Patent protection on most of the wedge lock washer features has long expired, as the product was made in the early 1980's. Any company could now make a wedge lock of Nord's original style. Nord-lock moved their development and marketing efforts to the Nord-Lock X-series that includes a conical (Belleville) spring washer along with the wedge lock. They also continue to develop their specialty materials and processes.
Have you bought the technology from Nord-Lock or have you bought the company (Nord-Lock)?
Patent protection on most of the wedge lock washer features has long expired, as the product was made in the early 1980's. Any company could now make a wedge lock of Nord's original style.
Nord-lock moved their development and marketing efforts to the Nord-Lock X-series that includes a conical (Belleville) spring washer along with the wedge lock. They also continue to develop their specialty materials and processes.