Abstract: A pulmonary exercise device includes a tubular body with an air inlet, an air outlet and a mouthpiece. The air inlet is closed by a one-way valve arrangement which is resiliently biased using a spring. The air outlet is closed by a one-way valve arrangement which is resiliently biased closed by using a spring. In another aspect, the inlet and outlet are closed off by respective one way valves which prevent airflow in one direction and allow only a restricted flow in the other.

Abstract: The device includes a locator on the first member for locating an end section of the second member. A movable locking lever is mounted on the second member and an operating member is provided which enables the locking lever to be moved from a position in which the end section is locked in position on the locator by the locking lever to a further position in which the locking lever permits the end section to be separated from the locator. The operating member is a rotary member rotatable about the longitudinal axis of the second member and has a surface thereon which co-operates with the locking lever whereby rotation of the rotary member effects movement of the locking lever.

Abstract: A plurality of plastic panels or planks (12) are connected to each other in side by side relation by interfitting male and female connectors (28, 30) to form a planar structure such as a cover (10). The male connector (28) has opposed outer planar surfaces (32, 34) in contact relation to opposed inner planar surfaces (46, 48) on a female connector (30) to minimize any relative pivoting or articulating movement between adjacent panels (12). Adjacent panel sections (15A, 17B) are hinged to each other about hinges (35E) to permit the panel sections (15A, 17B) to be folded against each other for stacking. Alternatively panels 14C, 14D may be linked together for stacking. A side support (16) is secured to the sides of the cover (10) to cover and to support a side of a panel where such side is not connected to another panel.