Dowels TRIZ Cases

Multiple resin zones give a rock bolt strong end anchorage, corrosion protection, and controlled yielding during seismic ground movement.

Circumferentially expandable anchor retention lets a grout sleeve hold the anchor during installation, then accommodate expansion without tearing.

A thin coupling strap keeps anchor support feet intact during drilling, then tears on screw insertion to secure gypsum board fixation.

A rotating counter-plate and integrated bushing let heavy fixtures mount through one circular front-side hole without damaging plasterboard.

A widened rear flank in the expansion sleeve groove follows the expansion body contour to improve load transfer and prevent anchor slippage.

A localized bulged zone on the anchor bolt improves lateral load transfer and symmetry without interfering with shell expansion or installation.

A sealed thread coating blocks mortar ingress in deep-set chemical anchors, enabling cone activation and full load capacity.

A temporary form fit between the sleeve and abutment wall raises pull-out resistance while keeping expansion forces low to protect concrete.

A threaded sleeve shifts screw load away from the beam, preventing push-off and keeping a one-sided panel fastening stable.

By measuring anchor tip position in the substrate, this case tracks expansion behavior, load capacity, and damage more reliably than pretension sensing.

A screw-expanded sealant anchor keeps later boreholes watertight in composite waterproofing layers by pressing elastic material outward.

A bolt anchor is set without a preinstalled nut by sizing thread overhang so a cap nut can later drive sleeve expansion and secure anchoring.

Amorphous calcium carbonate raises anchor load capacity at high temperatures while preserving workable curing in aluminous cement mortar.

Dual annular grooves let the expansion sleeve pivot and form stronger borehole undercuts, improving anchor load values with less material.

A stretchable matrix around expansion webs enables defined dowel expansion, secure anchoring, and compatibility with different screw diameters.

An overmolded elastic sock seals the holed jacket, protects polymerization components, and enables fixation before curing is complete.

Hard Zn/Ni or Zn/Fe coatings plus an antifriction layer keep dowel friction stable under high pressure, reducing wear and improving anchoring.

UV curing inside the anchoring zone shortens mortar hardening time while keeping fasteners adjustable and less temperature-dependent.

An elastically mounted anti-rotation lock moves inward during insertion and outward with the fastener to prevent damage and secure the anchor.

Rotational unscrewing with a threaded drive pin and anchor removes fixtures from concrete with less damage, time, and anchor waste.

A pointed anchor with a hinged back portion and resilient member penetrates friable plasterboard directly and secures flush fixing without drilling.

Peripheral cutting edges and a smaller secondary thread help an insulation anchor penetrate hard plaster and pull the main thread into ETICS insulation.

Segmented threaded member blocks outer sleeve areas to prevent arm deformation into gypsum, ensuring stable gripping and anti-retraction performance.

Retainer nut converts stud rotation into axial wedge movement, increasing frictional engagement to prevent anchor bolt failure from insufficient expansion.

A plastic expansion anchor uses a weakened slot to buckle tongues radially, increasing friction against borehole walls without damaging the base material.

Segmented expansion anchors combine rigid inner and deformable outer tubular bodies to secure heavy loads in non-compact walls.

Profiled internal bore fixes static mixer position to prevent slipping under high pressure and ensure immediate filling of rock mass gaps.

Segmented sieve sleeve design reduces assembly complexity and hardening material waste by adapting to varying borehole depths.

Segmented locking device transforms longitudinal insertion force into crosswise friction via inclining surfaces, resolving high engagement force requirements.

A bolt protrusion resists sleeve rotation during initial insertion to prevent misalignment.

Sliding section reduces impact energy by adapting to the expansion body, while an annular step cuts the borehole wall to create a secure undercut.

A toggle fastener sleeve uses a radially movable engagement element to provide stiff support for the screw during assembly.

Rotation clears borehole debris to prevent panel damage and ensure secure anchoring.

Rotating the threaded sleeve drives a conical element to expand the anchor sleeve, eliminating separate spacer components and simplifying installation.

Tilting spreader elements in an expansion anchor adapt to uneven borehole walls, resolving the trade-off between insertion ease and pull-out resistance.

Expandable wings and threaded legs engage hollow or solid walls, resolving adaptability versus retention trade-offs.

A filling disk with a non-circular through-hole prevents blockage of the annular gap, ensuring reliable fastening.

An anchor with an expansion section and cutting thread creates a mechanical undercut in drilled holes.

Arcuate edges on expansion segments create stress peaks that improve hold in boreholes.

A flat fastener uses a cam mechanism to pivot a distal section against the wall interior.

Opposite punctures form an asymmetric channel that improves load values and reduces friction during installation without complex tooling.

A metal anchor with a deformable clamping element adapts to large borehole diameter tolerances, ensuring secure frictional hold during overhead installation.

A toggle bolt catch stem contacts rotating wings to constrain movement, resolving the two-hand bottleneck during drywall installation.

Radial yoke bulges on curved tabs bridge gaps in variable boreholes, ensuring firm anchoring while minimizing expansion forces.

Inclined connector sections weaken during insertion, reducing installation force and torque requirements.

A pull-up bolt assembly uses a radially expandable friction member to securely hold heavy manway covers.

Dual channels guide adhesive along a helical groove to prevent surface contamination and ensure consistent distribution.

Cantilever spring elements with varying flexural rigidity adapt to diverse screw diameters for secure anchoring.

A wall anchor with a rotatable nose cone and trigger mechanism simplifies manual installation into substrates.