초록 ▼

A safety retractable sheath covers an injection needle for protection against accidental pricking. The sheath extends from a base secured to the hub of the needle and has bellowed walls made of resilient material. It may be axially retracted toward the hub to expose the needle, and springs back to c

A safety retractable sheath covers an injection needle for protection against accidental pricking. The sheath extends from a base secured to the hub of the needle and has bellowed walls made of resilient material. It may be axially retracted toward the hub to expose the needle, and springs back to cover its entire length when released. A constricted section of the sheath beyond the tip of the needle is axially offset to prevent accidental exposure of the tip. A latching bellow segment surrounding the base allows for adjustment of the sheaths to the lengths of the needle.

대표청구항 ▼

In combination with an injecting needle having a rigid cannula extending from a coaxial hub for connecting to the outlet of a syringe or the like to a pointed distal tip, a retractable sheath which comprises: a hollow base shaped and dimensioned to intimately engage over the hub; a sleeve extending

In combination with an injecting needle having a rigid cannula extending from a coaxial hub for connecting to the outlet of a syringe or the like to a pointed distal tip, a retractable sheath which comprises: a hollow base shaped and dimensioned to intimately engage over the hub; a sleeve extending coaxially from the base around the length of the cannula, said sleeve being formed by a plurality of alternately inverted frusto-conical segments joined by resiliently pliable alternating inner and outer ring sections; wherein said alternately inverted frusto-conical segments and ring sections are integrally molded from a common resilient material; and wherein said sleeve comprises an end portion having a substantially lesser cross-sectional diameter than the major part of the sleeve.