Patent US2677130A successfully refreshed from Google Patents.
Patent US3351087A successfully refreshed from Google Patents.
US3351087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for controlling the rate of flow of fluids
Assignee: Individual
•
Filing: 1965-03-23
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Granted: 1967-11-07
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Expires: 1985-03-23
Abstract
No abstract record available.
Inventors
- 👤 Welty Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:27
CPC Classifications
F; F16; F16K; F16K47/00; F16K47/02; G; G05; G05D; G05D7/00; G05D7/01; G05D7/0126; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7792
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
A DEVICE FOR PASSING A PERDETERMINED QUANTITY OF FULID PER UNIT OF TIME REGRADLESS OF VARIATIONS IN THE PRESSURE OF THE FLUID SOURCE COMPRISING: A HOUSING HAVING COAXIAL AND ADJACENT BORES THEREIN OF DIFFERENT DIAMETERS, A COMBINED VALVE PLURGER AND PISTON SLIDEABLY RECEIVED IN SAID BORES WITH THE PISTON IN THE LARGER OF SAID BORES, MEANS TO CONDUCT FLUID FROM THE SOURECE TO THE SIDE OF SAID PISTON WHICH IS TOWARD SAID PLUNGER, MEANS CLOSING OFF THE OUTER OPEN ENDS OF SAID BORES, AN ORIFICE IN SAID COMBINED VALVE PLUNGER AND PISTON OPERATIVE TO CONDUCT FLUID FROM SAID SOURCE TO A THRU-BORE IN AID PISTON AND PLUNGER WHEREBY FLUID COMING THROUGH SAID ORIFICE IS CONDUCTED TO THE OUTER END OF SAID PLUNGER AS WELL AS TO THE OTHER SIDE OF SAID PISTON, A VALVE HAVING A DISCHARGE PORT IN THE SIDE WALL OF SAID HOUSING AND A COOPERATING RECESS IN SAID PLUNGER COMMUNICATING WITH SAID THUR-BORE, AND RESILIENT YIELDABLE MEANS BIASING SAID PISTON AND PLUNGER ASSEMBLY AGAINST THE AXIAL FORCE EXERTED BY SAID PISTON BY REASON OF THE PRESSURE DROP THROUGH SAID ORIFICE.
Claim 2
Independent Claim
183 words
A DEVICE FOR PASSING A PERDETERMINED QUANTITY OF FULID PER UNIT OF TIME REGRADLESS OF VARIATIONS IN THE PRESSURE OF THE FLUID SOURCE COMPRISING: A HOUSING HAVING COAXIAL AND ADJACENT BORES THEREIN OF DIFFERENT DIAMETERS, A COMBINED VALVE PLURGER AND PISTON SLIDEABLY RECEIVED IN SAID BORES WITH THE PISTON IN THE LARGER OF SAID BORES, MEANS TO CONDUCT FLUID FROM THE SOURECE TO THE SIDE OF SAID PISTON WHICH IS TOWARD SAID PLUNGER, MEANS CLOSING OFF THE OUTER OPEN ENDS OF SAID BORES, AN ORIFICE IN SAID COMBINED VALVE PLUNGER AND PISTON OPERATIVE TO CONDUCT FLUID FROM SAID SOURCE TO A THRU-BORE IN AID PISTON AND PLUNGER WHEREBY FLUID COMING THROUGH SAID ORIFICE IS CONDUCTED TO THE OUTER END OF SAID PLUNGER AS WELL AS TO THE OTHER SIDE OF SAID PISTON, A VALVE HAVING A DISCHARGE PORT IN THE SIDE WALL OF SAID HOUSING AND A COOPERATING RECESS IN SAID PLUNGER COMMUNICATING WITH SAID THUR-BORE, AND RESILIENT YIELDABLE MEANS BIASING SAID PISTON AND PLUNGER ASSEMBLY AGAINST THE AXIAL FORCE EXERTED BY SAID PISTON BY REASON OF THE PRESSURE DROP THROUGH SAID ORIFICE.
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) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |