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A ventilator device and system comprising a rotating compressor, preferably a drag compressor, which, at the beginning of each inspiratory ventilation phase, is accelerated to a sufficient speed to deliver the desired inspiratory gas flow, and is subsequently stopped or decelerated to a basal flow l

A ventilator device and system comprising a rotating compressor, preferably a drag compressor, which, at the beginning of each inspiratory ventilation phase, is accelerated to a sufficient speed to deliver the desired inspiratory gas flow, and is subsequently stopped or decelerated to a basal flow level to permit the expiratory ventilation phase to occur. The ventilator device is small and light weight enough to be utilized in portable applications. The ventilator device is power efficient enough to operate for extended periods of time on internal or external batteries. Also provided is an oxygen blending apparatus which utilizes solenoid valves having specific orifice sizes for blending desired amounts of oxygen into the inspiratory gas flow. Also provided is an exhalation valve having an exhalation flow transducer which incorporates a radio frequency data base to provide an attendant controller with specific calibration information for the exhalation flow transducer.

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A ventilator device and system comprising a rotating compressor, preferably a drag compressor, which, at the beginning of each inspiratory ventilation phase, is accelerated to a sufficient speed to deliver the desired inspiratory gas flow, and is subsequently stopped or decelerated to a basal flow l

A ventilator device and system comprising a rotating compressor, preferably a drag compressor, which, at the beginning of each inspiratory ventilation phase, is accelerated to a sufficient speed to deliver the desired inspiratory gas flow, and is subsequently stopped or decelerated to a basal flow level to permit the expiratory ventilation phase to occur. The ventilator device is small and light weight enough to be utilized in portable applications. The ventilator device is power efficient enough to operate for extended periods of time on internal or external batteries. Also provided is an oxygen blending apparatus which utilizes solenoid valves having specific orifice sizes for blending desired amounts of oxygen into the inspiratory gas flow. Also provided is an exhalation valve having an exhalation flow transducer which incorporates a radio frequency data base to provide an attendant controller with specific calibration information for the exhalation flow transducer. h can be utilized by an animal producer to supply of feed flow at a given stage in the animal's life cycle to obtain a desired growth rate. ch is rotatable by an engine through a driving shaft (20), and a transmission comprising a centrifugal coupling, a driving belt (8) and a driving wheel with a groove (7) for the driving belt fitting in said groove, which driving wheel comprises an outer (3) and an inner (4, 4') half of the driving wheel, wherein the outer half (3) of the driving wheel consists of an inner wall of a coupling drum (11) being part of the centrifugal coupling, which drum is rotated by the driving shaft when the centrifugal coupling is in an operative state, characterised in that a fan (14) is provided inside the driving belt in the axial direction, coaxially to the driving shaft, and arranged to rotate at least when the centrifugal coupling is in the operative state, which fan has fan blades (15) extending at least partly radially beyond said groove for the driving belt, which fan blades are designed to suck cooling air in the axial direction towards the space outside said groove for the driving belt and towards the drum of the centrifugal coupling. 2. A machine according to claim 1, characterised therein that the inner driving wheel half comprises an integrated, inner radial portion of the fan, while the fan blades (15) form outer, periphery portions of the driving wheel half. 3. A machine according to claim 2, characterised in that the two halves of the driving wheel are connected to each other and journalled on the driving shaft, which is rotatable also when the driving wheel and the fan do not rotate or rotate at a lower speed, when the centrifugal coupling is in a non-operative condition or slips. 4. A machine according to claim 3, characterised in that the two wheel halves are connected to each other by a sleeve (5), which is journalled on the driving wheel. 5. A machine according to claim 1, characterised in that the fan (14') is a separate unit provided inside the inner driving wheel half, as viewed in the axial direction, between the inner driving wheel half and the engine, and which fan has fan blades (15') extending beyond the outer, circumferential edge (4a') of the inner driving wheel half (4'). 6. A machine according to claim 5, characterised in that the driving wheel is journalled on the driving shaft, which is rotatable when the driving wheel does not rotate or rotates at a lower speed, when the centrifugal coupling is in the non-operative state or slips, while the fan (14') being a separate unit is fixedly, i.e. not journalled, mounted on the driving shaft to rotate therewith also when the engine runs but the centrifugal coupling is not in the operative state or slips. 7. A machine according to claim 1, characterised in that the centrifugal coupling and the driving wheel are provided in a chamber (38) being defined by a portion (37) of a driving belt cover (30) outside the driving belt and the centrifugal coupling, and by a shield wall (31) extending around a portion of the centrifugal coupling and the driving wheel at least behind the centrifugal coupling and the driving wheel but being open for the driving belt in the forward direction, wherein the fan is arranged to drive at least a partial flow of the cooling air in said chamber and therefrom further forwards along the driving belt inside the driving belt cover. 8. A machine according to claim 7, characterised in that said shield also extends around a portion of the centrifugal coupling and the driving wheel on the bottom side of said elements. 9. A machine according to claim 7, characterised in that a portion (35) of said shield abuts a wall (36) being part of the engine. 10. A machine according to claim 1, characterised in that the driving belt is of the V-type, and that the groove for the driving belt in the driving wheel is wedge-shaped. , Petty, 123/044; US-3931809, 19760100, Corte et al., 123/043.R; US-3951112, 19760400, Hunter, 123/008.45; US-3957021, 19760500, Loyd, Jr., 123/008.11; US-4018191, 19770400, Lloyd, 123/008.45; US-4109618, 19780800, Daniels, 123/043.C; US-4134382, 19790100, Southard, 123/243; US-4235217, 19801100, Cox, 123/232; US-4353337, 19821000, Rosaen, 123/243; US-4401062, 19830800, Dean, 123/044.E; US-4413486, 19831100, Irwin, 060/039.63; US-4421073, 19831200, Arregui et al., 123/043.R; US-4530316, 19850700, Morrison, 123/044.R; US-4531481, 19850700, Haynes, 123/044.R; US-4561836, 19851200, Wankel, 418/183; US-4932850, 19900600, Valavaara, 418/171; US-5066207, 19911100, Valavaara, 418/171; US-5181490, 19930100, Ruzic, 123/243; US-5372107, 19941200, Smythe, 123/244; US-5399078, 19950300, Kuramasu, 418/061.2; US-5486223, 19960100, Carden, 075/244; US-5658138, 19970800, Round et al., 418/150; US-5720251, 19980200, Round et al., 123/246 s, such as introducing fluoroscopic cameras, instruments, and drug delivery. s for diverting excess air from the main drive gas turbine to the first and second channels. 5. A watercraft as recited in claim 2, wherein the watercraft includes a main drive motor, and the onboard air system includes an air blower powered by the main drive motor. 6. A watercraft as recited in claim 2, wherein the watercraft includes a jet engine main drive, and the onboard air system includes components for diverting exhaust from the jet engine main drive to the first and second channels. 7. A watercraft, comprising: at least one hull having a fore end, an aft end, and a longitudinal axis extending between the fore end and the aft end; a displacement body portion of the hull that extends between the fore end and the aft end, the displacement body having a static waterline, a port side, and a starboard side; a first channel-defining structure portion of the hull that is located on the port side of the displacement body, including a first wing structure extending laterally from the port side of the displacement body above the static waterline and a first outer skirt structure that extends downwardly from the first wing structure to below the static waterline in spaced apart relationship to the displacement body, said first outer skirt structure having an outer surface that is substantially perpendicular with respect to the static waterline and said first channel-defining structure defining a first channel with a cross-sectional surface that is generally arcuate; and a second channel-defining structure portion of the hull that is located on the starboard side of the displacement body, including a second wing structure extending laterally from the starboard side of the displacement body above the static waterline and a second outer skirt structure extending perpendicularly downwardly from the second wing structure to below the static waterline in spaced apart relationship to the displacement body, said second outer skirt structure having an outer surface that is substantially perpendicular with respect to the static waterline and said second channel-defining structure defining a second channel with a cross-sectional surface that is generally arcuate; the first and second channels extending from the fore end to the aft end and the first and second channels being adapted to capture a bow wave and to cause air and water to mix and spiral toward the aft end of the hull as compressed aerated water, thereby reducing friction drag, increasing lateral stability, and dampening transmission of bow wave energy at the aft end of the hull; wherein the watercraft includes an onboard air system that is adapted to function as means for injecting air into the first and second channels in order to enhance high speed operation of the watercraft. 8. A watercraft as recited in claim 7, wherein the onboard air system includes an air blower and an auxiliary power unit arranged to power the air blower. 9. A watercraft as recited in claim 7, wherein the watercraft includes a main drive gas turbine, and the onboard air system includes components for diverting excess air from the main drive gas turbine to the first and second channels. 10. A watercraft as recited in claim 7, wherein the watercraft includes a main drive motor, and the onboard air system includes an air blower powered by the main drive motor. 11. A watercraft as recited in claim 7, wherein the watercraft includes a jet engine main drive, and the onboard air system includes components for diverting exhaust from the jet engine main drive to the first and second channels. 12. A watercraft, comprising: at least one hull having a displacement body with a bow, a port side, and a starboard side; a first channel-defining structure portion of the hull that is located on the port side of the displacement body, including a first wing structure extending laterally from the port side of the displacement body above the static waterline and a first outer skirt structure extending perpendicu