摘要:
A flexible leaflet heart valve (1), to replace natural aortic or pulmonary valves of the heart, includes a frame (3) and flexible leaflets (2) attached to the frame (3). Each flexible leaflet (2) forms part of a surface of revolution having its axis of revolution substantially orthogonal to the direction of blood flow through the valve (1). The valve (1) has improved opening characteristics under low flow conditions, and allows a large range of geometries for the same size valve.
摘要:
An aquarium filter is disclosed that provides an overflow window for indicating a blocked filter cartridge. The filter cartridge extends across the full width of the filter box and includes an overflow weir, or lip. The overflow weir forms part of the filter structure and controls the flow of water when the filter cartridge is blocked. Since the filter cartridge extends across the width of the filter box, the size of the filter for a given flow rate is reduced. The filter provides the feature of overflow indication in a more compact and efficient structure than otherwise possible.
摘要:
A tonometer is described for measuring the intra-ocular pressure of an eye in which a pulse of fluid is projected towards the cornea of the eye to distort the corneal surface by the pressure of the pulse, the distortion in the corneal surface being detected by a change in the reflection of light directed onto the cornea. A fluid delivery system (36, 44, 48) leads to an outlet through which the fluid pulse is applied to the cornea, and a branch (54) leads to a pressure measuring chamber (52), containing a transducer (170) which produces an electrical signal whose value depends on the pressure in the branch. A flow restrictor is removably fitted in the branch (54) and signal processing means (176, 178, 180) (the gain and rise time of which are adjustable by (182) or (186)), is supplied with the output from the transducer. Adjustment of 182, and 186 enable the electrical signal output of the processing means to be adjusted, for calibration. Calibration of the instrument is achieved by selecting an appropriately dimensioned restrictor and by adjusting the gain, and where appropriate the time constant, of the signal processing means, so that the plot of a pressure-time signal curve of the processing means output corresponds to the pressure-time curve for such an instrument when set to operate in line with a clinical standard.
摘要:
An assembly for maintaining flow between an inlet conduit and an outlet conduit. The assembly may include a first plate having an inlet notch sized to engage the inlet conduit and an outlet notch sized to engage the outlet conduit, and a second plate having an inlet notch sized to engage the inlet conduit and an outlet notch sized to engage the outlet conduit. The assembly may also include a first connecting member coupled to the first plate and the second plate, a bag having at least one glove port coupled to a second connecting member, and means for connecting the first connecting member to the second connecting member.
摘要:
An apparatus of exercise equipment with movable handle bars to simulate steering motion in a virtual environment and methods therefor are disclosed. One embodiment of the apparatus includes, exercise equipment having a display unit and a computing unit, a foot actuator mounted on a frame of the exercise equipment, a seat assembly coupled to a rail mounted on the frame of the exercise equipment, and/or a handle bar coupled to the seat assembly on one side. The handle bar can be programmable or reprogrammable to cause a leftwards steering motion or a rightwards steering motion to be simulated in the virtual environment in response to rotation in a given direction.
摘要:
One embodiment of the present invention discloses a cardio-fitness equipment with a seat that features height adjustment, proximity to handlebars adjustment, and easy removal of the seat for the purpose of exchange with a different user-selected model or for cleaning.
摘要:
A method and composition is disclosed for making conductive flow field separator plates having reduced resistivity, lower weight and lower cost. The plates are made by blending from about 0.5 wt % to about 40 wt %, preferably from about 1 wt % to about 30 wt %, most preferably from about 5 wt % to about 20 wt %, of the liquid crystal polymer; from about 0.5 wt % to about 40 wt %, preferably from about 1 wt % to about 30 wt %, most preferably from about 5 wt % to about 20 wt % of the poly(styrene-co-maleic anhydride); and from about 20 wt % to about 99 wt %, preferably from about 60 wt % to about 98 wt %, most preferably from about 70 wt % to about 90 wt % of the conductive filler. The blend is then moulded to form the conductive flow field separator plates.
摘要:
A novel class of Cylic Acetal biomaterials (CABs) based on a cyclic acetal unit is disclosed and claimed by Applicants. Two novel biomaterials suitable for use in a variety of biological applications including in the orthopedic field for joint and cartilage replacement and/or repair, and bone cement. The biomaterials are comprised of either a network of monomers of 5-ethyl-5-(hydroxymethyl)-β,β-dimethyl-1,3-dioxane-2-ethanol diacrylate (EHD) and a hydrogel comprised of EHD and poly(ethylene glycol) diacrylate (PEG-EHD).
摘要:
An electronic circuit connects to an airbag crash controller in a way which is functionally identical to an airbag squib. Based on a squib fire signal from the controller, the circuit provides an activation signal indicating airbag deployment and also allows communication with an airbag crash controller by creating an open circuit that is detected by the airbag crash controller as an airbag fault. Each functional part of the circuit includes an isolator to protect the airbag crash controller.
摘要:
A bioabsorbable sealant plug that expands in response to contact with moisture in a mammalian body is optimally positioned in a biopsy tract to seal the biopsy tract when a biopsy procedure is completed. In a first method, the leading end of the sealant plug is advanced through the lumen of a coaxial needle by a plunger until a leading end of a supporting leg abuts the patient's skin surface. A second method is performed with a pistol-shaped tool having a trigger that enables adjustment of the plunger. A third embodiment includes a plunger having a bifurcated end that grasps the plug. A fourth embodiment has a turning nut that causes compression of a gasket that clamps down on the plug. A supporting rod and coaxial needle are in parallel relation to one another in a fifth embodiment.