EAR TAG APPLICATOR

Abstract: An animal ear tag applicator (1) has a jaw (2) with a pivotal pin (7) which can hold the male part (50) of an animal ear tag and engage it with the female part (51) of the tag held in the lower jaw (3). The jaw (2) is biased by spring (16) to open independently of the handles (4, 5) once the latch (30) has been released. This will only occur after the male and female parts of the tag have been fully engaged. This independent release of the jaw (2) and the ability of the pin (7) to pivot forwardly avoids jamming of the ear tag in the applicator (1), especially when the animal attempts to pull away. The applicator can also be used with single piece tags.

Description: EAR TAG APPLICATOR BACKGROUND OF THE INVENTION This invention relates to an ear tag applicator for the application of ear tags to animals such as cattle and the like for identification. A number of ear tag applicators are already well-known in the art and disclosed in various patent specifications. When considering those that relate to applicators for the placement of two-piece ear tags, a variety of methods have been sought for releasing the ear tag once applied. The simplest versions are plier type applicators in which the handles are biased away from each other so that the jaws pivot to an open position as the handles similarly pivot away from each other to release the ear tag. If the animal should move while this is taking place, damage can be caused to the animal's ear. With the handles requiring manual closing, the biasing means cannot open the jaws of the applicator until the user releases pressure on the handles and this creates some delay. To overcome this problem, various applicators for two-piece ear tags have provided pins engaging the male portion of the tag which can release from the male tag. Such mechanisms are not always reliable and there is a tendency for the pin to become locked into engagement with the male tag once it has engaged with the female tag when the animal pulls away jamming the jaws of the applicator. The present invention will be particularly described with respect to two piece ear tags which will be referred to as comprising a male and a female tag for simplicity, although these together form part of a single tag. However, it is to be appreciated that the present invention could be readily used with a single piece ear tag where the animal's ear provides the resistance to the tag pulling out. OBJECT OF THE INVENTION Therefore, it is an object of the present invention to provide an animal ear tag applicator which will overcome some of the disadvantages of the prior art or at least provide the public with a useful choice. STATEMENTS OF INVENTION Accordingly, in a first aspect, the invention may broadly be said to consist in an animal ear tag applicator comprising: 10 a first jaw portion to engage a portion of an animal ear tag; a second jaw portion; first and second handle portions to move said first and second jaw portions such that movement of said first handle portion with respect to ■]_5 said second handle portion drives the first and second jaw portions towards each other to engage said portion of said ear tag with an animal's ear; biasing means to bias said jaw portions to an open position; and wherein said first jaw portions can move under the action of the biasing 20 means to an open position independently of said handle portions but only after the portion of the ear tag has fully engaged with the animal's ear. Preferably said first jaw portion is provided with an elongate engagement means to engage within a cavity of said portion of said ear tag. Preferably said elongate engagement means is adapted to move 25 outwardly from said first jaw portion in response to a force transverse to .said elongate engagement means. Preferably said elongate engagement means is pivotally connected to said first jaw portion or has some flexibility to allow at least partial rotation of said elongate engagement means outwardly from said applicator. Preferably said first jaw portion is disconnected from corresponding motion with said handle portions only after said portion of the ear tag has fully engaged with the animal's ear such that said first jaw portion may rotate about a common pivot axis to said open position independently of said handle portions. Further aspects of this invention may become apparent to those skilled in the art upon reading the following description. BRIEF DESCRIPTION OF THE DRAWINGS The description will now be provided with reference to the drawings in which: FIGURE 1 : shows a perspective view of one embodiment of the applicator; FIGURE 2: shows an exploded view of the parts of the apparatus in Figure 1 ; FIGURE 3: shows a cross-sectional elevation through the apparatus of Figures 1 and 2; FIGURE 4: shows perspective view of a further embodiment of an applicator; FIGURE 5: shows a cross-sectional view through the embodiment of Figure 4; FIGURES 6A & 6B: show respectively side and end cross sectional views of the jaw/pin assembly of figures 4 and 5; FIGURE 7: shows an exploded view of the embodiment of figures 4 to 6; FIGURE 8: shows the embodiment of Figures 4 to 7 with its pin pivoted outwardly; FIGURE 9: shows the embodiment of Figures 4 to 8 in its jaw-closed position with an ear tag in place; FIGURE 10: shows the applicator of Figure 9 before the jaws have closed; and FIGURE 1 1 : shows the applicator of Figures 9 and 1 0 after the pin has released from the tag. DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS Referring to Figures 1 to 3 of drawings, the applicator 1 is shown with a first jaw 2 and a second jaw 3 which may respectively engage first and second or male and female parts 50, 51 of a two piece ear tag or alternatively a single piece tag (not shown). Upon the jaws 2, 3, being moved towards each other, the portions of the ear tag can be engaged on opposed sides of the animal's ear to retain the tag in the animal's ear. In this particular embodiment, movement of the first and second jaw portions 2, 3 is provided by manipulation of first and second handle portions 4 and 5 respectively. As the handle portions 4 and 5 are drawn towards each other, the jaw portions 2 and 3 are moved towards a closed position in which engagement of the ear tag can take place. In Figure 1 , the jaw portions 2 and 3 are shown in an open position. Although the handle portions and jaw portions are provided as part of a pliers type arrangement, other configurations are possible. Other forms of handles may be provided with differing actions to drive the first and second jaws towards each other. However, the pliers type arrangement with the handles and jaws acting about a common pivot 6 is preferred for simplicity. It can be seen that the first jaw portion 2 may be provided with an elongate engagement means 7 suitably in the form of a pin, which is provided to engage within a cavity of a male tag 50 and drive that tag towards the second jaw 3 and the female tag 51 retained by the retention means 8. As I Q shown particularly in the cross section in Figure 3, retention means 8 may be in the form of a pivoting plate 8 and the female tag 51 may be placed in the cavity 9 underneath the plate 8 to be retained in place. If desired, suitable biasing means such as a spring 1 0 can be provided to place some pressure on the female tag 51 contained in the cavity 9 and retain the tag 51 in place. As shown on Figure 2, although the handle portions 4 and 5 and jaw 5 portions 2 and 3 are provided with a common axis being the pivot axis 6, at least one of the jaw portions 2, is capable of independent movement relative to the handle portions towards the open position. In this particular example, it is the first jaw 2 which is provided as a separate portion to the driving handle portion 5. Referring to the cross section shown in Figure 3, it can be seen that the 0 lower jaw 3 is provided integral with the handle portion 4 so that these two provide a static relationship about the pivot axis 6. The upper or first jaw portion 2 is connected to or is integral with a rotating latch 1 1 acting about the pivot axis 6. It can be seen that as the second handle portion 5 is drawn towards the first handle portion 4, an engagement means 1 2 pivoted at 14 provided on this second handle portion 5 engages the rotating latch 1 1 to drive the first jaw 2 towards a closed position. As the handle portion 4 approa ' ches the closed position with the handle portion 5, it can be seen that releasing means 1 3 which, in this form, is provided as a downwardly projecting portion from the handle portion 4, can engage engagement means 1 2 and rotate the engagement means 1 2 about its own pivot axis 1 4 to a position where the engagement means 1 2 no longer engages rotating latch 1 1 . The first jaw 2 is then free to rotate about the pivot axis 6 independently of the handle portion 5. The catch or other engagement means 1 2 is shown biased by spring 52 into a position engaging with the latch 1 1 . The interrelationship of the projection 1 3, the latch 1 1 , catch 1 2 and the movement of the pin 7 with the male tag 50 is such that only after the male tag 50 is fully engaged with the female tag 51 will the jaw 2 be released. Biasing means are provided to bias the first jaw 2 towards the open position. Biasing means may be provided in a number of alternative forms. Generally, the biasing means may be provided as some form of spring and can comprise such configurations as a compression spring 1 5 between the first and second jaw portions, a tension spring 1 6 acting between the first jaw 2 and the handle portion 4 or a circular spring (not shown) acting around the pivot axis 6. The particular form of biasing means can be varied as required. However, a tension spring 1 6 as shown may be preferred to reduce the complexity of the apparatus around the pivot axis 6 if a spring acting around that pivot 6 were used, and to leave the area between the jaws free as may be more difficult with a compression spring 1 5 as shown. Another biasing means such as a compression spring 29 may be used to bias the handles 4, 5 into an open position as a user releases pressure on the handles. Again, the biasing means 29 may be provided in a variety of forms including a variety of springs. Once the engagement means 1 2 is disengaged from the rotating latch 1 1 , the first jaw portion 2 is free to rotate to the open position under the influence of the biasing means. In the configuration as shown, the first jaw portion 2 withdraws until contact is made with the bearing surface 1 7 on an adjacent end of the first handle portion 4. This contact between the first jaw 2 and the bearing surface 1 7 defines the extent of rotation of the first jaw portion 2 towards the open position. However, to reduce shock in the handle portion 4 as a result of the first jaw portion 2 hitting the bearing surface 1 7, shock absorbing means 1 8 may be provided to act between first jaw 2 and the bearing surface 1 7. The use of some resilient material in this portion may be sufficient to reduce the shock through the apparatus as the apparatus reaches the open position. In alternative forms, rotation of the rotating latch portion 1 1 with the first jaw portion 2 can be utilised to stop the first jaw portion 2 hitting the handle portion 4. In such an embodiment, a second bearing surface on the engagement means 1 2 may be provided such as a further protrusion 1 9. In this instance, when the handles approach the closed position and the engagement portion 1 2 is rotated from its initial engagement with the rotating latch 1 1 , the first jaw 2 will rotate until the rotating latch portion 1 1 bears on the second engaging portion 1 9. Alternatively a projection on latch 1 1 to hit or drive the face of catch 1 2 may be used. This may be preferred in order to remove contact between the first jaw portion 2 and the handle portion 4 entirely. Also referring to Figure 3, it can be seen that the elongate engagement means or driving pin 7 may be provided at such a forward facing angle, A°, to the first jaw portion 2 so that, as the jaw portions rotate about the pivot axis 6 towards the closed position, the pin 7 may be substantially perpendicular to the lower jaw 3 when the tip 20 of the pin 7 has travelled almost to the plate 8. This is so that the pin 7 is approximately perpendicular as the tip 20 of the male tag 50 contacts the animal's ear. This is the point at which the greatest strength is required in the pin 7 to commence the piercing of the ear. Further rotation to the fully closed position in which the male tag 50 fully engages the female tag 51 held in cavity 9, rotates the pin 7 past the perpendicular to improve secure engagement of the two portions of the tag. It has been found that with the present geometry, an angle of approximately 1 8° to 20° , possibly slightly higher or lower, from perpendicular is a suitable angle between the pin 7 and the lower jaw 3 when pin 7 is in the fully closed position. The angle may vary according to the particular arrangement and the orientation about the pivot axis 6. Referring to Figure 2, it may be desirable to provide the rotating latch 1 1 as one or more portions of hardened material such as the two portions shown in Figure 2 which are themselves provided on the common pivot axis 6. The use of hardened or hard material for the latch 1 1 may be beneficial particularly if the majority of the apparatus is made from such materials as plastic materials and these may wear in time. An alternative construction may make many of the components from metals and, particularly such a metal as aluminium to reduce weight. Similarly, the engagement means 1 2 may be provided from a hard material and in two portions as shown in Figure 2. In one embodiment spring or biasing means may be used to both open the handles 4, 5 and relocate the catch 1 2 into a position to again contact latch 1 1 or these two steps may be performed by separate springs or other biasing means as previously described. Thus it can be seen that the invention provides an applicator for animal ear tags which allows independent movement of at least one of the jaw portions under the influence of the biasing means once the jaws have reached closed position at which the male and female tags are fully engaged and the ear tag is fully inserted. This reduces the need to open the handle portions 4 and 5 to disengage the applicator from the ear tag. Also, there is no need to provide for the engaging portion 7 itself the ability to release the ear tag while the jaws are still in the closed position. A further embodiment of the invention is shown in Figures 4 to 1 1 , the same reference numbers as used previously being retained where appropriate. In this embodiment, the applicator 1 , is provided in much the same manner as the previous embodiment with the first jaw 2 being provided as a retractable jaw which is released from its direct rotational connection to the handles 4, 5 so that it can rotate to the open position independently of the handles 4, -5 under suitable biasing means. In this embodiment however, the elongate pin 7 is mounted on a mounting block 22 which itself is pivotally mounted by a pivotal connection 23 to the first jaw 2. As can be seen particularly in Figure 8, this allows the elongate pin 7 to rotate outwardly from the first jaw 2 in the direction of the arrow shown in Figure 4. Referring principally to Figures 5, 6 and 7, it can be seen that the mounting block 22 is pivotally mounted so that the longitudinal axis of the elongate pin 7 passes behind the pivot axis 23. In this manner, the longitudinal force along the elongate pin 7 during the tagging process helps to stabilise the elongate pin 7 in its proper position for insertion rather than encouraging it to rotate outwardly. As force is applied to the elongate pin 7, it is supported by the pivot axis 23 and the lip 24 of the mounting block 22. The lip 24 engages against the first jaw 2 so as to prevent counter-rotation of the elongate pin 7 from the position in which it drives the two piece ear tag together. It can be seen that the mounting block 22 is provided with a cammed surface 25 which acts against a resilient member 26 to further stabilise the mounting block 22. However, upon application of a lateral force to rotate the elongate engagement means 7 outwardly, the surface 25 can move against the resilient member 26 to allow such outward rotation. The member 26 biases the mounting block 22 into the pin insertion position, however, once overcome and the member 26 lies adjacent alternate surfaces of the mounting block 22, it can bias the mounting block 22 such that the elongate pin 7 is directed outwardly from the first jaw 2 and generally parallel with the overall direction of the first jaw 2, as shown in Figure 8. The manner in which the resilient member 26 acts against the cammed surface 25 of the mounting block 22 allows the mounting block 22 to rotate partially toward the outward direction in the direction of the arrow x and still be biased to its stable position as shown in Figure 5 should that be all the rotation required to free pin 7 from the male tag 50. In an alternative embodiment rather than being pivotal the mounting for the pin 7, or the pin itself, could be at least partially flexible to again permit a forward rotation flowing of the pin 7 facilitating its release from the male tag 50. In providing a combination of an independently retractable upper jaw 2 and a pivotally or flexibly mounted elongate pin 7, this preferred embodiment reduces the likelihood of the ear tags 50, 51 jamming in the applicator 1 \ causing damage to an animal's ear should it try to move away during the tagging process. The two separate modes of release coact together. The retractable upper jaw 2 as described in the first embodiment, may still have a tendency to jam should the animal pull away during the tagging process. With a fixed elongate pin 7, the embodiment shown in Figures 1 to 3 can have trouble releasing the elongate pin 7 from the male tag 50 as the pin 7 is jammed against the sides of the cavity in the male tag 50 in which it sits. In the embodiment of Figures 4 to 1 1 with the independent retraction of the first jaw 2, even minimal movement of the elongate pin 7 in the direction of arrow X limits the force that an animal pulling on the ear tag by moving its ear 53, shown in Figure 9 in outline, can exert on the pin 7 to jam it in the male tag 50 and inhibit retraction. Full pivotal movement of the pin 7 to a horizontal position may not be necessary to improve the performance; even minimal movement to allow some lateral force to be accommodated may reduce the likelihood of jamming. Although this preferred form refers to pivotal movement of the elongate engagement means 7, as mentioned previously some form of lateral flexibility or movement may be all that is required to limit the force that the ear tag can apply against the pin 7. Similarly, when considering the outward rotation of the elongate pin 7 about the pivot 23, this may occur simultaneously with some retraction of the first jaw 2 which may accommodate the slight increase in depth the pin 7 reaches within the male tag 50 during the start of the rotation. Referring particularly to Figure 7 the latch 1 1 of figures 1 to 3 has been replaced by an integral latch 30 provided at the pivoting end of the jaw 2 ' . The latch 30 fits between the bifurcated end 31 of the handle 5. The latch 30 includes a recess 39 into which a discrete member 33 of a hard material can be inserted to provide the surface engaged by the tip 38 on the catch 34. The catch 34 is biased into that engagement by a spring 36 mounted between a projection 37 on handle 5 and a recess 35 in the catch 34. In the position shown in Figure 5, the end of the projection 1 3 has just engaged the surface 40 of the catch 34 to start its pivoting and its release of the latch 30. At the time of that release the pin 7 will have moved further downwardly from the position shown in Figure 5 to ensure full engagement of the male tag 50 with the female tag 51 . Referring particularly to Figures 6A,. 6B it will be seen that the tip 25 can abut the edge 28 of the jaw 2 when the pin 7 has been moved to its fully horizontal position. Also, while the resistance to the movement of the tip 25 passed the tip 27 of the member 26 may rely on the resilience of the member 26 and its pivoting about pivot pin 42, it is envisaged that a biasing means such as a spring may be used with member 26 which in some embodiments may therefore not itself be resilient. A resilient stop 49 is shown provided for the end of the handle 4 to provide an abutment against the handle 5. 10 Therefore, it can be seen that in this further embodiment, not only are two modes of release of the ear tag provided but the different modes assist each other to reduce the risk of jamming in either mode. Where in the foregoing description reference has been made to specific π c components or integers of the invention having known equivalents then such equivalents are herein incorporated as if individually set forth. Although this invention has been described by way of example and with reference to possible embodiments thereof it is to be understood that modifications or improvements may be made thereto without departing from the scope of the invention as defined in the appended claims. 20 25

Claims: CLAIMS 1 . An ear tag applicator including: . . . • ■ , a first jaw portion to engage a portion of an animal ear tag; a second jaw portion; first and second handle portions to move said first and second jaw portions such that movement of said first handle portion with Q respect to said second handle portion drives the first and second jaw portions towards each other to engage said portion of said ear tag with an animal's ear; biasing means to bias said jaw portions to an open position; and wherein said first jaw portion can move under the action of the biasing means to an open position independently of said handle portions but only after the portion of the ear tag has fully engaged with the animal's ear. 2. An ear tag applicator as claimed in claim 1 wherein said first jaw portion is provided with an elongate engagement means to engage within a cavity of said portion of said ear tag, said elongate engagement means being adapted to move outwardly from said first jaw portion in response to a force transverse to said elongate engagement means. 3. An animal ear tag applicator as claimed in claim 2 wherein said elongate engagement means is pivotally or flexibly connected to said first jaw portion to allow at least a partial rotation of said elongate engagement means outwardly from said first jaw portion. 4. An ear tag applicator as claimed in claim 3 wherein said elongate engagement means is provided on a mounting means pivotally connected at an end of said first jaw portion, said first jaw portion including a resilient engagement means biasing said elongate engagement means into its position extending downwardly from said first jaw portion. 5. An ear tag applicator as claimed in claim 4 wherein said mounting means and said resilient engagement means have one or more engagement surfaces adapted to hold said elongate engagement means in either its downward or rotated positions. 6. An ear tag applicator as claimed in any one of the preceding claims wherein said first jaw portion is provided with, or is operatively connected with, a latch means, the latch means being disengaged only after the ear tag has been fully engaged with the animal's ear to then enable the first jaw portion to move to its open position independently of Q the handle portion. 7. An ear tag applicator as claimed in claim 6 wherein a catch means is provided on, or is operatively associated with, said second handle portion, said catch means holding said latch means in its latched position, a catch operating means being provided on, or operatively connected with, said first handle portion so that as the ear tag is becoming fully engaged the catch operating means will engage with said catch means to move said catch means out of engagement with said latch means. 8. An ear tag applicator as claimed in claim 7 wherein said latch means is provided as an inner end portion of said first jaw portion. 9. An ear tag applicator as claimed in claim 7 or claim 8 wherein said latch means includes a discrete member of hard material to engage with said catch means. 1 0. An ear tag applicator as claimed in any one of claims 7, 8 or 9 wherein said catch operating means includes a projection provided on said first handle portion an end of which projection being engageable with said catch means. 1 1 . An ear tag applicator as claimed in any one of the preceding claims wherein an end of said first handle portion adjacent said first jaw portion is provided with a bearing surface to stop further rotation of said first jaw portion under the action of said biasing means to define the open position of said first jaw portion. 1 2. An ear tag applicator as claimed in claim 1 1 wherein shock absorbing means are provided between said first jaw portion and said first handle portion at or adjacent said bearing surface to inhibit shock forces through said first handle portion when said first jaw portion is rotated to said open portion. 1 3. An ear tag applicator as claimed in any one of the preceding claims wherein said elongate engagement means is a pin the longitudinal axis of which passes behind a pivotal axis of the pin. 14. An ear tag applicator as claimed in claim 1 3 wherein the longitudinal axis of the pin is angled forwardly of the longitudinal axis of the first jaw portion such that the pin is substantially perpendicular as the tag becomes fully engaged. 1 5. An ear tag applicator as claimed in claim 1 3 or claim 14 wherein the pin rotates beyond the perpendicular before the first jaw portion is released to move to its open position. 1 6. An ear tag applicator as claimed in claim 1 5 wherein the pin is at an angle of between approximately 1 8 ° to 20° from the perpendicular when it is in its fully closed position. 1 7. An ear tag applicator as claimed in any one of the preceding claims wherein said portion of said animal ear tag is a male portion of said ear tag which is engageble with a female portion of said ear tag engagable with said second jaw portion. 8. An ear tag applicator substantially as herein described with reference to Figure 1 to 3 or Figures 4 to 1 1 of the accompanying drawings.

Inventors: BLADEN ROY VICTOR, GARDNER MICHAEL STUART, BLADEN, ROY, VICTOR, GARDNER, MICHAEL, STUART
Applicants: BLADEN ROY VICTOR, GARDNER MICHAEL STUART, BLADEN, ROY, VICTOR, GARDNER, MICHAEL, STUART
Application year: 1997
Main classification: A61B17
IPC codes: A01K11