Bolts TRIZ Cases

Quasi-cylindrical drive tool geometry generates a stick-fit effect through controlled friction for secure axial guidance.

A recessed head screw features a driving socket with a specific diameter ratio to ensure close-fitting engagement with the driving tool.

A conical press connection system with a tapered recess and sloping transition surface creates a stable stick fit between the tool engagement section and screw head.

A screw tightening structure uses a negative driving angle to transmit torque through tangential force application.

A combination driving bit accommodates both Phillips and Robertson head fasteners through a specialized working portion.

Direct fastener joins tower components via friction hold and bonding without through-going holes.

A bolt with a built-in IC tag employs a mechanical locking mechanism to prevent tag detachment while preserving structural integrity in harsh environments.

Side-mounted compartment with hinged lid and foam inserts enables riders to access stored items while seated without dismounting.

An adjustable leg mechanism replaces multiple specialized clamps, reducing inventory complexity and installation costs.

Laser hardening the pointed area of a one-piece screw anchor prevents hydrogen embrittlement in the soft shank while an anti-friction coating aids penetration.

An undercut profile in clamping nut recesses grips wrench projections to prevent lateral slippage and improve torque transmission.

Hollowed head and expandable sleeve align diaphragm segments without severe cooling, preventing misalignment during installation.

Segmented screw threads alternate direction to reduce torque resistance and prevent material mushrooming during installation.

A movable fixing bolt controls latching sections to enable tool-free installation, resolving assembly complexity and cost challenges in rail vehicle interiors.

A liquid filter module uses a sleeve or pin to secure the insertable part within the receiving channel.

An elastic self-locking mechanism automates LED panel mounting, reducing labor costs and assembly time compared to manual coordination.

Segmented screw head geometry with internal ribs increases frictional engagement to prevent accidental drop during robotic assembly.

Self-contained tool bolt features an expandable handle section that extends laterally from the head to provide increased leverage for tightening and loosening operations.

An elastically deformable alignment member with tabs facilitates precise component coupling through controlled shape change.

A tightening tool coupling part features a lateral opening to accommodate an internal line while engaging a screw element.

Elastomeric sealing element encases a setting bolt to isolate it from environmental moisture.

An undercut relief in a dowel element prevents fretting damage and extends component lifetime under cyclic loads.

Interlocking notches enable tool-free assembly of a modular CNC frame, resolving the trade-off between structural strength and ease of operation.

An asymmetric thread screw with a ballistic point penetrates wood fibers using distinct slide and grip flanks.

Cold-forming the unthreaded shank prevents breakage below the head when screwing into hard wood.

Martensitic high strength bolt resists delayed fracture by trapping hydrogen in carbides, maintaining 1400 MPa tensile strength.

Spherical silicide particles strengthen the alloy to over 750 MPa while maintaining machinability and corrosion resistance.

A clamping bolt nose engages a component groove to form a positive connection that secures the workpiece.

A recessed screw drive socket uses slanting walls and non-parallel side surfaces to engage driving tools firmly.

Heating thermoplastic resin-infused fiber flakes to melt them for injection molding into composite fasteners.

Convex screw heads with radial indentations prevent tampering by restricting access to conventional tools while maintaining easy alignment.

An asymmetric upper bracket hole constrains a columnar tow pin, eliminating chains that damage work vehicles.

A tapered bit with alternating lobes engages multiple fastener sizes while maintaining axial alignment.

A connecting pin features longitudinal ribs that compress upon insertion to provide immovable stability within pin holes.

A thread forming screw uses a constant radius flank to deform low ductility materials without cracking.

Segmented cam end face curvature prevents coating clogging and enables mechanical clamping for reliable torque transmission.

An intermediary wedge assembly stabilizes bolt heads against lateral forces, reducing stress concentrations and facilitating easy removal of wear components.

A rigid drive adaptor transmits axial force to helical fasteners via an abrasive outer periphery.

Axial wrench retainer lugs enable ratcheting adjustment of compressive coil spring pre-load without disassembly in inaccessible vehicle locations.

A semi-left-hand-thread-removal screw uses a reverse thread to enable rapid unscrewing.

A multilobular fastener head features a modified trailing surface zone that increases local diameter to create a wedging effect for stable tool engagement.

Reinforced thermoplastic pin with tapered body and extraction hole enables rapid injection molding production.

An eccentric centering element enables position corrections on plastic processing tools without drilling new bores.

Tapered recess forms interference fit with tool lower engagement section to resolve stick fit issues and ensure reliable torque transfer.

A cam lock fastening device induces a vertical clamping load between seat components through rotational displacement.

A fastening element features a thread profile with variable lead angles to facilitate rotation during insertion.

Oblique notches on a conical securing member engage specialized torquing members, resisting removal by common tools while withstanding high torque loads.

An eccentric nut design improves stress distribution and tensile strength while reducing hydrogen embrittlement risks.

Segmented screw head tool wells resolve the conflict between ornamental shape and fastening versatility.