FR2291702A1
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Hypodermic syringe has moulded plastic plunger and plunger rod - the diametric cross section of plunger being approx W-shaped
Assignee: ZEJMA MARIE
•
Filing: 1974-11-22
•
Granted: —
•
Expires: 1994-11-22
Abstract
Abstract A pref. disposable hypodermic syringe has a cylinder and a moulded plastic plunger with integral plunger rod. The diametric cross-section of the plunger is approx. w-shaped formed by pref. a conical end face with an annular notch adjacent its periphery; a peripheral wall which is cylindrical; and a frustoconical recess on the opposite side of the end face, the end of the plunger rod being integral with the base of the frustoconical recess. The plunger and plunger rod are moulded integrally in a single operation and the seal between the plunger and the cylinder is as good as with plungers of elastomeric material.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-25 15:54
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/26; B29C45/33; A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/315; A61M5/31511; A61M5/31513; B29C45/40; B29C45/44; B29L; B29L2031/00; B29L2031/753; B29L2031/7544
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3135260A
Cited
FR1500009A
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.