Thomas E Sutton

US Patent:

58823379, Mar 16, 1999

Filed:

Jun 7, 1995

Appl. No.:

8/482588

Inventors:

David L. Bogert - Plainville CT
Thomas K. Sutton - Carrollton TX
Herbert Brown - Colleyville TX

Assignee:

Johnson & Johnson Medical, Inc. - Arlington TX

International Classification:

A61M 500

US Classification:

604110

Abstract:

A safety cover, which securably and reliably prevents the readvancement of the tip of a cannula once it has been retracted thereinto, is designed having an elongate body which includes an axial channel having elements which displace and block linear passage of the cannula once it has been retracted. In a first embodiment the displacing elements are inwardly and rearwardly extending bristles which provide for unidirectional motion of the cannula relative to the safety cover, thereby locking the cannula once it has been retracted. In a second embodiment, the displacing element is the axial channel itself which has a curvate bias and distorts into a non-linear path once the cannula is retracted. In a third embodiment, the displacing element is a spring plate which, when compressed permits the cannula to pass through, but once the cannula has been retracted, expands to prevent the tip from being readvanced.

US Patent:

57138761, Feb 3, 1998

Filed:

Jun 7, 1995

Appl. No.:

8/483949

Inventors:

David L. Bogert - Plainville CT
Thomas K. Sutton - Carrollton TX

Assignee:

Johnson & Johnson Medical, Inc. - Arlington TX

International Classification:

A61M 500

US Classification:

604243

Abstract:

A catheter insertion device incorporating a simple lever and clip structure which will safely lock a catheter hub of a catheter assembly to a normally disposable cannula housing and guard structure and which, in a simple mode, enables separation of the catheter hub from the cannula assembly or structure upon retraction and protective guarding of the used cannula. Specifically, an aspect resides in providing the lever release clip for a safety catheter which upon unlocking and releasing of the catheter hub concurrently pushes the catheter hub off a nose guard of the cannula assembly, while enabling a physician or clinical personnel to release the catheter by employing only one hand. A further embodiment is adapted to enable separation between the catheter hub of a flexible catheter and the needle or cannula arrangement of a catheter insertion device by simply manipulating a lever arranged on a cannula structure or nose guard thereof by simply pushing against a push-tab element.