Engine Seals TRIZ Cases

See how a cutting ring positioned in a sealing ring annular slot creates a labyrinth seal that

See how a flexible seal between nested containers defines the frothing channel, enabling easy d

See how a multi-directional seal with vertical and horizontal sections maintains airtight closu

See how a multi-part sealer with annular gasket support prevents water and foreign substances f

See how an intermediary bearing between lip seal and knife shaft reduces seal wear, enables sel

See how a thermally driven actuator with integrated elastic return eliminates separate springs

See how a single-vane module with integrated gasket replaces multi-vane dampers to improve airt

See how a wrinkle-portion seal with elastic bent walls maintains contact during drive shaft ecc

See how merging the bearing base with the partition plate eliminates gaskets, reduces noise fro

See how an annular protrusion and recess design prevents sealing gap opening in centrifugal pum

See how a rotating mullion bar with vertical movement and heating prevents incomplete door clos

See how a composite encapsulation system combines elastic adhesive with barrier coating to redu

See how a separate seal carrier with integrated retention contours enables tool-free seal repla

See how inorganic particle coatings with intumescent substances enable dryer seals to withstand

See how a resilient U-shaped wall jamb uses pressure-sensitive adhesive to eliminate mechanical

See how a composite metal-plastic sealing seat with elastic ring collar maintains coaxial align

See how a collapsible bulb seal with apertures captures and vents CO₂ sublimation during door c

See how a layered non-metallic seal with elastic and heat-resistant materials uses bended accor

Split refrigeration prioritizes barrel freezing over hopper cooling to improve frozen beverage quality and simplify dispenser maintenance.

A heat-activated dryer seal uses meltable fibers and an expanding coating to vent smoke while restricting airflow that can fuel fire.

Gas-assisted molding forms a hollow washing machine lid frame that supports a transparent panel while reducing creep, fracture, and material use.

Uniform binder-coated inorganic fibers with dispersed inorganic particles suppress scattering and preserve sealing pressure after exhaust heat.

A biased movable seal opens during door motion and closes against the frame to cut galley air leakage, wear, and cooling loss.

Barrier and evacuation elements keep splashed fluid away from motor bearings by creating a pressure differential in tight cooling assemblies.

Ribs moved from the blender jar to a removable sealing gasket preserve mixing turbulence while simplifying glass molding and cleaning.

A radially movable seal with an elastic member maintains shaft centering, absorbs impacts, and cuts gas leakage in turbo refrigerators.

Fresh lubricant and pressurized air cool gas turbine bearings, while venting prevents hot oil recirculation in supersonic operation.

A heat-migrated sealing composition on the capsule rim creates a water-tight seal, reducing device seal wear and stabilizing extraction pressure.

A rigid-elastic U-shaped casing seal prevents tilting during vacuum cleaner assembly while maintaining blower chamber sealing.

A rocking beam drive converts piston motion while limiting side loads and friction, helping Stirling machines run quieter and last longer.

A notched gasket lip opens a leakage orifice above a pressure threshold, avoiding sudden steam discharge and gasket damage.

Local thickened areas on a pressure-cooker seal self-center the lid and vessel, easing installation while maintaining leak-tight sealing.

A tacky textile finish improves tire layer adhesion and alignment during vulcanization, helping prevent delamination and layer shift.

A rigid bracket compresses a flexible corner seal to close gaps from uneven enclosure angles and block rain, dust, and debris.

A compressed blocking ring stops initial leakage, while a water-absorbing ring expands on contact to maintain sealing after repeated cover removal.

Dual projecting lips and an annular recess seal telescopic appliance tubes to stop air leakage, preserve suction, and avoid extra power use.

A lip moulding with foam tape and protected caulking keeps corner joints watertight under weight changes while reducing mold buildup.

Heating a liquid seal on the capsule rim lets it migrate to the side wall, creating a tight seal that prevents leaks and preserves extraction pressure.

Built-in heaters and a warm dry purge keep cryogenic pump packing seals warm, limiting deformation, leakage, and ice buildup at low speeds.

A reinforced plastic guide rail for movable vehicle roofs cuts metal fasteners, lowering weight, noise, assembly effort, and cost.

A pressure-activated valve relieves trapped air in a sealed front trunk, easing closure while reducing actuator weight and packaging space.

A segmented battery tab seal uses stronger and weaker portions to resist drop damage while venting gas during over-pressurization.

An inclined partition lower rear member redirects water from the vehicle midgate to the floor panel, blocking cabin intrusion.

Segmented central-lip protuberances and discharges keep cylinder fluid passage open while limiting gasket bending and rotation.

Controlled 10-30 µm pores in a porous silicone gasket maintain 300°C gas sealing while lowering reaction force and limiting gas path damage.

Gripping devices in the sealing seat spread foamed sealant evenly around the cable, preventing gravity-driven gaps and simplifying assembly.

An adhesive stack with a separating layer enables reliable flow cell fluidic coupling at lower sealing force, reducing warpage and alignment issues.

A protrusion and hardened seal-lip region limit deflection under pressure difference, reducing door frame suction and improving sound insulation.

Heat-activated adhesive in a flat cable seal maintains edge sealing pressure, protects against sharp edges, and improves insertion strength.

A split exhaust groove and hole vents cavity gas during molding, preventing gasket protrusions, demolding damage, and sealing defects.

Transverse cutouts and curved base slots let a prefabricated glazing seal fit rounded corners without rework, blistering, or high stress.

Using fluororubber and EPDM O-rings in series, this flange seal limits oxygen-rich gas permeation and preserves low-temperature sealing.

A variable-recess blow mold thickens the suspension dust cover flange, improving attachment strength without limiting bellows movement.

Multiple seal lips and a steel slinger block moisture and debris in in-wheel motors while limiting friction, heat, and vibration damage.

Asymmetric screw placement and movable seal members prevent 180-degree misalignment and simplify shield cover attachment.

A hard-soft valve seal uses covered form-fit joints and shielding elements to resist IPX9K water jets without sealing damage.

A hingeable seal leg lets one side attach first, then rotate into place to secure the enclosure with less labor and time.

Localized low-friction, hardness-tuned coatings help a glass run channel improve window sliding without raising lip bending reaction force.

Multiple sealing lips with different diameters keep cable sheath material inside the seal and preserve sealing pressure over time.

A partially vulcanized rubber clamping section enables co-extruded door seals that avoid metal-edge corrosion and simplify recycling.

Multiple sealing lips with different inner diameters keep cable sheath material inside the seal, preserving sealing pressure over time.

A coextruded resin trim strip replaces metal in automotive door glass runs to cut weight, lower cost, and simplify decorative tape changes.

A retractable stopper blocks door closure when slight glass lowering fails, preventing sashless vehicle door glass from hitting the weather strip.

Multiple rotating and fixing seal spaces redirect moisture and scatter contaminants to improve wheel bearing sealing while lowering drag torque.

Detachable side seals open mounting space at the top frame, letting a luggage carrier attach without cutting panoramic sunroof glass.

Molded foam inserts with ribs or slits improve smoke, sound, and fire sealing around pipes and cables while simplifying retrofit installation.

Expandable anchor arms nest in seal cavities to replace heavy retainers, keeping seals secure while reducing weight and installation complexity.

A stud-retainer joint with adhesive absorbs assembly tolerances in sealed display housings, limiting squeeze-out, distortion, and weak bonding.

Threshold-controlled fluid connection balances dual brake pressures for uniform wear while isolating leaks to preserve braking safety.

Magnetic attraction plus mechanical locking keeps autonomous mobile docking stable, prevents looseness, and seals contact gaps.

A donor-acceptor rubber composition dissipates charge in plasma-exposed semiconductor seals, reducing dust attraction and particle generation.

A flexible gasket with elastic beads and guiders conforms to stepped battery pack case joints to block moisture and dust ingress.

A thermoplastic sandwich roof shell with foam core cuts RV roof weight while preserving strength, insulation, recyclability, and rework.

An integrated coupling element shapes and seals a removable fabric vehicle top, avoiding extra peripheral frames and rigid backrest geometry.

A silicone antifoaming curable resin enables bubble-free screen printing for fuel cell sealing while retaining high strength and elongation.

Controlled fluoro(alkyl vinyl ether) content and melt flow balance injection moldability with ozone resistance while reducing surface defects.

Compatible thermoplastic resins let a fuel cell gasket bond directly to the separator, reducing peeling, adhesive steps, and thermal mismatch.

A spacer shields exposed door seal surfaces from shoe-sole friction, extending seal life while preserving reliable door sealing.

A rotating support arm shifts the truck bed cover sideways instead of upward, freeing overhead cargo space and reducing bumping during loading.

A compressible seal fills the gap between the glass run and door inner trim panel to reduce wind noise leakage into the cabin.

Mechanically formed recesses create soft sealing zones in a single-material door profile while preserving outer contour accuracy and simpler extrusion.

Hard rubber embedded in the seal base and connection suppresses molding deformation, preserving contact force and door sealing.

Radial openings in the primary gasket central lip maintain fluid passage and prevent bending or rotation in cylinder assemblies.

A hard coating and shaped hollow seal help thermoplastic opening trim weather strips resist wear while preserving sealing and NV performance.

Three staggered seals close the gap between pillarless front and rear doors to block road noise and moisture without adding a center pillar.

An inner-face seal in a recessed housing opening stays protected during hydraulic device removal, avoiding seal replacement and preserving leak-tightness.

Discrete central lip protuberances keep a cylinder primary gasket from bending or rotating while preserving low-resistance fluid discharge paths.

A slotted weatherstrip joint corner inserts into a door-mounted bracket to stop debonding, close gaps, and block moisture and dust.

Half-lap slat joints and end-cap-fixed joiners shield cut-prone seams and resist shrinkage in retractable truck bed covers.

A conductive lip and metal ring ground the rotating shaft through the housing, cutting EMI noise and electrolytic corrosion without a separate brush.

An action member supports the seal ring against thermal contraction, maintaining fluid sealing in annular gaps at low temperature.

A U-shaped sealing profile replaces joint compounds in double-layer drywall, speeding installation while improving moisture and fire sealing.

Ambient pressure flexes a two-part sealing element to press against larger gaps, preventing leakage in high-pressure connections.

A footed biasing member supports a flap seal on existing protrusions, preserving sealing performance while cutting support space and wear.

A dual-lip wiper seal with a 360-degree ice scraper keeps grease in, blocks debris and ice, and lowers ball screw actuator drag.

An insulating layer between split gasket core parts cuts electrical conduction while preserving high-temperature sealing and fire safety.

Layer-by-layer curing forms chemically resistant seals with strong interlayer bonding for complex non-planar surfaces and shifting interfaces.

Embedded particulate resin gives fluororubber seals durable low-friction sliding without losing sealing force, even as the surface wears.

An asymmetric surface and flexible seal block particles from entering moving-part gaps while sweeping debris out during normal motion.

A dual-porosity abradable seal uses a dense contact layer over a porous base to limit erosion while preserving free-cutting and sealing.

An integrated holding device locks the combustion seal to the heat shield, preventing gas leakage while conducting heat away from the fuel injector.

Exterior sealing lips use centrifugal force to eject dust past the seal while protecting the oil seal in harsh shaft-housing environments.

Pressure-driven pig trains carry curing sealant into lateral pipe leaks, sealing defects quickly without excavation and cutting water loss.

Porous end members absorb graphite abrasion powder and retain lubricant, helping gland packing maintain airtight shaft sealing and reduce leakage.

Injection-molded plastic sealing rings bonded to a sheet metal base prevent shift under torque and simplify automated bolt assembly.

A winged ring seal uses progressive axial and radial compression to improve leak resistance, cut material use, and protect sealing edges.

Micro-depressions on centrifugal separator sealing surfaces cut friction and wear, helping maintain seal integrity with lower energy use.

Circumferential seal lip protrusions support and restrain the garter spring to prevent groove disengagement while easing mold release.

Annular recessed sealing surfaces improve pressure distribution to suppress bidirectional shaft leakage while lowering rotational resistance.

A shallow groove, deep groove, and communication groove work together to maintain negative pressure and suppress sealed fluid leakage.

Variable groove depths adjust seal height around non-circular chamber doors to offset deflection and maintain a hermetic seal.

Varying bristle lengths and backing-plate grooves cut brush seal wear and frictional heating while maintaining sealing under pressure.

A stabilizing surface and projecting securing elements keep the seal oriented in a groove and resist sliding out during mounting and use.

A dual-layer black oxide or phosphate and amine-silane coating improves wear, friction, and corrosion resistance under contaminated lubrication.

Multiple bite rings, expansion grooves, and vent passages manage combustion gas leakage at the head joint while protecting nearby engine components.

Ion-exchanged layered clay minerals replace oxidation-prone fillers to keep sealing materials water-resistant and stable under heat and pressure.

A one-piece inner seal with dual lips and spring-loaded contact replaces complex mechanical seals to limit leakage of low-viscosity media.

A variable-welting sealing strip improves neutral fiber alignment on curved wing gaps, reducing bending distortion and parasitic drag.

A rigid sleeve constrains a graphite-polyimide ferrule to maintain a gas-tight seal under thermal cycling while blocking oxygen diffusion.

Modular spacer, cover, and radial shaft seals curb oil leakage in pillow blocks while cutting seal replacement time and downtime.

A pressure-shifting seal helps gearbox rotary unions stop leakage while keeping hydraulic fluid and lubricant paths isolated.

Grouped spiral dynamic-pressure grooves create larger land sections that stabilize fluid film thickness, improve lubrication, and limit leakage.

Spring carriers and coil springs keep a carbon seal face loaded against the seal land, limiting bearing-compartment leakage and heat in compact engines.

Direct torque sensing on the stationary slide ring detects sealing-surface wear during startup and pressure surges, enabling timely replacement.

Supplemental airflow with controlled temperature and swirl shifts rotor cavity acoustics to reduce seal tooth oscillation and wear.

Multiple sealing layers, an inflatable barrier, and drainage help retractable thruster stem tubes block seawater ingress while allowing shaft movement.

Multiple sealing layers, an inflatable barrier, and drainage help retractable thrusters block seawater ingress while accommodating shaft movement.

Segmented seal elements accommodate axial thermal expansion between static turbomachine parts while simplifying assembly and maintaining sealing force.

Triiron tetraoxide lets fluororubber fragments as small as 1 mm be metal-detected while keeping compression set at 21% or less.

Using process gas as the barrier medium, this dual mechanical seal returns leakage from an intermediate chamber without a separate barrier gas unit.

Air injection expands and contracts the boot seal for easier groove fitting without grease, improving mounting reliability in tight spaces.

Tellurium- and vanadium-oxide seal layers with laser heating preserve glass temper while maintaining hermetic vacuum panel sealing.

A static seat seal plus a dynamic plug seal enables pressure-balanced valves to reach Class V shutoff above 500°F without pilot plugs.

Elastic sealing rings maintain contact on a reciprocating pump rod as wear develops, cutting maintenance needs and reducing rod damage.

Hydrostatic and hydrodynamic force balancing helps a circumferential seal cut wear and heating while maintaining sealing at high pressure and speed.

Radial fluid recovery grooves overlapping a dynamic pressure groove recover sealed fluid, cut leakage, and stabilize lubrication.

An axially expanding diffuser surface manages pressure gradients in non-contact seals to cut seal flutter and fluid leakage.

A two-part dynamic seal with reinforcing lug and radial notches improves pressure sealing and damage resistance in offshore rotary joints.

Groove-based clamping gives bellows seals defined compression and a gap-free transition, preventing contamination and material damage.

A spring-loaded pin lock replaces screws in seal cartridge assembly, improving sealing alignment while simplifying disassembly.

A circulating e-liquid compartment and air guide member balance internal pressure to reduce leakage and keep atomizer suction stable.

Redirects reverse pressure loads through a non-sealing feature to protect unidirectional seals while maintaining pressure-energized sealing.

High-time-resolution temperature sensing estimates sliding-ring seal wear volume from short thermal events, improving failure prediction with less complex measurement.

A rigid-ring and semi-flexible seal structure blocks debris ingress while allowing lubricant expulsion to protect joint bearings.

A circulating e-liquid compartment and air guide member balance atomizer pressure to stabilize suction and reduce e-liquid leakage.

Segmented stuffing box members and a threaded stuffing nut compress seals around the plunger to reduce hydraulic pump leakage.

Integrated intumescent foam lets a joint sealing strip block drafts and rain, then expand under heat to resist flames and smoke.

A removable O-ring retainer preserves groove compression for better vacuum sealing while enabling tool-free removal without scratching.

Local thinning of the outer layer makes annular seal parting lines easier to see, supporting accurate attachment without sacrificing hermetic closure.

Graded seal layers with matched thermal expansion reduce edge stress in vacuum insulated panels while improving hermiticity, adhesion, and moisture resistance.

A mold-held extended plastic liner prevents elastomer migration during rotary seal molding, then is trimmed for accurate high-pressure sealing.

An eccentric, asymmetrical sealing lip layout improves lubrication, lowers heat and wear, and extends axial sealing ring life.

A dual-lip sealing ring uses elastic lip deformation to keep shaft contact, deflect contaminants, and reduce wear without springs.

Fluid jets from inner and outer seals form sealing layers that follow belt movement, suppress leakage, and keep the press compact.

Localized hydrophobic sealing surfaces and groove geometry block water intrusion around aluminum members, reducing corrosion while maintaining seal stability.

A radial wear indicator on segmented packing rings enables condition-based replacement, reducing compressor downtime and leakage risk.

A paired shaft seal lets the bearing sit inside the evacuated flywheel housing, cutting friction, leakage risk, and seal wear.

A separate interlock and gasket seal cosmetic product containers tightly while enabling simple linear opening and closing without rotation.

A movable retainer biases the gasket against the fitting surface to maintain hole alignment, stabilize assembly, and prevent leaks.

Overlapping asymmetric plates with different materials cut exhaust gasket cost while maintaining sealing performance and durability.

A gasket and diaphragm spring seal the flare bowl interface, cutting gas leakage and flame impingement while extending flare tip life.

A housed flange and elastic ring create a smooth, corrosion-resistant robot joint seal that supports easy cleaning in food and drug settings.

A hard-soft dual sealing structure helps robot joints prevent reducer leakage, contamination, and rust in harsh environments.

An integrated sensor ring on the non-rotary seal carrier measures temperature, vibration, and pressure to detect wear and dry running.

A defined gap seal limits oil contamination while feeding slight lubrication to the grounding element, extending service life without harming conductivity.

A carbon face seal and lubricant passages close the annular shaft gap, cutting leaks, friction, and heat in turbine engines.

Cuts in an interference-fit annular seal reduce hoop stress and friction while maintaining sealing under thermal expansion and misalignment.

An asymmetric ring and seal layout cuts bearing width and weight while preserving load capacity, grease retention, and service life.

A narrower bearing layout uses a thicker inner ring, larger ball pitch diameter, and seal overlap to limit grease leakage while keeping load capacity.

Rounded lobes and a nonuniform seal profile maintain contact in thin, tolerance-sensitive grooves to prevent discrete fluid leaks.

A carbide base and DLC coating on the housing creates a carbon-on-carbon seal interface that cuts wear, friction, and sub-surface heating.

A C-channel ring seal with a C-shaped spring enables high-pressure wellhead sealing in standard grooves with far less torque and installation time.

A vertically movable top and bottom plate with elastomer lining makes wheel seals easier to install and less prone to leakage on uneven terrain.

Transverse ribs stiffen the plug’s inner wall to limit spreading during assembly, reducing hole-edge pressure while improving sealing and holding force.

A rolling resilient seal accommodates thermal expansion and pressure loads in gas turbines, reducing cracking while maintaining sealing contact.

A sealed intermediate chamber balances external pressure in a diaphragm wall cutter drive, blocking dirt and water without bulky gas systems.

Concave pockets and inclined grooves generate hydrodynamic separation and return sealing fluid to cut leakage and wear in both rotations.

Wireless sensing on rotating seal rings avoids cable damage in hot, aggressive media while improving seal condition monitoring and maintenance planning.

Internal pressurization and matched seal-ring diameters enable rotary bushing seals to be cleaned and sterilized without disassembly.

An end-fin removal face lets labyrinth seals be pulled in tight gas turbine spaces while reducing damage risk to adjacent components.

A hydraulic motor-generator and VFD recover pressure energy from seal oil flow, cutting heat loss and power use while maintaining stable pressure.

An annular support ring controls spring shrinkage at cryogenic temperatures, maintaining seal contact pressure to reduce leakage and wear.

Sensors opposite the seal track thickness along its length, revealing uneven wear and predicting replacement before leaks occur.

Columnar graphite in a silicon carbide seal improves lubricity without sacrificing hardness, wear resistance, or uniform mechanical properties.

A dual-contact lid seal uses angled shell interference and a gasket shelf to stop immediate leaks without zipper-level gripping force.

A laterally movable rod seal base and bushing keep oscillating piston rods aligned, reducing wear, friction, and oil or gas leakage.

A columnar radial seal grips the receiving tube without adhesive, cutting assembly steps while keeping the force sensor securely mounted.

An acute inner ramp wall stretches the O-ring to hold it in the annular groove, reducing pop-out, misalignment, and seal leaks.

Gas-pressurized seal chambers and pressure measurement cut seal wear in screw centrifuges and make bearing-protection maintenance predictable.

A floating labyrinth seal uses a spherical interface and pressurized fluid balancing to prevent leakage and contamination during shaft misalignment.

Directly coating glassy carbon on the base material improves heat conduction from the sliding surface, limiting friction heat, wear, and cracking.

A grooved annular sealing member cuts insertion and removal force while improving fluid sealing by flexing and filling panel gaps.

Randomly distributed dimples of different diameters help mechanical seal faces cut friction while maintaining sealing and lubricity across wide bearing conditions.

A leakage-side annular groove redirects sealed fluid into spiral pressure grooves, improving lubricity while raising fluid recovery in a mechanical seal.

A silicon-rich ceramic contact surface improves hydrophilicity and cleaning, reducing bubble adhesion for more accurate analyzer dispensing.

Phase-changing materials absorb heat and maintain seal pressure tightness, extending fire seal life in extreme temperatures and fluid exposure.

An offset recess and stepped groove lock the bellows ring on the guide bar, improving dust sealing and brake caliper guide assembly.

A flexible blade and elastomeric cords keep panel joints sealed while allowing panel replacement without re-sealing or screw seizing.

A dual-ring gasket pairs a soft sealing ring with a rigid outer ring to limit creep, distribute load, and prevent flange leakage over time.

Engineered metal seals with C-ring geometry and spring support cut pre-combustion chamber leaks under cyclic heat and pressure.

Blending high- and mid-fluorine crosslinkable fluoroelastomers improves mixing, sheeting, and 100% modulus while preserving plasma resistance.

Staged gas-pressure chambers contain lubricating oil after seal ring failure while blocking external fluid entry in rotating equipment.

Magnetic sensing tracks suction roll seal wear margin without visual contact, enabling accurate replacement timing and continuous machine data.

Comparing rack forces at two commanded rack positions helps detect steering boot damage early in Steer-By-Wire systems and preserve steering feel.

Beveled sealing legs and coplanar centering legs enable bidirectional sealing in one groove while limiting lateral movement and leakage.

Concurrent knitting of ceramic strands, alloy wires, and insulation forms lighter bulb seals that resist heat, deformation, and compression set.

Connected circumferential and axial grooves help retain grease at the side lip, limiting centrifugal loss, wear, and sliding resistance.

Inclined thread protrusions keep seal-lip contact with the shaft, enabling early screw pumping while suppressing leakage at high rotation.

A tapered expanding jig and elastic pushing jig let a metal retaining ring bypass the first groove and seat accurately in the second groove.

Separate combustion and fluid sealing sections use anti-fret and rubber coatings to resist heat, fretting, and fatigue cracking.

Magnetically circulated ferrofluid seals isolate the wellbore wall during drilling, enabling cleaner formation sampling and pressure testing.

A symmetrical polygonal sealing ring uses crest lines and restoring forces to stop inversion during pipe connection assembly and preserve sealing.

Dual radial and axial locking keeps the PTFE inner seal from collapsing into the bore during decompression, reducing leakage and maintaining isolation.

A catcher integrated with the seal runner spacer limits deflection from deflector weight, preserving bearing compartment sealing and oil pressure.

A round heater fixing surface and sealing member guide liquefied aerosol away from internal passages to prevent leakage and device malfunction.

Physical shields, labyrinth paths, impeller separation, and a brush seal keep debris off carbon face seals to extend shaft seal life.

Deformable inner layers compress into corroded flange crevices, sealing pipeline joints without re-machining or flange replacement.

A structural cover shields the hydrostatic seal’s secondary seal from pressure reversal damage, preventing bending and loss of sealing function.

Hydraulic rod sealing cuts actuator force and seat wear in decoking valves, extending repair intervals and preventing seal blowout.

A monolithic fluid cover improves sealing and alignment in reciprocating high-pressure pumps, resisting cyclic pressure damage and leakage.

Flexible seal arms and a mating plunger-closeout seal reduce core air leakage across moving exhaust nozzle flap-sidewall gaps.

A sealing member extending beyond the fastener head blocks environmental ingress at the welded joint interface to inhibit corrosion.

A tapered inner surface concentrates sealing force at the upstream face to peel off debris, prevent nibbling, and extend pump seal life.

Chamfered and stepped sleeve ends reduce contact with damaged surfaces, protecting shaft seals during assembly and disassembly.

Two seal rings split impurity blocking and lubricant retention in a track joint, improving sealing stability under varying conditions.

An axially movable spring holder keeps O-rings unloaded during assembly, then compresses them radially to prevent buckling, misalignment, and leakage.

Thermally activated shape memory actuators expand the seal only during operation, cutting fatigue, compression set, and installation sensitivity.

A fluid-pressurized annular seal expands at standstill and relaxes during rotation to preserve shaft clearance, cut friction, and prevent leakage.

Stepped deformations on an L-shaped dual face seal increase load-ring grip to resist spinning, retain lubrication, and block debris ingress.

A split barrier fluid chamber and flexible lip seal help marine shaft seals prevent oil leakage to seawater and block water ingress.

An elastic seal cuts inner-ring contact under compressed air, reducing friction for ultrahigh-speed dental turbines while preserving braking and lubricant retention.

Carbon fibers and nanotubes reinforce fluororubber seals to resist wear, hydraulic pressure, and protrusion in CVT pulleys.

A sliding backing plate keeps brush seal bristles supported during cavity movement, reducing leakage, deformation, and clashing.

A single air supply pressurizes both marine seals while separate drainage recovery isolates leaks and improves seal abnormality detection.

Rounded base corners and inward-offset anchoring feet reduce concrete tubbing seal spalling without weakening the embedded material.

A spring-and-band damper on the bellows exterior cuts vibration load at high driving frequencies, extending seal life under harsh loads.