1
Metin Colpan, Joachim Schorr, Ralf Herrmann, Petra Feuser: Chromatographic purification and separation process for mixtures of nucleic acids. Qiagen, Jacobson Holman PLLC, May 7, 2002: US06383393 (47 worldwide citation)

A method for the purification and separation of nucleic acid mixtures by chromatography including adsorbing the nucleic acids to be separated and purified from a solution with a high concentration of salts (ionic strength) and/or a high concentration of alcohol on a substrate and subsequent desorbin ...


2
Thomas Haubold, Ralf Herrmann: Resistance heater. Mann & Hummel, Crowell & Moring, December 4, 2007: US07305178 (2 worldwide citation)

A resistance heater 10 for a liquid system, in particular a fuel system of a diesel engine, in which a heating element 13 is connected to at least two contact rods 12a, 12b. Terminals are provided on the contact rods 12a, 12b so that they can receive an electric voltage. In addition, a sensor 24 is ...


3
Karl Ernst Hummel, Ralf Herrmann: Internal combustion engine with a system for secondary air charging and method for operation of the internal combustion engine. Mann Hummel, January 3, 2012: US08087244 (1 worldwide citation)

An internal combustion engine with a system for secondary air charging has a combustion unit, an intake air conduit connected to the combustion unit, and an exhaust gas conduit connected to the combustion unit. A throttle is arranged in the intake air conduit. A turbo-engine is connected to the inta ...


4
Ralf Herrmann: Solenoid valve. Robert Bosch, Michael Best & Friedrich, October 11, 2016: US09464728

The invention relates to a solenoid valve (100), which has a valve rod (141), an electromagnetic actuation device (131, 135, 139) for deflecting the valve rod (141) starting from a first switching position into a second switching position, and a support device (110, 210, 310, 410) for supporting the ...


5
Ralf Herrmann, Michael Joist, Heinz Kempf, Adam Pawlowski, Liane Rheinschmitt: Sub-rack with housing for receiving plug-in modules. Schroff, IP Section, Gardere Wynne Sewell, November 8, 2007: US20070256957-A1

A sub-rack (1) for plugging and unplugging electronic plug-in modules (3) includes a housing (2) which has a front cover plate (5). Each plug-in module includes a cooling device including a heat sink (19). A liquid distributor (12) is mounted on the cover plate and in flow connection with each of th ...


6
Karl Ernst Hummel, Ralf Herrmann: Internal Combustion Engine with a System for Secondary Air Charging and Method for Operation of the Internal Combustion Engine. Mann Hummel, Gudrun E Huckett Draudt, September 4, 2008: US20080209888-A1

An internal combustion engine with a system for secondary air charging has a combustion unit, an intake air conduit connected to the combustion unit, and an exhaust gas conduit connected to the combustion unit. A throttle is arranged in the intake air conduit. A turbo-engine is connected to the inta ...


7
Ralf Herrmann, Helmuth Fischer: Liquid filter. MANN & HUMMEL, Crowell & Moring, April 6, 2006: US20060070956-A1

A liquid filter, particularly for filtering diesel fuel, having a device for automatically discharging water separated from the fuel in the liquid filter, including a housing with an inlet and an outlet for the liquid to be filtered, a filter element arranged in a sealed manner between the inlet and ...


8
Thomas Haubold, Ralf Herrmann: Resistance heater. Mann & Hummel, Crowell & Moring, May 11, 2006: US20060098964-A1

A resistance heater 10 for a liquid system, in particular a fuel system of a diesel engine, in which a heating element 13 is connected to at least two contact rods 12a, 12b. Terminals are provided on the contact rods 12a, 12b so that they can receive an electric voltage. In addition, a sensor 24 is ...


9
Ralf Herrmann, Paul Joern: Fuselage of an aircraft or spacecraft and corresponding aircraft or spacecraft. Airbus Deutschland, Jenkins Wilson Taylor & Hunt P A, January 13, 2011: US20110006159-A1

The invention relates to a fuselage of an air- or spacecraft. The fuselage comprises at least one shell element and one insulation element. The insulation element is configured as a passive, watertight insulation element and can be mounted on an inner side of the at least one shell element in a comp ...


10
Michael Kolax, Wolf Dietrich Dolzinski, Hans Peter Wentzel, Ralf Herrmann: Fuselage of an aircraft or spacecraft of crp/metal hybrid construction with a metal framework. Airbus Deutschland, Greer Burns & Crain, April 15, 2010: US20100090061-A1

The present invention provides an inherently rigid fuselage of an aircraft or spacecraft comprising shell elements or fuselage barrels of CRP construction, wherein the shell elements or fuselage barrels each have an outer skin and an inner skin, which each at least partially or completely consist of ...