O-RING SEAL

In a knife gate valve, an elastomer O-ring is held in an annular groove in a face of a valve seat by cotter pins having their eyes embedded in the O-ring and their shanks extending through the valve seat and clinched over. The eyes are adhered to the O-ring by vulcanization of the O-ring.

A lip seal assembly establishing a sealed relationship between two spaced relatively movable members wherein one of the members has a pair of adjacent annular recesses of different effective diameters. An annular lip seal element of resilient material is disposed in one of the annular recesses, the element...     

A roll ring for sealing socket-type joints is provided with a circumferentially extending lip having an abutment surface which is positioned to lie in a plane extending through the circumferential axis of the roll ring. The abutment surface tightly engages the outer circumferential surface of the insertion...     

A seal suitable for use in a barrel-type rotary machine having an inner casing mounted within an outer casing to provide a chamber therebetween which is pressurized by exposing the chamber to high pressure fluids processed in the machine. One end of the chamber is substantially enclosed by a pressure...     

There are disclosed several embodiments of a well drilling tool which is adapted to be connected to the lower end of a drill string above the drill bit, and which comprises inner and outer members which are rotated with respect to one another by a motor between them.

A mechanical seal assembly for a rotating shaft passing into a pressure vessel and being axially adjustable is formed by a first seal face rotating with the shaft and engaging a fixed seal face. This latter face is supported in a housing which is axially adjusted with the shaft. The housing in turn passes...     

The disclosure relates to a contour transfer device which may be used to transfer contours such as those found on the bodies of automobiles so that a proper contour from one side may be transferred to an opposite side of the vehicle which has been damaged. The disclosure relating specifically to a pair...     

A rotary engine anti-spin oil seal arrangement has a wave spring with tabs that project from each side and face in opposite angular directions so that one tab on one spring side catches in a hole in the bottom of the oil seal groove in the engine's rotor and a tab on the other spring side catches in...     

An improved ported mechanism such as an engine, compressor or the like. The mechanism includes a housing defining a chamber and a liner is disposed within the housing and supported thereby to define the chamber walls. Coolant passages extend between the housing and the liner and a piston is movable within...     

An elastomeric sealing system for sealing between two metal plates in contact along a contact plane and simultaneously sealing between a bored opening through the plates perpendicular to the contact plane, and a cylindrical piston in the bored opening. The system provides a recess positioned at the contact...     

An improvement in a mechanical seal assembly for a slurry pump, or like shaft rotating in a housing subject to incursions of grit contaminants of the type having relatively rotating first and second seal elements in annular engagement defining the seal, the first of the seal elements comprising telescopically...     

An annular sealing ring comprises a U-cup having a pair of lips for forming a cavity therebetween and an elastomeric expander ring mounted within the cavity. Sealing edges on the lips are contacted by members to be sealed and are positioned on the outside of the lips at a vertical location at or below...     

A wall duct assembly is disclosed comprising a duct piece or unit having arranged on its outside diameter retaining grooves for sealing structures. The sealing structures can be adjusted through the aid of pressure rings to provide effective sealing of the duct unit in walls or like structures.

An air line connector for use on an automatic coupler having a combination seal in the form of an apertured seal holder containing annular grooves in a front and rear face with seal members therein and a locating seal member about the diametral periphery of the holder.

A seal assembly disposed on a central longitudinal axis thereof which comprises a pair of annular rigid seal members and a pair of elastomeric retaining members. Each of the annular rigid seal members has a first seal surface, an annular groove and a second seal surface in sequence from the top.

An annular seal is placed between the flanges of two pipes or conduits to seal against high pressure or vacuum. A flat inner ring has the inside diameter of the pipe and is formed on its outer edge with a truncated V groove. A flat outer ring has an inside diameter slightly greater than the outside diameter...     

Vacuum pump of reciprocating piston and cylinder type. Cylinder is stepped to have front large diameter portion and rear small diameter portion. Piston has enlarged head portion sliding in front portion of cylinder and rear portion sliding in rear portion of cylinder. Front end of cylinder is closed...     

A grease reservoir is provided for the wear surfaces between a cotton harvester picker bar and its journal support in the picker drum. The reservoir is formed by upper and lower resilient seals acting to retain grease within the wear area and prevent entry of contamination into the reservoir area. A...     

A piston for use in a hydraulic or other fluid operated device having sealing means intended to prevent the passage of working fluid between the piston and cylinder in which it moves consisting of the combination of at least one O ring or other sealing device arranged around the circumference of the...     

A fitting for establishing a sealed connection with a boss which fitting includes a concentric depression about the innermost portion of its boss engaging surface, which retains a backup ring of special cross-section by means of an inwardly facing circumferential surface therein, the ring, being constructed...     

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 annular seal may include a circular, an oval, a lobed,...     

A sealing member for sealing an axially movable face seal member to an associated component comprises an annular body of graphite or other predominantly carbon-containing material of U-shape or C-shape in cross-section formed around a supporting annular core.

A pressurized medium powered device has a motor of the external rotor type, both the stator and the rotor of the motor having registering channels which communicate with one another across an interstice. At least one annular groove is provided in at least one of the rotor and stator components of the...     

A releasable locking and sealing assembly for a cylindrical casing which fits over a body. The body includes a cylindrical portion about which an O-ring formed from a stiffly deformable, springy material is disposed. The casing is dimensioned to compress the O-ring as it is slid over the body, and includes...     

An electric penetration assembly for passing electrical conductors through the wall of a pressure vessel has at least one hermetically sealed electric feed-through conductor surrounded by an insulator. The insulator is symmetrical about an axis parallel with the conductors and is impervious with a pervious...     

The freezing chamber of a frozen or semi-frozen confection freezer has a mixing rotor having a shaft which extends through an opening in a wall. The seal between the shaft and wall comprises an elastomeric cup having a rim engaged with the wall about said opening. The cup has a hub engaged with the shaft...     

A high-pressure pump includes a housing accommodating a movable piston. The piston defines a chamber which is divided by means of a partition member into two spaces substantially insulated from each other. One space communicates with a working medium source and with a consumer via non-return valves....     

A mechanical seal assembly especially constructed for use in low temperature environments in which an elastomer, i.e., an O-ring made of natural or synthetic rubber, is used as a substitute for the generally accepted and more expensive lapped or other types of joints.

A multilayer seal comprising a stack of rings, some being made of elastomeric material and some being made of more rigid material, such as a metal. The elastomeric and rigid rings alternate in the axial direction of the stack, and the elastomeric rings are progressively thinner in the axial direction...     

A rotary seal for a swivel joint is provided which is capable of standing substantially high internal pressure without leakage. Such swivel joints are widely used, for example, to prevent external leakage of products down the drain line in floating roof tanks. Also the sealing surfaces utilized are corrosion...     

An end sealing member joined to the ends of a pipe for cooperation with a complementary end sealing member on another pipe to seal the joint formed when at least two such pipes are joined in end-to-end relationship. Each end sealing member has upstanding members extending into the surface of the pipe...     

A two part sleeve gasket is provided for sealing between a pipe and a hole receiving the pipe, such as a porthole in a manhole. The gasket includes a first annular element of resilient elastomeric material having a generally tubular body portion and an outwardly, reflexly curved flange radially spaced...     

A system for effecting a fluid tight seal between two surfaces where one of the surfaces has an annular recess for receiving an annular sealing element which typically is an elastomeric sealing element. The sealing element is compressed when disposed between the surfaces to be sealed and a supplemental...     

A sealing ring assembly is disclosed for use in sealing the annular gap between two concentric cylindrical members, one of the members having an annular groove and the other member having a surface opposed to the groove. Deformable seal material and a radially expansible-contractible non-deformable split...     

An injection device for use with a fluid transporting cannula and a female fitting for a liquid system. The cannula is surrounded by a first sleeve which in itself is surrounded by a second sleeve. The end portion of the second sleeve places within the female fitting. A first seal is formed about the...     

An axle assembly having an axle shaft rotatably mounted within a housing and operably connected to a driving device at one end thereof, the axle shaft having an annular head formed on its end opposite the driving device, fastening element to fasten the head to a hub, the hub being rotatably mounted on...     

A self-contained rotary mechanical seal is provided for mounting on a rotating shaft to form a seal between the shaft and structure on a housing through which the shaft extends. The seal includes an annular lug holder to be secured to the shaft as by set screws. A plurality of lugs extend from the lug...     

A self-aligning seal for minimizing, or entirely suppressing, the flow of a fluid in a direction generally longitudinally of a shaft subjected to axial motions and to tilting motions in any direction. The seal comprises a shaft, a bushing surrounding said shaft, a convoluted diaphragm having radially...     

A pneumatic actuator in which a piston and a cylinder define an annular gap therebetween axially connecting two portions of the cylinder cavity otherwise separated by the piston. When compressed air is admitted to one of the cavity portions, an O-ring in an annular groove of the cylinder wall is expanded...     

A sealing arrangement for a two member couple, includes a sealing ring which is interposed between the two members of the couple and having a face which engages one of the members and two axially spaced edges. An elastically resilient ring is interposed between the other member of the couple and the...     

A pair of blocks or shell members of an appliance or the like are mated with each other, and an O-ring is fitted in an O-ring groove provided in the mating end surface of one of the shell members along the entire circumference thereof. In addition, a narrow annular clearance space is provided in a mating...     

A groove particularly designed and constructed for receiving an O-ring sealing member therein, and particularly for use on the closure member of a check valve. The groove comprises an annular recess provided on one face of the closure member, and having a cross-sectional configuration generally similar...     

A mechanical seal assembly for sealing between a rotating shaft and a housing wall through which it passes with the mutually engageable rotating and stationary sealing surfaces being located in a radial plane with respect to the axis of the rotating shaft and said sealing surfaces being carried by sealing...     

A shaft seal incorporates a casing formed with a stepped bore both diameters of which are greater than the diameter of the shaft fitted to the bore. A bearing sleeve fitting the shaft is located in the smaller diameter portion of the bore. A seal-carrying ring held captive within the larger diameter...     

A multiple stage mechanical end face seal assembly which has been developed to improve seal reliability and performance during both steady-state and transient operation. The seal assembly features a rotating seal ring mounting system which utilizes a rigid support ring loaded thru narrow annular projections...     

Rotary sealing apparatus for sealing off between a relatively rotating shaft having an axis of rotation and mounting an impeller, and a relatively non-rotating wall through which the shaft extends, there being an annular seat on the wall, comprises: (a) a non-metallic seal ring extending about the shaft...     

A coupling assembly for mounting a heating element to an opening in an engine block. The coupling assembly includes a guide member which prevents a blow-out of the coupling assembly from the engine block opening when high pressure is exerted against the coupling assembly. The coupling assembly includes...     

An automatic wear compensating seal device is provided for forming a seal between first and second members. An elastic sealing member is positioned between the first and second members such as that the elastic force of the sealing member holds the sealing member against at least one of the first and...     

In a mechanical seal for the rotary shaft of a rotary machine wherein the pressure difference between the internal and external liquids acting on the mechanical seal changes from positive to negative, and vice versa, a ring and a seat ring are formed with mating seal faces which coact to seal between...     

A seal is provided for sealing first and second mating surfaces. The seal comprises a channel in the first surface with a first projection in the bottom of the channel projecting upward towards the first surface. A second projection projects from the second surface towards the first surface and the second...     

A seal apparatus is provided for sealing a fluid in a stationary housing apparatus having an orifice through which a rotatable shaft extends. A bearing member with an optically flat bearing surface rotates with the shaft inside the housing. A rotationally static bearing, also having an optically flat...     

A pressure-relief valve device, especially for use with hydraulic props, has a main hollow housing containing a guide piece with a through bore in which a cylindrical shank of a valve or piston member is received. The shank is slidable within the guide piece bore and is held, by a spring force applied...     

An improved seal (10) for use in a universal joint (11) having an elastic seal ring (23) compressed between a pair of right circularly cylindrical sleeves (24,25). The seal ring is bonded to the sleeves. The sleeves are adapted to have press-fitted relationship with association portions of the universal...     

A flexible, fluid-tight seal assembly for sealing the gap between a duct and a wall where the duct passes through an opening in the wall. The seal assembly includes an annular housing affixed to and centered on the opening in the wall. The housing includes a circular recess opening inwardly toward the...     

An elastomeric O-ring seal (10) for sealing between a housing (20) and a shaft (22). The seal (10) defines an inner sealing surface (12) and an outer sealing surface (14) having a generally uniform non-deformed radius of curvature in cross section. An upper protrusion (16) and a lower protrusion (18)...     

An improved valve system for obtaining access to a container of fluid. In a container of fluid, and particularly a keg for beer, a valve assembly receiving member or keg neck extends from the top of the container. A sealing mechanism is provided to secure the valve assembly in sealed relationship with...     

A self compensating seal apparatus is provided for forming a seal between two rotary members such as the body and cutting head of a rotary drill bit to seal the space between the members from an external environment. The seal apparatus comprises a first sealing device mounted in a first of the members...     

A pipe joint for joining a pair of adjacent pipe ends includes an improved gasket contruction. An annular radially outwardly extending flange is provided on the periphery of each pipe adjacent and spaced from the pipe end, a cylindrical coupling member is provided including at least one axial slit in...     

A continuous tube T is formed by spirally-winding an extruded thermoplastic ribbon R having mating edges which are joined together to form a spiral seam and having at least one reinforcing rib 3 which, when in its spiral wrapped form, projects radially out from the tube. At predetermined lengths, the...     

A self-damping bellows seal assembly for providing a seal between a rotatable shaft and a stationary member through which the shaft extends. The assembly includes a flexible bellows surrounding the shaft and secured at one end thereto. An annular face seal is fixed and sealed to the other end of the...     

An O-ring shaft seal is disclosed to isolate a lubricated bearing from an external environment as utilized in a typical sealed bearing rotary rock bit. The O-ring is confined within a pair of symmetrical and complementry V-shaped surfaces, each surface having a rounded vertex. A first V-shaped surface...     

A diaphragm actuator is operated by the pressure difference between a pressure chamber and a negative pressure chamber, and causes an operating shaft to slide through a wall portion of the negative pressure chamber. When the pressure in the negative pressure chamber is highly negative, ambient air leaks...     

The high-speed seal is a two-part metal-to-metal type seal that, in its initial application, acts as a conventional resilient O-ring. As the seal begins to operate, a separate O-ring, retained within a seal gland channel formed in the body of a primary metal seal, provides an initial seal. As the seal...     

This invention provides a pressure transmitting and sealing apparatus between a high or low pressure fluid line and a gauge monitoring the pressure of the fluid in the line. This apparatus transmits pressure fluctuations between the measured fluid and a dissimilar fluid in the standline line connected...     

A sealing assembly for oppositely disposed flanges having a sealing frame interposed therebetween, is proposed. The sealing frame has oppositely disposed grooves into each of which are affixed metal sealing elements and the oppositely disposed flanges have grooves into which are positioned O-rings that...     

A shaft seal is presented which combines the attributes of the low pressure ealing of an O-ring and the high pressure sealing of a carbon face seal. This invention provides a dynamic shaft seal with the advantage of a very reliable, positive elastomeric O-ring seal for low pressure sealing and the advantage...     

An exclusion seal for being removably mounted in a bearing mount is formed with an annular housing with an internal sealing means having a sealing ring is constructed to prevent a "blow-out" of the seal due to the high lubricant pressure. The annular housing has an annular ring wall and a radially extending...     

An improved end face seal assembly comprises a wall mounted seat assembly having an axial sealing end face and an abutting shaft mounted sealing head assembly having an axial sealing end face slidably engaged therewith to provide a primary dynamic seal. The seat assembly has a peripheral O-ring to provide...     

A resilient O-ring shaft seal for use in a rotary rock bit is described wherein the degree of squeeze imposed upon the O-ring seal is increased in one or more discrete steps, occurring as drilling conditions or bearing deterioration cause rising temperatures to be imposed on the seal. The squeeze is...     

A shaft seal has a pair of stationary, yet floating, seals which are biased into engagement with opposite sides of a mating ring carried on a rotating drive sleeve. The mating ring is maintained perpendicular to the axis of rotation and against a squaring surface of the drive sleeve. The location of...     

A coupling of two confronting hubs with a metal seal ring sealing between the confronting faces of the hubs and O-rings sealing between each hub and the metal seal ring together with a third environmental seal O-ring that seals against pressure in both directions to protect against environmental fluid...     

A valve for controlling the flow of fluids of a flammable nature and under high pressure, which includes a hollow body having a plug rotatably mounted within the body between the floating seats at inlet and outlet ports with a packing plate in the bonnet capable of maintaining a seal against loss of...     

A drill head having a drill head casing, a rotatable support member for a drill steel, a ring gear nonrotatably attached to the rotatable support member and a pinion gear driving the ring gear. A carrier for the pinion gear having a housing attached to the drill head casing and a pinion shaft rotatably...     

A mechanical face seal comprises a seat associated with one of a pair of relatively rotatable components and a seal face member associated with the other component and movable axially with respect thereto. Said seal face member has a sealing face which engages an opposed face of the seat to provide a...     

Novel rotary processors including sealing means to control leakage of pressure and/or material between processing passages which are maintained at significantly different pressure levels. The processors comprise a rotatable element carrying a plurality of annular channels and a stationary element providing...     

A sealing plug includes a plug and a housing the plug and the housing including co-operating means whereby they may be secured together, the plug including two circumferentially extending grooves within which O ring seals are located, and the housing including an aperture within which the plug is adapted...     

A shaft seal that is slidably mounted in a housing with essentially equal balanced forces acting on each radial side. Fluid from the high pressure side of the shaft is communicated to equal areas on the two sides by ducts and constrained to the design areas by "O" rings. The seal moves radially in response...     

A tool is provided for seating "O" rings in flanged pipe. An "O" ring positioning plate is held between two parallel facing plates. A flexible "O" ring support band is mounted in the tool and holds the "O" ring tightly against an arcuate cut in the lower surface of the "O" ring positioning plate. A support...     

A vane-type hydraulically powered rotary actuator having a shaft provided with a radially extending vane. The shaft is rotatably carried inside a generally cylindrical actuator chamber formed in the housing of the rotary actuator. The vane includes a pair of end walls which move adjacent the actuator...     

A large manually operated leak-proof corrosion-proof low-cost shut-off or stop valve for handling high pressure refrigerant liquids and/or gases comprises a valve body formed of two sheet metal hemispheres welded to the periphery of a circular metal valve plate having a fluid passage therethrough and...     

An improved fitting is disclosed for receiving and sealing an aerosol cannister. This fitting employs an annular sealing ring on the fitting to seal against one or more peripheral surfaces of the recess defined by the valve assembly of the aerosol cannister.

A seal for use in an underwater connector having first and second mating members each of which has a coacting mating surface with a plurality of fluid passageways for mating with the passageways of the other member. The seal is a resilient tubular member having threads on a portion of its outer diameter...     

A packing member comprising an annular body having a circular groove extending axially thereinto through an end wall to form inner and outer sealing lips utilizes a resilient circular member embedded in the annular body to exert a radially directed force to a wall surface of the groove to actuate one...     

An improved seal for a rotary drill bit includes a pair of ring seals comprised of dissimilar materials disposed axially, adjacently to one another intermediate a stationary journal and a rotating cutter to present multiple sealing interfaces so that one or more of the ring seals may rotate with respect...     

A universal pipe joint assembly which comprises a connector housing having a main cavity defined by an internal spherical concave wall of a connector housing body a pair of axially spaced split rings with their inclined external circumferential walls disposed in relatively slidable contact with the internal...     

A sealed rotary drill bit comprising at least one rotatably carried roller cutter (13) and provided with a seal between the cutter and a mounting head (22) for preventing lubricating medium from being discharged from the bearing (14, 15, 16, 17, 18) and impurities from entering the bearing. For purposes...     

A master cylinder includes a housing with a pair of pistons movable therein to develop fluid pressure in a pair of pressure chambers. One of the pistons carries a seal assembly in order to provide a fast-fill feature. The seal assembly engages a large diameter section during initial braking and separates...     

A novel seal means is positioned between two coupled mechanical parts rotating about a pin, the pin being connected to one part and rotating within a bushing connected to the other part with pin and bushing. The seal means comprises an elastic load ring of relatively soft material and a seal ring of...     

A side feed water swivel for a hollow drill string includes a spindle one end of which is adapted to fit a socket on a rotary table of a drill rig, and the other end, to connect to hollow drill rods, and, intermediate its ends, a receiving section having upper and lower smooth cylindrical bearing surfaces...     

A measurement coupling with two end connections and a check valve which opens and closes a through bore of the measurement coupling in a controlled manner. The measurement coupling being constructed in two portions both of metal. The two portions be detachably connected to one another in such a way that...     

A valve includes a body having a tapered protrusion on one end and a thin walled heel on the other end. A cap includes a shoulder about which the thin wall is flared to couple the cap to the body. A sleeve positioned on the body provides effective sealing between the body and a flow device.

A system for sealing a pool or spa fitting includes a wall having a frustoconical hole therethrough, the hole expanding towards the outer side of the wall. A conduit or inlet fitting is disposed in the hole and has an integrally formed enlarged end portion which abuts the inner surface of the wall. The...     

An annular fluid seal for pressurized fluid systems particularly for use with a coupling having interconnectable self-sealing male and female parts. The two-part seal is mounted within an annular gland recess within the male part and includes a relatively rigid primary annular body of synthetic plastic...     

A seal assembly (34) for a roller cutter drill bit (10). Seal assembly (34) has an elastomeric resilient O-ring 44 adjacent one sealing surface and a dynamic elastomeric O-ring (46) adjacent another sealing surface. A rigid carrier (52) is mounted between the O-rings (44, 46) which are unsecured to their...     

A seal arrangement is provided for preventing gas leakage along a reciprocating piston rod or other reciprocating member passing through a wall which separates a high pressure gas chmber and a low pressure gas chamber. Liquid lubricant is applied to the lower pressure side of a sealing gland surrounding...     

In a hydrostatic axial thrust bearing structure in which two bearing members are disposed for movement relative to one another, a central bearing cavity adapted to receive pressurized bearing fluid is surrounded by a limited leakage seal structure which includes a ring of an elastomeric material disposed...     

A package seal particularly suited to pumps or other applications having a drive shaft which terminates internally of a housing at its connection to the impeller or fluid working element. In such an apparatus partial disassembly of the components provides access to the free end of the drive shaft. The...     

A seal continuously maintains a condition of fluid sealing between a housing and a shaft rotatably mounted in the housing, independently of the speed of rotation of the shaft. The seal includes a higher speed seal and a lower speed seal each disposed between the housing and the shaft. One of the seals...     

A dust cover adapted for sealing the opening extant between a fork tube and its attendant fork slider on a telescopic motorcycle fork assembly is disclosed. The cover includes a casing fabricated from materials which are resistant to the environment. The casing is mounted on an end of the slider and...     

An improved precision diluter/dispenser device is provided with features for effecting automatic compensation for non-linearity of aspirated fluid volumes of the particular piston and cylinder syringe assemblies that are included with the diluter/dispenser device in order to enhance the accuracy of the...