Abstract: A helmet accessory attachment member includes a finger-actuatable lock configured to secure an accessory attachment member mount to a helmet mount as part of securing an accessory such as a mandible guard to a helmet. The lock includes a pivot arm with a rotation axis that is parallel to the helmet surface, and also includes one or more blocking surfaces on the pivot arm to engage with grooves on the helmet mount. The lock may be positioned on a slidable insert of the accessory attachment member.

Abstract: A helmet accessory attachment member includes a finger-actuatable lock configured to secure an accessory attachment member mount to a helmet mount as part of securing an accessory such as a mandible guard to a helmet. The lock includes a pivot arm with a rotation axis that is parallel to the helmet surface, and also includes one or more blocking surfaces on the pivot arm to engage with grooves on the helmet mount. The lock may be positioned on a slidable insert of the accessory attachment member.

Abstract: Helmet-mounted display unit arrangements provide improved adjustability, including pitch, yaw, and/or vertical translation adjustment. In some embodiments, adjustments to one parameter do not affect the adjustability of other parameters. The helmet-mounted display and associated mount may be arranged such that the helmet-mounted display fits behind a helmet-mounted visor and/or in front of glasses being worn by the user.

Abstract: A helmet assembly having a helmet, a mandible guard, and an accessory attachment system that is used to selectively attach and secure the mandible guard to the helmet is disclosed. In some embodiments, the mandible guard is arranged to be detached from a first side of the helmet while remaining secured to a second side of the helmet. In such embodiments, the mandible guard may be moved outwardly and away from a wearer as the mandible guard pivots around the accessory attachment system attached to the second side of the helmet.

Abstract: A helmet accessory attachment member includes a finger-actuatable lock configured to secure an accessory attachment member mount to a helmet mount as part of securing an accessory such as a mandible guard to a helmet. The lock includes a pivot arm with a rotation axis that is parallel to the helmet surface, and also includes one or more blocking surfaces on the pivot arm to engage with grooves on the helmet mount. The lock may be positioned on a slidable insert of the accessory attachment member.

Abstract: Methods and devices for adjusting the position of a mandible guard relative to a helmet are disclosed. Adjustment of the mandible guard may be performed by a user while the user is wearing the helmet and/or without the use of tools. A mandible guard adjustment system may be combined with an attachment system for attaching and removing the mandible guard to a helmet.

Abstract: A contact surface, such as a seating surface on a mandible guard is adjustable such that variations in helmet geometry and/or mandible geometry can be accommodated. The mandible guard may be fixedly attached to a helmet with an attachment arm, yet be configured to permit adjustment of the height of the contact surface to reduce or eliminate a gap between the helmet and a guard portion of the mandible guard. A tilt arrangement may be provided between the attachment arm and the guard portion of the mandible guard to allow a wearer to adjust a pitch angle of the guard portion relative to the attachment arm.

Abstract: A helmet earpiece is provided which includes a body, a first feature configured to fit with a complimentary first feature associated with a helmet, and a second feature configured to fit with a complimentary second feature associated with the helmet. The first and second features on the body may be configured to fit with the respective complimentary first and second features associated with the helmet to mount the helmet earpiece to the helmet. The first feature may include an opening, and a lock adjacent the opening. The lock has an unlocked position and a locked position, where in the unlocked position, the opening may be configured to receive the complimentary first feature associated with the helmet, and in the locked position, the lock may be configured to retain the complimentary first feature in the opening.