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US 2026/0076435 A1Published application
Hard Hat with Impact Protection Materials
AssigneeMilwaukee Electric Tool Corporation
InventorJoseph R. Worple
Life of this patent
Estimating the term…
Abstract
A hard hat including an outer shell, a linear impact absorbing material, and a rotational impact absorbing material is constructed of materials designed to provide protection to a wearer in extreme environmental conditions and under impact. In one embodiment, the rotational impact absorbing material is formed from a strain rate sensitive material in which the rigidity of the material increases under an impact.
Claims2
A protective work helmet, comprising:
- an outer shell, the outer shell comprising:
- an exterior surface;
- an interior surface defining a cavity sized to receive a head of a user;
- a crown portion configured to cover part of the head of the user, wherein a bottom segment of the crown portion defines a lower circumference extending along the exterior surface of the outer shell;
- a brim extending radially outward from a portion of the lower circumference;
- and
- a front mounting ridge configured to couple an accessory to the protective work helmet;
- and
- an impact absorbing insert comprising:
- a linear impact absorbing material positioned within the outer shell;
- and
- a rotational impact absorbing material positioned within the outer shell;
- wherein the impact absorbing insert is configured to provide a peak rotational acceleration under a Virginia Tech Test Method less than 5500 radians/second2, and wherein the peak rotational acceleration under the Virginia Tech Test Method is greater than 4000 radians/second2.
10 more elements
A protective work helmet, comprising:
- an outer shell, the outer shell comprising:
- an exterior surface;
- an interior surface defining a cavity sized to receive a head of a user;
- a crown portion configured to cover part of the head of the user, wherein a bottom segment of the crown portion defines a lower circumference extending along the exterior surface of the outer shell;
- a brim extending radially outward from a portion of the lower circumference;
- and
- a front mounting ridge configured to couple an accessory to the protective work helmet;
- and
- an impact absorbing insert comprising:
- a linear impact absorbing material positioned within the outer shell;
- a rotational impact absorbing material positioned within the outer shell;
- wherein the impact absorbing insert is configured to provide a rotational acceleration under a Virginia Tech Test Method between 4000 radians/second2 and 5500 radians/second2 and wherein the impact absorbing insert is configured to provide a peak linear acceleration under the Virginia Tech Test Method less than 145 meters/second2.
9 more elements
Dependencies are inferred from the claim text.