Did You Know...
...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 5735346 | Fluid level sensing for artificial lift control systems The artificial lift control system utilizes a piggy back line, flow computer, pressure transmitter, and software control to control artificial lift of wellbore fluids. The piggy back line is a medium to high pressure line strapped to the outside of the tu... | 04/07/1998 |
| 5676740 | Means for removing gas from a hydronic system A compact set of circular, wire-formed brushes, within a housing, provides the surfacing upon which, and in which, air bubbles can coalesce for subsequent venting thereof from the housing, and the housing has porting formed therein to accommodate a throug... | 10/14/1997 |
| 5649567 | Sealing arrangement, for use with, and in combination with, a steam and fuel oil control and furge valve, and a valve seat therefor A circular body, having a throughgoing orifice, an externally threaded periphery, and a pair of stepped recesses, defines a valve seat for a reciprocating piston. A retaining ring is made fast in one of the recesses, and a seal which contracts upon coolin... | 07/22/1997 |
| 5599171 | Rotary, self-priming, liquip pump, and an impellers and shaft assembly therefor, and a flexible-impeller pump assembly A pump housing has a plurality of chambers formed therein, and a shaft journaled within, the shaft having impellers keyed thereto. Each chamber has one of the impellers disposed therein. One of the impellers is the primary liquid-working element, and has ... | 02/04/1997 |
| 5567118 | Non-lubricated, air-actuated, pump-operating, shuttle valve arrangement, in a reciprocating pump A pilot spool is interposed between the compressed air supply and the diaphragm pump-operating main spool, to insure that, at any one time, only one end of the bore in which the main spool reciprocates receives the compressed air. The pilot spool has an a... | 10/22/1996 |
