| Walter Kidde Portable Equipment Inc. Patent applications |
| Patent application number | Title | Published |
|---|
| 20100097211 | Life safety device with automatic battery discharge at the end of life - When a rechargeable battery of a life safety device reaches its end of life, the life safety device provides an audible signal indicating that replacement is required. When the device is disconnected from line power, the rechargeable battery still contains a significant amount of energy. The device automatically begins controlled discharge the battery until the stored energy has been reduced to a safe level for disposal of the life safety device and its battery. | 04-22-2010 |
| 20100097035 | Life safety device with extended shelf life - A life safety device includes a battery assembly with a rechargeable battery. Extended shelf life is achieved by annually initiating an over-discharge protection mode in which a battery protection circuit prevents current flow from the battery. The life safety device remains in the over-discharge protection mode until the device is connected to a charging power source at the time of installation. The battery assembly then exits the protection mode and enters its normal mode of operation. | 04-22-2010 |
| 20080316044 | Pivoting Battery Carrier and a Life Safety Device Incorporating the Same - An electronic device, for example a smoke alarm, that includes a battery carrier that includes a push to open and push to close apparatus for opening and closing the carrier. In one embodiment, the carrier is mounted so as to be pivotable between a closed position and an open position. Pivoting movement of the carrier is controlled by a double acting latch mechanism that includes at least one heart-shaped cam groove and at least one cam follower engaging with the cam groove. The carrier is a simple to access and operate to facilitate replacement of the battery. A lockout mechanism can also be provided to prevent closure of the carrier without a battery installed. In addition, a tamper resist mechanism can be provided to prevent the carrier from being opened when the carrier is at the closed position. | 12-25-2008 |
| 20080211678 | Alarm with CO and smoke sensors - A life safety device includes a smoke sensor and a carbon monoxide (CO) sensor. Smoke sensitivity of the device is adaptively adjusted based upon the smoke sensor signal and the CO sensor signal. | 09-04-2008 |
