Did You Know...
...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 8181969 | Lubrication blocking seal A lubrication blocking seal includes a hollow body that has upper and lower planar surfaces, a surrounding wall, a reservoir area and an open top. The body has upper and lower seal-receiving recesses located in the upper and lower planar surfaces, and a lower centra... | 05/22/2012 |
| 7637508 | High temperature high pressure seal stack having run-dry capability A long life high pressure seal stack provides a reliable and efficient seal between a plunger and housing of a plunger type pump. The seal stack includes a high pressure sealing element and a low pressure sealing element, both of which provide a sealing extension wh... | 12/29/2009 |
| 7422421 | Plunger pump apparatus A reservoir chamber 33, which communicates with a vent passage 34 provided in an electric motor 11, is formed between a motor casing 20 of the electric motor 11 and a body 13 in which a drain port 59A, which communica... | 09/09/2008 |
| 6932351 | Packing case for cooling compressors and other machinery A packing case for cooling compressors and other machinery is disclosed. A packing case includes an opening through which a movable machinery shaft may be inserted such that the packing case is mounted on the shaft. In an exemplary embodiment, the packing case conta... | 08/23/2005 |
| 6430842 | Assembly for supporting a rotating structure The present invention provides an improved assembly for rotating and sealing a centrifugal dryer and a dryer including such a sealing assembly. A seal according to the present invention includes an end cap supporting a bearing that in turn rotationally su... | 08/13/2002 |
| 6394461 | Pressure compensated stuffing box for reciprocating pumping units A packing arrangement for a reciprocating pumps, particularly oil well pumps, in which a stuffing box housing contains a pressure chamber, packing seals mounted within the pressure chamber, a pump rod extending through the housing and the packing seals wi... | 05/28/2002 |
| 6389955 | Pump assembly for a slip-controlled hydraulic brake system for a vehicle A pump assembly having a piston pump, which is driven by an eccentric element. To prevent leakage brake fluid from reaching an eccentric element chamber, a groove surrounds the pump piston in the pump housing and a seal and a porous metal sintered ring is... | 05/21/2002 |
| 6129336 | Ball stem seal A stem seal assembly comprises a stem having a top end and a bottom end. The stem is adapted to fit in a valve body and interface with the valving member. A ball segment integral to the stem has a top surface facing upwardly and a bottom surface facing do... | 10/10/2000 |
| 5873575 | Fluid cooled packing case member for compressors and other machinery A packing case member or packing cup for use in a package of other similar cups for mounting on a reciprocally or rotatably movable machinery shaft to prevent gas leakage along the shaft is disclosed. The member includes a circular central opening for the... | 02/23/1999 |
| 5791655 | Method for controlling oil in a press A dynamic oil control mechanism for a press including a vacuum inducing ejector or jet-pump to vacuum oil leaking from about an oil seal. The oil seal is located around the drive piston on the press slide to prevent oil migration from the press crown to t... | 08/11/1998 |
| 5263682 | Valve stem packing system A packing system for the operating stem of rotary valves includes first and second packing assemblies engaged with the stem at axially spaced locations. The first assembly is adjustably compressed into sealing engagement with the stem by a first packing n... | 11/23/1993 |
| 5135238 | Lubricated pump packing assembly A lubricated packing assembly for a reciprocating pump. The packing assembly includes a packing ring for sealingly engaging the pump plunger. A seal carrier is disposed adjacent to the packing ring. A vent zone is defined between the packing ring and a ve... | 08/04/1992 |
| 5107970 | High pressure sealing system and method A sealing system for a hydraulic actuator is disclosed which is operable to selectively change the frictional sealing force exerted on a piston rod in response to the fluid pressure acting on the sealing system. The sealing system includes a leakage chamb... | 04/28/1992 |
| 5056757 | Packing containment for live loaded fugitive emission seals A fluid valve for use in high pressure and high temperature operating conditions where the operating fluid is chemically reactive. V-type PTFE packing members are backed up with anti-extrusion wiper rings of silica filled PTFE or barium sulfate filled PTF... | 10/15/1991 |
| 5030150 | Splash guard assembly An assembly for the collection and channeling of water leaking beyond a stuffing box or other seal assembly which is normally provided to isolate a rotating propeller shaft in a marine craft from the water in which the craft rides. A receiving chamber is ... | 07/09/1991 |
| 4945724 | Apparatus for collecting hydraulic leakage fluid Hydraulic fluid leakage collection apparatus that includes an annular collection chamber that is carried in a cylindrical member within which a piston member is movable. A seal and wiper are carried by the clamp cylinder of an injection molding machine to... | 08/07/1990 |
| 4737087 | Drive shaft seal for gear pump and method A seal for the drive shaft of a gear pump for polymeric materials dissolved in a fluid solvent is disclosed, and which is adapted to prevent the polymeric material from leaking and hardening on the drive shaft. The seal includes a pair of axially spaced a... | 04/12/1988 |
| 4444220 | High pressure valve An erosion resistant control valve or adjustable choke has a body with a side inlet, an end outlet and a conical valve seat in alignment with the outlet. Downstream from the valve seat are a converging passage having a smaller taper than the valve seat, a... | 04/24/1984 |
| 4398727 | Pressure balancing stuffing gland for shafts A stuffing gland for shafts subject to relatively high pressures acting thereon in one longitudinal direction and comprising a flange disposed around the outer periphery of the shaft and having one side thereof open to the high pressure acting on the shaf... | 08/16/1983 |
| 4295653 | Pressure-compensated diaphragm seals for actuators, with self-equalization The invention has especial utility for providing completely safe hermetic sealing of actuators extending into highly sensitive or isolative process equipment, such as that using atomic radiation. The invention uses a general principle taught by the invent... | 10/20/1981 |
| 4222575 | Shaft seal device A shaft sealing device using seal rings having a hook shaped portion defining an inner radial lip to engage and seal the shaft. The rings are positioned symmetrically with respect to a spacer to define a sealing liquid chamber between the shaft, the space... | 09/16/1980 |
| 4146237 | Sealing device for Stirling engine piston rod in which no separation of oil and gas is necessary In Stirling engines the high pressure of the cycle requires special seals on the piston rod to prevent leakage of gas out of the high pressure cylinder into lower pressure regions such as a crankcase. A liquid oil seal is developed in a chamber around the... | 03/27/1979 |
| 4135859 | Pollution control device adapted for attachment to reservoir gland stuffing boxes An oil reservoir gland stuffing box employed to extend the service life of the packing by providing an oil reservoir to maintain essential lubrication is provided with an attached container which will receive the overflow of the oil reservoir should the p... | 01/23/1979 |
| 4093239 | Piston rod sealing arrangement for a stirling engine A sealing arrangement for the light working gases of a Stirling engine comprises, surrounding the piston rod below the cylinder chamber, a block seal portion and a liquid seal portion, the latter including an oil scraping middle unit, a liquid chamber, an... | 06/06/1978 |
| 4083566 | Seal for piston rod of Stirling engine A Stirling cycle hot gas engine is provided with a seal about a moving piston rod for limiting leakage of gas from a high pressure working chamber into a low pressure crank casing. The seal is a conically shaped plastic ring urged against the piston rod b... | 04/11/1978 |
| 3947157 | Single cylinder pump A reciprocating pump fabricated from an assembly including a body having a cylinder bore formed therein for receiving a reciprocating plunger, and with a transverse bore extending radially outwardly from the cylinder bore at a certain axial position, and ... | 03/30/1976 |
| 3940151 | Glands A gland seal arrangement for effecting a fluid seal between two relatively movable parts wherein the loading applied to an annular sealing member in contact with such parts is derived from a coaxially arranged, sleeve-like thrust member sensitive to the p... | 02/24/1976 |
