Vaccination gun

Details Vaccination gun Vaccination gun

1979-07-19

1981-11-24

Recla, Henry J.

Surgery

Device for creating a tracheotomy incision

2224022, 222335, A61M 530

Patent

active

043017959

ABSTRACT:
In a vaccination gun provided with a piston pump for the vaccine and a gas-propelled motor for the vaccine pump, the drive motor is arranged with one end thereof coupled to the vaccine pump. In the handle grip of the vaccination gun, a coupler connects a propellant gas cylinder, through a trigger, or locking valve, to the drive motor. In order to assure that the injection pressure of the propellant gas remains between about 270 and 300 bar regardless of the pressure in the cylinder, there is provided a pressure regulation chamber between the coupler and the locking valve, which chamber is provided with a flap valve coupled to a hollow shaft. The shaft moves within a cylindrical portion of the chamber and is provided with radial borings for permitting the propellant gas to pass between the main part of the chamber and the cylindrical portion thereof.

REFERENCES:
patent: 2358719 (1944-09-01), Klein
patent: 2574028 (1951-11-01), Fields et al.
patent: 3250444 (1966-05-01), Ward
patent: 3292622 (1966-12-01), Banker
patent: 3394851 (1968-07-01), Gorman
patent: 3518990 (1970-07-01), Banker

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