Self-injecting hypodermic syringe device
First Claim
1. A portable device for holding a loaded hypodermic syringe and effecting an instantaneous injection of the needle of the syringe into the flesh followed by operation of the plunger of the syringe, said device comprising in combination, a handle frame having a longitudinal guideway, a syringe slide movable along said guideway, means on said slide to support a syringe having a needle on one end and a plunger knob on the other, a spring connected between said syringe slide and handle frame, a sear engageable with said syringe slide and operable to secure the same in a retracted position in said guideway, and injecting means on said handle frame comprising relatively movable cylinder and piston elements, one of said elements being movable to a first position to release said sear and thereby cause said spring instantly to move said slide and a syringe when mounted thereon to inject the needle thereon into flesh, and continued movement of said element thereafter effecting movement of the plunger of said syringe to inject the contents of the syringe through said needle thereof.
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Accused Products
Abstract
A hand-held instrument having a handle somewhat resembling a pistol grip depending from a horizontal frame having a slide on the forward end thereof to which a conventional hypodermic syringe is connected and including a tension spring connected to the rearward end of said slide for purposes of instantly injecting the needle of the syringe into flesh. The slide is held in its rearward, cocked position by a sear and the sear is released by means of the piston of a piston and cylinder unit, the piston being operated initially to release the sear from the syringe slide to effect injecting movement thereof. A flexible bulb is supported within the handle and a finger-engageable lever engages the bulb to force fluid against the piston to cause release of the sear and continued compression of the bulb operates a finger guided for movement against the outer end of the plunger of the syringe and forces the same in discharging direction immediately after the needle of the syringe has been injected into flesh.
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Citations
13 Claims
- 1. A portable device for holding a loaded hypodermic syringe and effecting an instantaneous injection of the needle of the syringe into the flesh followed by operation of the plunger of the syringe, said device comprising in combination, a handle frame having a longitudinal guideway, a syringe slide movable along said guideway, means on said slide to support a syringe having a needle on one end and a plunger knob on the other, a spring connected between said syringe slide and handle frame, a sear engageable with said syringe slide and operable to secure the same in a retracted position in said guideway, and injecting means on said handle frame comprising relatively movable cylinder and piston elements, one of said elements being movable to a first position to release said sear and thereby cause said spring instantly to move said slide and a syringe when mounted thereon to inject the needle thereon into flesh, and continued movement of said element thereafter effecting movement of the plunger of said syringe to inject the contents of the syringe through said needle thereof.
Specification