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US 4,781,692 AGranted
Retractable safety needles
AssigneeThe University of Virginia Alumni Patents Foundation
InventorsJanine C. Jagger, Richard D. Pearson, Patrice G. Guyenet
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AssigneeThe University of Virginia Alumni Patents Foundation
InventorsJanine C. Jagger, Richard D. Pearson, Patrice G. Guyenet
Estimating the term…
A flexible plastic catheter extends from a distal end of a rigid plastic housing. An elastomeric seal at the distal end of the housing tightly fits within the housing and grips in its bore a stylet. The stylet has a sharp distal end and an enlarged proximal end which receives a distal end of a plastic tube within the housing. The stylet is slideable within the elastic seal. In an extended position, the stylet distal end extends beyond a distal end of the catheter and the proximal end abuts the elastomeric seal. In a retracted position, the elastomeric seal grips the catheter near its distal end and the proximal end abuts a constriction in the proximal end of the housing. In that retracted position, the tubing, the stylet and the catheter form a fluid flow path.
An intravenous catheter with retractable stylet comprising,
A method of using an intravenous catheter comprising,
Catheter apparatus comprising a rigid plastic housing having distal and proximal ends, a flexible plastic catheter connected to the distal end of the housing and extending axially therefrom, a stylet having a body-insertable distal end and a proximal end connected to a length of flexible plastic tubing, the stylet being movable within the housing and catheter between an extended position in which a distal end of the stylet projects from a distal end of the catheter and a retracted position in which a distal end of the stylet is positioned within the rigid plastic housing, and a sealing means positioned within a distal end of the housing and engaging the stylet and tightly sealing the distal end of the housing or the stylet in extended and retracted positions of the stylet.
Dependencies are inferred from the claim text.