US3016895A - Injector for subcutaneous implantation of solids - Google Patents

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Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M37/00—Other apparatus for introducing media into the body; Percutany, i.e. introducing medicines into the body by diffusion through the skin
  • A61M37/0069—Devices for implanting pellets, e.g. markers or solid medicaments
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61D—VETERINARY INSTRUMENTS, IMPLEMENTS, TOOLS, OR METHODS
  • A61D7/00—Devices or methods for introducing solid, liquid, or gaseous remedies or other materials into or onto the bodies of animals

Definitions

• This invention relates generally to injectors, and more particularly to a veterinarians injector of the type designed for subcutaneous implantation of solids in animals.
• the primary object of this invention is to provide an injector of the character described wherein solid pellets may be injected into animals very quickly and efliciently, because of the novel structural arrangement of the present invention.
• Another object of this invention is to provide an injector, wherein the loaded pellet may not be accidentally removed from the loading tube, during the movement of the injector, but will be held firmly in place until the injector is actuated.
• Yet a further object of this invention is to provide a device of the character described wherein a longitudinally bored pellet receiving and loading unit is provided which unit is hingedly mounted so that it may be misaligned with the body of the injector, so that a solid pellet may be easily inserted therein, for convenient loading of the injector.
• Still a further object of this invention is to provide a locking device for retaining said loading unit in alignment with the body of the ejector, at all times, until the locking and unlocking mechanism is actuated.
• An even further object of this invention is to provide a device of the character described wherein the loading tube is provided with a camming surface which cooperates with the locking and unlocking mechanism, so that the unit need only be aligned with the body of the injector, for the locking mechanism to be actuated.
• An even further object of this invention is to provide a locking mechanism of the character described wherein said receiver will be firmly held in the open position, until it is moved so that the camming surface allows it to fall back into proper position in alignment with the body of the injector when the locking mechanism 1s actuated.
• An even further object of this invention is to provide a simple and inexpensive device and yet one whichns exceedingly useful for the purposes for which it is intended.
• FIGURE 1 is a side elevational view of the in ector comprising the present invention
• FIGURE 2 is a vertical sectional View taken substantially along the plane defined by reference line 2-2 of FIGURE 1 illustrating details of construction thereof;
• FIGURE 3 is an enlarged fragmentary vertical sec tional view illustrating the needle assemblyand the end of the loading tube, with the pellet be1ng illustrated in movement through the tube and into the needle member;
• FIGURE 4 is a perspective view illustrating the open position of the loading member with respect to the injector body.
• the numeral generally designates the in ector body. To this injector body 16 is pivotally connected at longitudinally bored pellet receiving and loading unit 12. Also,
• the necessary needle unit 14 is connected to the forward portion of the loading tube 12 so that the skin of an animal may be punctured thereby.
• the injector body 10 comprises a tubular cylinder or barrel 16, open at both ends, and having threads 18 on the inner surface of the rear end thereof.
• the tubular member or barrel On the forward end, the tubular member or barrel is formed with a peripheral reinforcing collar-like portion 20, which has ears 22 (FIGS. 1 and 4) projecting therefrom, by which the openable and closable unit 12 is pivotally connected to the body 10.
• a finger engaging member 24 is connected to the rear portion of the barrel 16, and has indentations therein so as to more comfortably fit the contour of the index and middle fingers when using the injector. This finger member 24 is held in place by a cap 26.
• This cap has a projecting flange 28 which is threaded as at 30 so as to engage the threads 18 of tubular member 16, and enclose the rearward end of the body.
• the finger member 24 has a circular opening formed therethrough so as to allow the cap 26 to pass through the opening and the head 32 of cap 26 will engage the outer border of the opening formed in the finger member, so as to fasten the finger member between the rearward edge of body 10 and the head of the cap 26.
• a central opening is formed axially through cap 26, so as to accommodate an ejector rod.
• Ejector rod 36 is slidably engaged in opening 34, and has a handle 38 on its outer end thereof so that a thumb may engage this handle while the index finger and middle finger of a user are engaging finger member 24, so as to actuate the injector in the usual manner.
• a sleeve 40 having slightly smaller dimensions than tubular member 16 is slidably mounted internally of tubular member 16, and has a closed bottom 42 and a closed top 44. However, in order that the ejector rod 36 may pass therethrough openings 46 and 48 are formed in ends 42 and 44 respectively.
• a shoulder-forming washer 50 or some other equivalent means is fastened to rod 36, and is engageable with the sleeve-end 42 so that as rod 36 is retracted the sleeve 40 will also be retracted.
• a spring 52 is disposed about rod 36 and between sleeveend 42 and cap 26, for constantly urging the sleeve 40 forwardly of body 10. It may be seen that in the normal position, illustrated in FIGURES 1 and 2, the end of ejector rod 36 will project into loading tube 12.
• the aforementioned longitudinally bored pellet receiving and loading unit 12 comprises a circular cup 54 defining and providing a socket or chamber 56 of proper size to permit the forward projectible and retractible end of sleeve 40 to be projected into said socket.
• a tube 58 sometimes referred to as a loading tube, projects forwardly from the bottom of the cup 54 and has its bore aligned with the bore or passage at the bottom of the cup and also has external screw threads (FIG. 3) formed on the end thereof.
• FIGS. 2 and 4 the edge of the rim of the cup 54 which faces the sleeve is cut away, as at 62, for clearance.
• the unit 12 is connected by means of bolts 64 which pass through cars 22 and into the cup 54, so that this novel unit 12 is pivotally connected to the barrel 16. Furthermore, it should be apparent that the cutaway portion 62 is provided so that the cup will have suflicient clearance to hinge freely. Thus, as viewed in FIGURE 2, it may be seen that the unit 12 may be pivoted, counterclockwise into the open or loading position, but not clockwise since the rim of the cup 54 will abut the reinforced portion 20 of the barrel.
• a central bore 66 is formed axially through unit 12, and is in alignment with the ejector rod 36, so that a portion of this rod is telescoped Furthermore, the projecting forward end portion of sleeves 4t telescoping into the socket 56 locks the cup 54 and tube 58 against pivotal movement with respect to the barrel 16. It may thus be seen that the cup and tube components of unit 12 remain aligned with barrel 16, until the ejector rod 36 is purposely retracted, whereupon shoulder 59 will engage sleeve 49 and pull it rearwardly. Upon this movement, the forward end of ejector 36 will be removed from bore 66, and the forward portion of sleeve 40 will be removed from the socket in the cup 54 so that the loading unit may pivot into its open loading position (FIG. 4).
• the needle unit 14 is constructed of a hollow needle member 7% which has an internal passage '72 therein, and an inclined forward portion as at 74- to define a puncture point for inserting a needle into the skin. Furthermore, a knurled coupling '76 is engaged with the needle member and threadedly connected to threads 60 of forward portion of the tube 58. It is to be noted that at 78 the needle has an enlarged portion with an inclined surface which abuts against inclined surface 813 of the connecting coupling 76 so as to fasten needle 7b to the rest of the device.
• pellet retaining means is mounted in the bore of the pellet receiving and ejecting unit 12. More specifically, FIG. 2 shows the nose of the pellet 84 abutting the elastic Washer 82 which is located between the end of the needle and the shoulder-forming end of the tube 58.
• the center opening in the washer is of a diameter less than the cross-section of the bore and also the pellet but this opening is adapted to expand and to allow the pellet to be driven and forced therethrough when forcibly pressed by the leading end of the ejector rod 36. This step is brought out in FIG. 3 wherein it will be observed that approximately one-half portion of the pellet has been shoved through the center opening of the washer 82.
• a pellet implanter comprising in combination a barrel having an open end and a closed end provided with a central aperture, a pair of transversely spaced ears provided at and projecting longitudinally beyond the open end of said barrel, a pellet holding an injecting unit pivotally mounted between said ears for swinging movement about an axis transverse of the barrel, said unit including a body member disposed adjacent the open end of the barrel and pivoted to said ears, a tubular extension provided on said body member, said body' member and extension having an axial pellet receiving bore disposed in axial alignment with said barrel when said unit is swung to an operative position and a counterbore in said body member at the end of said bore facing the open end of the barrel, said counterbore being of substantially the same diameter as the inside of the barrel and coaxial therewith when the unit is in its operative position but being oriented laterally with respect to the barrel when said unit is swung to a position for loading a pellet into said bore, said bore being substantially smaller in diameter than said counterbore, an injector needle co
• said yieldable means comprise a resilient washer interposed between said needle and said extension and having a central opening in axial alignment with the needle passage and the extension bore, said central opening of said washer being smaller in diameter than said bore to retain a pellet in the latter but being resiliently enlargeable by the passage of a pellet therethrough under actuation of said rod.

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• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Veterinary Medicine (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Animal Behavior & Ethology (AREA)
• Wood Science & Technology (AREA)
• Zoology (AREA)
• Dermatology (AREA)
• Medical Informatics (AREA)
• Anesthesiology (AREA)
• Biomedical Technology (AREA)
• Heart & Thoracic Surgery (AREA)
• Hematology (AREA)
• Infusion, Injection, And Reservoir Apparatuses (AREA)

Description

Priority Applications (1)

Applications Claiming Priority (1)

Publications (1)

Family

ID=25027083

Family Applications (1)

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Cited By (74)

Citations (3)

• 1958
  • 1958-08-01 US US752622A patent/US3016895A/en not_active Expired - Lifetime

Patent Citations (3)

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