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 |
| 7278441 | Fluid controller A fluid control device 1 has an upper space S1 formed between and defined by the upper surface of a piston 10 and the lower surface of top wall 8a of an upper casing 8, and a lower space S2 formed between and defined ... | 10/09/2007 |
| 7059418 | Pressurized seal arrangement A pressurized sealing arrangement suited for providing a seal between a valve stem and a valve body is provided. The sealing arrangement includes a piston that is restrained in and statically sealed to the valve body and which surrounds the valve stem. Contained wit... | 06/13/2006 |
| 7004445 | Mechanical override for a valve actuator An apparatus and method for manual operation of an actuator is disclosed. A mechanical override includes a housing coupled to the actuator, a drive ring, and a shaft extending through a bore of the housing. The drive ring rotationally keys to the bore such that the ... | 02/28/2006 |
| 6843889 | Coke drum bottom throttling valve and system A coke drum bottom de-heading system having an internal shroud enclosure and a shroud end cap opened by a flange to a coke bottom de-heading valve capable of accepting the end of a gate valve upon actuation. Acting in coordination with the shroud enclosure to preven... | 01/18/2005 |
| 6488263 | Valve stem and method of manufacture; improved stem packing A valve stem has a thickness of hardfaced material on its outer diameter in the area contacting the stem packing where the seal is formed which prevents corrosion, erosion and/or scratching of the valve stem, thereby preventing formation of leak paths. A ... | 12/03/2002 |
| 6250604 | Valve stem and method of manufacturing, improved stem packing A valve stem has a thickness of hardfaced material on its outer diameter in the area contacting the stem packing where the seal is formed which prevents corrosion, erosion and/or scratching of the valve stem, thereby preventing formation of leak paths. A ... | 06/26/2001 |
| 6247679 | Valve stem and method of manufacture; improved stem packing A valve stem has a thickness of hardfaced material on its outer diameter in the area contacting the stem packing where the seal is formed which prevents corrosion, erosion and/or scratching of the valve stem, thereby preventing formation of leak paths. A ... | 06/19/2001 |
| 5464035 | Gate-type, side-ported, line blind valve A walled body, has apertures formed in front and rear walls thereof in which resilient seats are set. The latter sealingly engage a plate-type gate, centrally apertured for alignment with the seats, to define a portway through which to convey pipeline med... | 11/07/1995 |
| 5074526 | In-line fluid flow control valve with apparatus for and method of installation in an existing fluid conduit The present invention provides an in-line fluid flow control valve adapted and designed for installation in an existing fluid line carrying fluid under pressure, without the necessity of interrupting flow of fluid through such line, and further provides a... | 12/24/1991 |
| 4964432 | Method and means for mounting valve member on valve stem A method and means for removably connecting a valve member (62, 62A) on a valve stem (46, 46A) for movement between open and closed positions relative to a valve seat (24, 24A). The removable connection includes a split frustoconical connector (76, 76A) f... | 10/23/1990 |
| 4836238 | Unitary valve filter combustion A easily manufactured unitary valve and filter assembly of compact design allows replacement of the installed particulate filter without requiring difficult dissasembly. A cylindrical mesh filter is contained in a capped receptacle in the assembly and is ... | 06/06/1989 |
| 4765361 | Ported gate valve A gate valve formed with spaced parallel housing plates having axially aligned apertures which constitute a housing therebetween. Elastomeric sleeves line the apertures of the housing plates to provide an annular space between the sleeves. An elongated ga... | 08/23/1988 |
| 4729400 | Liquid control assembly A liquid control assembly for controlling the flow of a liquid into a reservoir. A float means for shutting off the flow of liquid when the reservoir is full is provided. Also, a means for independently shutting off the flow of liquid is provided so that ... | 03/08/1988 |
| 4709901 | Fluid power operated sliding gate valve system for tank trucks, pipelines, storage tanks and the like A remotely controllable fluid pressure actuated mechanism for controlling the actuation of a sliding gate valve or the like, for use with tank trucks, pipelines, storage tanks or the like, for helping to eliminate the possibility of hazardous spills. The ... | 12/01/1987 |
| 4610430 | Self cleaning valve for powdery, granular and pasty products The technical field of the invention is that of guillotine type valves for powdery, granular or pasty products. The technical problem posed consists in improving the valve disclosed in U.S. Pat. No. 4,356,838, so as to simplify the construction and mainte... | 09/09/1986 |
| 4543981 | Sliding gate valves In order to resist alteration of the spring forces utilized for applying seal pressure between the valve bodies in sliding gate valves for molten metal pouring, particularly those of the manually operated type, the valve support plate and the mounting pla... | 10/01/1985 |
| 4541453 | High temperature slide valve A slide valve for use in a high temperature gas line is described. The valve is constructed to allow field assembly and disassembly for ease of service, and has insulating means and gas purge means for maintaining the exterior of the valve housing at a lo... | 09/17/1985 |
| 4491145 | Toggle gate valve A toggle gate valve having a double block and bleed retractable sealing configuration which utilizes accurately positioned steel inserts as trim assembly guide plates to permit a significant reduction in valve body machining. The valve body as well as rem... | 01/01/1985 |
| 4456026 | Control device particularly useful as manual slide valve A manual slide valve comprises a housing having a valve slide slidable within the housing. The housing is constituted of two sections each including projections and recesses cooperable with each other and with the slide valve such that when the slide valv... | 06/26/1984 |
| 4408627 | Exhaust brake valve unit The invention provides an automatic exhaust brake valve unit having a hollow body with an exhaust gas passage extending therethrough and a valve closure member movable in the hollow body between a closed position in which it closes the passage, and an ope... | 10/11/1983 |
| 4316483 | Valve having wear-prone parts removable through bonnet area A valve is disclosed in which the wear-prone parts comprised of the valve, guides and valve seat are readily and easily removed through the bonnet area. The guides are maintained in position in the valve body by engagement with a stop and by securing the ... | 02/23/1982 |
| 3958592 | Safety shut-off valve Pressurized fluid is controlled by a reverse valve gate on a valve stem that extends through annular packing in a bore of a bonnet to a piston in an outer control chamber. Control fluid pressure moves the piston inward to open the valve against line press... | 05/25/1976 |
