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US 4,194,505 AGranted
Containerized hypodermic module
AssigneeVac-O-Cast, Inc.
InventorWilliam L. Schmitz
Life of this patent
Estimating the term…
Abstract
A self-contained predetermined dosage hypodermic ampule with enclosed sterile needle projected by a companion injector device from the sealed forward end of the ampule, with liquid medicament pressurizing means for dispensing the medicament from the needle and into the tissue of the patient during penetration of the tissue by the needle, all portions of the length of the needle being hygienically sealed from external contamination at all times; the companion injector means having simply operated and dependable safeguards against accidental operation, and the injector means and hypodermic needle cooperating to insure smooth, non-sticking operation of the medicament pressurizing means.
Claims21
A self-contained hypodermic syringe dosage module for insertion into an injector comprising:
- a cylindrical barrel having open forward and rearward ends,
- the forward end of said barrel having a pierceable seal across it,
- the rearward end portion of said barrel having a piston in sliding sealing relation to the interior wall thereof,
- said barrel, between said seal and said piston, defining a medicament chamber,
- said piston having a longitudinal bore therethrough,
- a tissue piercing needle unit having a longitudinal lumen therein from the forward end and terminating short of the rear end thereof, said needle unit having a liquid inlet port in flow communication with said lumen rearwardly of its forward end,
- said needle shank portion being supported in the longitudinal bore of said piston with the inlet port of said shank portion located in and sealed by the wall of said bore,
- said needle, forwardly of said shank portion, being freely supported in said medicament chamber by said piston,
- said needle initially being movable longitudinally relative to said piston to pierce the seal at the forward end of said barrel and to expose said shank inlet port forwardly of said piston to permit flow of liquid medicament in said barrel into said port and said lumen.
6 more elements
A hypodermic injector assembly comprising:
- a cylindrical ampule defining a chamber for medicament having a forward end with a pierceable seal and an open rear end portion with a slidable piston supporting the rear end of the hypodermic needle shank, the forward portion of the needle being disposed in the medicament chamber,
- an injector body having a cylindrical receiver for said ampule with an abutment at one end thereof,
- said cylindrical receiver having an ampule lock engageable with the ampule to releasably hold the ampule against said abutment in said receiver,
- and power means carried by said body rearwardly of said ampule receiver and positioned to engage and forwardly project said hypodermic needle shank.
1 more element
A hypodermic injector assembly comprising:
- an injector body,
- a medicament ampule having a movable medicament pressurizing element and an injection needle,
- a plunger movably carried by said body to move said pressurizing element,
- means biasing said pressurizing element toward exerting pressure upon medicament in said ampule,
- a trigger movable in a given direction to releasably restrain said plunger,
- and a trigger safety device normally locking said trigger against movement and being movable in a direction other than said given direction of said trigger before the trigger can be moved.
3 more elements
A hypodermic injector comprising:
- an injector body having a medicament holder for supplies of medicament solutions of varied concentrations for a given volume and having a plunger chamber,
- a plunger slidable in said plunger chamber,
- a plunger rod connected to and movable with said plunger and extending rearwardly from said plunger chamber,
- a cap threadedly mounted on the rear end of said plunger chamber for longitudinal adjustment relative thereto,
- said plunger rod having an abutment engagable with said cap to limit the forward movement of the rod,
- said plunger chamber having longitudinally disposed indicia thereon within the range of longitudinal adjustment of said cap to indicate cap adjustment or predetermined medicament unit relationships to plunger rod travel,
- at least one of said plunger chamber and cap having circumferentially disposed indicia to indicate other medicament unit relationships to plunger rod travel,
- at least one set of said indicia being related to one of a plural number of medicament unit concentrations for said given liquid volume.
5 more elements
A hypodermic injector comprising:
- an injector body having a medicament holder for supplies of solute medicament in different proportions to a solvent vehicle,
- said body having a plunger chamber and a plunger slidable therein,
- a plunger rod connected to and movable with said plunger and extending rearwardly from said plunger chamber,
- a cap threadedly mounted on the rear end of said plunger chamber for longitudinal adjustment relative thereto,
- said plunger rod having an abutment engagable with said cap to limit the forward movement of the rod,
- said plunger chamber having longitudinally disposed indica thereon within the range of adjustment of said cap to correlate plunger and cap positions relative to solutions having given proportions of medicament to solvent,
- and at least one of said plunger chamber and cap having circumferentially disposed indicia to indicate the number of units to be dispensed from the solution of given medicament proportions when the cap and plunger have been correlated to a solution of given proportions.
4 more elements
In an hypodermic syringe device,
- a complete self-contained medicament ampule insertable in and removable from an injector and having a cylindrical barrel with an open rear end,
- the barrel having a forward end portion with an external flange having a rearwardly facing side wall,
- a pierceable seal across the forward end of said barrel,
- a centrally apertured cap over the forward end of the barrel and said seal and having a side wall about the forward end of the barrel and crimped behind the rearwardly facing side wall of said flange,
- a piston movable in said barrel in sealed relation to the inner wall thereof,
- and a hollow needle unit in said barrel behind said seal and having a rearwardly disposed liquid entry and being supported merely by and movable with said piston.
3 more elements
Dependencies are inferred from the claim text.