Abstract: An improvement for a stuffing box for sealing a shaft, such as a valve stem, in a first housing, such as a valve body, where the shaft extends through the housing and original seal devices are provided in an annular chamber or packing gland between the housing and the shaft with a first compression device provided to compress the packing longitudinally with respect to the shaft to allow radial expansion of the material and sealing in the packing gland where the present invention provides a second housing, which is generally cylindrical in shape to also surround the shaft and define an annular space and is split into first and second halves adapted to be connected together to surround the shaft and define a second packing gland, a packing compression device, which is longitudinally split and has a bearing surfaces which are adapted to be received in the annular area or packing gland defined by the second housing, so that second packing material can be received within the second packing gland and compressed by

Abstract: A cylinder head gasket for an automotive vehicle has its fire ring constituting a principal part of the gasket attached at spaced apart locations to a pair of lateral parts onto which respective elastomeric seals can be molded independently.

Abstract: A gasket comprises a flat body portion having two gasket facings and an inner reinforcing core, the gasket having an aperture defined therein, said aperture being provided with secondary sealing means comprising flat annuli located on opposite faces of the body portion in those regions there of surrounding and adjacent the aperture, the annuli extending into the aperture to provide annular primary sealing means radially inwardly of the margin of the aperture, and is characterized in that one of said annuli is folded around radially outwardly of the aperture to at least partially enclose, locate and retain a primary sealing ring radially inwardly of and relative to the margin of the aperture, said primary sealing ring comprising marginal portions of both of said annuli and co-operating portion of said reinforcing core which projects radially inwardly of the aperture from flat body portion.

Abstract: A fluid-tight shaft mounting for rotatably and fluid-tightly supporting a shaft member having one end rigidly mounted with a driven element, for example, a pump impeller, which mounting comprises a generally tubular housing through which the shaft member extends, a sealed bearing assembly positioned within the housing and exteriorly around the shaft member for the support of the shaft member relative to the housing, and an axial-mechanical face seal assembly interposed between the driven element and the sealed bearing assembly and exteriorly around the shaft member. The housing has at least one passage defined therein for communicating an annular space between the bearing assembly and the face seal assembly, with the outside of the housing. It also comprises an annular partition member disposed around the shaft within the annular space, dividing the annular space into a pair of annular chambers that are communicated with the passage in the housing.

Abstract: An annular lip type sealing ring includes an annular body with a generally U-shaped cross-section having a curved heel or base portion in the preferred embodiment and two spaced apart lip portions that define a groove therebetween. The groove terminates at a closed inner end portion near the heel or base and at its opposite end adjacent an open end portion. At least one of the lip portions has respective inwardly and outwardly extending lateral projections. The outwardly extending lateral projection seals against for example a valve shaft, pump plunger or the like. The lip portion has an outer free end with an outer arcuate curved surface. The inwardly extending laterally projecting portion includes an inner curved surface. An elastomer pre-loads the lips with a load that biases the lips to spread apart. The inwardly extending lateral projections conform to and confine the elastomer.

Abstract: An annular wiper for piston rods, disposed in a cylindrical wall opening wherein an axially movable piston rod is running, comprises a reinforced ring of an elastic, somewhat flexible material having a portion with an inner diameter slightly greater than the outer diameter of the piston rod and an axially outwardly projecting and radially inwardly projecting lip with a somewhat smaller inner diameter than the outer diameter of the piston rod. The reinforcement comprises a first annular portion surrounding the periphery of the elastic ring, creating a torque center line for the resilient ring, and a second annular portion absorbing as a compressive force the radially inwardly directed force exerted by the elastic ring as it turns around the torque center line.

Abstract: A seal having an exterior seal casing which includes a mounting surface and a seal lip body bonded to a portion of the casing, with the seal lip body comprising annular surfaces defining the air and oil side portions of a primary lip which meet along a generally cylindrical locus of measurable axial extent to provide a primary seal band with a plurality of spaced apart hydrodynamic pumping elements located on this seal band. An auxiliary lip is defined by a pair of frusto-conical surfaces meeting along a generally circular locus to provide an auxiliary or excluder lip portion. Said primary and secondary lips are spaced apart by an annular region of generally V-shaped cross-section, and the primary lip dimension or the pumping elements serve to maintain the primary lip seal band spaced just apart from an associated shaft, at least in the regions of the elements. Said auxiliary lip is of reduced diameter in relation to said seal band dimension in the relaxed condition of the seal.

Abstract: A seal ring has a holding ring for fixedly mounting the seal ring on one machine part. An axially concentric guide ring is tippably supported on one side on a circumferentially-cylindric side of the holding ring. The other side of the guide ring guides the seal ring on another, relatively-movable machine part. A sealing ring having a sealing lip for sealing about the relatively-movable machine part is sealingly connected to the guide ring. A membrane-like annular projection of the sealing ring can be sealingly connected to the holding ring to seal and hold the holding and guide rings together.

Abstract: An improved dual ring sealing arrangement (10) for a piston head (17) having at least one circumferential groove (15) formed therein, wherein the arrangement comprises a first sealing ring (13) having a recess (23) adapted to receive a protrusion (22) formed on the second sealing ring (14), whereby the respective ring gaps (20) are off-set from one another when said first and second sealing rings are joined together in a mating relationship.

Abstract: A siren comprises a compressed air supply which is deflected by stationary deflectors to exit radially through stator ports. A rotor with spaced ports rotates between the stator and deflector thereby opening and closing the stator ports. Stationary vanes are disposed at circumferentially spaced locations, and constitute together with the deflector plate and stator and rotor housing, plenums. There are fewer rotor ports than stator ports, which generates an out-of-phase acoustical pattern which creates an acoustic combination from the stator ports of an acoustic output at a distance from the siren which is more uniform spatially. The thermoplastic seal between the stator and the rotor has minimal clearance under operating conditions havign been run-in and plastically deformed at a temperature higher than for normal operation.

Abstract: A sealing and trimming strip arrangement in two parts which are locked together by means of a key carried by one part which fits into a channel defined in the other part. The latter part is secured to a flanged joint running around a vehicle door opening by means of double-sided adhesive strip and carries a soft seal. The first part is adapted to trap and hold the head or other lining material on the inside of the vehicle body.

Abstract: 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 material having an interference fit with the male coupling part poppet valve. The outer diameter of the seal body includes an annular recess receiving an elastomeric O-ring, and the mass of the primary seal body provides maximum strength within the confines of the gland recess to resist deformation due to pressurized fluid to prevent blowout of the seal from its recess.

Abstract: An inflatable packer comprising an elastomeric tubular core, an outer cover, an annular reinforcement sheath sandwiched between the core and cover comprising a strength zone composed of strain-resisting elements of high modulus extending helically at alternate lay angles of less than 40.degree. with respect to the packer axis, and sleeve means to which the reinforcement is securely attached at each end of the packer. In one embodiment a transition reinforcement zone is interposed between the tubular core and strength zone to improve the flex properties and increase the life of the packer. In another embodiment an improved anchor means formed of a frusto-conical matrix encapsulates embedded reinforcement members.

Abstract: A hydrostatic or hydrodynamic shaft seal comprises a ring revolving with the shaft and an axially movable static ring which is sealed against the housing by two O-rings and forms, with the revolving ring, radial seal gaps. An incompressible fluid flows and stabilizes the seal gaps and the static seal ring has a cavity for receiving the stopping or cooling liquid. A number of tensioning spring elements are arranged on the circumference or end of the static ring which take support against a ring which serves as a pressure limiting valve.

Abstract: A self-aligning and self-lubricating stuffing box for oil well polish rods, pump rods and the like, and comprising a housing disposed around the outer periphery of the rod and having an internal cooling chamber surrounding the outer periphery of the rod for retaining a fluid reservoir in engagement with the rod for an efficient lubrication thereof, at least one valved internal passageway provided in the housing for automatically directing the fluid to and/or from the cooling chamber as required during the operation of the polish rod during a well fluid production process, at least two longitudinally spaced bushing members disposed in the housing and in engagement with the outer periphery of the rod for assuring an efficient axial alignment between the housing and the rod during the reciprocation of the rod, and a swivel connection for overcoming any misalignment between the pump jack and the pumping "T" during the well production operation.

Abstract: A dual-lip shaft seal with two PTFE sealing members bonded to a molded elastomeric body, and a method and mold for its manufacture includes an elastomeric body bonded to the radial flange of a metal case and provides (1) a shaped lip with a garter spring held in a recess and, bonded to its other side, a frustoconical PTFE ring providing its sealing lip portion and (2) an inflexible portion bonded to a radially extending PTFE wafer.

Abstract: A slide-ring seal for sealing a shaft rotating with respect to a wall. The slide-ring sealing comprises a frame portion provided with connections for a sealing liquid and seal rings (4) provided with slide rings (5), which seal rings are so positioned with respect to each other that the sealing slide surfaces of the slide rings (5) are pressed against each other and rotate with respect to each other. Each slide ring (5) is thereby fastened on the seal ring (4) thereof by means of a shrinkage fit in such a manner that a radial press force (F.sub.K) of the shrinkage fit is wholly directed to act on the center of mass (K) of the cross-sectional area of the slide ring (5). In order to prevent distortion of the slide surface of the slide ring (5), an axial force (F.sub.L) created by deformations of the seal ring is wholly directed to act on the center of mass (K) of the cross-section of the slide ring (5).

Abstract: Leakage producing faults in a guide tube of finite length are repaired by encapsulating the guide tube within a sleeve-like member which extends between a wall, from which the guide tube projects, and a housing which passes through the guide tube and extends beyond the end thereof. The sleeve-like member has resilient seals at the ends thereof, is pre-loaded to partially compress the seals and is shaped so that exposure thereof to a pressurized fluid will result in further compression of the seals.

Abstract: Sealed bearing rotary cone rock bits that utilize a standard belleville seal oftentimes require that the static side of the seal be secured to a junction formed between a shirttail portion and a journal of a leg of the rock bit. A metal ring on the static side of the belleville seal is secured to the junction between the journal and the shirttail portion of the leg and imposes a load on the inner diameter of an encapsulated belleville spring. By preloading the inner diameter of the belleville spring, the load on the spring continues to increase as the spring is deflected during use. The present invention utilizes an isolated encapsulated belleville spring such that the inner diameter of the belleville spring is not trapped between the metallic ring on the static side of the seal. The result is that as the deflection of the spring is increased under operating conditions, the load reaches a peak value and then begins to decrease.

Abstract: A flexible double toric sealing ring comprising two toric sealing ring sttures 2, 3 which ensure, respectively, a static seal and a dynamic seal. A counter ring is mounted radially on the second sealing ring structure and floats with it to allow self centering of the arrangement with respect to the valve seat. A sealing membrane 8 presents an elastically deformable structure 12 interconnecting the two sealing ring structures 2 and 3 while partially covering them. The two sealing ring structures 2, 3 are mounted on opposite sides of the middle section 11 of membrane 8. This double toric sealing ring can be advantageously applied to a butterfly valve.