Variable stiffness microtubing and methods of manufacture

Details Variable stiffness microtubing and methods of manufacture Variable stiffness microtubing and methods of manufacture

2005-01-11

2005-01-11

Cole, Elizabeth M. (Department: 1771)

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

C428S035900, C428S036200, C428S036300, C428S036910

Reexamination Certificate

active

06841214

ABSTRACT:
A novel composite microtubing with variable stiffness over the length of the tubing and continuous process for manufacturing the same is provided. By removing portions of one or more selected layers of the composite microtubing, varying the pick count of a braided layer, and changing the diameter over the length of the microtubing, the stiffness of the microtubing may be varied by a factor of 100 from proximal end to distal end. The continuous process allows a predetermined stiffness pattern to be repeated over a measured length for economical manufacture and results, if desired, in tubing of extremely small diameter and extremely thin tube walls.

REFERENCES:
patent: 3965909 (1976-06-01), Waddell et al.
patent: 4702252 (1987-10-01), Brooks et al.
patent: 4925710 (1990-05-01), Buck et al.
patent: 9320881 (1993-10-01), None

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