Here's an example of how a torsion spring hinge works. A bracket clips on to the lip of a composter. A steel rod joins the compost lifter to the bracket, creating a hinge.

Mayhew makes a spring-loaded hinge pin remover. The tool is assembled from three parts: a tool steel punch pin tip, a powerful spring, and a small weight attached to the spring’s end.

MIAMI, Sept. 11, 2023 /PRNewswire/ -- Innovative Eyewear, Inc. ('Innovative Eyewear' or the 'Company') (NASDAQ: LUCY; LUCYW), the developer of sma ...