摘要:
Apparatus (10) comprising a patch-sized housing and an active mechanical assembly disposed within the housing, the active mechanical assembly including a mechanical pump and an actuation assembly for operation of the mechanical pump, the actuation assembly including a plurality of actuators, each capable of operating the pump independently of the other actuators so as to provide for redundancy in the event of failure of an actuator.
摘要:
A device of dispensing therapeutic fluid, the device comprising: a housing sized for attachment to the body of a patient; a reservoir for holding therapeutic fluid enclosed in the housing; a pump, downstream of the reservoir and capable of fluid communication with it, enclosed in the housing and; a dispensing assembly, downstream of the pump and capable of fluid communciation with it, the dispensing assembly having a sensor for repeatedly determining a parameter associated with the volume of therapeutic agent exiting the dispensing assembly of a function of the volume of therapeutic agent exiting the dispensing assembly.
摘要:
A liquid proportioning system controls the mixing of water and a fire retardant concentrate through the operation of a diaphragm operated valve. The diaphragm valve controls the flow rate of concentrate in response to the sensed pressure of water supplied to a proportioner, so that a predetermined proportion of concentrate and water is maintained.
摘要:
A fluid flow meter comprising a housing having a pair of fluid port and defining therebetween a fluid flow path (14); a flexible membrane (35) defining a pair of opposing faces and being mounted in the fluid flow path such that the pair of faces simultaneously define with the housing fluid impermeable seals at at least two different locations along the flow path, the membrane (35) being operative to flex so as to permit passage therepast of discrete quanta of fluid, each having a known volume, apparatus for generating electrical signals corresponding to flexure of the membrane (35); and monitoring apparatus for receiving the electrical signals and thereby determining a fluid flow rate along the flow path.
摘要:
A fluid flow meter comprising a housing having a pair of fluid port and defining therebetween a fluid flow path (14); a flexible membrane (35) defining a pair of opposing faces and being mounted in the fluid flow path such that the pair of faces simultaneously define with the housing fluid impermeable seals at at least two different locations along the flow path, the membrane (35) being operative to flex so as to permit passage therepast of discrete quanta of fluid, each having a known volume, apparatus for generating electrical signals corresponding to flexure of the membrane (35); and monitoring apparatus for receiving the electrical signals and thereby determining a fluid flow rate along the flow path.
摘要:
2.1 Derartige Schalter werden beispielsweise als Druckschalter für den Schmierölkreis benutzt, womit eine Messung geringer Durchsätze jedoch nicht möglich ist. 2.2 Der neue Schalter weist hierfür die Merkmale auf, daß die Membrane (2) auf der Arbeitskammerseite (3) einen Schließkörper (8) aufweist oder mit einem solchen verbunden ist, der mit einem Ventilsitz (7) einer Abführleitung (6) der Fluidleitung zusammenwirkt. 2.3 Der neue Schalter ist für die Messung geringster Durchflußmengen geeignet.
摘要:
2.1 Derartige Schalter werden beispielsweise als Druckschalter für den Schmierölkreis benutzt, womit eine Messung geringer Durchsätze jedoch nicht möglich ist. 2.2 Der neue Schalter weist hierfür die Merkmale auf, daß die Membrane (2) auf der Arbeitskammerseite (3) einen Schließkörper (8) aufweist oder mit einem solchen verbunden ist, der mit einem Ventilsitz (7) einer Abführleitung (6) der Fluidleitung zusammenwirkt. 2.3 Der neue Schalter ist für die Messung geringster Durchflußmengen geeignet.
摘要:
Fluid operable apparatus has diaphragms 12, 14 reciprocable by fluid in respective chambers 16, 18. Respective sets of valves 144A, B, E, F; 144C, D. G. H are operable in response to movements of the second and first diaphragms 14, 12, respectively, to effect changeovers of fluid flow paths to and from the chambers 16, 18, respectively. First and second detents 110, 116 which have respective curvilinear mutually engageable surfaces, are reciprocable by respective diaphragms 12, 14 along paths which intersect one another. The motions of the detents 110, 116 relative to each other are orbits each about the other whereby changeover of the flow paths of either chamber 16, 18 is prevented unless the diaphragm 12, 14 reaches the end of its stroke preceding that changeover. Stops are provided to determine the maximum strokes of the diaphragms 12, 14.
摘要:
A flowmeter comprising means (12) for conducting fluid the rate of flow of which is to be measured, flexure means (15) arranged to undulate in response to fluid flow, whereby a travelling wave is propagated along the flexure means, and means (23, 24) for detecting a parameter of the travelling wave which is a function of the rate of flow of the fluid. The parameter of the travelling wave may be the frequency or the velocity of propagation thereof, for example.