Fluid flow control device with retractable cannula

Patent metadata

Field	Value
Publication number	US-9694139-B2
Application number	US-201615218949-A
Country	US
Kind code	B2
Filing date	Jul 25, 2016
Priority date	Jun 10, 2008
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

A device having a housing; a cannula projecting forwardly from the housing; a connector useful for attaching the device to a fluid source or receptacle; a fluid flow path establishing fluid communication between the cannula and the connector; a retraction mechanism biasing the cannula away from its projecting position; and an actuator supported by the housing and configured to modify the fluid flow path so as to terminate fluid flow through the device, seal off the fluid flow path, and release the retraction mechanism to retract the cannula into the housing. The subject device is particularly preferred for use in the medical field, for example, as part of an infusion set or as a collection device for blood, or other fluids or flowable matter.

First claim

What is claimed is:

1. A device comprising:
a housing;
a cannula;
a connector attachable to a fluid source or receptacle external to the device;
a fluid flow path in fluid communication with the connector;
a retraction mechanism biasing the cannula rearwardly;
a retraction cavity having a front portion, wherein the retraction cavity is connected to the housing such that at least the front portion of the retraction cavity can move laterally from a first position to a second position, and wherein the retraction mechanism is separate from and not coaxial with the fluid flow path;
wherein when the front portion of the retraction cavity is in the first position, the cannula projects forwardly from the housing, the cannula is in fluid communication with the connector through the fluid flow path, and the retraction cavity is not coaxial to or aligned with the cannula;
wherein when the front portion of the retraction cavity is in the second position, the retraction cavity is aligned with the cannula and the retraction mechanism retracts the cannula into the retraction cavity such that it no longer projects forwardly from the housing and the cannula is no longer in fluid communication with the connector.

2. The device of claim 1 further comprising at least one sealing element configured to prevent fluid leakage into or out of the fluid flow path.

3. The device of claim 1 wherein at least a portion of the retraction cavity is slidably disposed within the housing.

4. The device of claim 1 wherein the retraction cavity is pivotally connected to the housing.

5. The device of claim 1 wherein the fluid flow path is substantially parallel to the retraction cavity.

6. The device of claim 1 wherein the entire retraction cavity is moved laterally to move the front portion from the first to the second portion.

Assignees

• Retractable Technologies Inc
• Shaw Thomas J

Inventors

• Shaw Thomas J
• Small Mark
• Zhu Ni

Classifications

• A61M5/3232 Primary

  Semi-automatic needle retraction, i.e. in which triggering of the needle retraction requires a deliberate action by the user, e.g. manual release of spring-biased retraction means · CPC title

• A61M25/0637

  Butterfly or winged devices, e.g. for facilitating handling or for attachment to the skin · CPC title

• A61M5/3257

  Semi-automatic sleeve extension, i.e. in which triggering of the sleeve extension requires a deliberate action by the user, e.g. manual release of spring-biased extension means · CPC title

• A61M5/158

  Needles {for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body} · CPC title

• A61M5/50

  having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile {(retractable needles or needle protectors with means for preventing re-use A61M5/321)} · CPC title