Patent ID: 8156574
Filing Date: 2012-04-17
Classification: A42B

Abstract:
1. A protective helmet, comprising: a hard shell portion for covering and providing protection to a wearer's head; a lining secured to an inner side of said hard shell portion; and an adjustment mechanism coupled to said hard shell portion, said adjustment mechanism including a clutch mechanism and an adjustment mounting pad, wherein an inner surface of said lining and an inner surface of said adjustment mounting pad define an interior region; wherein said clutch mechanism includes an adjustment knob that is manually engageable to adjust a size of said interior region; wherein said clutch mechanism substantially prevents the adjustment of said size of said interior region in the absence of said manual engagement; wherein said clutch mechanism includes a coil spring, a clutch element and a pinion, the coil spring including a diameter, wherein manual rotation of the adjustment knob engages a portion of the coil spring so that the coil spring diameter changes, wherein the changing of the coil spring diameter causes the coil spring to move away from, and disengage from, the clutch element thereby enabling the adjustment knob to rotate the pinion and adjust the size of the interior region.