Abstract: A firearm maintenance system may be utilized to clean, lubricate and protect a firearm. Embodiments of the invention provide for creating a sealed environment between the breech end and muzzle end of the barrel of the firearm and introducing a maintenance fluid into the sealed environment. The maintenance fluid may be circulated within the barrel in a closed circulation configuration by a pump. The maintenance fluid may be heated. An ultrasonic generator may be utilized to induce cavitation in the maintenance fluid to improve cleaning efficiency. Fluid flow sighting devices may be utilized to visibly monitor operation. Electronic means to monitor and safeguard the firearm maintenance system may also be employed.

Abstract: A power system has an energy conversion device and a volume expansion engine. The energy conversion device is configured to receive fuel, implement an electro-chemical process to generate an electrical output, and produce a first exhaust flow. The volume expansion engine is configured to receive the first exhaust flow, combust the first exhaust flow to generate a power output, and produce a second exhaust flow directed into the energy conversion device.