Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 7007828 | Chemical metering pump A liquid chemical metering pump (24) is described that can be fully submerged within a hazardous liquid chemical transport/storage container (28). The pump (24) includes a discharge adaptor (30) that can be received in the outlet aperture... | 03/07/2006 |
| 4662336 | Fuel injection pump for self-igniting internal combustion engines A fuel injection pump has a stepped piston operatively disposed in a stepped bore so as to define a first pump work chamber and a second pump work chamber. A constant fuel injection quantity (hFE) is pumped to the second work chamber per pump p... | 05/05/1987 |
| 4657488 | Two stage stepped piston air compressor An air compressor with a cylinder (1) has a stepped piston (4) movably disposed therein which performs compression in both stroke directions to provide two-stage compression. Each compression stage is associated with at least one inlet and outlet valve (3... | 04/14/1987 |
| 4655183 | Distributor-type fuel injection pump having injection rate control function for internal combustion engines A distributor-type fuel injection pump for an internal combustion engine wherein the plunger has first and second portions with different diameters from each other, defining first and second pump working chambers, respectively. A communication passageway ... | 04/07/1987 |
| 4653986 | Hydraulically powered compressor and hydraulic control and power system therefor A hydraulically powered compressor has infinitely variable capacity control through use of a variable displacement hydraulic pump, and a hydraulic control and power system provides the infinitely variable capacity control with a proportionate change in re... | 03/31/1987 |
| 4343596 | Constant flow rate liquid supply pump An ink liquid supply system for an ink jet system printer comprising an ink liquid reservoir for containing ink liquid therein, and a constant flow rate pump for supplying the ink liquid to a nozzle. The constant flow rate pump comprises a first chamber f... | 08/10/1982 |
| 4338066 | Grease gun A grease gun is fed from a constant supply under pressure. The gun has a hand-pumped lever for delivering shots of grease either at high pressure and low volume or low pressure and high volume depending on a changeover valve. Air bleeds from the gun throu... | 07/06/1982 |
| 4334833 | Four-stage gas compressor A four-stage gas compressor including: a double-acting piston operable by pressurized oil and provided with first and second hollow opposed piston rods the first of which is connected to a first-stage piston and the second of which is connected to a secon... | 06/15/1982 |
| 4173432 | Vertical wave air compression device Means for capturing the vertical energy of waves and transferring this energy to air compression is disclosed. A compression shell chamber is affixed to the hull of a boat. Housed within the compression shell chamber is a float whose size is equivalent to... | 11/06/1979 |
| 4087209 | Displacement slurry pump Displacement slurry pump equipped with known piston-rod drive, in which on a piston rod expediently three pistons are arranged at a distance of at least one stroke length, they are a liquid piston moving the auxiliary liquid free of solid matter, and on b... | 05/02/1978 |
| 4046495 | Dispenser pump A fluid dispenser pump having a piston extending from one end of a cylinder with resilient means urging the piston from the cylinder to its extended position for manual movement into the cylinder to its retracted position, said piston and cylinder being e... | 09/06/1977 |
