A bit includes a mouthpiece. A tongue member is arranged on the mouthpiece such that, when the mouthpiece is received in an oral cavity of an animal, the tongue member bears against a tongue of the animal, inhibiting movement of the tongue over the mouthpiece.
1. A bit which comprises
a mouthpiece having two mouthpiece members; and
a tongue member arranged on the mouthpiece such that, when the mouthpiece is received in an oral cavity of an animal, the tongue member bears against a tongue of the animal,
each mouthpiece members defining a corresponding set of interlocking engagement teeth, the interlocking engagement teeth of one of the sets being configured to push against the interlocking engagement teeth of the other set such that the movement of one mouthpiece member in a first direction causes the other mouthpiece member to move in a second direction opposite to the first direction to thereby maintain the tongue member in a central position over the animal's tongue during movement of the mouthpiece members.
2. A bit as claimed in claim 1 , in which a position of the tongue member is adjustable with respect to the mouthpiece.
3. A bit as claimed in claim 2 , wherein the mouthpiece includes a pair of elongate mouthpiece members complementarily engaged together and the tongue member defining apertures, the bit further comprising:
a fastener for extending through the mouthpiece members and the apertures to fasten the mouthpiece members to the tongue member.
4. A bit as claimed in claim 3 , wherein the apertures are arranged in two rows, and the mouthpiece members define passages which can be aligned with respective rows to receive the fastener.
5. A bit as claimed in claim 4 , wherein the fastener includes a cover from which a pair of posts can extend through the passages, the cover restricting a pivotal range of motion of the mouthpiece members, the cover being configured to hold the two sets of interlocking engagement teeth together in engagement in the event of a post failure.
6. A bit as claimed in claim 3 , further including rings at either end of the mouthpiece to which a bridle and reins can be attached.
7. A bit as claimed in claim 2 , wherein a surface area of the tongue member has a lower frontal portion connected to a higher rear portion, with each portion oppositely tapering to a rounded apex.
8. A bit as claimed in claim 2 , wherein the tongue member has a generally Z-shaped profile.
9. A bit as claimed in claim 1 , in which the tongue member is fastened to the mouthpiece with a fastening arrangement.
10. A bit as claimed in claim 9 , in which the tongue member is in the form of a plate with a number of perforations to accommodate the fastening arrangement, the perforations being configured so that selection of perforations can provide adjustability of the plate with respect to the mouthpiece.
11. A bit as claimed in claim 1 , in which the tongue member is pivotal with respect to the mouthpiece, the mouthpiece being operatively arranged intermediate front and rear edges of the tongue member such that, when a frontal portion of the tongue member is urged towards a roof of the oral cavity, a rearward portion presses onto the tongue to inhibit excessive pulling by the animal.
12. A bit as claimed in claim 1 , wherein the two mouthpiece members are each in direct contact with the tongue member, while the interlocking engagement teeth maintain the tongue member in the central position over the animal's tongue.
13. A bit as claimed in claim 1 , wherein the tongue member includes a raised lip about its periphery.
14. A bit as claimed in claim 1 , wherein a surface area of the tongue member is bent.
15. A bit as claimed in claim 14 , wherein the tongue member is curved.
16. A tongue member for a bit, the tongue member capable of being fastened to a mouthpiece of the bit and being configured so that, when the mouthpiece is received in an oral cavity of an animal, the tongue member bears against a tongue of the animal, inhibiting movement of the tongue over the mouthpiece, the mouthpiece having two mouthpiece members, each mouthpiece member defining a corresponding set of interlocking engagement teeth, the interlocking engagement teeth of one of the sets being configured to push against the interlocking engagement teeth of the other set such that the movement of one mouthpiece member in a first direction causes the other mouthpiece member to move in a second direction opposite to the first direction to thereby maintain the tongue member in a central position over the animal's tongue during movement of the mouthpiece members.