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 |
| 7048254 | Low-leakage valve apparatus A low-leakage valve apparatus which reduces fugitive emissions from valves to the ambient atmosphere. A secondary packing chamber or gland is installed on an existing valve to intercept leakage past the valve's original primary packing gland, which otherwise would e... | 05/23/2006 |
| 6973938 | Liquid column pressure and vacuum vent A pressure and vacuum vent utilizing a column of liquid to open and close the vent at predetermined pressure and vacuum levels. A column of liquid is constrained in connection with internal and external passages coupled between a pair of expansion chambers. The exte... | 12/13/2005 |
| 6629621 | Gauge hatch with liquid seal A gauge hatch is provided that has a cover structure that incorporates a pallet/diaphragm combination and that is cooperatively associated with a pressure responsive liquid seal subassembly. The gauge hatch also incorporates a vent neck and a radially adj... | 10/07/2003 |
| 6375437 | Power operated air compressor assembly A portable power operated air compressor assembly comprises a portable frame structure and a power operated air compressor unit. The power operated air compressor unit is carried by the frame structure. The frame structure has structure constructed and ar... | 04/23/2002 |
| 6250331 | Zero crack-pressure, high-flow valve The present invention is directed to a zero crack-pressure, high-flow valve assembly especially suited for use with blood salvage or recovery systems. The valve assembly cooperates with a valve seat defining an opening for selectively providing fluid comm... | 06/26/2001 |
| 6056005 | Vent valve with liquid seal A vent valve is provided wherein a pallet/diaphragm type valve is cooperatively and coactively associated with a pressure responsive liquid seal. The assembly eliminates low level fugitive vapor emissions escaping from the diaphragm/seat region up to a pr... | 05/02/2000 |
| 5171025 | Sealing arrangement for a valve and more particularly one in the form of a multi-way valve A sealing arrangement for valve has at least one sealing ring, which has a substantially U-like cross section of its housing ring, which is made up of a plurality of parts which are permanently connected together. In the ring space of the housing ring a s... | 12/15/1992 |
| 5146896 | Mounting fuel injection system components on a fuel rail A fuel pressure regulator is disposed in a socket in a fuel rail and retained therein by means of a one-piece metal retention clip which has a flat forked blade portion that is inserted through a slot in the socket sidewall to span the socket in overlying... | 09/15/1992 |
| 4750705 | Magnetic quick action valve A quick action valve for use with fluid or vacuum lines has a permanent magnet assembly for urging the valve member onto the valve seat. The valve is normally opened and is so designed that after closing it may not reopen of its own accord whatever the la... | 06/14/1988 |
| 4144902 | Isolation valve A gas generator, for example a blast furnace, is isolated from an exhaust gas treatment system by means of an isolation valve characterized by a valve housing which may be permanently installed in the gas delivery conduit. The housing has a laterally offs... | 03/20/1979 |
| 3949907 | Storage bin with liquid sealed discharge opening Storage bin having a material discharge opening and a gate which is selectively openable to discharge material from the bin. A region surrounding the gated opening is selectively filled with a liquid to provide an airtight seal surrounding the closed disc... | 04/13/1976 |
