US3390696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control devices
Assignee: Individual
•
Filing: 1965-11-18
•
Granted: 1968-07-02
•
Expires: 1985-11-18
Abstract
No abstract record available.
Inventors
- 👤 Dawson Joseph Carl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:18
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/14; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7783
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
186 words
A CHECK VALVE FOR BLOCKING A FLUID LINE WHEN THE FLUID THEREIN IS SUBJECTED TO BACK PRESSURES OF EXTREMELY SMALL MAGNITUDE: SAID CHECK VALVE COMPRISING A BODY HAVING AN INLET PORT, AN OUTLET PORT, AND AN INTERNAL CAVITY; A FLEXIBLE CONTINUOUS UNOBSTRUCTED DIAPHRAGM EXTENDING ACROSS THE CAVITY WHEREBY THE CAVITY IS DIVIDED INTO FIRST AND SECOND CHAMBERS; AND A BOSS SECURED TO THE BODY AND PROJECTING INWARDLY THROUGH THE FIRST CHAMBER WHERE IT TERMINATES IN A SUBSTANTIALLY PLANAR SEATING FACE LOCATED PARALLEL AND IN CLOSE PROXIMITY TO THE DIAPHRAGM; THE BODY BEING PROVIDED WITH A FIRST PASSAGE INTERCONNECTING THE INLET PORT AND FIRST CHAMBER, A SECOND PASSAGE WHICH COMMUNICATES WITH THE OUTLET PORT AT ONE END AND AT ITS OTHER END TERMINATES AT THE SEATING FACE OF THE BOSS IN THE FORMATION OF AN ORIFICE, AND A THIRD PASSAGE FOR ESTABLISHING COMMUNICATION BETWEEN THE OUTLET PORT AND THE SECOND CHAMBER; THE DIAPHRAGM BEING ADAPTED TO FLEX AWAY FROM THE SEATING FACE SO AS TO REDUCE THE VOLUME OF THE SECOND CHAMBER WHEN THE PRESSURE AT THE INLET PORT EXCEEDS THE PRESSURE AT THE OUTLET PORT WHEREBY
Claim 2
Dependent Claim
186 words
A CHECK VALVE FOR BLOCKING A FLUID LINE WHEN THE FLUID THEREIN IS SUBJECTED TO BACK PRESSURES OF EXTREMELY SMALL MAGNITUDE: SAID CHECK VALVE COMPRISING A BODY HAVING AN INLET PORT, AN OUTLET PORT, AND AN INTERNAL CAVITY; A FLEXIBLE CONTINUOUS UNOBSTRUCTED DIAPHRAGM EXTENDING ACROSS THE CAVITY WHEREBY THE CAVITY IS DIVIDED INTO FIRST AND SECOND CHAMBERS; AND A BOSS SECURED TO THE BODY AND PROJECTING INWARDLY THROUGH THE FIRST CHAMBER WHERE IT TERMINATES IN A SUBSTANTIALLY PLANAR SEATING FACE LOCATED PARALLEL AND IN CLOSE PROXIMITY TO THE DIAPHRAGM; THE BODY BEING PROVIDED WITH A FIRST PASSAGE INTERCONNECTING THE INLET PORT AND FIRST CHAMBER, A SECOND PASSAGE WHICH COMMUNICATES WITH THE OUTLET PORT AT ONE END AND AT ITS OTHER END TERMINATES AT THE SEATING FACE OF THE BOSS IN THE FORMATION OF AN ORIFICE, AND A THIRD PASSAGE FOR ESTABLISHING COMMUNICATION BETWEEN THE OUTLET PORT AND THE SECOND CHAMBER; THE DIAPHRAGM BEING ADAPTED TO FLEX AWAY FROM THE SEATING FACE SO AS TO REDUCE THE VOLUME OF THE SECOND CHAMBER WHEN THE PRESSURE AT THE INLET PORT EXCEEDS THE PRESSURE AT THE OUTLET PORT WHEREBY
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) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |