OFFSET ANATOMICAL MOUTHPIECE

Abstract: A mouthpiece 10 for use in diving or medical equipment, amoung others made of moldable resilient material having an offset 4 between upper and lower jaw and a bite plane 2 which is tapered with the bite plane formed by wings 3 which have varying thickness to create the taper.

Description: The present application relates to mouthpieces which are used in underwater breathing devices such as snorkels and regulators and to mouthpieces which are used in inhalators and gastric tubes for medical treatment. Such an asymmetrical mouthpiece is shown in US-A-4 466 434 and comprises an offset or lip between the upper and lower portions. Bite lugs or internal wing members on the legs of the U shape are shown which are of constant thickness and width and which are connected to each other by a ledge which forms the offset between the upper and lower portion to form a place for the upper front teeth to rest. In spite of the fact that this mouthpiece constitutes an improvement over other known mouthpieces as shown f.i. in US-A-3 415 245 which are symmetrical on their upper and lower surfaces with bite lugs which are of constant thickness and width, the mouthpiece of US-A-4 466 434 is not adaptable for both overbite and underbite conditions. The US-A-4 466 434 mouthpiece cannot be used with comfort in an underbite condition because of the ledge formed between the bite lugs. The object of the present invention is to provide a mouthpiece giving more people more comfort while using it and to increase safety due to a better fit of the mouthpiece. This object is obtained by the features set out in claim 1. Advantageous developments of the mouthpiece are set out in the subclaims. The present invention provides a mouthpiece with an offset between upper and lower jaws combined with tapered bite lugs and a particular bite plane which can be used by persons who require a mouthpiece such as divers and medical patients which mouthpiece does not distort the normal rest position of the jaw bones and jaw muscles including but not limited to the ball joint assembly in the jaw. The present invention provides a mouthpiecewhich can be used with comfort by persons who have either an overbite or an underbite condition. The invention is described in detail in the following with reference to embodiments shown in the drawings, wherein: Fig. 1 shows a top view of one embodiment of the mouthpiece. Fig. 2 shows a front view of the embodiment shown in Fig. 1. Fig. 3 is a rear view of the embodiment shown in Fig. 1. Fig. 4 is a view partially in section taken along the lines A-A shown in Fig. 2. Fig. 5 and 6 are respectively top and rear views of a second embodiment of the mouthpiece. Fig. 7 and 8 are top and front views of a third embodiment of the mouthpiece. Fig. 1 shows a top view of one embodiment 10 of the mouthpiece according to the present invention formed of a moldable resilient material in which a standard coupling 1 is formed on one end. As shown in Fig. 2, the coupling 1 has an orifice 20 to permit the passage of a gas. On the other end of the U shaped body 6 which is formed into two legs, internal wings 3 are formed in either side of the generally U shaped body 6 on the inside thereof. A biteplane is designated with 2. The wings 3 have a taper as shown by the different thickness dimensions 30 and 40 which are different by about 2 (1-4) mm. The internal wing members 3 range from 6 to 12 mm in width, 14 to 40 mm in length and 2 to 8 mm in thickness and may be formed of a material which will conform to the shape of the user's teeth. Fig. 4 shows a side view partially in section in which the offset nature of the mouthpiece is illustrated. A offset or lip 4 is formed on what is shown in this drawing as the lower portion of the U shaped body 6. The width 50 of the lip ranges from about 1 to about 14 mm depending on the amount of overbite or underbite the user has. Because the lip only slightly exeeds the extent of the orifice 20 and does reach to the internal wings 3, the inventive device can be used by persons with either an overbite or underbite. The lip 4 extends to the lower level of the wing 3 in a mouthpiece oriented for use with an overbite. Naturally, if the mouthpiece were oriented for use with an underbite, the lip 4 would extend to the upper level of the wing 3. This further could simply be obtained by turning over the mouthpiece as shown in Fig. 4 by 180 degrees about the horizontal median line of this Figure. Fig. 5 and 6 show top and front views of a second embodiment of the present invention in which a stiffener 5 formed in the same general U shape is added to the body member 60 of the mouthpiece. The stiffener 5 may be formed of a rigid or slightly resilient material. Fig. 7 and 8 show top and front views of a third embodiment of the present invention. This embodiment is substantially identical with the first embodiment shown in Fig. 1 through 4 except that clips 7 are attached to the mouthpiece 10 as shown in Fig. 7 and 8. A line or lanyard 8 may be attached to the clips. The outer edge of the U shaped structure has a rolled edge 61 formed thereon as shown in Fig. 7 and 8 to provide a convenient gripping surface for the clips 7. A channel or slot 9 may be formed in either the upper or the lower surface of the U shaped body member 600 to permit its removal without disconnecting any tubes which may be fitted for the user. This mouthpiece further protects such tubes from being pinched off by the teeth of the user. The present invention has been described with reference to particular embodiments. However those skilled in the art understand that many changes and modifications of those embodiments are possible which are within the scope of the present invention.

Claims: A mouthpiece comprising: an U shaped body member (6;60;600) having first and second ends and upper and lower portions; the first end forming a coupling (1) of generally oval shape in cross section and having an orifice (20) formed therein; the second end extending away from the orifice (20) and forming the two leg members of said U shape, each leg member having a free end; an internal wing member (3) formed on the inner side of each leg member near the free end thereof; the lower portion of the U shaped body member (6;60;600) extending outwardly toward the leg members more than the upper portion of the U shaped body member (6;60;600) to form an offset (4); characterized in that: the internal wing members (3) have a taper such that, in a direction from the orifice (20) to the free ends of the leg members, first ends farther from the orifice (20) have a thickness (30) smaller than the thickness (40) of second ends nearer the orifice; A mouthpiece as claimed in claim 1 wherein the offset (4) extends up to a level below the internal wing members (3). A mouthpiece as claimed in claim 1 or 2, wherein the width (50) of the offset (4) ranges from 1 to 14 mm. A mouthpiece as claimed in any of the claims 1 through 3, wherein the offset (4) only slightly exeeds the extent of the orifice (20) and does not reach the internal wing members (3). A mouthpiece as claimed in any of the claims 1 through 4, wherein the internal wing members (3) are formed of material adapted to conform to the bite of the user. A mouthpiece as claimed in any of the claims 1 through 5, including further an internal stiffener (5) formed in the U shaped body member (60). A mouthpiece as claimed in any of the claims 1 through 6, wherein: the U shaped body member (600) has an outer edge formed into a rolled edge (61); clip members (7) attached to the rolled edge (61). A mouthpiece claimed in any of the claims 1 through 7, wherein a channel (9) is formed through the U shaped member upper or lower portion for permitting the removal of tubes without disconnection. A mouthpiece as claimed in any of the claims 1 through 8, wherein the internal wing members (3) have a range in size from 6 to 12 mm in width, from 14 to 40 mm in length and from 2 to 8 mm in thickness.

Inventors: KINKADE, DONALD JAMES
Applicants: KINKADE, DONALD JAMES
Application year: 1989
Main classification: B63C11
IPC codes: B63C11, A61M16