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 |
| 6598850 | Butterfly valve locking apparatus A locking device for a butterfly type valve is provided with an actuating shaft extending through a bore provided in a conduit in which the valve is located; the inner end of the shaft carries a locking arm that is movable upon rotation of the shaft betwe... | 07/29/2003 |
| 6543747 | Valve actuator apparatus A valve actuator includes two parallel tracks in each of which a slider block is disposed to slide with a pivot pin and nut carried between the slider blocks; a valve stem engaging member is provided with an arm terminating in a sleeve in which a pin havi... | 04/08/2003 |
| 5538029 | Method for adjusting valve sealing engagement A method for adjusting sealing engagement of a valve seat includes providing a valve with a disk in a flow passageway and a valve seal with a seat positioned for sealing engagement with the disk, the valve body and seal together defining a channel having ... | 07/23/1996 |
| 5069240 | Flexible seating structure for rotary valves A flexible seating apparatus is disclosed for use in rotary valves comprising a flexible seat ring attached to one of the valve body and valve closure member in a cantilevered fashion and maintained thereagainst by a resilient member, the latter being hel... | 12/03/1991 |
| 3958314 | Seal for butterfly valves A new and improved butterfly valve, and particularly, an inexpensive seal therefor. A valve body having a fluid passage is provided with a flexible valve seat about the periphery of the passage, while a butterfly valve disc is journalled within the passag... | 05/25/1976 |
| 3934850 | Adjustable valve seat A valve, such as a butterfly valve, having an adjustable valve seat. The valve includes a valve body having an interior passage and a valve member journalled in the body for movement between positions opening and closing the passage. The body further incl... | 01/27/1976 |
