US2714853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump for delivering small discrete quantities of liquid
Assignee: Shell Development Co
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Filing: 1952-12-27
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Granted: 1955-08-09
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Expires: 1972-12-27
Abstract
No abstract record available.
Inventors
- 👤 Johannes T M Schlamann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:24
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/0009; F04B43/0027; B; B65; B65B; B65B3/00; B65B3/003; F02; F02M; F02M59/00; F02M59/12; F02M59/14; F02M2700/00; F02M2700/13; F02M2700/1317; F02M2700/1323
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A PUMP FOR DELIVERING SMALL QUANTITIES OF LIQUID COMPRISING: A CHAMBERED PUMP CASING DEFINING A SUPPLY CHAMBER AND HAVING A WALL SECTION OF HIGHLY ELASTIC MATERIAL WITH APPRECIABLE THICKNESS, SAID WALL SECTION HAVING AN OPEN-ENDED CHAMBER EXTENDING THERETHROUGH FORMING AN EXPANSIBLE PUMP CHAMBER COMMUNICATING AT THE INNER END WITH SAID SUPPLY CHAMBER; A DISCHARGE DUCT CONNECTED TO THE OTHER END OF SAID PUMP CHAMBER; A DISCHARGE VALVE IN SAID DISCHARGE DUCT: MEANS FOR SUPPLYING LIQUID TO SAID SUPPLY CHAMBER; AND A RECIPROCABLE PLUNGER HAVING AN END ABUTMENT FACE IN SAID SUPPLY CHAMBER MOUNTED FOR MOVEMENT TOWARD SAID PUMP CHAMBER AND SHAPED TO CLOSE THE SAID INNER END OF SAID PUMP CHAMBER AND TO COMPRESS SAID WALL SECTION ELASTICALLY UPON ENGAGEMENT THEREWITH AND THEREBY TTO REDUCE THE VOLUME OF THE SAID PUMP CHAMBER.
Claim 2
Dependent Claim
132 words
A PUMP FOR DELIVERING SMALL QUANTITIES OF LIQUID COMPRISING: A CHAMBERED PUMP CASING DEFINING A SUPPLY CHAMBER AND HAVING A WALL SECTION OF HIGHLY ELASTIC MATERIAL WITH APPRECIABLE THICKNESS, SAID WALL SECTION HAVING AN OPEN-ENDED CHAMBER EXTENDING THERETHROUGH FORMING AN EXPANSIBLE PUMP CHAMBER COMMUNICATING AT THE INNER END WITH SAID SUPPLY CHAMBER; A DISCHARGE DUCT CONNECTED TO THE OTHER END OF SAID PUMP CHAMBER; A DISCHARGE VALVE IN SAID DISCHARGE DUCT: MEANS FOR SUPPLYING LIQUID TO SAID SUPPLY CHAMBER; AND A RECIPROCABLE PLUNGER HAVING AN END ABUTMENT FACE IN SAID SUPPLY CHAMBER MOUNTED FOR MOVEMENT TOWARD SAID PUMP CHAMBER AND SHAPED TO CLOSE THE SAID INNER END OF SAID PUMP CHAMBER AND TO COMPRESS SAID WALL SECTION ELASTICALLY UPON ENGAGEMENT THEREWITH AND THEREBY TTO REDUCE THE VOLUME OF THE SAID PUMP CHAMBER.
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) | 1958-08-08 | 1959-02-07 | 1959-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-08 | 1963-02-07 | 1963-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-08 | 1967-02-07 | 1967-08-09 | $7700.00 | Window Closed / Lapsed |