Abstract: A two-part buckle is provided with springing structure associated with web securing structures of the buckle parts, and with structure allowing deflection within the buckle part to at least partly absorb tensile forces applied to the buckle.

Abstract: A device for enabling a first part to be detachably assembled to a second part, the device comprising a first fastener and a second fastener fixed respectively to the first part and to the second part, assembly being obtained by engaging the fasteners along an "Engagement" axis, with engagement causing a retaining component of the first fastener to be inserted by deformation into a reception component of the second fastener, wherein:the first fastener is fitted with return means tending to move it away from the second fastener;the second fastener includes resilient means exerting pressure on the retaining component when inserted in the reception component to keep it therein, said resilient means being fitted with a return device to move them away from the retaining component during detachment; andthe retaining component and the reception component are complementary in shape.

Abstract: A strap fastener for a motorcycle helmet is constructed of a unitary jacket that defines a hollow shell and latch tripping lever arms. A latching fork has a pair of resilient, generally parallel legs and can be slipped through a fabric loop which is attached to one side of the helmet. A fabric strap, secured to the other side of the helmet, is threaded through slots in a catch. The fork and catch are inserted into the jacket shell from opposite longitudinal directions. As the catch approaches the tips of the legs of the fork within the enclosure of the shell, it deflects feet defined upon the legs, overcoming the spring bias of the legs. When the catch is fully inserted, the feet of the fork legs spring back and engage hooks on the catch. The fork and the catch can be disengaged by depression of the lever arms on the jacket. The lever arms act through transverse apertures in the jacket.