Hearing-aid anchoring element
OwnerPatrik Westerkullinventor
Life of this patent
Estimating the term…
Abstract
A hearing aid anchoring fixture (104) for anchoring a direct bone conduction hearing aid (108) to the skull bone (106), comprising a threaded portion (110) that has at least one cutting edge (118). Each cutting edge (118) has an adjacent cavity (120) having a volume Vc. The threaded portion (110) has a thread depth dt being half of the difference between the maximum outer diameter d1 of the threaded portion (120) and the inner diameter d2 of the thread, where dt is at least 10% of the maximum outer diameter d1 of the threaded portion (110) and where dt is less than 20% of the maximum outer diameter d1 of the threaded portion (110). The fixture (104) may be equipped with a flange portion (114) that has an outer diameter d3 being greater than the maximum diameter d1 of the threaded portion (110).
Claims11
A hearing aid anchoring fixture for anchoring a direct bone conduction hearing aid to a skull bone, comprising:
- a threaded portion having a cutting edge, the cutting edge having a cavity defined therein, the cavity being adjacent to the cutting edge and having a volume Vc;
- the threaded portion having a maximum outer diameter d1 and an inner diameter d2;
- a thread having a thread depth dt being half of a difference between the maximum outer diameter d1 of the threaded portion and the inner diameter d2 of the thread, where dt is between 10% and 20% of the maximum outer diameter of the threaded portion,
- the threaded portion having a surface layer, the surface layer having a thickness greater than 100 nanometers;
- and
- a flange disposed at one end portion of the hearing aid anchoring fixture, the flange having a surface facing the threaded portion, the surface having a groove defined therein, the hearing aid fixture having a thread pitch tp, in an interval 0.5 mm≦tp≦0.8 mm.
A hearing aid anchoring fixture for anchoring a direct bone conduction hearing aid to a skull bone, comprising:
- a threaded portion having a cutting edge, the cutting edge having a cavity defined therein, the cavity being adjacent to the cutting edge and having a volume Vc;
- the threaded portion havinga maximum outer diameter d1 and an inner diameter d2;
- a thread having a thread depth dt being half of a difference between the maximum outer diameter d1 of the threaded portion and the inner diameter d2 of the thread. where dt is between 10% and 20% of the maximum outer diameter of the threaded portion;
- the threaded portion having a surface layer, the surface layer having a thickness greater than 100 nanometers;
- and
- a flange disposed at one end portion of the hearing aid anchoring fixture, the flange having a surface facing the threaded portion, the surface having a groove defined therein;
- The surface layer including titanium oxide having a thickness that is at least 100 nm, the titanium oxide surface layer having a porous structure.
Dependencies are inferred from the claim text.