Donaldson Comapny, Inc.

Thermo King Corporation

Matthew A Musich

Mark C Shepherd

John J Shaw

Ladd J Brabec

Jeremy R Reem

Phillip M Abbott

A filter cartridge includes a tubular core movably oriented within an inner liner and having a projection having a flow passageway. The core is free-floating and movable between a first position, in which the core can move along a longitudinal axis of the core, and a sealed position, in which the core is sealed to an inner liner of the cartridge. In the sealed position, the flow passage through the projection can provide an air flow passage of air within an inner cavity to outside of the filter cartridge. Other arrangements include a filter cartridge with a free-floating core, which forms a fuel bypass between the core and a standpipe.

Filter cartridge, filter assembly, and methods

Systems and methods of monitoring battery health in an HVAC system. The charge state of a rechargeable battery and the number of amp-hours provided to or from the rechargeable battery are monitored. The number of amp-hours provided is recorded and an end-of-life condition is detected based on the number of amp-hours provided during the charge or discharge cycle. In some constructions, the end-of-life condition is detected by comparing the number of amp-hours provided during the charge or discharge cycle to a threshold. In some constructions, the end-of-life condition is detected by calculating a rate of change of the number of amp-hours provided during a charge or discharge cycle and comparing the rate of change to a threshold.

Monitoring battery health in an HVAC system

Growing community of inventors

Minneapolis, MN, United States of America

Matthew A Musich