Direct linear electromagnetic conversion replaces crankshaft linkages to simplify power generation while improving thermal management and vibration control.
Direct LEM-piston conversion removes crankshaft linkages, improving power generation efficiency while controlling vibration and thermal expansion.
An incompressible fluid replaces connecting rods to transfer piston motion, cutting friction and wear while extending oscillator stroke and power output.
A structural frame, flexures, and low-friction bearing system keep free-piston translators aligned while reducing linkage complexity.
Stroke-limited piston motion enables 4-cycle linear power generation with lower vibration, better fuel use, and adaptive DC output.
Recirculated exhaust cools and mixes incoming air in a dual-chamber fastener driver, cutting soot and fumes while removing the fan motor.
A hydraulic unit links opposing drive pistons to tangential shaft rotation, improving torque transmission and fuel efficiency.
A hermetically sealed linear generator converts pressurized gas energy into electrical power using a single winding and external permanent magnets.
Dynamic vent regions and non-ferrous isolators prevent magnet fouling and environmental contamination in harsh hopping robot environments.
A hydraulic free-piston engine controller determines piston trajectories and servo valve actuation parameters for precise fluid flow delivery.
A magnet-piston moves inside a non-conducting cylinder wrapped with induction coils to generate electric current directly from reciprocating motion.
Opposed free pistons balance forces through equal and opposite motions, reducing vibration while enhancing chemical to hydraulic energy conversion efficiency.
A linear fluid engine uses hydraulic pressure to transfer power from a combustion piston, enabling variable stroke length and speed without mechanical linkages.
Hydraulic impellers convert opposing piston strokes into continuous shaft rotation for consistent torque output.
Lever mechanisms connect opposed pistons to convert combustion energy into pressurized hydraulic fluid, eliminating crankshaft-induced piston slap.
Pre-compressing the gas mixture raises peak pressure, resolving low thermal efficiency and enabling faster driving of longer fastening elements.
Inverting exhaust ports above the combustion chamber allows hot gases to escape before piston return, eliminating bounce caused by trapped gas compression.
Gas linkages transfer force between free and extractor pistons, enabling high compression ratios while minimizing mechanical stress and heat transfer losses.
Cup piston seals combustion chamber and injects fuel via piston rod bores, preventing gas mixing.
A hydraulic free piston engine uses electronically controlled valves to manage combustion piston position and velocity for precise energy conversion.