摘要:
A method of producing a pump body having an inlet opening provided with an inlet valve (106) and an outlet opening provided with an outlet valve (108), said method comprising as a first step the step of structuring a respective first main surface of a first and of a second semiconductor disc (200) for defining a valve flap structure (202) of the inlet valve and a valve seat structure (204) of the outlet valve in the first disc and a valve flap structure of the outlet valve and a valve seat structure of the inlet valve in the second disc. Following this, a valve flap well structure (206; 216) and a valve opening well structure (208; 218) are formed in a predetermined relationship with the valve flap structures and the valve seat structures in a respective second main surface of the first and of the second semiconductor disc. The first main surfaces of said first and second semiconductor discs are connected in such a way that the respective valve flap structure is arranged in a predetermined relationship with a respective valve seat structure. Finally, the respective second main surface of said first and of said second semiconductor disc is etched at least in the area of the valve flap well structure and of the valve opening well structure so as to expose the valve flaps and open the valve seats.
摘要:
A micromembrane pump comprises a pump membrane which is adapted to be moved to a first and a second position with the aid of a drive means and a pump body connected to the pump membrane so as to define a pump chamber between these two components, the pump body being defined by two semiconductor plates having each formed therein a valve seat and a valve flap which are formed integrally with the respective semiconductor plate, the two semiconductor plates being connected in such a way that a respective passive non-return valve is defined by a valve seat of one semiconductor plate and by a valve flap of the other semiconductor plate, one of the passive non-return valves being arranged in an inlet opening penetrating both semiconductor plates, whereas the other of the non-return valves is arranged in an outlet opening penetrating both semiconductor plates. The pump membrane increases the volume of the pump chamber by a stroke volume when moving from the first to the second position and reduces the volume of the pump chamber by this stroke volume when moving from the second to the first position. According to the present invention, the ratio &egr; of the stroke volume to the volume of the pump chamber satisfies the following equation, when the pump membrane is at the first position: ϵ ≥ ( p 0 p 0 - &LeftBracketingBar; Δ p crit &RightBracketingBar; ) 1 γ - 1 wherein p0 is the atmospheric pressure, &Ggr; the adiabatic coefficient, and &Dgr;pcrit the maximum pressure value which depends on the valve geometry and on the wetting of the valves and which is required for opening the valves.
摘要:
A microvalve has a base element provided with a passage opening, a tappet, a suspension device for guiding the tappet, and a piezoelectric actuator for actuating the tappet. The suspension device guides the tappet relative to the base element in such a way that the passage opening can be closed or opened by the tappet. The longitudinal dimensions of the piezoelectric actuator can be changed by the application of an electric voltage. Longitudinally spaced ends of the piezoelectric actuator are connected to longitudinally spaced ends of the suspension device in such a way that the suspension device provides a way for mechanical translation between the actuator and the tappet. A change in the longitudinal dimensions of the piezoelectric actuator caused by the application of an electric voltage to the piezoelectric actuator is mechanically translated by the suspension device into a movement of the tappet essentially at right angles to the longitudinal direction so that the passage opening will be opened or closed. In addition, the suspension device is secured to the base element with the aid of a hinge-like element. At least two spaced points are used to secure the suspension device to the base element.
摘要:
Crystalline forms of (1r,4r)-6′-fluoro-N,N-dimethyl-4-phenyl-4′,9′-dihydro-3′H-spiro[cyclohexane-1,1′-pyrano[3,4,b]indol]-4-amine, pharmaceutical compositions and medicaments comprising these crystalline modifications, the use of these modifications as well as a process for the enrichment of such crystalline modifications.
摘要:
A card-shaped electronic data carrier, in particular chip card, has a card body (19) with a recess (21) located on a top side of the card (20), which accommodates a display (1). In a base surface (22) of the recess a reflection layer (23) is disposed. The recess (21) is formed in a multi-step fashion. The contact surfaces (6) of the display (1) are directed towards the base surface (22) of the recess (21) and rest against countercontact surfaces (26) on a step of the recess (21).
摘要:
The invention relates to a card-shaped data carrier (1) comprising a card body (2) provided with a graphical element (6) displayed thereon. The card body (2) is made of a plastic material for converting irradiated light into secondary light and for retransmitting the secondary light within the plastic material to the graphical element (6) or to a portion of the graphical element (6). The inventive card-shaped data carrier (1) is characterized in that the card body (2) is provided with a light source (18) for irradiating light into a shaped body (12) formed by the plastic material.
摘要:
Crystalline forms of (1r,4r)-6′-fluoro-N,N-dimethyl-4-phenyl-4′,9′-dihydro-3′H-spiro[cyclohexane-1,1′-pyrano[3,4,b]indol]-4-amine, pharmaceutical compositions and medicaments comprising these crystalline modifications, the use of these modifications as well as a process for the enrichment of such crystalline modifications.
摘要:
The invention relates to a card-shaped data carrier (1) comprising a card body (2) provided with a graphical element (6) displayed thereon. The card body (2) is made of a plastic material for converting irradiated light into secondary light and for retransmitting the secondary light within the plastic material to the graphical element (6) or to a portion of the graphical element (6). The inventive card-shaped data carrier (1) is characterized in that the card body (2) is provided with a light source (18) for irradiating light into a shaped body (12) formed by the plastic material.
摘要:
Disclosed are different processes for the determination of the internal pressure, particularly of the minimum pressure of the tire of a motor vehicle during driving operation, through an analysis of the characteristic vibration behavior of the wheel, whereby the standardized amplitude is determined from the vibration spectrum determined and the resonance frequency is observed.
摘要:
A card-shaped data carrier includes a card body provided with a graphical element displayed thereon. The card body is provided with a plastic material for converting irradiated light into secondary light and for retransmitting the secondary light within the plastic material to the graphical element or to a portion of the graphical element. The card-shaped data carrier has a shaped body which is made of the plastic material for displaying the graphical element and is at least partially arranged in at least one cavity of the card body and/or includes a laterally extended area inside which the shaped body exhibits optical properties different from the properties outside the area.