US 2587984 A
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March 4, 1952 D, w, EDWARDS 2,587,984
DEVICE FOR ARTIFICIALLY INSEMINATING ANIMALS Filed Sept. 19, 1950 INVENTOR.
By flaw/140 W [OWARDJ Patented Mar. 4, 1952 DEVICE FOR ARTIFICIALLY INSEMINATING ANINIAL Donald W. Edwards, Dixon, Ill.
Application September 19, 1950, Serial No. 185,624
This invention appertains to improvements in animal impregnators or devices for artificially inseminating female animals.
The primary object of this invention is to effect an artifical insemination of female animals, without injuring the reproductive organs of the animal and without agitating the animal, while, at the same. time, permitting an effective impregnation to obviate repeated injections.
Another object of this invention is to provide an instrument for eiiecting artificial insemination, the instrument being of such a simple operating nature that it can be effectively employed, without the services of a trained technician.
In the accompanying drawing:
Fig-ure 1 is a longitudinal vertical sectional view of the preferred embodiment of this invention; 4
Figure 2 is an elevational view of another embodiment of this invention;
Figure 3 is a top plan view, and,
Figure 4 is a transverse sectional view taken on line 4-4 of Figure 1.
In impregnating female animals, instruments for the artificial insemination have been provided, which necessitate the employment of a tube brought into contact with the cervix. Such instruments offer a possibility of permanent injury to the reproductive organs and are complex in structure and operation, thereby necessitating the servies of a trained technician in administering the injection.
Also, such instruments do not afford means for withdrawing some of the mucus fluid from, the uterus and cervix and discharging the fluid back into the uterus and cervix, after the semen is forced into the organs by the pressure of the injected mucus fluid, both operations being of a simultaneous nature and affording a, greater degree of positive impregnation.
The impregnating instrument l0, which, due to the construction thereof, obviates the foregoing defects and permits the desirable method of insemination to be effected, includes an outer tubular member I2 having opposing open ends, one end 14 of which constitutes a discharge end and is adapted to be inserted into the vaginal vault in adjacency to the cervix.
A piston 16 is disposed within the tubular member and is provided with means I 8 for effecting, under manual pressure, an operational stroke thereof. The means 18 consists of a pair of U-shaped rods 26 which are axially disposed in the tube and extend operatively through the end 22 thereof.
The free ends of the legs of each rod are bent outwardly to form locking members 24 and 26, the free ends of the legs being inserted in bores 28 in the inner end of the piston and the members 24 being inserted in lateral or offset extensions 30 of the bores, the extensions being formed at the inner ends thereof. The suction stroke of the piston I 6, under actuation by the rod 20, moved outwardly from the tube by manual pressure, is limited by a stop 32 formed on the interior of the tube and laterally disposed therein for engagement with the inner end of the piston.
An axial passage 34 is centrally arranged in the piston it to accommodate an inner tube 36, which is slidably disposed therein. The tube 36 is formed with an outer discharge end 38 which is formed with an axially disposed discharge port or orifice 40. Finger grip members 42 and 44 laterally extend in opposite directions from an enlarged head 46a formed on the opposing end of the tube 36.
Means is provided for discharging semen from the tube 36, the means being of any type sufficient to create a discharging pressure in the tube and establish a pressure head rearwardly of the semen for ejecting the semen from the tube and through the orifice or port 40. A plunger 46 may be employed, as illustrated, the plunger being slidably disposed in the tube 36 and having an enlarged outer end 48.
In use, the instrument is placed in the vagina of the female animal, with the various compo nents in the relative position, as depicted in Figure 1. After complete insertion of the instrument, with the tube end I4 resting against the cervix, the piston i6 is initiated in its suction stroke by the rod 20 to draw the mucus fluid from the uterus of the animal into the discharge end of the tube [2, the piston l6 being limited in its suction stroke by the stop 32.
At that point in the operation, the mucus fluid will encompass the inner tube 36, within which semen has been previously placed, by the removal of the plunger 46 and the filling of the tube 36 to the desired point.
The plunger 46 is depressed in the tube 36 by gripping the finger grips 42 and 44 and applying manual pressure, as with the thumb, to the head 48. The semen is, thus, placed ahead of the mucus fluid and introduced into the vagina. The piston I5 is then initiated in its discharge stroke by depressing the rod 2|] to effectuate a discharge of the mucus fluid in back of the semen. The mucus fluid forms 9, pressure block or head to seal in the semen and direct its flow into effective placement in the uterus.
In Figure 2, another embodiment is illustrated, wherein, the instrument is similar in structure and operation to the instrument It! in Figure 1, with the discharge end and piston being altered in order to more conformably fit the vaginal canal and abut the cervix of some female quadrupeds, The discharge end 50 is beveled or curved obliquely and the outer end 52 of the piston is similarly configured.
Having thus described the invention, what is claimed is:
' 1. In an artificial insemination instrument, a hollow outer tube having opposing open ends, one
of said ends constituting a discharge end adapted to be inserted in the vaginal passage of a female animal andabutting the cervix, a piston workably mounted in the tube, means extending from said piston through the end of the outer tube opposed to the discharge end for moving said piston, stop on said tube limiting the movement of the piston from the discharge end so that fluid drawn into the tube from the uterus is positioned in the tube adjacent the discharge end, an inner tube concentrically arranged in the outer tube and slidably disposed through the piston, and means slidable in said inner tube for discharging semen in the inner tube from said inner tube into the uterus in advance of the fluid forced back into the uterus by the piston.
2. In an artificial insemination instrument, a
hollow outer tube having opposing open ends, one of said ends constituting a discharge end adapted to be inserted in the vaginal passage of a female animal and abutting the cervix, a piston workably mounted in the tube; means extending from said piston through the end of the outer tube opposed to the discharge end for moving said piston, a stop on said tube limiting the movement of the piston from the discharge end so that fluid drawn into the tube from the uterus is positioned in the tube adjacent the discharge end, an inner tube concentrically arranged in the outer tube and slidably disposed through the piston, and means for discharging semen in the inner tube from said inner tube into the uterus in advance of the fluid forced back into the uterus by the piston, said last means including a plunger slidably disposed in the inner tube and extending through the open end of the outer tube opposed to the discharge end.
DONALD W. EDWARDS.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 1,052,895 Curlee Feb. 11, 1913 1,118,040 Mulder Nov. 24, 1914 1,422,490 Stader July 11, 1922