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US 6,148,818 AGranted
Helically-reinforced tubes
AssigneeSmith Industries Public Limited Company
InventorEric Pagan
Life of this patent
Estimating the term…
Abstract
An endotracheal tube has a wall of PVC and a reinforcement filament of a harder plastics wound with a canted helical form so that adjacent turns of the filament slope at angles of 70.degree. and 80.degree. respectively in the plane of curvature of the tube.
Claims11
A tube comprising:
- a first end;
- a second end;
- a bore extending therethrough for the passage of fluid along the tube;
- and a wall with a reinforcing element of a canted helix form adapted to ensure resistance to crushing from lateral forces in the plane of curvature.
1 more element
An endotracheal tube comprising:
- a first end adapted for location in the trachea;
- a second end adapted to extend from the mouth of the patient;
- a bore extending therethrough for the passage of gas along the tube;
- and a wall with a reinforcing element of a canted helix form;
- and wherein adjacent turns of said reinforcement slope in the same sense when viewed at right angles to the tube's longitudinal length.
2 more elements
A method of making a reinforced tube comprising the steps of:
- forming a base tube, wrapping around the base tube a reinforcement filament in a canted helical fashion by longitudinally oscillating a shuttle as the filament is wrapped, and applying an outer layer of material over the filament.
A tube comprising:
- a first end;
- a second end;
- a bore extending therethrough for the passage of fluid along the tube;
- and a wall with a reinforcing element of a canted helix form;
- and wherein adjacent turns of said reinforcement element slope in the same sense when viewed at a right angle to the tube's longitudinal length with the two slopes of each tooth being at different angles.
2 more elements
Dependencies are inferred from the claim text.