3m Innovative Properties Company

Henning T Urban

William Bedingham

Caroline M Ylitalo

Jason A Graves

Richard C Webb

Van Cuong Bui

Caitlin E Meree

Andrew W Long

Assumpta A G Bennaars-Eiden

Jonas A Nilsson

Benjamin H Cooper

Daniel B Taylor

John A Duff

Patrick Hjort

A ring-shaped cushion for a hearing protector or audio headset. The cushion has a circumferential contact pad for sealing on a wearer's head and an attachment for sealing with an earmuff. The cushion further has a sound insulation tube that inwardly defines an inner space. The sound insulation tube extends between the contact pad and the attachment. The cushion has a ventilation passage that extends entirely through the cushion between an inlet opening in the contact pad and an area outside of the inner space. The cushion may further include one or more physiological sensors to monitor the health of a wearer.

Cushion for a hearing protector or audio headset

There is provided an exhaust apparatus for connection to a personal protection respiratory device that defines a filtered air volume adjacent to the face of a wearer and comprises at least one exhalation, the apparatus comprising a blower in fluid connection with the at least one exhalation valve, the blower being responsive to the wearer's respiratory cycle to draw a substantial portion of the wearer's exhaled breath through the at least one exhalation valve wherein, in response to the wearer's respiratory cycle, the blower operates throughout the wearer's exhale breath, or a substantial period thereof, and does not operate throughout the wearer's inhale breath, or a substantial period thereof.

Powered apparatus for a personal protection respiratory device

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Durham, United Kingdom

Henning T Urban