Semiautomatic retractable antenna apparatus
US5243355A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1992 |
| Grant date | Sep 7, 1993 |
| Priority date | — |
| Expiry date | Nov 13, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/244
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An antenna apparatus for a radiotelephone (100) comprises a shroud (207), an antenna (209) and releasable latch means (231, 219, 223, 229). The shroud (207) is movable between a first and a second position. The antenna is an extendable helical coil (209) having a shortened axial length when the shroud is moved to the first position and a lengthened axial length when the shroud is moved to the second position. The extendable helical coil (209) exerts biasing forces on the shroud (207) when the shroud is moved to the second position to urge the shroud (207) towards the first position. The releasable latch means, including a platform (205) having a flexible end portion (231) adapted for cooperative engagement with the shroud (207), latches the shroud (207) at the second position when the shroud (207) is moved to the second position and releases the shroud (207) from the second position, responsive to flexing the flexible end portion (231), permitting the biasing forces to return the shroud (207 ) to the first position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.