← Back to Patent Explorer
DE2139004A1 Expired / Lapsed DE ⏱️ 0.0 years remaining

Infusion cannula - with self sealing rubber membrane preventing air embolisms occurring in the cannulated vein

Assignee: Individual
•
Filing: 1971-08-04
•
Granted: —
•
Expires: 1991-08-04
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract The disposable cannula comprises an outer plastic tube and inner steel tube, in which a rubber membrane is arranged across the plastic tube connecting piece and is pierced through by the steel tube (needle) such that when the needle is withdrawn, the membrane automatically seals up, preventing air passing into the blood vessel.

Inventors

  • 👤 Harry Prof Dr Schaeffer

Bibliographic Details

Application Number —
Jurisdiction DE
Data Source google_patents
Last Synchronized 2026-10-23 01:51
CPC Classifications
A; A61; A61M; A61M39/00; A61M39/02; A61M39/06; A61M39/0606

Claims Analysis

Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Maintenance schedule is calculated for granted US utility patents.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag