Patent application number | Description | Published |
20100323251 | HUMIDIFICATION CELL - A humidification cell of a fuel cell apparatus includes a first outer plate and a second outer plate. A gas chamber, a humidification chamber and a water-permeable membrane separating the two chambers, are disposed between the first outer plate and the second outer plate, starting from the first outer plate. A first water-permeable support element that prevents fibers from detaching and also prevents medium flows from blocking narrow gas outlets, is disposed between the first outer plate and the membrane in such a way that the first support element is made of a filter material. | 12-23-2010 |
20140077402 | HUMIDIFICATION CELL - A humidification cell of a fuel cell apparatus includes a first outer plate and a second outer plate. A gas chamber, a humidification water chamber, and a water-permeable membrane that separates the two chambers are disposed between the first outer plate and the second outer plate starting from the first outer plate. A first water-permeable support element is disposed between the first outer plate and the membrane. The first support element is made of a woven fabric formed of a plastic. A discharge and an entrainment of liquid water can be prevented during load changes or other non-stationary fuel cell operating states accompanied by a sudden change of gas volume flow in that the plastic is a fluoropolymer or a fluoroplastic. Advantageously, the fluoropolymer or fluoroplastic is formed at least partly, preferably entirely, of an alternating copolymer of ethylene and chlorotrifluorethylene (E-CTFE). | 03-20-2014 |
20140349207 | ELECTROCHEMICAL CELL - An electrochemical cell has at least one plate element which can be cooled by a liquid coolant, such as water. The plate element has a surface that can be wetted for the purpose of cooling with the coolant. The surface of the plate element in the electrochemical cell is configured such that a contact angle between the surface and the liquid coolant is less than 90°. In the method for producing the electrochemical cell an additional method step is carried out which influences the wettable surfaces of plate elements for cooling with coolant and by which a contact angle between the surface and the coolant is decreased. | 11-27-2014 |
20140374248 | METHOD FOR THE DRY PRODUCTION OF A MEMBRANE ELECTRODE UNIT, MEMBRANE ELECTRODE UNIT, AND ROLLER ARRANGEMENT - A method for the dry production of a membrane-electrode unit includes assembling a layered configuration including a centrally positioned membrane produced by extrusion and pre-dried at a temperature between 80° C. and 100° C. for 15 min to 30 min, a substrate-electrode unit on each side of the membrane having an electrode layer applied to a substrate, an optional frame around each substrate-electrode unit for fixing the substrate-electrode unit, and two separating films on outer sides. The configuration is pressed together between two laminating rollers so that a pressure connection is produced at least between the membrane and the electrode layers. A short production time is achieved because it is not necessary to keep the membrane moist at high temperatures under pressure. A membrane electrode unit and a roller configuration are also provided. | 12-25-2014 |
Patent application number | Description | Published |
20090161371 | Light emitter sub-assemblies especially containing an array of light emitting devices (LEDs) and modules containing such sub-assemblies which provide lighting apparatuses, especially light bars for mounting on a vehicle - A sub-assembly for a light-projecting module has an array of LEDs mounted on a circuit board potted in a tray at the bottom thereof by a solidified body of potting material. The body of potting material and the tray are heat-conductive and serve to dissipate heat generated by the LEDs. A light-emitting module includes the sub-assembly and a reflector. The reflector has a base which is assembled in heat-conductive relationship with the tray, so as to facilitate dissipation of heat generated by the LEDs. The reflector is a parabolic reflector which collects light from the LEDs and projects the light as a beam. The reflector contains an optical element for concentrating or diffusing the light projected from the module. The module may be assembled in a housing having an opening through which the light projects so as to provide a light bar suitable for mounting on the dash or windshield of a vehicle. A plurality of modules may be assembled around the edge of a frame which is contained in a cover of translucent material, whereby light, which may be of different colors depending upon the LEDs, is projected omni-directionally through the cover. | 06-25-2009 |
20090207612 | Light bar - A light bar has several modular light source heads which may contain different types of light sources as well as different technologies mounted in cages by shock absorbing grommets. The cages are mounted on a bottom member so that the heads can be arranged along opposite sides and the ends of the bottom members. The heads are captured, and assembled with the bottom member, by a top member which also captures translucent or transparent members or lenses along the sides of the light bar and, transparent or translucent end caps which may also provide lenses for the light source heads at the ends of the bar. The end caps are removably connected to the top and bottom members at the ends of the bar by screws extending through the end caps. The light source modules have the same wiring connected thereto by connectors from a connector board to connectors along the back ends of the light source heads. The top member is attached to posts extending from the bottom member by screws so as to enable removal of the top member to expose the light source modules. The modules at the end of the light bar are exposed upon removal of the end caps thereby permitting the light source modules to be installed, removed for servicing, and the interchange of different modular heads to obtain a desired compliment of light sources, which may be of different types and technologies, or may not be installed if desired to meet customers' orders. | 08-20-2009 |
20100189295 | Loudspeaker - A loudspeaker for projecting siren and other warning signals which is compact to facilitate installation in emergency vehicles, and which provides a horn projector in the compact space. The loudspeaker has a support in which an electrically driven driver unit is mounted. A chamber providing a plurality of cyclonic or spiral paths for sound from the speaker is located at one end of the support as by being connected to the support or being a part thereof. The support has a plurality of passageways for sound from each of the paths to exit ports at an end of the support opposite to the end thereof attached to or having the chamber. The cyclonic paths and the passageways are of like length and taper so that the sound from the exit ports combined in reinforcing relationship and projects outwardly from the exit port end of the support. The support provides a recombiner for the sound propagating along the cyclonic paths and passageways to provide the effect of a long horn in the compact space. | 07-29-2010 |
20110058370 | LED beacon - An LED beacon has a plurality of LED's mounted on opposite sides of a square post in the same horizontal plane. Each LED projects the light there from through an optical system. The optical system is provided by a collimating lens, preferably a cylindrical fresnel lens and a condensing, coupling lens for each LED also mounted on the post. The optical system provides enhanced illumination distributed in a cylindrical beam emanating from the fresnel collimating lens. The illumination is enhanced in that the condensing lens shifts the focus of the collimating lens to the location of the LEDs. Nominally, the fresnel collimating lens is focused at the center of the array of LEDs (the middle of the post). The condensing lens shifts the focus radially outward to the light emitting area of the LED, and the condensing lens captures the light from the LEDs and distributes the light uniformly on the fresnel collimating lens, thus efficiently utilizing the LED light and providing an intense beacon suitable for use as a warning light on vehicles and stationary applications. The coupling lens constitutes adapter optics which may be used in other warning light applications to condense and redirect focus of LEDs, such as for example, where the cylindrical fresnel lens is replaced by a rotating or stationary reflector to form an LED beam beacon. | 03-10-2011 |
20120182730 | LED BEACON - An LED beacon has a plurality of LEDs for emitting light of the same or different colors mounting along an upright member within an optical system. To provide a beacon illuminating selectively in one or more colors, the plurality of LEDs are in different groups of two or more LEDs, at least one LED in each group being of a different color. Each group of LEDs are mounted together circumferentially spaced from each other around a central axis. Each of the LEDs when activated projects light there from through the optical system provided by a collimating lens and a condensing, coupling lens. The optical system provides enhanced illumination distributed in a cylindrical beam emanating from the collimating lens. By selectively activating LEDs of the same colors or different color at different times different sequences or patterns may be generated. | 07-19-2012 |
20140293637 | SYSTEM FOR MOUNTING A LAMP WITH RESPECT TO A SURFACE OF A VEHICLE - A system is provided for mounting a lamp having a plurality of different types of mounting members. One of the mounting members is a rigid tray mountable by fasteners flush upon a surface of a vehicle to enable an on-surface mounting mode, and other of said mounting members, such as a grommet or bracket, are mountable at least partially in an opening or hole when present along such surface of a vehicle to enable an inset mounting mode. The different mounting members each engage a common shape housing of the lamp, such as round or oval, so that by selection of one of the mounting members, on-surface or inset mounting of the lamp can readily be achieved. One or more common engagement features are provided along the housing to facilitate engagement of the housing of the lamp by mounting members in on-surface and inset mounting modes. | 10-02-2014 |
20150049482 | OPTICAL SYSTEM UTILIZING LED ILLUMINATION FOR A LIGHT BAR, AND LIGHT BAR HAVING SAME - An optical system is provided having a first optical element for directing LED light received outwards, and two second optical elements each disposed to receive a portion of the light from a different one of two opposing ends of the first optical element so that the second optical elements redirects such portion of the light received outwards. Light from the optical system is preferably collimated along a first dimension, and non-collimated along a second dimension perpendicular to the first dimension. The first optical element and second optical elements are disposed in an integrated structure to facilitate mounting of the optical system upon a circuit board having LEDs which provide light to the first optical element. A light bar is also provided having multiple sets of LEDs on circuit boards, where each set provides light to a different one of the optical systems. | 02-19-2015 |