Patent US3090221A successfully refreshed from Google Patents.
US3090221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Test apparatus and hydraulic systems
Assignee: Individual
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Filing: 1960-11-14
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Granted: 1963-05-21
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Expires: 1980-11-14
Abstract
No abstract record available.
Inventors
- 👤 Kenneth W Cosby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:30
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/26; G01M3/28; G01M3/2807
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
229 words
A DEVICE FOR DETECTING A PRESSURE DROP IN ONE OF TWO CONDUITS, BOTH OF SAID CONDUITS CONTAINING PRESSURE FLUID, COMPRISING: HOUSING MEANS DEFINING AN ELONGATED, SUBSTANTIALLY CYLINDRICAL CHAMBER COMMUNICATING AT THE OPPOSITE ENDS THEREOF WITH THE TWO CONDUITS; A CYLINDRICAL, FLOATING PISTON DISPOSED WITHIN SAID CHAMBER FOR SLIDING MOVEMENT LENGTHWISE THEREOF, SAID PISTON HAVING A PASSAGEWAY EXTENDING THERETHROUGH AND COMMUNICATING AT ITS OPPOSITE ENDS WITH THE OPPOSITE ENDS OF SAID CHAMBER; NORMALLY CLOSED VALVE MEANS WITHIN SAID PASSAGEWAY, WHEREBY ONE END OF SAID CHAMBER IS NORMALLY SEALED FROM THE OTHER END THEREOF; FIRST ACTUATING MEANS LOCATED AT ONE END OF SAID CHAMBER FOR HOLDING SAID VALVE MEANS OPEN WHEN, AND ONLY WHEN, SAID PISTON IS CLOSELY ADJACENT SAID ONE END OF SAID CHAMBER, WHEREBY SAID FLUID CAN FLOW FROM THE OTHER END OF SAID CHAMBER THROUGH SAID PASSAGEWAY AND INTO SAID ONE END OF SAID CHAMBER; SECOND ACTUATING MEANS LOCATED AT THE OTHER END OF SAID CHAMBER FOR HOLDING SAID VALVE MEANS OPEN WHEN, AND ONLY WHEN, SAID PISTON IS CLOSELY ADJACENT SAID OTHER END OF SAID CHAMBER, WHEREBY SAID FLUID CAN FLOW FROM THE ONE END OF SAID CHAMBER THROUGH SAID PASSAGEWAY AND INTO SAID OTHER END OF SAID CHAMBER; AND INDICATOR MEANS RESPONSIVE TO SUBSTANTIAL MOVEMENT OF SAID PISTON LENGTHWISE OF SAID CHAMBER TO INDICATE A PRESSURE DIFFERENTIAL BETWEEN SAID CONDUITS WITHOUT OBSTRUCTING THE FLUID FLOW THEREBETWEEN.
Claim 2
Independent Claim
229 words
A DEVICE FOR DETECTING A PRESSURE DROP IN ONE OF TWO CONDUITS, BOTH OF SAID CONDUITS CONTAINING PRESSURE FLUID, COMPRISING: HOUSING MEANS DEFINING AN ELONGATED, SUBSTANTIALLY CYLINDRICAL CHAMBER COMMUNICATING AT THE OPPOSITE ENDS THEREOF WITH THE TWO CONDUITS; A CYLINDRICAL, FLOATING PISTON DISPOSED WITHIN SAID CHAMBER FOR SLIDING MOVEMENT LENGTHWISE THEREOF, SAID PISTON HAVING A PASSAGEWAY EXTENDING THERETHROUGH AND COMMUNICATING AT ITS OPPOSITE ENDS WITH THE OPPOSITE ENDS OF SAID CHAMBER; NORMALLY CLOSED VALVE MEANS WITHIN SAID PASSAGEWAY, WHEREBY ONE END OF SAID CHAMBER IS NORMALLY SEALED FROM THE OTHER END THEREOF; FIRST ACTUATING MEANS LOCATED AT ONE END OF SAID CHAMBER FOR HOLDING SAID VALVE MEANS OPEN WHEN, AND ONLY WHEN, SAID PISTON IS CLOSELY ADJACENT SAID ONE END OF SAID CHAMBER, WHEREBY SAID FLUID CAN FLOW FROM THE OTHER END OF SAID CHAMBER THROUGH SAID PASSAGEWAY AND INTO SAID ONE END OF SAID CHAMBER; SECOND ACTUATING MEANS LOCATED AT THE OTHER END OF SAID CHAMBER FOR HOLDING SAID VALVE MEANS OPEN WHEN, AND ONLY WHEN, SAID PISTON IS CLOSELY ADJACENT SAID OTHER END OF SAID CHAMBER, WHEREBY SAID FLUID CAN FLOW FROM THE ONE END OF SAID CHAMBER THROUGH SAID PASSAGEWAY AND INTO SAID OTHER END OF SAID CHAMBER; AND INDICATOR MEANS RESPONSIVE TO SUBSTANTIAL MOVEMENT OF SAID PISTON LENGTHWISE OF SAID CHAMBER TO INDICATE A PRESSURE DIFFERENTIAL BETWEEN SAID CONDUITS WITHOUT OBSTRUCTING THE FLUID FLOW THEREBETWEEN.
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) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |