Audio transducer with flexible foam enclosure
US5570429A · kind A · utility
12Cited by
7References
28Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 3, 1995 |
| Grant date | Oct 29, 1996 |
| Priority date | — |
| Expiry date | Feb 3, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R7/127
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An audio transducer includes a rigid base plate and a flexible foam element attached to the plate. The foam element has a "B" shaped cross section, with a plastic film diaphragm conformally attached to the dual semi-cylindrical front surface of the foam element. The foam element defines a large circular bore for receiving a magnet assembly attached to the plate, with a electrical coil attached to the diaphragm and received within a gap defined within the magnet assembly. The plate and diaphragm are sealed to the foam element to provide an environmentally sealed chamber within the bore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.