A helmet, comprising: an outer shell; a head mount, configured to conform to the head of a wearer; and a plurality of connectors, each provided between the outer shell and the head mount and each connected to the outer shell and head mount; wherein the connectors are configured to suspend the head mount within the outer shell such that, in use, an air gap is provided between head mount and the outer shell; wherein the connectors each have a first connection point connected to the outer shell and a second connection point connected to the head mount; and at least one connector is configured such that, under tensile loading between the first and the second connection points, the connector extends with a first modulus of elasticity up to a threshold extension and extends with a second modulus of elasticity beyond the threshold extension.

A helmet, comprising: an outer shell; a head mount, configured to conform to the head of a wearer; and a plurality of connectors, each provided between the outer shell and the head mount and each connected to the outer shell and head mount; wherein the connectors are configured to suspend the head mount within the outer shell such that, in use, an air gap is provided between head mount and the outer shell; wherein the connectors each have a first connection point connected to the outer shell and a second connection point connected to the head mount; and at least one connector is configured such that, under tensile loading between the first and the second connection points, the connector extends with a first modulus of elasticity up to a threshold extension and extends with a second modulus of elasticity beyond the threshold extension.

A helmet may include an upper-body comprising a first outer shell coupled to a first energy-absorbing shell formed of expanded polypropylene (EPP), expanded polystyrene (EPS), expanded polyurethane (EPU), or expanded polyolefin (EPO). A lower-body may include a second outer shell coupled to a second energy-absorbing shell formed of EPP, EPS, EPU, or EPO, wherein an upper portion of the lower-body is nested within the upper-body and a lower portion of the lower-body extends to an outer surface of a lower portion of the upper-body. A strap anchor may be disposed between the upper-body and the lower-body, and be sandwiched between the upper-body and the lower-body with the strap anchor being adjacent to, and oriented towards, the lower-body. A strap may be coupled to the fastening device and coupled to the strap anchor for coupling the helmet to a head of a user.

A safety helmet with a helmet shell, with a bearing ring, with a rotatable actuating element (14) and with a transmission unit (15.1, 15.2). The transmission unit (15.1, 15.2) transmits a rotation of the actuating element to the bearing ring, so that the head size provided is changed. A helmet shell-side transmission piece (15.1) is non-rotatably connected to the actuating element (14) such that they rotate in unison, and a bearing ring-side transmission piece (15.2) is connected mechanically to the bearing ring. The helmet shell-side transmission piece (15.1) can move both relative to the actuating element (14) and relative to the bearing ring-side transmission piece (15.2) linearly in two opposite directions. The distance between the actuating element (14) and the bearing ring can be changed thereby.

A safety helmet with a helmet shell, with a bearing ring, with a rotatable actuating element (14) and with a transmission unit (15.1, 15.2). The transmission unit (15.1, 15.2) transmits a rotation of the actuating element to the bearing ring, so that the head size provided is changed. A helmet shell-side transmission piece (15.1) is non-rotatably connected to the actuating element (14) such that they rotate in unison, and a bearing ring-side transmission piece (15.2) is connected mechanically to the bearing ring. The helmet shell-side transmission piece (15.1) can move both relative to the actuating element (14) and relative to the bearing ring-side transmission piece (15.2) linearly in two opposite directions. The distance between the actuating element (14) and the bearing ring can be changed thereby.

A helmet, comprising an outer shell; a head mount, configured to be mounted on the top of the head of a wearer of the helmet; wherein the head mount is suspended within the outer shell such that, in use, an air gap is provided between head mount and the outer shell; the helmet further comprises a head engagement device that is mounted on a surface of the head mount, that is configured to face the head of a wearer of the helmet, such that the head engagement device can move relative to the head mount; and a low friction interface is provided between the head mount and the head engagement device.

A ratchet mechanism for a hard hat and method of assembling the same are provided. The ratchet mechanism includes a knob with knob protrusions. The ratchet mechanism also includes a ratchet gear. The ratchet gear includes teeth engagement mechanisms. Each teeth engagement mechanism includes a hooking mechanism and a tooth protrusion. Each hooking mechanism is configured to engage with the knob protrusions. The ratchet mechanism also includes a band housing configured to allow a band to ratchetably move within the housing. The band housing also includes a knob engagement protrusion and a ratchet gear aperture configured with one or more teeth defining a ramped surface. The ratchet gear is disposed on the knob engagement protrusion and includes one or more ratchet gear teeth configured to engage with a set of band teeth on the band, such that the rotation of the ratchet gear tightens or loosens the band during operation.

A fit system for a helmet can include an adjuster including a width adjustment track, and first and second pods moveably coupled to the width adjustment track with a first and second support arm, the second pod comprising a lateral offset from the first pod. The fit system can further include a dial moveably coupled to the adjustor, such that movement of the dial changes a size of the lateral offset between the first pod and the second pod. The fit system can further include a hanger flexibly coupled to both the first pod and the second pod and adapted to allow for adjustment of the lateral offset between the first pod and the second pod. The hanger can further be adapted to allow for movement of the first pod and the second pod in a direction substantially perpendicular to the lateral offset without movement of the dial.

The present application discloses a helmet retention system for securing a helmet to the head of a user. In certain versions, the helmet retention system comprises a rear portion connected the rear of the helmet, a chin portion configured to receive the chin of the user, a first side upper strap extending from the rear portion to the front of the helmet, a second side upper strap extending from the rear portion to the front of the helmet, a first side lower strap extending from the rear portion to the chin portion, a second side lower strap extending from the rear portion to the chin portion, and an adjustment device operably attached to the rear portion. The adjustment device is configured to selectively and simultaneously adjust the length of the first side upper strap and the second side upper strap between the rear portion and the front of the helmet and simultaneously adjust the length of the first side lower strap and the second side lower strap between the rear portion and the chin portion.

A protective helmet with an outer shell for distributing impact forces, with a head support ring for placing on a head of a wearer of the protective helmet, and with an adjustment device for adjusting a circumference of the head support ring in order to adapt the latter to the head of the wearer. The adjustment device is guided through an opening of the outer shell so as to be operated from outside the outer shell. The protective helmet is characterized in that the adjustment device is designed to tension a spring device, during the adjustment of the circumference, in such a way that the tension of the spring device acts to transfer the head support ring to a basic circumference.