Syringe assembly
First Claim
1. A syringe assembly comprisinga hollow barrel,needle means fixedly secured to and in communication with said barrel and having a free end of discharge of material therefrom,plunger means received within said hollow barrel,said plunger means being movable manually to discharge material from said needle means,cap means for receiving at least a portion of said barrel,locking means for securing said barrel and said cap means in one of a number of relative axial positions, while permitting relative movement of said plunger means with respect to said barrel and said cap means,said locking means permitting a locked position of said cap means and said barrel means in a plurality of positions permitting needle shielding by said cap means and different needle exposure beyond said cap means first end, whereby depth of needle penetration may be controlled,said locking means includes cooperating means formed on said barrel and on said cap means, andsaid needle means free end having a predetermined position with respect to said cap means for each said locked relative axial position of said barrel and said cap means, whereby said free end may be shielded by said cap means or project a predetermined distance therebeyond depending upon said locked relative axial positions of said cap means and said barrel and independent of the relative position of said plunger means.
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Accused Products
Abstract
A syringe assembly having a hollow barrel and a needle in communication with the barrel for receipt or discharge of material therethrough. A plunger is received within the hollow barrel. A cap member receives at least a portion of the barrel and locking members are provided for securing the barrel and cap in a number of relative axial positions. A frangible end closure may be provided on the end of the cap closest to the needle. The locking members permit different locked positions for exposing different amounts of the needle. The locking members may be formed on the barrel and cap and may consist of a series of formations on the barrel adapted to engage a series of formations on the cap. Ready locking and unlocking is permitted.
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Citations
12 Claims
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1. A syringe assembly comprising
a hollow barrel, needle means fixedly secured to and in communication with said barrel and having a free end of discharge of material therefrom, plunger means received within said hollow barrel, said plunger means being movable manually to discharge material from said needle means, cap means for receiving at least a portion of said barrel, locking means for securing said barrel and said cap means in one of a number of relative axial positions, while permitting relative movement of said plunger means with respect to said barrel and said cap means, said locking means permitting a locked position of said cap means and said barrel means in a plurality of positions permitting needle shielding by said cap means and different needle exposure beyond said cap means first end, whereby depth of needle penetration may be controlled, said locking means includes cooperating means formed on said barrel and on said cap means, and said needle means free end having a predetermined position with respect to said cap means for each said locked relative axial position of said barrel and said cap means, whereby said free end may be shielded by said cap means or project a predetermined distance therebeyond depending upon said locked relative axial positions of said cap means and said barrel and independent of the relative position of said plunger means.
Specification