Method of manufacture of a cannula for a medical device

Patent 5863366 Issued on January 26, 1999. Estimated Expiration Date:

November 15, 2016. 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

Patent References

243396

3416531

3671979

3769960

Hemostasis cannula
Patent #: 4000739
Issued on: 01/04/1977
Inventor: Stevens

Aortic heart valve catheter
Patent #: 4056854
Issued on: 11/08/1977
Inventor: Boretos , et al.

Adapter for intra-aortic balloons and the like
Patent #: 4122858
Issued on: 10/31/1978
Inventor: Schiff

Cannula for arterial and venous bypass cannulation
Patent #: 4173981
Issued on: 11/13/1979
Inventor: Mortensen

Elongatable balloon catheter
Patent #: 4276874
Issued on: 07/07/1981
Inventor: Wolvek , et al.

Cannula for intra-aortic balloon devices and the like
Patent #: 4287892
Issued on: 09/08/1981
Inventor: Schiff

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Inventor

Snow, David W.

Application

No. 749683 filed on 11/15/1996

US Classes:

156/143, Helical wire or plural ring reinforced flexible tube making156/189, About irregular or configured mandrel surface156/192, Prior to winding156/195, Longitudinally progressive helical winding604/526Lumen enforced by embedded or coiling strands

Examiners

Primary: Aftergut, Jeff H.

Attorney, Agent or Firm

Grainger; Jeffrey J., Hoekendijk; Jens E.

Foreign Patent References

218275 EP. 04/19/1987
0 414 50 A1 DE. 06/19/1990
0 350 302 GB. 07/19/1989
WO 91/01689 WO. 02/19/1991
WO 91/08791 WO. 06/19/1991
91/17720 WO. 11/19/1991
92/17118 WO. 10/19/1992
WO 95/05860 WO. 03/19/1995

International Classes

A61M 025/00
A61M 025/16
B65H 081/00

Abstract

An elongate member is coated with a coating, preferably by coextrusion, and the coated elongate member is wound in a helical manner around a mandrel. The coated elongate member preferably has a square cross-sectional shape so that adjacent portions of the coated elongate member engage one another when the coated elongate member is wound around the mandrel. The coated elongate member is then heated so that the coating on adjacent portions of the coated elongate member fuse together to form an integral strcucture. Another layer of material may be provided on the radially inner or outer wall of the coated elongate member.

Other References

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