Abstract: An electromagnetic vibrator for generating vibrations in bone conducting hearing aid devices. The vibrator includes a magnetic device, a vibrator plate and an inner spring member providing an air-gap between the magnetic device and the vibrator plate. The vibrator is housed in a casing and an outer spring is arranged between the vibrator and the casing to isolate movements of the magnetic device relative to the casing. The outer spring is part of the surrounding casing and is mechanically attached to the vibratory transmitting element via an elastic sealing element. The sealing function of the hearing aid housing is provided by the outer spring attachment.

Abstract: An implant device for bone anchored hearing aids of the type that include a screw-shaped anchoring element for anchorage in the bone tissue, an abutment sleeve for skin penetration and arranged to be connected to the fixture with a screw connection and a tool for installing the implant into the bone tissue. The fixture and the abutment sleeve are made as a pre-mounted unit that unit is arranged to be installed in one step by means of the tool, which is arranged to cooperate with a tool engaging portion on the abutment sleeve. This arrangement requires fewer pieces to handle for the surgeon during the installation, which means that the surgical procedure can be carried out in a simpler and predetermined way, at the same time as the advantages inherent in a two-piece implant device are maintained.

Abstract: A screw-shaped anchoring element for permanent anchorage of hearing aid devices or ear and eye prostheses in the skull bone. A main body including external threads has a length less than 5 mm and is operative to be inserted into a hole in a skull bone. A flange is operative to provide a stop for the anchoring element when the anchoring element is screwed down into the comparatively thin skull bone. The flange has a substantially planar bottom surface for resting against the skull bone when the anchoring element has reached a final screwed-down position. A tool engaging socket is arranged at one end of the anchoring element. An inner bore extends at least partially through the main body at the first end of the anchoring element and is operative to connect one of a hearing aid device, an eye prosthesis or an ear prosthesis to the anchoring element. A self-tapping second end of the anchoring element includes at least one cavity and a cutting edge.