US3169392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viscometer
Assignee: Individual
•
Filing: 1962-12-17
•
Granted: 1965-02-16
•
Expires: 1982-12-17
Abstract
No abstract record available.
Inventors
- 👤 William B Brookfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:50
CPC Classifications
G; G01; G01N; G01N11/00; G01N11/10; G01N11/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
IN A DEVICE FOR RESPONDING TO CHANGES IN THE VISCOSITY OF A LIQUID, A DRIVE SHAFT, A DRIVEN SHAFT, INCLUDING A MEMBER TO BE IMMERSED IN THE LIQUID TO BE SUBJECTED TO THE DRAG THEREOF, A CONNECTION BETWEEN SAID SHAFTS OPERABLE TO PERMIT LIMITED RELATIVE ROTATION THEREBETWEEN WHEN THE DRIVEN SHAFT TORQUE EXCEEDS A PREDETERMINED VALUE, A SPRING ONE END OF WHCIH IS CONNECTED TO SAID DRIVEN SHAFT, AND A CONNECTION BETWEEN THE OTHER END OF SAID SPRING AND SAID DRIVE SHAFT AND INCLUDING AN AIR CONDUIT PROVIDED WITH A VALVE PORT CARRIED BY SAID DRIVE SHAFT, AND A PORT CLOSING MEMBER CARRIED BY SAID OTHER SPRING END AND CLOSING SAID PORT UNTIL RELATIVE SHAFT MOVEMENT OCCURS.
Claim 2
Dependent Claim
117 words
IN A DEVICE FOR RESPONDING TO CHANGES IN THE VISCOSITY OF A LIQUID, A DRIVE SHAFT, A DRIVEN SHAFT, INCLUDING A MEMBER TO BE IMMERSED IN THE LIQUID TO BE SUBJECTED TO THE DRAG THEREOF, A CONNECTION BETWEEN SAID SHAFTS OPERABLE TO PERMIT LIMITED RELATIVE ROTATION THEREBETWEEN WHEN THE DRIVEN SHAFT TORQUE EXCEEDS A PREDETERMINED VALUE, A SPRING ONE END OF WHCIH IS CONNECTED TO SAID DRIVEN SHAFT, AND A CONNECTION BETWEEN THE OTHER END OF SAID SPRING AND SAID DRIVE SHAFT AND INCLUDING AN AIR CONDUIT PROVIDED WITH A VALVE PORT CARRIED BY SAID DRIVE SHAFT, AND A PORT CLOSING MEMBER CARRIED BY SAID OTHER SPRING END AND CLOSING SAID PORT UNTIL RELATIVE SHAFT MOVEMENT OCCURS.
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) | 1968-02-16 | 1968-08-17 | 1969-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-16 | 1972-08-17 | 1973-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-16 | 1976-08-17 | 1977-02-16 | $7700.00 | Window Closed / Lapsed |