Load Modified Fasteners TRIZ Cases

Synchronized nut and tension-rod rotation with force sensing enables accurate automated tightening without complex clutch mechanisms.

A two-part threaded fastener locks internal stress after installation to resist loosening in blind holes without washers, wires, or adhesives.

A metal deformable ring between washers gives clear visual feedback of bolt tension loss, resisting wear and repeated tightening cycles.

An offset screwbolt hole drives the rail clip toward or away from the rail, simplifying installation and maintenance without manual repositioning.

Compression-force sensing and a tension rod automate bolt tightening while maintaining equal surface pressure and reducing assembly damage.

A biased split-bore anchor keeps threaded rods aligned and fully engaged in concrete, preventing incomplete collapse and insecure fastening.

Multiple pressure chambers tension jack bolts simultaneously, cutting installation time while keeping fastener preload even and reliable.

Radially slidable nut halves and guide surfaces enable secure locking on threaded sections without extensive rotation while generating high contact pressure.

Visual bolt head markings and adjustment features help align expansion bolts in-hole and identify length or material after installation.

A coupling mechanism keeps the sheared torque head attached to the bolt, preventing falling parts during overhead cable installation.

An asymmetrical progressive thread profile spreads clamp load more evenly to resist self-loosening and fatigue in assembled joints.

A threaded anchoring head and bolt pretension rebar securely while reducing beam-joint congestion, rebar length, and concrete pouring difficulty.

Bottom-head ribs create abrupt torsional friction during tightening, signaling sufficient engagement and helping prevent shank failure.

Unequal thread thickness balances shear strength in dissimilar materials, cutting parasitic weight and enabling controlled release.

Guiding members self-center the jackbolt head in MJT sockets, cutting manual alignment time and operator fatigue during fastening.

A twist-break section snaps at a preset torque to secure object coupling and prevent loosening with a stable fastening effect.

An external guide keeps the piston and fixation element from rotating, cutting wear and easing maintenance in hydraulic bolt tensioning.

Dome-shaped washers and a thin-walled dye container reveal rock bolt load thresholds instantly without added measuring devices.

A releasable fitting piece limits fastening torque after secure engagement, preventing stripped screws and object damage from over-tightening.

A ratchet nut, elastic pawl, and notched tab washer lock bolts against loosening while enabling preset torque and controlled disassembly.

Wireless RFID sensing detects fastening member displacement without optical fiber cables or special bolt and base structures.

A displacement element blocks further tightening at maximum contact pressure, protecting modules and main bodies from overstress.

Material removal forms a reduced-diameter band so a rock bolt breaks predictably under tensile load without brittle fracture or lost energy absorption.

Measured material strength is used to tune shear nut groove geometry so the failure point breaks at the planned torque with tighter tolerance.

Material removal forms a consistent circumferential notch so a rock bolt fails predictably under tensile load without work hardening.

A tapered stud and sleeve distribute torque and stress in fluid pump stay rods, reducing stress risers, fatigue, and breakage.

A spring-loaded sleeve and stud maintain preload while allowing tool-free separation, visual torque setting, and vibration-resistant fastening.

Multiple pressure bolts and a tapered expansion sleeve deliver high clamping force and easier loosening in restricted installation spaces.

Bolt-induced pretension in a threaded rebar anchoring head replaces hooks, reducing joint congestion, rebar use, and pouring difficulty.

Torque-limiting notches and locking thread wings let a sanitary fitting nut tighten in fewer turns while preventing plastic thread damage.

A thermal securing element breaks torque transmission above a critical temperature, preventing drive train damage before torque overload limits are reached.

A base-mounted capacitive electrode measures anchor pull-out displacement without fragile in-anchor sensors, improving durability under construction loads.

Dual-motor bolt tightening combines thread engagement and compression-force sensing to automate fastening while maintaining precise axial force.

Angled guiding members center and align jackbolt heads in MJT sockets, cutting manual positioning time and operator fatigue.

An insulated helical conductor in a chemical anchor fastener tracks impedance changes in cured material to detect early loosening or damage.

A grooved breakaway locknut and controlled friction deliver repeatable bolt prestress without expensive torque tools, while allowing easy disassembly.

A dual rotary drive automates locking ring installation on threaded bolts, improving assembly speed, positioning, and torque control.

A two-fastener assembly uses a frangible section to limit installation torque while maintaining secure retention until a defined breaking force.

Hydraulic pressure chambers tension fasteners uniformly across multiple jack bolts, cutting installation time and avoiding uneven loading failures.

An internal retaining ring with a resilient tongue locks a threaded nut inside a hollow shaft, improving camera mount safety without added bulk.

Holding claws lock the nut from the front, preventing dislodging during anchor hammering while preserving torque limiting and setpoint torque checking.

Using exactly three torque-transmitting webs, this fastening design improves breakaway precision while reducing tolerance sensitivity and complexity.

Hydraulic or mechanical compression of a conical sleeve locks screw connections against dynamic loosening without re-tensioning.

A >45° minimum-wall web angle resists hammering loads, preventing premature weakening and reducing torque scatter in fracture nuts.

A breakaway non-threaded lead section helps align small screws in hollow hinge channels, improving handling before final threaded engagement.

An elastic buffer and low-friction sliding disk let one screw fit varying sheet thicknesses while preventing jamming, rattling, and overtightening.

A threaded bolt-head connection enables head-side tensioning and axial force detection while limiting added parts and reducing loosening risk.

A slotted hex portion lets a breakaway nut split and fall away from a cable, preventing trapped remnants and later interference.

A form-fitting head-shank coupling blocks axial pullout and tightening-direction rotation, enabling longer high-strength screws at lower cost.