Oscillating Piston Engines TRIZ Cases

See how concentric circumferential walls redirect gas flow multiple times to improve oil separa

See how a fixed eccentric distance between shaft and cylinder enables continuous piston rotatio

See how controlled gap dimensions between the Oldham ring and orbiting scroll prevent excessive

A movable discharge-port member opens or blocks housing apertures to match screw compressor volume ratio to operating conditions and cut undercompression.

A single pair of interleaved scroll plates handles both compression and expansion, cutting complexity and cost in waste-heat recovery.

A movable discharge-port plug lets screw compressors adjust Vi to match seasonal conditions, cutting undercompression, energy loss, and noise.

Pressure equalization through a communicating pipe fixes the scroll or piston stop position, preventing expander restart failure in refrigeration cycles.

A split oil separator chamber vents trapped gas through an inter-member passageway, preserving oil storage and simplifying compressor production.

A four-layer chromium and amorphous-carbon vane coating improves adhesion and cuts wear at the vane-roller sliding interface.

An imide-based refrigerator oil keeps sludge dispersed while protecting aluminum and iron compressor sliding parts from wear and seizure.

Pulse-width-modulated unloading valves vary compressor capacity to improve frozen-range temperature control while avoiding damaging high pressure ratios.

A single gear assembly transmits torque and pumps fluid, cutting separate components and leakage points in drivetrain systems.

Annular friction plates and hydraulic brake release lock an oscillatory rotating body smoothly while reducing size and lock pin load.

A moving seal carrier absorbs radial distortion to limit friction and leakage, helping a rotary actuator deliver constant torque across stroke.

A grooved tooth cutting edge removes pump-body chips during running-in, limiting plastic deformation while preserving quiet, efficient operation.

Friction plates around the rotation restricting shaft deliver compact, automatic oscillation locking with reliable braking torque.

An internal cavity and fluid passage in the slide valve absorb suction-side pulsations, cutting compressor vibration and noise.

Pressure relief valves stop bearing lubrication at low pump pressure, cutting parasitic loss while preserving high-load flow and pump life.

An arcuate piston and moving seal carrier maintain constant torque, reduce friction, and improve fluid power use across wide rotary motion.

Opposed spiral oil grooves and a screw oil pump maintain lubrication in forward and reverse compressor rotation, reducing wear and energy loss.

Axial flow pathways and annular sealing rings create isolated pressure zones in a hydraulic motor disc valve, cutting machining complexity and flow loss.

Arcuate pistons and a moving seal carrier keep rotary actuator torque more uniform while limiting radial deformation, friction, and fluid loss.