Needle device

Patent 5207647 Issued on May 4, 1993. Estimated Expiration Date:

November 5, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

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Inventor

Phelps, David Y.

Application

No. 788253 filed on 11/05/1991

US Classes:

604/158Body entering conduit axially movable within body piercing conduit while former is disposed in the body

Examiners

Primary: Hirsch, Paul J.

International Class

A61M 005/00

Abstract

A needle device for delivering medicaments to the body of a patient, the device including an elongated housing having a catheter on one end, with a trocar arranged through the end of the housing and the catheter. The trocar is reciprocably advancable and retractable with respect to the catheter. A spring biased carriage in the housing controls the movement of the trocar and causes it to retract from the distal end of the catheter after the catheter and trocar have been advanced into a body and the trocar no longer encounters resistance to forward or distally directed advance of the device.