, THE ELEMENTS BEING MOUNTED FOR ROTATION ABOUT A COMMON AXIS; THE TWO ELEMENTS HAVING GENERALLY PARALLEL, FACING SURFACES, THE SURFACES BEING CLOSELY SPACED AND THE VISCOSITY OF THE LIQUID BEING SUFFICIENT, SO THAT WHEN THE LIQUID OCCUPIES THE SPACE BETWEEN THE SURFACES, ROTATION OF THE DRIVING ELEMENT WILL CAUSE ROTATION OF THE DRIVEN ELEMENT; THE DRIVEN ELEMENT HAVING A RELIEF SPACE OUTWARD BEYOND THE RIM OF THE DRIVING ELEMENT AND COMMUNICATING WITH THE SPACE BETWEEN THE SURFACES, MEANS IN THE RELIEF SPACE MAINTAINING THE SPACE SMALL SO AS TO MAINTAIN LIQUID BETWEEN THE FACING SURFACES DURING THE START AND A LOW SPEEDS OF THE DRIVEN ELEMENT; SAID MEANS BEING RESISTINGLY YIELDABLE AT A CRITICAL SPEED TO PERMIT LIQUID TO ESCAPE FROM THE SURFACES; THE LIQUID BEING ONE THAT BREAKS DOWN UNDER EXCESSIVE SHEAR LOADS, SO THAT
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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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |