Abstract: Hydrotherapy apparatus including a rigid elongated conduit having a supply orifice and a discharge orifice. The conduit is mounted for swivel movement to enable the discharge orifice to traverse a path characterized by a series of small circular or semicircular path segments linked by translational path segments. The conduit is moved along said path by reaction forces produced by the discharged stream. The stream is produced by a supplied water jet which entrains air and/or tub water, as selected by the user. Valve means are provided for selectively varying the amount of air entrainment and/or water entrainment and/or supplied water jet.

Abstract: A hydrotherapy method and apparatus for discharging a fluid stream through an opening in the wall of a water tub, while concurrently translating the stream, to impact against and massage the body of a user.

Abstract: Hydrotherapy apparatus including a rigid elongated conduit having a supply orifice and a discharge orifice. The conduit is mounted for swivel movement to enable the discharge orifice to traverse a path characterized by a series of small circular or semicircular path segments linked by translational path segments. The conduit is moved along said path by reaction forces produced by the discharged stream.

Abstract: A hydrotherapy method for discharging a water stream through a rigid conduit while concurrently translating the conduit discharge orifice along a nonlinear path describing an area. The conduit is comprised of a supply section and a discharge section having an axis misaligned with the supply section axis for discharging a stream in a direction tending to rotate the conduit around the supply section axis. Frictional loading of the conduit, attributable to suction produced by the supply water jet, is mitigated by providing a passageway which permits the suction to draw tub water into a cavity for entrainment by the water jet for discharge through the conduit.

Abstract: A hydrotherapy jet assembly and/or installation configured to discharge a high intensity stream into a water tub without requiring air entrainment. Passageway means are provided for drawing water from the tub into the mixing chamber of a jet assembly for entrainment by a water jet. The stream discharged from the jet assembly into the tub is comprised of (1) water supplied under pressure into the mixing chamber by a water jet nozzle and (2) water drawn from the tub for entrainment by the water jet. The effect of tub water entrainment is to produce a high intensity stream for impacting against a user's body without significantly lowering the temperature of the water pool in the tub.

Abstract: A hydrotherapy method and apparatus for discharging a fluid stream through an opening in the wall of a water tub, while concurrently translating the stream along a random path, to impact against and massage the body of a user.

Abstract: A hydrotherapy method and apparatus for using available tap water supply pressure to mix fresh tap water, tub water, and air to discharge a water-air stream into a tub below the water surface. Energy derived from the tap water supply is used to concurrently translate a discharge nozzle along a path substantially transverse to the stream discharged from the nozzle.

Abstract: A hydrotherapy method and apparatus for discharging a water stream through a rigid conduit while concurrently translating the conduit discharge orifice along a nonlinear path describing an area. The conduit is comprised of a supply section and a discharge section having an axis misaligned with the supply section axis for discharging a stream in a direction tending to rotate the conduit around the supply section axis. Frictional loading of the conduit, attributable to suction produced by the supply water jet, is mitigated by providing a passageway which permits the suction to draw tub water into a cavity for entrainment by the water jet for discharge through the conduit.

Abstract: A hydrotherapy method and apparatus for discharging a fluid stream through an opening in the wall of a water tub, while concurrently translating the stream, to impact against and massage the body of a user.

Abstract: A hydrotherapy apparatus for using available tap water supply pressure to mix fresh tap water, tub water, and air to discharge a water-air stream into a tub below the water surface. Energy derived from the tap water supply is used to concurrently translate a discharge nozzle along a path substantially transverse to the stream discharged from the nozzle.

Abstract: A hydrotherapy method and apparatus for discharging a fluid stream through an opening in the wall of a water tub, while concurrently translating the stream along a random path, to impact against the massage the body of a user.

Abstract: An improved breathing method and apparatus for enabling a user, while at a first altitude, e.g. sea level, to experience higher altitude conditions. The apparatus includes an inspiratory tube and an expiratory tube and means for mixing a portion of oxygen-reduced expired air with ambient air to supply air for inspiration. The first ends of the inspiratory and expiratory tubes are coupled to the users airway through a user breathing means. The remote end of the expiratory tube is coupled through a (carbon dioxide) CO.sub.2 absorber canister to an air storage reservoir. The remote end of the inspiratory tube is also coupled through a CO.sub.2 absorber canister to the reservoir for pulling oxygen-reduced air therefrom. The user breathing means includes a selectively dimensioned orifice to the environment so that on expiration, a predetermined portion of the user's expired air is exhausted to the environment while the remainder passes through CO.sub.2 absorber material into the reservoir.

Abstract: An improved breathing method and apparatus for enabling a user, while at low altitude, e.g. sea level, to acclimate himself to high altitude conditions. The apparatus includes an inspiratory tube and an expiratory tube and means for selectively mixing a certain portion of oxygen-reduced expired air with ambient air to supply air for inspiration. The first ends of the inspiratory and expiratory tubes are coupled to a mouth and/or nose breathing mask. The remote end of the expiratory tube is coupled through a proportioning means to the environment and to a reservoir or air storage chamber. The remote end of the inspiratory tube is also coupled to the proportioning means so as to pull ambient air from the environment, as well as oxygen-reduced air from the reservoir. By varying the proportioning means, the ratio of ambient air to expired air, and thus the oxygen concentration of the inspired air, is varied so as to enable the user to select the particular elevated altitude to be simulated.

Abstract: A cuff system particularly useful with tracheal tubes and the like including an expandable cuff insertable into a patient's trachea for sealing engagement with the trachea wall. The cuff is formed around an elongated tubular member by a flaccid readily deformable non-distensible wall. A liquid reservoir comprised of a flaccid readily deformable wall communicates with the cuff via a filling pipe whose ends respectively open into the reservoir and cuff. The reservoir is mounted in a semi-rigid squeezable protective housing. The cuff system interior volume enclosed by the reservoir, filling pipe, and cuff contains no gas and is supplied with the cuff evacuated and lying against the tubular member and with the reservoir and filling pipe containing a quantity of liquid. A selectively operable valve is provided to control flow through the filling pipe.

Abstract: A general anesthesia rebreathing system comprised of a disposable portion adapted to be easily coupled to and decoupled from a permanent portion. The system is designed so as to minimize the structural complexity and cost of the disposable portion while assuring that the disposable portion includes all elements which are likely to contaminate gases inhaled by a patient. The disposable portion includes conventional breathing tubing for coupling a source of fresh gas, as from an anesthesia machine, to a patient and in addition an overflow tube for coupling the patient end of the system to an overflow (pop-off) valve, preferably mounted on the machine and constituting part of the permanent portion. The overflow tube entrance is located close to the patient end of the system and in communication with the tubing which conveys expired gas to a reservoir, such as a conventional breathing bag, mounted at the machine end.

Abstract: An automatic swimming pool cleaner comprised of a car adapted to travel underwater along a random path on the pool vessel surface for dislodging debris therefrom. The car wheels are driven by a water powered turbine to propel the car in a forward direction, along the vessel surface. In order to prevent the car from being driven into a position, as for example against a vertical wall, from which it cannot emerge, a wheel geometry is employed which, upon contact, develops a horizontal force component parallel to the vertical wall, to thus enable the car to spin off. Alternatively, or in combination, a water flow produced reaction force can produce a torque to turn the car with respect to the engaged wheel to enable the car to spin off. The car is designed with a low center of gravity and a relatively buoyant top portion so as to produce a torque which maintains the car correct side up when on the pool bottom.