Battery powered passive keyless entry system for premise entry
US8965287B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Apr 2, 2012 |
| Grant date | Feb 24, 2015 |
| Priority date | — |
| Expiry date | Feb 6, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C2009/00587
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A passive keyless entry (PKE) system, comprising a DC power source and a base station with a housing that includes a first portion being made of a first material that shields radio frequency (RF) signaling and a second portion being made of a second material that permits RF signaling, is particularly adapted for premise entry and is designed to be powered by common household batteries to unlock a premise door as a user approaches within a prescribed arms-length distance from the premise door. The PKE system further comprises a printed circuit board and a low frequency (LF) emitting antenna coil positioned both perpendicular to the printed circuit board and behind the second material of the housing while having a center axis oriented in a horizontal orientation. The LF emitting antenna coil transmits a LF interrogating signal upon detecting a user within the prescribed arms-length distance from the base station.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.