Hearing device for a protective helmet
Patent 5073947 Issued on December 17, 1991. Estimated Expiration Date: 
October 23, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 23, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3088002 3190973 3512088 3752939 Piezoelectric bone conductive in ear voice sounds transmitting and receiving apparatus Protective helmet with voice communication system Wireless transmitting and receiving systems including ear microphones Infrared headphones for the hearing impaired Speaker mounting for lined helmet Patent #: 4636592 InventorsAssigneeApplicationNo. 425696 filed on 10/23/1989US Classes:381/380, Ear insert or bone conduction181/135, Ear insert381/313, Directional381/322, Specified casing or housing381/328, Ear insert381/376HeadgearExaminersPrimary: Dwyer, James L.Assistant: Chan, Jason Attorney, Agent or FirmInternational ClassesH04R 025/00A61B 007/02 Foreign Application Priority Data1988-10-22 DEAbstractThe invention concerns a hearing device for a protective helmet with a receiving deice for auditory signals, that at the very least are deliverable from the earphones arranged on the inner surface of the protective helmet. The invention has as its basic function to reduce the volume of the helmet contruction and the weight of the hearing device in relation to the usual construction, and to make the positioning of the earphones on the ears of the helmet wearer unnecessary. The purpose will be met in that the earphones in the outer auditory canal of the helmet wearer will be developed as importable earplugs. The auditory signals that are supplied by a receiving device consisting of a receiver and a coupled transmitter will be transmitted from the transmitter of the receiving device over a wireless transmission line that is integrated into the earplug-receiver of the earplug. | |
