Dyson Technology Limited

Avon Protection Systems, Inc.

Tim John Maclean

Andrew Capon

Joshua James Tunstill

Richard Allix Braine

Ashley Jane Caddle

A cyclonic separation apparatus includes an outer wall, an inner wall and a cyclonic chamber defined between the outer wall and inner wall. A section of the surfaces of both the outer wall and the inner wall are flattened. The inner wall and the outer wall are also concentrically arranged. During use a fluid moving around the cyclonic chamber flows between a curved passage and a flattened passage of the cyclonic chamber.

Cyclonic separation apparatus

A respirator speech transmitter and exhalation valve module comprising a resilient exhalation valve having a low airflow resistance for exhalation but providing a secure seal against inadvertent inhalation through the exhalation valve module. An exhalation airflow channel is formed between a module body on the outside of the channel and a conical airflow guide and the exhalation valve on the inside of the channel. The exhalation airflow channel is in the form of an amplification horn. The airflow channel produces a smooth airflow for unrestricted exhalation and high intelligibility of a user's speech. The module includes a drinking conduit for selectively fluidly connecting a mouthpiece in the respirator to a beverage container and further includes an electrical communication block with internal and external fittings for connecting a microphone in the mask to a radio or amplifier carried by the mask user.

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Bath, United Kingdom

Tim John Maclean