Famous Patents
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 |
| 7137404 | Direct acting pressure reducing valve A direct acting pressure reducing valve includes a valve-inlet pressure introduction port; a valve-outlet pressure output port; a main valve for opening and closing a communicating conduit; a pilot pressure chamber formed with a flexible diaphragm member; a communic... | 11/21/2006 |
| 7044442 | Valve block for a control device, particularly for a hydrostatic machine The invention relates to a valve block (1) for a control device comprising a valve (9) whose valve piston (14) is subjected to the action of a control pressure when in its open position and to the action of a return spring (15) when in it... | 05/16/2006 |
| 7007713 | Pressure control apparatus The present invention provides a pressure control apparatus for controlling the pressure at an output port without reducing the effective sectional area by controlling a main valve through the switching operation of a small-sized directional control valve, wherein t... | 03/07/2006 |
| 6564826 | Flow regulator for water pump A flow regulator for a water pump, comprising a valve body, a piston block, a spring, a connecting pipe, and a rod. The valve body is roughly shaped like a cross, having a passageway in a vertical direction and a first tube and a second tube in a horizont... | 05/20/2003 |
| 6405722 | Single stage regulator and method for regulating compressed air therefor A single stage regulator is disclosed wherein a piston-type configuration is utilized to regulate an input working pressure as high as 4,500 PSI, to an output delivery pressure from 200 PSI to 1100 PSI. The single stage regulator can be used on paintball ... | 06/18/2002 |
| 6062245 | Gaseous fuel burner manifold with integral pressure regulator assembly An integral gas burner manifold and pressure regulator with an inlet fitting received through one wall of the manifold and threadedly engaging in the manifold a regulator body received through a second oppositely disposed wall of the manifold. The body ha... | 05/16/2000 |
| 5950671 | Over-pressure protection of a fluid sensor Apparatus for protecting a fluid sensor against excess fluid pressure that includes a manifold having an internal fluid passage and a fluid inlet for connecting the passage to a fluid system. A piston is disposed within the passage adjacent to one end of ... | 09/14/1999 |
| 4903726 | Medical vacuum regulating cartridge A vacuum regulating cartridge (10) having a roller diaphragm (52), a coil spring (54) and a cantilevered spring arm (68) to form a regulation system for regulating vacuum in a medical regulating vacuum controller (26).... | 02/27/1990 |
| 4516595 | Gas pressure reducing regulator and adapter A diaphragm type gas pressure reducing regulator and adapter in combination in which the adapter serves to isolate the diaphragm from the valve seat in the regulator in response to a spontaneous ignition. The adapter comprises a plunger which intercouples... | 05/14/1985 |
| 4276902 | Modular fluid pressure regulator valves A fluid pressure regulator valve has a rigid plastic composition valve housing having a coaxial aligned opposed inlet port and outlet port, and a hollow cylindrical interior having four stepped successively larger selected bore diameters on serially proce... | 07/07/1981 |
