Reinforced tubes

Details Reinforced tubes Reinforced tubes

1997-12-23

1999-05-25

Hughes, S. Thomas

Metal working

Method of mechanical manufacture

Obtaining plural product pieces from unitary workpiece

604527, 29458, 264148, B23P 1700

Patent

active

059060360

ABSTRACT:
Reinforced, cuffed tubes are made by winding a plastic reinforcing filament around the outside of tubing and then applying a flexible layer on top of the tubing to just cover the filament and form a smooth outer surface. The filament is then removed from regions of the tubing using a pick to form a series of reinforced regions and unreinforced regions along the tubing. A second layer is then coextruded over the reinforced and unreinforced regions, which includes a longitudinal lumen. The tubing is cut into tubes midway along the unreinforced regions so that there is an unreinforced region at both ends of the tubes. An inflatable cuff is attached to each tube opening into the lumen in the second layer.

REFERENCES:
patent: 3485234 (1969-12-01), Stevens
patent: 3965909 (1976-06-01), Waddell et al.
patent: 4577543 (1986-03-01), Wilson
patent: 5334169 (1994-08-01), Brown et al.
patent: 5421826 (1995-06-01), Crocker
patent: 5542926 (1996-08-01), Crocker
patent: 5573520 (1996-11-01), Schwartz
patent: 5681296 (1997-10-01), Ishida

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