Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 6966938 | Oil separator for pumps overflowing with oil An oil separator for oil-flooded rotary vane vacuum pumps has a filter housing (10) and a plurality of filter cartridges (14) disposed therein through which the pumping medium flows. The filter cartridges (14) are each inserted through a respect... | 11/22/2005 |
| 6596043 | Air/oil separator tank with permanent drain layer An air/oil separator tank (10, 60) has a separator element (12, 62) including coalescing media (14, 64). A separate downstream drain layer (22, 72) removes the separated coalesced oil and passes clean air. The separator element is removable from the tank ... | 07/22/2003 |
| 6331195 | Coanda water extractor A water extractor of an environmental control system includes a swirl section and a water collector downstream the swirl section. The water collector includes an upstream sump having an inlet positioned to capture the bulk of water droplets leaving the sw... | 12/18/2001 |
| 6096117 | Aerosol filter having filter layers of metal gauze In an aerosol filter having a number of coaxially disposed, approximately cylindrical filter areas, provision is made according to the invention for each filter area to have a metal gauze. Through the use of the metal gauze for the filter areas, the aeros... | 08/01/2000 |
| 6033462 | Multi-chambered air/oil separator An air/oil separator used with a closed loop oil seal system for a liquid ring vacuum pump, which incorporates a multi-chambered design for facilitating multiple stages of oil particulate separation is disclosed. The separator includes a cylindrical multi... | 03/07/2000 |
| 5669949 | Air filtration arrangement Constructions and methods are described for collecting particulate material from gas streams. In certain specifically described air filter arrangements, a first, rigid, filter construction is used in conjunction with a removable and replaceable depth medi... | 09/23/1997 |
| 4769050 | Liquid separator assembly A liquid separator assembly for separating a liquid from a liquid-entrained vapor is provided. The separator assembly includes a housing having an interior wall that is configured to define a containment chamber. A downstream pipe is provided that is coup... | 09/06/1988 |
| 4561867 | Apparatus for separating a liquid from a gas, particularly for turboengine bearing cases The gas-liquid separation device consists of two concentric pipes rotationally driven about their common longitudinal axis and between them defining first and second longitudinally extending channels. The mixture is passed into the first channels and the ... | 12/31/1985 |
| 4534861 | Vacuum pump purging apparatus An apparatus for removing liquid contaminants from the oil sump of a vacuum pump. A liquid separator mounted on the housing of the pump connects the interior of the pump housing to the atmosphere through a liquid trap. An inlet passage through the separat... | 08/13/1985 |
| 4124360 | Coalescing demister The specification discloses a novel Coalescing Demister having, depending on the direction of air flow, an inner or outer prefilter-precoalescer subassembly consisting of one or more layers of glass fiber cloth sandwiched between two screen-type retainers... | 11/07/1978 |
| 4053290 | Fiber bed separator This invention provides vertically disposed fiber bed elements and separators containing the same wherein "bubble re-entrainment" of a collected liquid phase in a gas stream flowing through the fiber bed is substantially eliminated or reduced. "Bubble re-... | 10/11/1977 |
