Patent US3307548A successfully refreshed from Google Patents.
US3307548A
Expired / Lapsed
US
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Multiple capacity syringe
Assignee: ROSTRA ENGINEERED COMPONENTS Inc A CORP OF CT
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Filing: 1964-01-10
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Granted: 1967-03-07
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Expires: 1984-01-10
Abstract
No abstract record available.
Inventors
- 👤 Henry J Kachergis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:55
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/24; A61M2005/2403; A61M2005/2414
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A MULTIPLE CAPACITY INJECTION SYRINGE ADAPTED TO BE USED WITH AMPULES OF DIFFERENT LENGTHS COMPRISING (A) A BARREL OF SUFFICIENT LENGTH TO RECEIVE A LONG AMPULE AND HAVING MEANS AT ITS INNER END TO RETAIN AN AMPULE IN THE BARREL; (B) A HEAD MOUNTED AT THE OUTER END OF THE BARREL; (C) A PLUNGER ROD SLIDABLY MOUNTED IN THE BARREL HEAD HAVING MEANS AT ITS INNER END FOR ATTACHMENT TO THE AMPULE PISTON BY A RELATIVE TWISTING MOVEMENT IN ONE DIRECTION; AND (D) MEANS IN SAID HEAD AUTOMATICALLY OPERABLE IN RESPONSE TO SUCH TWISTING MOVEMENT WHEN SAID PLUNGER ROD IS BEING ENGAGED WITH THE PISTON OF A SHORTER AMPULE TO OBSTRUCT OUTWARD MOVEMENT OF SAID PLUNGER ROD BEYOND A PREDETERMINED POSITION TO INSURE AGAINST PULLING OF THE PISTON AWAY FROM SUCH SHORTER AMPULE.
Claim 2
Dependent Claim
133 words
A MULTIPLE CAPACITY INJECTION SYRINGE ADAPTED TO BE USED WITH AMPULES OF DIFFERENT LENGTHS COMPRISING (A) A BARREL OF SUFFICIENT LENGTH TO RECEIVE A LONG AMPULE AND HAVING MEANS AT ITS INNER END TO RETAIN AN AMPULE IN THE BARREL; (B) A HEAD MOUNTED AT THE OUTER END OF THE BARREL; (C) A PLUNGER ROD SLIDABLY MOUNTED IN THE BARREL HEAD HAVING MEANS AT ITS INNER END FOR ATTACHMENT TO THE AMPULE PISTON BY A RELATIVE TWISTING MOVEMENT IN ONE DIRECTION; AND (D) MEANS IN SAID HEAD AUTOMATICALLY OPERABLE IN RESPONSE TO SUCH TWISTING MOVEMENT WHEN SAID PLUNGER ROD IS BEING ENGAGED WITH THE PISTON OF A SHORTER AMPULE TO OBSTRUCT OUTWARD MOVEMENT OF SAID PLUNGER ROD BEYOND A PREDETERMINED POSITION TO INSURE AGAINST PULLING OF THE PISTON AWAY FROM SUCH SHORTER AMPULE.
References Cited (Backward Citations)
US2753967A
Cited
US2830586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |