US3204945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid spring
Assignee: Tayco Developments Inc
•
Filing: 1961-12-18
•
Granted: 1965-09-07
•
Expires: 1981-12-18
Abstract
No abstract record available.
Inventors
- 👤 Paul H Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:22
CPC Classifications
F; F16; F16F; F16F5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A FLUID SPRING COMPRISING A HOLLOW BODY FORMING A CHAMBER AND HAVING A BORE THROUGH ONE WALL THEEOF IN WHICH BORE A PISTON IS SLIDINGLY FITTED TO BE MOVABLE BY IMPOSED PRESSURES INTO AND OUT OF SAID CHAMBER WHEREBY THE MOVEMENT OF SAID PISTON VARY THE AVAILABLE VOLUME FOR FLUID OCCUPANCY OF SAID CHAMBER, AND A FLUID FILLING THE CHAMBER AND THEREIN SUBJECT TO VARYING INTRUSIONS BY THE PISTON AND CONSEQUENT DIVERSE COMPRESSIONS, WHICH FLUID FREEZES BELOW 65*F., HAS A CRITCIAL TEMPERATURE ABOVE SURE BELOW ABOUT 68* F., HAS A CRITICAL TEMPERATURE ABOVE ABOUT 90* F., AND IS CONVERTIBLE COMPLETELY TO ITS LIQUID PHASE AT A TEMPERATURE BETWEEN 65*F. AND THE CRITICAL TEMPERATURE OF SAID FLUID BY AN IMPOSED PRESSURE WHICH EXCEEDS THE SATURATED VAPOR PRESSURE OF THE SAID FLUID AT THE TEMPERATURE AT WHICH THE SAID PRESSURE IS IMPOSED.
Claim 2
Dependent Claim
140 words
A FLUID SPRING COMPRISING A HOLLOW BODY FORMING A CHAMBER AND HAVING A BORE THROUGH ONE WALL THEEOF IN WHICH BORE A PISTON IS SLIDINGLY FITTED TO BE MOVABLE BY IMPOSED PRESSURES INTO AND OUT OF SAID CHAMBER WHEREBY THE MOVEMENT OF SAID PISTON VARY THE AVAILABLE VOLUME FOR FLUID OCCUPANCY OF SAID CHAMBER, AND A FLUID FILLING THE CHAMBER AND THEREIN SUBJECT TO VARYING INTRUSIONS BY THE PISTON AND CONSEQUENT DIVERSE COMPRESSIONS, WHICH FLUID FREEZES BELOW 65*F., HAS A CRITCIAL TEMPERATURE ABOVE SURE BELOW ABOUT 68* F., HAS A CRITICAL TEMPERATURE ABOVE ABOUT 90* F., AND IS CONVERTIBLE COMPLETELY TO ITS LIQUID PHASE AT A TEMPERATURE BETWEEN 65*F. AND THE CRITICAL TEMPERATURE OF SAID FLUID BY AN IMPOSED PRESSURE WHICH EXCEEDS THE SATURATED VAPOR PRESSURE OF THE SAID FLUID AT THE TEMPERATURE AT WHICH THE SAID PRESSURE IS IMPOSED.
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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) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |