Washers TRIZ Cases

Segmented drilling and tapered threading merge hole-making and securing to eliminate pre-drilling in dense fiber cement substrates.

A lock nut assembly uses a deformable protuberance on a thrust washer skirt to create a larger internal envelope for the lock ring.

Non-electrolytic zinc flake deposition on hardened washers prevents hydrogen embrittlement while maintaining hardness above 500 HV.

An annulus with radial cutouts compresses under tightening to generate spring bias, preventing nut loosening from vibrational loads.

A flexible tool apparatus extends through a hole to grasp and unfold a folding washer for blind bolt installation.

Curved thread forming elements adapt to blank diameter changes, preventing deformation and extending die life.

A support plate engages a plastic panel contour to secure it against a metal fender using a speed nut and bolt.

Circumferential and axial seals prevent air and water infiltration around the teeth and shank, protecting against corrosion.

Slits and selective rubber washers mitigate thermal expansion stress on the substrate while maintaining rigid positioning stability.

Segmented flanges connected by bridges compress axially to provide secure jamming force while maintaining outer diameter constraints.

Asymmetric support collars guide fastener insertion through unique profiles on opposite sides of the elongate fastener.

Mandrel shaping maintains the major surface of a rigid composite strip in one plane during forming.

Enlarged bolt holes with disc cams allow precise machine placement without doweling, reducing installation time while preventing lateral movement.