Dowels TRIZ Cases

A dual-tube slip-lock rockbolt dissipates tensile energy through controlled sliding, then locks to resist pull-out in unstable ground.

A self-drilling hollow-wall anchor uses retracting expandable wings to improve pull-out resistance while reducing assembly complexity and cost.

An inner split-tube insert boosts bore-wall pressure and pull-out resistance in friction bolts without resin or extra installation steps.

A plated sleeve insert with outer stabilizers helps align ledger fasteners, prevent rotation, and spread loads to reduce splitting and wind-related failure.

A cage-like deformable anchor uses segmented ribs for controlled expansion, strong impact resistance, and floor-safe post installation.

Localized weld strips form stable cutting elements on expansion sleeves, improving undercut cutting while limiting heat-related strength loss.

Adjustable housings and locking members let one coupling fit varied valve and actuator geometries while cutting custom parts, lead time, and inventory.

A shear support sleeve shifts shear loads off the anchor bolt, enabling a smaller thread section and standard borehole installation.

Thinwall split segments and selective threads let a wallboard anchor install without pre-drilling while improving pull-out retention in friable drywall.

A soft sleeve with harder expansion inserts cuts screw-in torque while forming strong wall contact and undercuts in smooth or hollow substrates.

A drilling head and expandable sheets let the bolt cut into cement directly, avoiding pre-drilling while maintaining secure fixation.

Varying shaft sections, radial fins, and a full-length channel improve dowel retention and alignment without splitting joined members.

Trapezoidal sleeve edges and segmented lugs let the anchor adapt to concrete cracks while maintaining alignment and pull-out resistance.

Y-shaped notches and radial ridges let the dowel expand without breaking, improving axial grip and resistance to extraction.

A two-piece tab-and-shaft fastening assembly secures ladder safety accessories quickly while providing stable attachment under high load.

Three hinged prongs fold into a stripped door screw hole, then expand as the screw advances to restore holding strength without drilling.

An L-shaped anchor uses a perpendicular leg and friction features to stop rotation and improve pull resistance in hollow boards.

Using two plastics with different stiffness, the anchor expands in solid substrates and bends in hollow ones for secure fastening.

Dual-pitch expansion surfaces combine axial and rotational motion to improve anchor expansion and prevent unwanted rotation during clamping.

A pivoting-abutment standoff fastener transfers attachment loads to the anchor base, avoiding compressive damage to weak plasterboard.

A radial bullet flange stops lamella overexpansion in pre-drilled bore holes, preserving dust space and improving anchor shear strength.

Tilting locking teeth with curved undersides boost borehole anchoring strength and pull-out resistance using simple push-in installation.

Pivoting bracket elements act as lever arms to raise radial expansion force, cutting a secure undercut with less axial force.

An anchor that projects beyond the screw prevents bottoming out in shallow drill holes, enabling full expansion and avoiding screw head breakage.

Deformable segmented legs guide anchor expansion to raise load capacity, confirm secure fitting, and limit wall and screw damage.

A rotary-tool-driven plug melts into a plastic panel to permanently fill holes with a flush, durable finish without panel replacement.

Two anchor sections with different expansion-leg rigidity cut insertion force while improving holding values in solid and perforated bases.

A trapezoidal sliding-block anchor expands against blind-hole walls to replace weak rubber-cap friction and prevent loosening.

Toggle-like sleeve buckling lets this anchor adapt to plasterboard thickness while maintaining secure, low-force anchoring with clear installation feedback.

A dumbbell-shaped anchor rod uses separate shear absorbance and yield regions to improve load behavior while reducing material use.

A separate shear absorbance sleeve boosts drop-in anchor shear capacity while enabling defined failure behavior and lower material use.

An angled transition edge lets the expansion sleeve build resistance progressively, improving anchor hold with lower manufacturing effort.

A hard-soft overmolded expansion plug improves hole sealing, guides screw insertion, and reduces burr defects for more uniform anchoring.

A modular anchor tool swaps drill bit and expansion holders to install self-drilling and non-self-drilling anchors faster.

An eccentric cam toggle bolt replaces deformable wire springs and separate nuts to improve fastening durability and installation ease.

A break-off plug strip conceals decking fastener holes while reducing plank waste and preserving a seamless color and texture match.

Larger rear outlet openings and a reduced rear diameter let injected composite form a sealing ring that blocks moisture ingress in masonry anchors.

A hollow shaft, partial thread, and expanding hardening mass let this insulation anchor fasten securely in soft insulation without pre-drilling.

Passage openings route sealant around a plastic expansion plug during screw fixing, sealing the borehole gap against moisture ingress.

Dual-slope expansion surfaces add circumferential spreading during tightening, improving anchor hole grip while reducing unwanted rotation.

A recessed locking nut display face keeps rock bolt ID and traceability markings readable by preventing driver tool damage during installation.

A reduced-diameter transition part lets the expanding sleeve contact the hole wall properly, improving anchor load and stability across substrate strengths.

An integrated drilling element and anchor body eliminate pre-drilling, enabling faster drywall installation with secure fastening.

A pivoting captive toggle enables secure hollow-wall fastening without pre-drilling, reducing rear-surface damage in plasterboard.

Flexible open-cell foam lets the anchor sleeve fit different rod diameters, improve mortar distribution, and reduce the spaghetti effect.

A built-in UV radiation source cures injection mortar on demand, cutting temperature-dependent anchor curing time while preserving adjustment time.

A fixed internal catch stops tendon ejection under high loading while preserving expander activation and simpler rock bolt assembly.

Separate flush expansion webs release internal adhesive during screw insertion, giving immediate anchoring and stronger bonding after curing.

Two nested anchor sleeves with expandable connectors and adjacent clearances improve expansion, load capacity, and anchoring in solid and hollow materials.

A breakaway centering unit adds a second support point to keep anchor rods coaxial in adhesive-filled boreholes and strengthen the bond.

A reduced-diameter transition part guides the expanding sleeve into the wall gap, improving friction fit, pull-out resistance, and anchoring stability.

A split sleeve wedges between the anchor body and drilled hole under pull-out load, boosting friction and reducing concrete cone failure.