Coiled tubing
AssigneeParker-Hannifin Corporation
InventorDennis W. Sullivan
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Abstract
A flexible self-retracting coiled tubing having desirable recoil strength and elastic memory is described. The coiled tubing is adaptable especially as a self-retracting air tube for transmitting fluids under pressure to pneumatic equipment. The coiled tubing comprises an extruded seamless plastic tube prepared by extruding a mixture comprising a chemically extended polyester and from about 10% to about 50% of a polybutylene terephthalate polymer.
Claims8
A self-retracting flexible coiled tubing structure to transmit fluids under pressure comprising an extruded seamless tube of a mixture of a chemically extended polyester and from about 10% to about 50% of a polybutylene terephthalate polymer.
A self-retracting flexible hollow coiled tubing adapted to transmit fluids under high pressure comprising a seamless plastic tube comprising a mixture of a chemically extended polyester with a durometer D hardness of about 63 and from about 10 to 25% of a polybutylene terephthalate polymer.
Dependencies are inferred from the claim text.