Automatic injecting gun for remote controlled vaccination of cattle, pigs, and animals in general

• US 4,186,741 A
• Filed: 12/02/1977
• Issued: 02/05/1980
• Est. Priority Date: 12/13/1976
• Status: Expired due to Term

• Current Assignee: Giulio Cesaro
• Original Assignee: Giulio Cesaro
• Inventors: Cesaro, Giulio
• Primary Examiner(s): Bagwill, Robert E.
• Application Number:
  US05/857,109
• Time in Patent Office: 795 Days
• Field of Search: 128/218, 128/173 H, 128/215, 128/220
• US Class Current: 604/135
• CPC Class Codes: A61D 7/00 Devices or methods for introducing solid, liquid, or gaseous remedies or other materials into or onto the bodies of animals for reproduction or fertilisation A61D19/00 ; devices for implanting pellets, radon seeds or the like A61M37/0069

Abstract

An automatic injecting gun for remote vaccination of cattle, pigs and animals in general comprises a gun body provided with a handle, an adjustable injector in the gun body for drawing vaccination liquid from a multi-dose container and discharging the vaccination liquid under control, a tubular duct engaging the injector and projecting from the gun body and an injection needle removably inserted on the end of the tubular duct not engaged with the injector.

Claims

1. An injecting gun for controlled vaccination of cattle, pigs and animals in general, comprising a supporting box-like gun body having an extension in the form of a handle, an injector assembly supported by said box-like gun body, said injector assembly having a hollow elongated cylinder member with a cylinder cavity having an open ended portion thereof fixed on said box-like body and facing the interior thereof and an opposite end portion thereof projecting outside said box-like body, said opposite end portion having connector means for selectively connecting thereto needle means and auxiliary elongation members, a hollow plunger member with a head portion and a plunger cavity and slidable within said cylinder cavity, a first check valve structure within said cylinder cavity arranged in a position more remote from said open end of the cylinder member than said plunger head portion to define therebetween a cylinder chamber the length whereof being defined by the actual position of said plunger member, a second check valve structure in the head portion of said plunger member, said first check valve structure controlling the flow of vaccination liquid from said chamber towards said opposite end portion of the cylinder cavity and vice versa to prevent such flow when the liquid pressure in said opposite end portion cavity is higher than the liquid pressure in said cylinder chamber and to allow such flow when the pressure conditions are reversed, said second check valve structure controlling the flow of vaccination liquid from said cylinder chamber towards said plunger caivty and vice versa to prevent liquid passage from said cylinder chamber towards said plunger cavity when the liquid pressure within said cylinder chamber is higher than the liquid pressure within said plunger cavity and to allow such passage when the pressure conditions are reversed, duct means for connecting the plunger cavity with a source of vaccination liquid, adjustable limit stop means for said plunger to adjust the maximum volume of said cylinder chamber and trigger means and rechargeable springed release means for said plunger member to actuate the injection action of said plunger member, when said trigger means are triggered.

2. Injecting gun according to claim 1, wherein said auxiliary elongation members comprise at least one elongated barrel member having connection means at both end portions thereof cooperating at one end thereof with said connector means and at the other end thereof with said needle means and duct means for hydraulic communication thereof with said cylinder cavity.

3. Injecting gun according to claim 1, wherein said plunger comprises an elongated hollow stem rotatable about its axis and in hydraulic communication with the plunger cavity and with said duct means, and wherein said adjustable limit stop means comprise an outer screw thread on said elongated stem, a block member in screwing engagement with said outer screw thread thereby to shift said block member along said elongated stem when said stem is rotated and said block member is prevented from rotation and a stop surface member included in said trigger means in the path of said adjustable block member normally to hold said block member in the position in which said rechargeable springed release means are charged and to release said block member when said trigger means are triggered.

4. An injecting gun for controlled vaccination of cattle, pigs and animals in general, comprising a supporting box-like gun body having an extension in the form of a handle, an injector assembly supported by said box-like gun body, said injector assembly having a hollow elongated cylinder member with a cylinder cavity having an open ended portion thereof fixed on said box-like body and facing the interior thereof and an opposite end portion thereof projecting outside said box-like body, said opposite end portion having connector means for selectively connecting thereto needle means and auxiliary elongation members, a hollow plunger member with a head portion and a plunger cavity and rotatable and slidable within said cylinder cavity, a first check valve structure within said cylinder cavity arranged in a position more remote from said open end of the cylinder member than said plunger head portion to define therebetween a cylinder chamber the length whereof being defined by the actual position of said plunger member, a second check valve structure in the head portion of said plunger member, said first check valve structure controlling the flow of vaccination liquid from said chamber towards said opposite end portion of the cylinder cavity and vice versa to prevent such flow when the liquid pressure in said opposite end portion cavity is higher than the liquid pressure in said cylinder chamber and to allow such flow when the pressure conditions are reversed, said second check valve structure controlling the flow of vaccination liquid from said cylinder chamber towards said plunger cavity and vice versa to prevent liquid passage from said cylinder chamber towards said plunger cavity when the liquid pressure within said cylinder chamber is higher than the liquid pressure within said plunger cavity and to allow such passage when the pressure conditions are reversed, duct means for connecting the plunger cavity with a source of vaccination liquid, said plunger having a hollow stem extending into the interior of said box-like body and supported thereby rotatable about its axis together with said plunger and in hydraulic communication with said plunger cavity and with said duct means, an outer screwthread on said elongated stem, a block member within said interior of said box-like body, said block member engaging with said outer screwthread of said hollow stem thereby to shift said block member along said stem when said stem is rotated and said block member is prevented from rotation, articulated spring loaded lever means conneted with said block member to shift said block member together with said stem and said plunger in the direction of the axis of said stem from a released position in which the plunger is in its fully extracted position nearest to said first check valve structure into a recharged position in which the plunger is in its fully withdrawn position remote from said first check valve when said spring loaded articulated lever means are hand actuated thereby to suck vaccination liquid from said source of vaccination liquid into said cylinder chamber, a trigger bar biased towards the path of said block member and having a notch in engagement with said block member when said block member has been shifted together with said stem into its re-charged position and a trigger lever connected with said trigger bar adapted when triggered to move said trigger bar away from said block member and release said block member to allow said spring loaded lever means to throw said block member together with said stem and said plunger into the fully extracted position thereof and thereby expel the vaccination liquid contained in said cylinder chamber therefrom and cause it to reach said needle means and be ejected therefrom.