Fluid-Pressure Actuator Safety TRIZ Cases

Two pilot-operated pneumatic valves interlock through an air spring to block unintended switching and enable purely pneumatic fault detection.

A piston-linked check valve lets a drooped spoiler return toward neutral during failures, preventing wing flap interference and excess drag.

Variable pneumatic grip pressure enables slow closure, automatic ramp-up, and test start only after target pressure is reached.

LED diagnostics, sensor feedback, and fan cooling help hydraulic power units detect faults, manage temperature and pressure, and avoid damage.

Deviation frequency analysis detects hydraulic output abnormalities and estimates leakage or friction factors with fewer sensors.

Automatic boost timing switches between high and normal relief pressure to handle heavy loads without overexposing components to damaging pressure.

Continuous inlet and return flow comparison detects underwater hydraulic leaks early, then warns operators and shuts down the pump to limit fluid loss.

Magnetic field and vibration sensing wake only on solenoid switching, enabling low-energy monitoring of pneumatic on-off valve movement and aging signs.

A spool-and-sliding-shoe isolation valve quickly exhausts railcar pneumatic energy and locks in the exhaust position during maintenance.

Automatic 3/2 valve venting lets double-acting door cylinders move manually without resistance when compressed air or power is lost.

Pump pressure is matched to actuator holding pressure through unload valve control, reducing surge pressure and improving startup response.

A stress relaxing member constrains diaphragm deformation during pressure fluctuations, reducing internal stress and breakage at high compression ratios.

Mechanically actuated pressure reduction keeps a hydraulic variable-pitch propeller out of reverse thrust if the servo valve fails in flight.

Electrically actuated proportional valves mounted at each boom drive cut hydraulic line delay and improve low-speed accuracy and damping.

A dual-position locking lever prevents accidental gas release while enabling controlled partial and full opening of a pressurized fluid valve.

Parallel trip paths and isolation valves let steam turbines test trip throttle valves online while preserving emergency shutdown protection.

Automatic drain paths and parallel pilot valves keep electro-hydraulic steering actuators controllable when a spool sticks open.

A rotatable rotor replaces a linear plunger valve to cut pump size, reduce seal wear and leakage, and simplify hydraulic override assembly.

Angle-based control regulates hydraulic regeneration flow when pressure sensors fail, preserving energy savings in boom and arm actuation.

A diverter shunts supply fluid back to return flow, blocking tool-head actuation and reducing hand-trapping risk during handling.

A controllable valve isolates the gas safety valve from the pressure accumulator, enabling maintenance without full depressurization or gas loss.

A tube, flange, and draining cap apertures admit water only on full immersion, preventing rain or splash activation in sealed triggers.

Electrically actuated proportional valves mounted near each drive assembly reduce delay and improve low-speed boom precision with load holding.

Simultaneous pressurization of both control chambers lets a slide valve switch progressively, reducing pressure peaks and actuator oscillations.

Electrically actuated valves, vents, and redundant sensors let BOP hydraulics be tested without full actuation, improving fault tolerance and cutting maintenance time.

A piston position sensor and closed valve reveal internal hydraulic cylinder oil leaks early, enabling remote diagnostics and planned wind turbine maintenance.

Position-based speed limiting lets an articulated mast fold and unfold faster while keeping manual emergency operation within legal speed limits.

A bypass line between actuator pressure chambers cuts throttling losses, improves cooling, and maintains precise steam valve positioning.

A local power unit supplies backup hydraulic pressure at each actuator so trailing edge flaps can hold commanded positions after hydraulic failure.

A variable bypass opening lets one hydraulic valve handle fail-safe actuator flow and unloading control while cutting valve count and tank loss.

A shiftable fluid coupling lets a crusher start gently, absorb load peaks, and protect the drive with fewer components.

A pressure-triggered bypass and lock switching valve prevent unintended actuator motion while avoiding costly electric unlock components.

A dual fluid-switch layout uses tilt and inertia sensing to stop hydraulic flow quickly when cranes or forklifts become unstable.

Fluid flow and pressure sensing detect seal wear, leakage, and friction in actuated valves early, reducing downtime and extending cycle life.

Mechanical pressure reduction, centrifugal weights, and return springs keep controllable-pitch propeller blades out of reverse thrust if the servo valve fails.

A return-line bypass feeds fluid to a boost pump and accumulator, cutting pressure-drop losses while supporting high-load flight control actuation.

A pressure-triggered valve routes leakage fluid into the low-pressure chamber to stabilize inlet pressure and reduce cavitation in hydraulic machines.

A shaft-coupled hydraulic and electric flap actuator keeps trailing edge flap control available during partial hydraulic or electrical failure.

Valve travel rate and output pressure are used to pinpoint pneumatic accessory activation and deactivation under supply loss tests.

An adjustable insert with replaceable quick coupler seals cuts tractor hydraulic oil leakage, reducing soil contamination and service time.

Pressure changes in two cylinder chambers reveal piston end position without nearby sensors, avoiding corrosion and contact wear in washdown equipment.

A check valve and bypass path let two hydraulic valve manifolds handle shutdown, overspeed control, and redundant shutdown with less space and cost.

Mirror-inverted check valves enable one-way chamber flow, returning a hydrostatic steering actuator to center without power after a fault.

A flexible wall accumulator and piston store in series maintain underwater hydraulic pressure while adding a second barrier against seawater ingress.

A hinged holding assembly keeps an aircraft actuator within its working position after connection body failure, limiting structural damage.

Return fluid is rerouted to a boost pump so aircraft actuators get higher pressure on demand with less pressure-drop energy loss.

A spring-biased depressurization valve enables automatic landing gear extension after hydraulic pressure loss, reducing emergency control complexity and maintenance.