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US 4,772,272 AGranted
Needle protective sleeve
OwnerBarton C. McFarlandinventor
Life of this patent
Estimating the term…
Abstract
A protective sleeve for a hypodermic needle completely overlies the needle when in a needle protection position and also overlies a needle support and at least part of a syringe to which the needle support is attached. The protective sleeve is moved from the needle protecting position to a needle injection position solely by axial movement of the protective sleeve. The protective sleeve is releasably retained in either of its positions through cooperating retaining elements on the protective sleeve and the needle support or the syringe.
Claims20
In combination:
- a hollow needle having a pointed end;
- means to support said needle;
- means connected to said needle support means to supply a liquid to said needle for injection into a human or an animal when said pointed end of said needle is inserted in a human or an animal;
- a protective sleeve for disposition over the entire length of said needle when said protective sleeve is in a first position so that said pointed end of said needle is within said protective sleeve;
- said protective sleeve being movable solely by axial movement of said protective sleeve between its first position and a second position in which said pointed end of said needle extends beyond said protective sleeve and said protective sleeve overlies said needle support means and at least a portion of said connected means;
- said protective sleeve and one of said needle support means and said connected means having first cooperating means to releasably retain said protective sleeve in its first position;
- said protective sleeve and said one of said needle support means and said connected means having second cooperating means to releasably retain said protective sleeve in its second position;
- said protective sleeve in its second position exposing substantially the entire length of said needle including said pointed end;
- said protective sleeve is a substantially hollow cylinder having an inner surface and its opposite ends open;
- said connected means including:
- a barrel having a recess to receive liquid containing means containing a liquid for injection;
- and plunger means for forcing the liquid from the liquid containing means in said recess into said needle for injection through said pointed end of said needle;
- said needle support means including a hub connected to said barrel and having said needle attached thereto and extending therethrough for penetration into the liquid containing means in said recess;
- and said protective sleeve extending over said hub and at least a portion of said barrel in each of its first and second positions.
11 more elements
In combination:
- a hollow needle having a pointed end for insertion into a human or an animal;
- a hub having said needle attached thereto for support thereby and extending therethrough so that said needle has its rear end extending beyond said hub;
- means releasably connected to said hub and having said rear end of said needle extend thereinto to enable said needle to have liquid flow therethrough when said pointed end of said needle is inserted in a human or an animal;
- a protective sleeve for disposition over the entire length of said needle when said protective sleeve is in a first position so that said pointed end of said needle is within said protective sleeve;
- said protective sleeve being movable solely by axial movement of said protective sleeve between its first position and a second position in which said pointed end of said needle extends beyond said protective sleeve and said protective sleeve overlies said hub and at least a portion of said releasably connected means;
- said protective sleeve and said hub having first cooperating means to releasably retain said protective sleeve in its first position solely by axial movement of said protective sleeve to its first position;
- said protective sleeve and said hub having second cooperating means to releasably retain said protective sleeve in its second position solely by axial movement of said protective sleeve to its second position;
- said protective sleeve in its second position exposing substantially the entire length of said needle including said pointed end;
- and said protective sleeve is a substantially hollow cylinder having an inner surface and its opposite ends open.
6 more elements
The combination according to claim 21 in which said inner surface of said substantially hollow cylinder of said protective sleeve has said first and second cooperating means of said protective sleeve on its portion having the constant diameter.
Dependencies are inferred from the claim text.