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Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 7836945 | Method for controlling a valve for an exhaust system An exhaust gas heat exchanger system of a combustion engine has a bypass duct and a heat exchanger duct with a heat exchanger. A valve is controlled by determining when heat is to be transferred from exhaust gas flowing through the exhaust system to the heat exchang... | 11/23/2010 |
| 7353865 | Method for controlling a valve for an exhaust system An exhaust gas heat exchanger system of a combustion engine has a bypass duct and a heat exchanger duct with a heat exchanger. A valve is controlled by determining when heat is to be transferred from exhaust gas flowing through the exhaust system to the heat exchang... | 04/08/2008 |
| 7318451 | Flapper valves with spring tabs A flapper valve assembly has a valve plate for attachment to a fluid device, such as a heat exchanger. The valve plate has a fluid port for permitting intermittent flow to or from a flow chamber in the fluid device. A resilient flapper covers the fluid port and has ... | 01/15/2008 |
| 7306030 | Snap-in baffle insert for fluid devices An insert snaps into position in a manifold of a fluid device to perform a baffling function. The insert includes a cradle having a base portion and opposed spring fingers for retaining the insert in position. The base portion can be completely closed to prevent flo... | 12/11/2007 |
| 7261151 | Suction line heat exchanger for COcooling system A heat exchanger including a suction line for gaseous or two phase refrigerant output from an evaporator and a capillary tube carrying cooled refrigerant to the evaporator. The suction line includes first and second substantially parallel straight cylindrical portio... | 08/28/2007 |
| 7255945 | Compact fuel cell system with efficient power generation performance A fuel cell system for supplying electricity to a main motor as a power source includes a fuel cell stack and pumps for supplying a fuel gas and an oxygen-containing gas to the fuel cell stack. The fuel cell system further includes a driving force transmitting mecha... | 08/14/2007 |
| 7222641 | Snap-in flapper valve assembly A flapper valve snaps into position in an inlet or outlet manifold of a heat exchanger to provide by-pass flow in cold flow or pressure spike conditions. The flapper valve includes a cradle having opposed spring fingers for retaining the valve in position. The cradl... | 05/29/2007 |
| 7216736 | Vibration suppression device of power train A heat exchanger, which performs heat exchanging between a lubricating oil circulating within a transfer device disposed behind an engine and an engine coolant, also functions as a mass member of a dynamic damper. The heat exchanger is disposed at an upper face of a... | 05/15/2007 |
| 7178345 | Stacked-plate gas-expansion cooler assembly, fabrication method, and use A gas-expansion cooler assembly has an expansion structure with an expansion orifice and an expansion reservoir in fluid-flow communication with an expansion-orifice outlet. A heat exchanger has a heat-exchanger inlet, and a heat-exchanger outlet in fluid-flow commu... | 02/20/2007 |
| 7147036 | Heat exchanger, a method for producing the same and a dehumidifier containing the same Two passages adjacent to each other via walls are formed spirally, and heat is exchanged between fluids passing through the passages via the walls. Upper and lower end faces of the spiral passages are covered with end plates, and the spiral passages and the end plat... | 12/12/2006 |
| 7059841 | Structure of an oil-free compressor on a vehicle An arrangement of an oil-free compressor apparatus on a rail vehicle for supplying compressed air to pneumatic units assigned to the rail vehicle. The arrangement includes an oil-free compressor and a cooler unit connected with the compressor. The arrangement also i... | 06/13/2006 |
| 7025119 | Heat exchanger, a method for producing the same and a dehumidifier containing the same Two passages adjacent to each other via walls are formed spirally, and heat is exchanged between fluids passing through the passages via the walls. Upper and lower end faces of the spiral passages are covered with end plates, and the spiral passages and the end plat... | 04/11/2006 |
| 6994102 | Pressure regulating valve A pressure regulating valve which is comprised of a valve body being comprised of a cylinder, a spool slidably disposed in the cylinder with a clearance, the spool and the cylinder defining a pressure chamber and a space portion, and an urging member which urges the... | 02/07/2006 |
| 6942027 | Exhaust-gas heat recovery appliance An exhaust-gas heat recovery appliance having a heat-exchanger line and a bypass line and a heat exchanger being arranged in the region of the heat-exchanger line. At least one valve device, for the purpose of influencing the mass flow of exhaust gas, is provided in... | 09/13/2005 |
| 6935417 | Solution heat exchanger for absorption refrigerating machine The present invention relates to a solution heat exchanger used for performing heat exchange between a dilute solution and a concentrated solution in a solution passage of an absorption refrigerating machine. The solution heat exchanger (H) comprises a plate type he... | 08/30/2005 |
| 6905792 | Cooling system and cooling process of fuel cell The present invention provides a cooling system of fuel cell, which solves the gas biting noise problem by trapping bubble in a coolant, gives protection to a stack (MEA) and the membrane of a humidifier by regulating the coolant pressure of fuel cell and improves t... | 06/14/2005 |
| 6167956 | Aftercooler having bypass passage integrally formed therewith An aftercooler for cooling a compressed fluid exiting from a compressor, the aftercooler including a radiator unit for receiving the compressed fluid exiting from the compressor and for cooling the compressed fluid, the radiator unit having an inlet for r... | 01/02/2001 |
| 6085834 | Air handling system An air handling system for heating, ventilating and air-conditioning systems to provide a variable air flow between an air treatment section and an air bypass section includes selectively sliding panels to vary the air flow between the air treatment secti... | 07/11/2000 |
| 5979548 | Heat exchanger having heat exchange tubes with angled heat-exchange performance-improving indentations Disclosed is a heat exchange tube having angled heat-exchange performance-improving indentations on the tube. These angled performance-improving indentations increase the amount of heat transferred to a heat exchange liquid flowing through the tubes witho... | 11/09/1999 |
| 5950589 | Disk-type oil cooler and method of making same An installation of a pressure control valve provided for cold start in disk-type oil coolers is disclosed. The valve is provided with a valve housing which can be fitted directly into a connection opening between an inlet chamber and a hollow space throug... | 09/14/1999 |
| 5927399 | Aftercooler with integral bypass line An aftercooler apparatus condenses vapor in untreated gas discharged from a compressor of a gas drying system. The apparatus includes a radiator, a bypass line and a bypass valve. The radiator features a first inlet, a second inlet and an outlet. The firs... | 07/27/1999 |
| 5890509 | Hydraulic temperature compensated cooler bypass control for an automatic transmission A cooler bypass valve, located in a hydraulic circuit between the discharge side of a torque converter and lubrication circuit, includes a valve spool urged by feedback pressure acting in opposition to the force of a compression spring to a bypass cooling... | 04/06/1999 |
| 5810071 | Heat exchanger A heat exchanger, in particular an oil cooler for internal combustion engines, composed of several parallel tubes (19) for the heat exchange medium and of lamellar, plate-like heat exchange elements (10) arranged perpendicular to the tubes and fixed there... | 09/22/1998 |
| 5794575 | Coolant circuit for motor vehicles The invention relates to a method of controlling the flow-rate distribution in the coolant circuit for motor vehicles and, further, to an apparatus for carrying out this method. A throttling member actuated by differential pressure converts the pressure d... | 08/18/1998 |
| 5787977 | Heat exchanger First and second communicating holes are formed in a first formed plate 11, and first and second communicating holes are also formed in a second formed plate 12. The first and second formed plates 11 and 12 are joined to each other to form a joined body 8... | 08/04/1998 |
| 5762134 | Hydraulic temperature compensated cooler bypass control for an automatic transmission A cooler bypass valve, located in a hydraulic circuit between the discharge side of a torque converter and lubrication circuit, includes a valve spool urged by feedback pressure acting in opposition to the force of a compression spring to a bypass cooling... | 06/09/1998 |
| 5566881 | Automotive hot-water Heating apparatus According to the present invention, a hot water type heating apparatus includes a heat exchanger and a flow quantity control valve which controls a quantity of hot water to the heat exchanger. The flow quantity control valve includes a valve housing provi... | 10/22/1996 |
| 5184773 | Pressure regulating heater control valve A pressure relief function is incorporated into a proportional solenoid controlled heater valve for an automobile heater. One of two internal valve seats is spring-biased against an internal shoulder and is exposed to pressure differential across it. When... | 02/09/1993 |
| 4878514 | Heater control valve with flexible deflector A heater control valve comprising: a valve body defining a chamber and a bypass passage extending therefrom. A first conduit in fluid communication with the bypass passage for defining a first inlet port and a first exit port adapted to communicate coolan... | 11/07/1989 |
| 4874010 | Heater control valve A heater control valve comprising: a valve body defining a chamber and a bypass passage extending therefrom. A first conduit in fluid communication with the bypass passage for defining a first inlet port and a first exit port adapted to communicate coolan... | 10/17/1989 |
| 4570849 | Fan drive, particularly for cooling installation of vehicles Disclosed is a fan drive, in particular one for cooling installations of rail vehicles. The fan drive comprises a hydraulic motor and a control valve which regulates a bypass as a function of temperature, thus affecting the flow of a pressure medium drivi... | 02/18/1986 |
| 4361170 | Butterfly bypass valve A passenger vehicle heater core fluid flow system and bypass valve (10) therefor is disclosed having a butterfly valve member (24) rotatably mounted in a primary fluid passageway (14) and intermediate first (20) and second (21) fluid ports which fluidly c... | 11/30/1982 |
| 4318367 | Energy recovery device An energy recovery device can be installed in the exhaust of heat producing equipment. The device includes a conduit having a main and bypass chamber. Also included are fluid conducting coils which are mounted within the main chamber for passing fluid the... | 03/09/1982 |
| 4265093 | Evaporator feed and control system An evaporator feed and control system maintains a relatively high level of stability over a wide range of varying loads. The evaporator system includes a first evaporator having a multiple pass inlet and a single pass outlet, and a second evaporator havin... | 05/05/1981 |
| 4061132 | Control valve means particularly adapted for swimming pool heater installations embodying a solar heater A five-way valve embodying a cylindrical body with valve seats and cooperating valve discs operable by a stem and having associated inlet and outlet ports. The stem is actuatable by pistons in the cylindrical body. The pistons are driven by pressure under... | 12/06/1977 |
