US3207383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid powered, air eliminating dispenser of liquids
Assignee: PLASTIC MATERIALS Inc
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Filing: 1963-01-30
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Granted: 1965-09-21
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Expires: 1983-01-30
Abstract
No abstract record available.
Inventors
- 👤 Richard N Levake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:44
CPC Classifications
G; G01; G01F; G01F11/00; G01F11/02; G01F11/021; F; F16; F16N; F16N39/00; F16N39/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
DISPENSING APPARATUS COMPRISING A PUMP HOUSING PROVIDED WITH AN UPRIGHT CYLINDRICAL BORE; A PISTON SLIDABLY RECEIVED IN THE BORE FOR RECIPROCABLE MOVEMENT IN SUBSTANTIALLY SEALING ENGAGEMENT WITH THE HOUSING; A SOURCE OF SUPPLY FOR A LIQUID SUBSTANCE HAVING AIR ENTRAINED THEREIN; MEANS PROVIDING FOR DOWNWARDLY FLOW OF SAID LIQUID SUBSTANCE FROM SAID SUPPLY SOURCE INTO THE UPPER END OF SAID BORE UPON DOWNWARDLY MOVEMENT OF THE PISTON, INCLUDING MEANS TO PERMIT THE RETURN TO SAID SUPPLY SOURCE OF AIR SEPARATED FROM SAID SUBSTANCE; THE VOLUME OF THE SOURCE OF SUPPLY BEING LARGER THAN THE EFFECTIVE DISPLACEMENT OF THE PISTON. A HOLLOW ROD SECURED TO SAID PISTON PROVIDING FOR DOWNWARD FLOW OF SAID LIQUID SUBSTANCE FROM SAID BORE UPON UPWARD MOVEMENT OF THE PISTON AND FORCE MEANS OPERABLY ASSOCIATED WITH SAID PISTON TO EFFECT SELECTIVE RECIPROCATION THEREOF IN SAID HOUSING.
Claim 2
Dependent Claim
139 words
DISPENSING APPARATUS COMPRISING A PUMP HOUSING PROVIDED WITH AN UPRIGHT CYLINDRICAL BORE; A PISTON SLIDABLY RECEIVED IN THE BORE FOR RECIPROCABLE MOVEMENT IN SUBSTANTIALLY SEALING ENGAGEMENT WITH THE HOUSING; A SOURCE OF SUPPLY FOR A LIQUID SUBSTANCE HAVING AIR ENTRAINED THEREIN; MEANS PROVIDING FOR DOWNWARDLY FLOW OF SAID LIQUID SUBSTANCE FROM SAID SUPPLY SOURCE INTO THE UPPER END OF SAID BORE UPON DOWNWARDLY MOVEMENT OF THE PISTON, INCLUDING MEANS TO PERMIT THE RETURN TO SAID SUPPLY SOURCE OF AIR SEPARATED FROM SAID SUBSTANCE; THE VOLUME OF THE SOURCE OF SUPPLY BEING LARGER THAN THE EFFECTIVE DISPLACEMENT OF THE PISTON. A HOLLOW ROD SECURED TO SAID PISTON PROVIDING FOR DOWNWARD FLOW OF SAID LIQUID SUBSTANCE FROM SAID BORE UPON UPWARD MOVEMENT OF THE PISTON AND FORCE MEANS OPERABLY ASSOCIATED WITH SAID PISTON TO EFFECT SELECTIVE RECIPROCATION THEREOF IN SAID HOUSING.
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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |