Patent ID: 9332798
Filing Date: 2016-05-10
CPC Classification: A42B,A43C,Y10T

Claim Text:
1. A device for fastening and adjusting a strap of safety helmets, comprising: a base body structured to allow insertion of at least part of the strap, a ratchet pivotable around a first pin, said first pin extends through the inside of said ratchet and constrains said ratchet to said base body, said ratchet being provided with at least one coupling portion adapted to engage at least one corresponding portion of said strap, and a first spring interposed between and connected to said ratchet and said base body to reversibly retain said ratchet in at least one position of engagement with said strap, an operating lever to rotate said ratchet from said at least one position of engagement with said strap to at least one position of disengagement from said strap, reversibly overcoming the opposition of said first spring, a second spring adapted to maintain said operating lever in at least one resting position not coincident with said position of contact with said ratchet, wherein said operating lever is constrained on said ratchet in a rotatable manner for at least one given angular interval, the operating lever being rotatable around a second pin different from said first pin, said second pin being constrained to seats provided on said ratchet, and wherein said second pin extends through the inside of said lever and constrains said lever to seats provided on said ratchet.