Piston Rings TRIZ Cases

See how a metal upper cap with precision-machined grooves prevents dimensional drift and abrasi

An upward-then-downward passageway in a foam dispenser pump blocks gravity-driven leakage and reduces dripping between uses.

An asymmetric piston groove lets the ring shift during retreat, enlarging the wall gap to improve air intake and pressure discharge.

An angled master cylinder and high-pivot lever improve primary seal positioning, braking ergonomics, and hydraulic response with fewer parts.

A nested dual-core brake pump splits seals and spring functions to cut friction, wear, and oil leakage while improving braking feel.

An angled master cylinder and adjustable cam position the piston seal precisely, improving hydraulic response and brake lever ergonomics.

Selective polishing on piston sealing surfaces and an assembly-type piston unit cut brake pump defects, cost, and unnecessary processing.

Inclined seal groove surfaces help the piston roll back smoothly under high-pressure braking, reducing drag, fluid demand, and pedal feel loss.

A protruded seal groove reshapes seal deformation to restore piston rollback, reduce brake drag, and limit extra fluid demand.

An eccentric piston drive converts motor rotation into stable brake pressure while preventing piston rotation, cutting parts, weight, and package size.

A mechanically preloaded insert seal keeps the brake unit shaft bore sealed despite thermal expansion, tolerances, and assembly misalignment.

Multi-component injection molding integrates the seal and deformable guide to cut leakage risk, friction, and brake piston manufacturing cost.

An angled master cylinder and adjustable piston seal cut dead lever travel, improve braking feel, and simplify bicycle brake integration.

A lubricant-retaining valve structure keeps brake seals from drying and wearing under dry high-pressure air, improving service life.

A contact detector and compression ratio controller shift piston TDC to avoid cylinder liner steps, reducing ring impact and wear.

Controlled DLC sp2 ratio, hardness, and modulus help piston rings resist abrasive oil-deposit wear while limiting cylinder bore attack.

Alternating DLC and metal-doped DLC layers cut residual stress in piston ring coatings, preventing peeling while improving wear and friction.

A trapezoidal boss-and-groove opening creates single-side sealing in piston rings, cutting blowby, oil consumption, and friction mismatch.

Recesses in the coke scraping ring widen the fluid path to reduce dead space, equalize pressure, and prevent piston deformation in gas engines.

Silicon nitride piston rings cut pump weight and friction while protecting tool steel bores from wear and preserving bore diameter.

A curved concave undercut on the piston ring redirects scraped oil to the crankcase, cutting combustion-chamber leakage and oil consumption.

Embedded flexures keep segmented sealing rings seated against cylinder bores under pressure reversal, reducing wear, fracture risk, and downtime.

A dual-layer chromium nitride and chromium coating cuts piston ring friction and wear while keeping deposition practical and cost-conscious.

A symmetric arcuate rail profile with tight curvature improves oil scraping, lowers oil consumption, and simplifies ring manufacturing.

Metal particles with resin-affinity surface layers stay embedded in compressor rings, reducing abrasive wear and extending service life.

Openings and recesses around the pin bore cut steel piston mass while preserving strength, helping reduce fuel use, emissions, and noise.

Controlled honing roughness and cross-hatch valleys retain oil in cast iron cylinder liners, cutting friction without sacrificing seizing resistance.

A nitride protective layer shields the DLC-coated piston ring from thermal ablation while preserving low friction and wear resistance.

Grit blasting, PVD coating, and lapping create a porous unchamfered piston ring surface that resists chipping, improves lubrication, and cuts blow-by.

Laser glazing or flame-induced oxidation forms an oxide glaze on mid-turbine frame piston seal rings to cut friction and resist high-temperature wear.

Metal particles with resin-affinitive surface layers stay embedded in compressor sliding rings, reducing abrasive wear and extending service life.

Annular groove passages reroute blow-by gas past piston rings to prevent pressure buildup, radial collapse, and excess oil consumption.

Wedge backup rings and a metal face seal maintain fuel sealing in an axially expanding volume when piston seals soften at high temperature.

A cambered piston ring profile aligns the parting and pivot lines to limit lock-end opening, improve sealing, and reduce liner wear.

Positioning the parting line near the pivot line keeps piston ring lock ends closed under pressure, reducing leakage and wear.

Alternating CrAlN and Cr(Al)N layers improve sliding-surface wear, spalling, and scuffing resistance while reducing stress gradients.

A stepped piston ring joint and rotation stopper keep the gap on the load side, reducing blow-by leakage and improving compressor sealing.

Alternating hard carbon layers and a softer surface layer balance wear resistance, chipping resistance, peeling resistance, and low friction.

Pre-stressing a metallic surface in tension during laser treatment leaves residual compressive stress that improves wear, fatigue, and corrosion resistance.

Surface-treated piston rings maintain rupture strength after nitric-acid corrosion, helping hydrogen engines resist corrosive wear and breakage.

Chamfered ring edges, obtuse flank geometry, and DLC or ceramic coatings cut piston groove wear without costly laser hardening.

A lightweight titanium-core, nickel- or cobalt-shell seal ring cuts rotor borefoot contact stress and wear while maintaining a static seal.

A non-uniform oil scraper ring gap guides blow-by gas to cut oil entry and stabilize the second piston ring during overrun.

A polyimide piston ring with carbon fiber or graphite improves wear and heat resistance for oil-free hydrogen compressors.

A softer inner ring and harder outer ring help liquid hydrogen pumps maintain sealing, low friction, and strength at ultra-high pressure.

Rotation restriction on both piston rings keeps clearance stable, reducing stress concentration, fatigue failure, and sealing loss.

A convex ring partition profile improves sealing in the piston ring gap area, reducing blow-by, overheating, and coating damage.

Controlled steel alloy composition balances thermal conductivity and heat fatigue resistance in piston rings for hotter engines and better fuel economy.

Radial oil passages and lower-flank grooves let piston oil scraper rings drain and redistribute oil without piston drain bores.

Laser glazing or flame-induced oxidation forms an oxide layer on MTF piston seal rings to cut friction and resist high-temperature wear.

Surface nitriding or multilayer MoN/CrN coatings prevent ring-shaped fractures on softer substrates while preserving wear resistance.

A removable collar and scraper ring block debris from entering work-machine hydraulic cylinders, cutting maintenance and downtime.

Offset annular piston rings with misaligned gaps cut blow-by and oil carryover, helping hydrogen engines seal safely and run efficiently.

Three compression rings with tuned axial widths and tension cut blow-by gas while limiting piston weight and friction in diesel engines.

Selective chromium, DLC, and phosphate layers improve piston ring wear resistance while avoiding overheating and chipping during run-in.

Wedge-guided gap cover elements move outward as the piston ring wears, blocking leakage paths and extending seal life.

Pre-shaped groove undulations offset piston thermal distortion, keeping ring support flatter to reduce blowby, oil consumption, and emissions.

A curved concave undercut guides scraped oil toward the crankcase side, reducing ring-groove leakage and oil consumption.

An HNBR and carbon black sealing ring lets a micropump tolerate looser groove tolerances while reducing wear, extrusion, and debris.

Recesses in the lower ring groove flank enable pressure compensation, easing compression ring lift-off while improving sealing and oil flushing.

Nanoindentation-tuned plastic and elastic deformation in a DLC sliding surface helps resist carbon-sludge microfractures and abrasive wear.

Asymmetric U-cup piston ring surfaces use cylinder pressure to maintain wall sealing, cut top-land crevice volume, and reduce emissions.

Angled conical recess surfaces and a groove-bottom projection limit oil carbon buildup while keeping piston ring contact well defined.

Piston rod passages replace valve systems to manage gas exchange, simplify the engine structure, and support scavenging and energy conversion.

A mixed sp2/sp3 carbon transfer layer improves tribofilm adhesion at edges, cutting friction and wear under boundary lubrication.

Hard-coated metallic seal rings limit fluid velocity and resist abrasive drilling mud to keep downhole rotary steering pistons sealed.

Selective chromium retention keeps piston ring transition regions nitride-free, reducing edge chipping and cracks while preserving wear resistance.

Aluminum chromium oxide coatings on piston rings and cylinders cut friction and wear while staying stable across engine temperatures.

Varying internal groove depth lets a one-piece oil control ring maintain uniform wall pressure, simplify installation, and reduce wear.

A cyclically doped AM DLC layer cuts internal stress in piston ring coatings, enabling thicker low-friction films with better wear durability.

Circumferentially extending channels in the bracket member distribute sealing oil to accommodate varying power plant piping positions without ad hoc machining.

A hydraulic braking device partitions a fluid chamber with an elastic seal to delay deformation, reducing oil impact and vibration during piston startup.