Lubricant system for hypodermic needles and method for its application
AssigneeBecton, Dickinson and Company
InventorBrian J. Pelkey
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Abstract
A lubricated hypodermic needle of the invention includes an elongate tube with an outside surface, a proximal end, a distal end and an open bore therethrough. The needle has a hub attached to the proximal end of the needle that is used to attach the needle to a fluid handling device. The invention includes a lubricious coating applied to and adherent to the outside surface of the tube. The lubricious coating has a first layer formed from an at least partially cured organosiloxane copolymer and polydimethylsiloxane that has a viscosity greater than about 1000 centistokes. The lubricious coating has a second layer, applied as a secondary operation onto the first layer, that includes a polydimethylsiloxane having a viscosity between about 50 centistokes and about 350 centistokes.
Claims8
A lubricated hypodermic elongate tube needle comprising:
- an elongate tube having an outside surface, a proximal end, a distal end and an open bore therethrough;
- a hub attached to said proximal end of said elongate tube for attaching said elongatic tube to a fluid handling device;
- a lubricious coating applied to and adherent to said outside surface of said elongate tube comprising a first layer formed from an at least partially cured organosiloxane copolymer and polydimethylsiloxane having a viscosity greater than about 1000 centistokes and a second layer, applied as a secondary operation onto said at least partially cured first layer, including a polydimethylsiloxane having a viscosity between about 50 centistokes and about 350 centistokes.
A method for lubricating hypodermic needles comprising:
- applying a coating of a first material comprising an organosilane copolymer including a polydimethylsiloxane having a viscosity greater than about 1000 centistokes to an outside surface of a hypodermic needle;
- allowing said first material to at least partially cure;
- and
- applying, as a secondary operation, a coating of a second material comprising a polydimethylsiloxane having a viscosity between about 50 centistokes and about 350 centistokes onto said at least partially cured first layer.
Dependencies are inferred from the claim text.