Adjustable oral appliance

An oral appliance configured to urge a user's mandibular arch forward relative to said user's maxillary arch, comprising:

• a U-shaped upper tray configured to conform to the user's maxillary arch, said upper tray includes a curved front surface, a curved bottom surface, and two posterior sections;
• a U-shaped lower tray configured to conform to the user's mandibular arch, said lower tray includes a curved front surface and two opposite wing sections;
• a guide member extending downwardly from said curved front bottom surface of said U-shaped upper tray;
• a spacer positioned between said U-shaped upper tray and said U-shaped lower tray, wherein the spacer is defined by said U-shaped upper tray or said U-shaped lower tray;
• and
• a cord configured to slide freely inside said guide member, said cord defining opposed ends and having a coupler positioned at each of the opposed ends of said cord, each said end coupler configured to couple the respective end of the cord with a corresponding one of the opposite wing sections of said U-shaped lower tray, whereby when said cord is inserted into said guide member and said end couplers are attached to the opposite wing sections of said U-shaped lower tray, said cord is freely slidable through said guide member to automatically balance the pulling forces exerted by said cord on said opposite wing sections of said U-shaped lower tray.

An oral appliance, comprising;

• a U-shaped upper tray configured to fit over the maxillary arch of a wearer, said U-shaped upper tray includes a curved anterior surface and a curved bottom surface;
• a U-shaped lower tray configured to fit over the mandibular arch of the wearer, said U-shaped lower tray includes two opposite wings;
• an integrally formed spacer and cord guide, the integrally formed spacer and cord guide extending from the curved bottom surface of the U-shaped upper tray between the U-shaped upper tray and the U-shaped lower tray;
• a cord defining two opposed end regions each configured to couple with the opposite wings of said lower tray, said cord defining a central region configured to slide freely inside said cord guide and to self-adjust to exert balanced pulling forces on the opposite wings of said U-shaped lower tray, thereby maintaining the opposite wings of said U-shaped lower tray under and spaced apart from said U-shaped upper tray while the wearer sleeps.