US3189029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hypodermic injection apparatus
Assignee: Amalgamated Dental Co Ltd
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Filing: 1961-07-27
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Granted: 1965-06-15
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Expires: 1981-07-27
Abstract
No abstract record available.
Inventors
- 👤 Stephens Richard Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:15
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/30; A61M5/20; A61M5/2053; A61M5/31; A61M5/32; A61M5/34; A61M2005/341
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A JET INJECTOR COMPRISING A FLUID-TIGHT CYLINDER PROVIDED WITH A CONNECTION FOR THE ADMISSION OF PRESSURIZED FLUID THERETO, A PISTON SLIDABLY MOUNTED WITHIN SAID CYLINDER FOR AXIAL MOVEMENT THEREIN UNDER THE ACTION OF THE PRESSURIZED FLUID, A PLUNGER MOUNTED FOR AXIAL MOVEMENT WITH SAID PISTON, SAID PISTON HAVING A SUBSTANTIALLY LARGER CROSS-SECTIONAL AREA THAN SAID PLUNGER, A HOLDER FOR LIQUID TO BE INJECTED SO MOUNTED WITH RESPECT TO SAID CYLINDER THAT ON AXIAL MOVEMENT OF THE PISTON AND PLUNGER UNDER THE ACTION OF THE PRESSURIZED FLUID, THE PLUNGER MOVES INWARDLY OF SAID HOLDER FOR EXPELLING LIQUID THEREFROM AND A NOZZLE PORTION PROVIDED WITH A FINE JET OPERABLY CONNECTED TO THE HOLDER FOR TRANSMITTING LIQUID EXPELLED FROM THE HOLDER BY THE PLUNGER.
Claim 2
Dependent Claim
121 words
A JET INJECTOR COMPRISING A FLUID-TIGHT CYLINDER PROVIDED WITH A CONNECTION FOR THE ADMISSION OF PRESSURIZED FLUID THERETO, A PISTON SLIDABLY MOUNTED WITHIN SAID CYLINDER FOR AXIAL MOVEMENT THEREIN UNDER THE ACTION OF THE PRESSURIZED FLUID, A PLUNGER MOUNTED FOR AXIAL MOVEMENT WITH SAID PISTON, SAID PISTON HAVING A SUBSTANTIALLY LARGER CROSS-SECTIONAL AREA THAN SAID PLUNGER, A HOLDER FOR LIQUID TO BE INJECTED SO MOUNTED WITH RESPECT TO SAID CYLINDER THAT ON AXIAL MOVEMENT OF THE PISTON AND PLUNGER UNDER THE ACTION OF THE PRESSURIZED FLUID, THE PLUNGER MOVES INWARDLY OF SAID HOLDER FOR EXPELLING LIQUID THEREFROM AND A NOZZLE PORTION PROVIDED WITH A FINE JET OPERABLY CONNECTED TO THE HOLDER FOR TRANSMITTING LIQUID EXPELLED FROM THE HOLDER BY THE PLUNGER.
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) | 1968-06-14 | 1968-12-14 | 1969-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-14 | 1972-12-14 | 1973-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-14 | 1976-12-14 | 1977-06-15 | $7700.00 | Window Closed / Lapsed |