Abstract: The present shock absorbing layer for a helmet includes a base plate and a plurality of spaced apart, independently and elastically collapsible, shock absorbing members. These hollow shock absorbing members define a closed perimeter wall extending upwardly from the base plate to an open top end sized to cause negligible reduction of fluid flow exiting the shock absorbing member. The closed perimeter wall includes a first portion with opposed inner and outer surfaces each having the shape of a frustum, and a second portion with opposed inner and outer surfaces each also having the shape of a frustum. These inner surfaces are interconnected through relatively radially wider ends of their respective frustums to define an inner angle therebetween of less than 180 degrees. These outer surfaces are interconnected through relatively radially wider ends of their respective frustums to define an outer angle therebetween of greater than 180 degrees.

Abstract: The present shock absorbing layer for a helmet includes a base plate and a plurality of spaced apart, independently and elastically collapsible, shock absorbing members. These hollow shock absorbing members define a closed perimeter wall extending upwardly from the base plate to an open top end sized to cause negligible reduction of fluid flow exiting the shock absorbing member. The closed perimeter wall includes a first portion with opposed inner and outer surfaces each having the shape of a frustum, and a second portion with opposed inner and outer surfaces each also having the shape of a frustum. These inner surfaces are interconnected through relatively radially wider ends of their respective frustums to define an inner angle therebetween of less than 180 degrees. These outer surfaces are interconnected through relatively radially wider ends of their respective frustums to define an outer angle therebetween of greater than 180 degrees.

Abstract: The invention relates to a portable handheld work apparatus including a chain saw, a vacuum/blower apparatus or the like. The work apparatus has a handle (2) for carrying and guiding the work apparatus (1). Thumb supports (4, 5) are provided on both sides with respect to the longitudinal axis (3) of the handle (2).

Abstract: A closure arrangement of a container has fill socket with an inner thread and a closure cap with a cylindrical base body having an outer thread matching the inner thread of the fill socket of the container. The cylindrical base body has an annular flange adjacent to the outer thread. An annular seal, connected to one side of the annular flange facing the outer thread, is provided for sealingly resting on the rim of the fill socket when the closure cap is threaded into the fill socket. The outer thread has a resilient tongue extending in the circumferential direction of the cylindrical body and has a radial projection cooperating with the abutment of the matching inner thread. The radial projection, when the closure cap is threaded into the fill socket, catches in a catch position behind the abutment before a fully closed position of the closure cap in the fill socket is reached.