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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 7413037 | Metal face seal for an earth-boring bit A metal face seal for an earth boring drill bit where the drill bit has a bit body, at least one bit leg, a bearing pin on each bit leg, and a cone rotatably mounted on each bearing pin. The metal face seal is located in the cavity formed between the interior surfac... | 08/19/2008 |
| 7370864 | Balanced mechanical seal assembly A mechanical seal for providing a fluid-tight seal between a rotating shaft and a stationary housing comprises a first pair of seal members for sealing and separating a process fluid from a barrier fluid and a shuttle. The first pair of seal members comprises a firs... | 05/13/2008 |
| 7367739 | Two component seal A pair of pivoting parts are held together with a pin, with a first part, such as a rod end of a hydraulic actuator, positioned between two flanges of a bracket, with the flanges having surfaces mating with sides surfaces of the rod end. A seal is placed in each of ... | 05/06/2008 |
| 7367783 | Rotating fluid machine A rotary valve for switching supply passages, and discharge passages of high-temperature and high-pressure steam for a rotor rotatably supported at a casing is constructed by making a fixed side valve plate and a movable side valve plate abut to each other on a slid... | 05/06/2008 |
| 7293778 | Systems and methods for sealing between stators and rotors A seal is used between a housing and a shaft having an axis. The seal includes a first portion and a second portion engageable with each other and movable relative to each other. The first portion and the second portion are configured to be received in a cavity betw... | 11/13/2007 |
| 7204490 | Shaft-sealing device having an inner modular structure for combining with a rotary machine A shaft-sealing device includes a shaft tube, a retaining ring member, a rotary ring member, a resilient ring member and a sealing ring member. The shaft tube provides with an annular end flange and engaging notches thereon. The rotary ring member also provides with... | 04/17/2007 |
| 7125019 | Single seal with resilient member The invention relates to a single seal, and more specifically to a seal for a rotary shaft extending through a wall, e.g. that of a pump housing. The single seal exhibits one single sealing location between a stationary and a rotating sealing ring. The seal is attac... | 10/24/2006 |
| 7029012 | Mechanical seal without elastomers A seal that provides sealing between a rotatable shaft and a housing has a stationary part for connection to the housing and a rotary part for rotation with the shaft. The rotary part includes a sleeve for mounting on the shaft. One end of the sleeve is provided wit... | 04/18/2006 |
| 6721381 | Seal arrangement for in-core instrument housing A seal arrangement for providing a seal between a nuclear reactor in-core instrument housing and an instrument contained within the housing includes a lower seal assembly surrounding an outer portion of the in-core instrument housing, an upper seal assembly surround... | 04/13/2004 |
| 6640823 | Fitting A fitting including a housing (2), a rotatable body (4) which is situated in the housing and which may advantageously be constructed in the form of a conical plug, a bushing (18) provided in the housing to floatingly mount and seal the rotatable body (4),... | 11/04/2003 |
| 6550778 | Axial face seal An axial face seal has a sliding ring and/or a counter-ring for use with an elastic roll body. The ring has a seal leg having a sliding surface, and a supporting portion with a conical circumferential surface outside of the sliding surface for accommodati... | 04/22/2003 |
| 6536774 | Mechanical seal, in particular for pumps A seal device for sealing between a wall (3) and a shaft (5), especially in a pump, comprising a stationary, preferably ceramic, seal element (13), which is connected to the wall, and a movably, preferably ceramic, seal element (14) which is connected to ... | 03/25/2003 |
| 6522708 | Seal arrangement for in-core instrument housing A seal arrangement for providing a seal between a nuclear reactor in-core instrument housing and an instrument contained within the housing includes a lower seal assembly surrounding an outer portion of the in-core instrument housing, an upper seal assemb... | 02/18/2003 |
| 6416057 | Brush seal A brush seal arrangement for sealing cooperation between a shaft and a surrounding member which is relatively rotatable with respect to the shaft. The brush seal includes an annular rotor disposed in surrounding relationship to the shaft and sealed with r... | 07/09/2002 |
| 6267382 | Fail safe L-shaped spring carrier for gas seals The present invention relates to a shaft seal (1) comprising a sealing element (14) mounted co-axially to a rotary sealing ring (10) to form a primary seal between opposed faces thereof to substantially prevent fluid flow across the primary seal. The seal... | 07/31/2001 |
| 6142476 | Mechanical seal A mechanical seal having two balance diameters and balance factors established separately and freely for two fluids which are opposed at a sealing face by providing two seal packings with a seal ring. A sidewall of a packing groove is removed on the seale... | 11/07/2000 |
| 6120034 | Secondary sealing assembly for mechanical face seal A mechanical seal for providing fluid sealing between a housing and a rotatable shaft includes a gland assembly, a secondary sealing assembly, and first and second seal rings each having a seal face. The secondary sealing assembly provides fluid sealing b... | 09/19/2000 |
| 6116611 | Tubular packing and method of producing same There is disclosed a tubular packing which can be easily produced, and has satisfactory durability while maintaining excellent properties of exfoliated graphite such as cushioning properties and heat-resistance. There are prepared a sheet of exfoliated gr... | 09/12/2000 |
| 6026917 | Earth-boring bit with improved bearing seal An earth-boring bit has a bit body and at least one bearing shaft depending inwardly and downwardly from the bit body. The bearing shaft has a base where it joins the bit body. At least one cutter is mounted for rotation on the bearing shaft and has radia... | 02/22/2000 |
| 5984313 | Sliding ring seal A sliding ring seal includes a counter ring and an adjusting ring configured as a buttress. The counter ring and the adjusting ring are interconnected in a manner that does not allow for relative rotation, and they enclose a shaft to be sealed, also in a ... | 11/16/1999 |
| 5826884 | Track joint sealing assembly for sealing a track joint having ceramic and elastomeric seal portions A track seal assembly adapted to seal a track joint includes a track link and a first ceramic seal member. The track seal further includes a first elastomeric member positioned between the track link and the first ceramic seal member. The track seal furth... | 10/27/1998 |
| 5544897 | Cartridge seal having a high contact pressure seal and means for intersleeve adjustment including quench fluid delivery An improved mechanical seal of the cartridge-type providing an inboard compressed packing seal between dual shaft sleeves and the pump shaft, compressed between the shaft sleeves by action of a plurality of radially arranged set screws. A sharp edge loade... | 08/13/1996 |
| 5341966 | Cellular wheel sluice for pressure vessels A cellular rotary sluice for discharging material from a pressure vessel including a cell housing rotatable about a vertical axis with top and bottom stationary sealing plates and rotatable inner and outer vertical edge members with the edge members provi... | 08/30/1994 |
| 5149249 | Shaft seal assembly, especially for high-pressure turbocompressors A turbocompressor shaft seal, especially for a high-pressure turbocompressor, has each of its gas-side and atmosphere-side slide rings biased toward a rotor ring of the shaft and associated with blocking-liquid compartments which are interconnected by an ... | 09/22/1992 |
| 5039114 | Collar nut and thrust ring A collar nut comprises a hollow cylinder having fine interior threads at one end for threadably engaging a pump mechanical seal assembly and an inwardly depending flange at the other end. The flange has an enlarged portion with a groove for receiving an O... | 08/13/1991 |
| 4462568 | Valve construction and method of making the same A valve construction and method of making the same are provided, the valve construction comprising a housing having a valve chamber therein, a valve member rotatably carried by the housing in the valve chamber thereof and having a valve stem extending fro... | 07/31/1984 |
| 4418921 | Mechanical seal A mechanical seal assembly comprising stationary rotating seal rings having opposed faces which remain parallel to one another during operation or defect to become convex in order to provide a convergent path for leakage across the opposed faces.... | 12/06/1983 |
| 4386785 | Shaft seals including a seal element and a drive ring assembly therefor A shaft seal including a sealing element and a drive ring assembly for mounting the sealing element with respect to a shaft, for rotation therewith; the drive ring assembly comprising a pair of concentric rings one mounted within the bore of the other, a ... | 06/07/1983 |
| 4175753 | Mechanical seal In mechanical seals adapted to perform in high temperature environments, fragile gaskets characterized by poor elasticity and conformability are used to perfect a seal between adjacent parts. Gaskets may be made of graphite, carbon, asbestos and/or fiberg... | 11/27/1979 |
| 4155559 | Deformable seal for rotary mechanism A floating annular sealing ring having a plastic coated surface is adapted to be received by an annular groove defined by a bushing and shaft sleeve mounted upon a rotating shaft to provide an effective liquid and gas seal. The encapsulated deformable ann... | 05/22/1979 |
| 4136974 | Seal and propeller drive assembly for industrial cleaning tanks An industrial cleaning machine that has a driven propeller means extending from a housing assembly for stirring liquid in the tank and an output shaft connected to the propeller means and carried by the housing assembly, the tank having an ear portion on ... | 01/30/1979 |
| 4114904 | Bellows-type mechanical seal A system for clamping a bellows assembly of a mechanical seal to its flange in the minimum radial and axial space which comprises the use of set screws, the threads of which are received in openings defined in part by a body flange and in part by a bellow... | 09/19/1978 |
| 4058321 | Oil seal construction for rotary mechanisms An oil seal construction for a rotary mechanism including a seal ring receivable in an annular groove in an end face of the rotor of said mechanism with the ring having a pair of radially-spaced annular surfaces for sealing engagement with the adjacent si... | 11/15/1977 |
