Abstract: A gasket material has a resilient core of glass fiber and a jacket of glass or other suitable fiber over said core. The jacket and core may have therebetween an essentially impermeable sheath of a chemically resistant material. The jacket has therein enough polytetrafluoroethylene in dispersed form to prevent flow of liquid therethrough. The core may have enough of the polytetrafluoroethylene dispersion therein to prevent wicking.

Abstract: 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 the internal and exterior liquid present externally and internally, respectively, of the retainer; the seat ring is securely and liquid-tightly mounted on the rotary shaft for rotation therewith in a casing; the ring is fitted over a retainer axially movably, but nonrotationally and is normally pressed against the seat ring under the force of a bias spring which provides the sealing force for maintaining the seal between the seal faces when the external liquid pressure exceeds the internal liquid pressure, but the pressure difference is relatively small; the retainer in turn is mounted in the casing nonrotationally but axially movably due to the difference in pressure between the internal and external liquids, wh

Abstract: The specification discloses a pressure responsive pipe joint seal for sealing connecting pipe joint members. The sealing flanges on the seal define upwardly, outwardly and downwardly curved upper surfaces so that there is less tendency for them to get caught on a pipe joint member as adjacent members are slid into coupling relationship. The seal includes an inflatable bladder whereby the seal can be inflated after it is in its operative position. In one embodiment disclosed, the seal includes a cavity containing a lubricant, the cavity being covered with a rupturable membrane such that when pipe joint members are joined together, the membrane ruptures releasing the lubricant.

Abstract: A seal mechanism for the periphery of the rotor of a rotary piston engine including a sealing ledge supported on the rotor to be pivotable about an axis extending in the longitudinal directional thereof and operative to make sealing contact with an opposed surface of said rotary piston engine over a limited region of the periphery of the sealing ledge facing toward said opposed surface. Through at least one secondary member extending parallel to the sealing ledge at a point of its periphery between the sealing ledge and the rotor, a surface region is defined on the sealing ledge at which forces are developed by the fluid working medium of the engine to effect a desired sealing engagement between the sealing ledge and the opposed surface of the engine.

Abstract: The disclosure illustrates having a turbocharger housing and a turbine wheel shaft rotatable relative to one another and in which one of the members has a cylindrical surface and the other member contains an annular groove, a sealing ring being located in the annular groove and engaging the cylindrical surface. One of the radially extending walls of the sealing ring includes a chamfered portion such that the axial dimension of the radially inner surface of the sealing ring is less than the axial dimension of the radially outer surface of the sealing ring, the annular groove including a complementary shaped wedging surface for cooperation with the chamfered surface of the sealing ring.

Abstract: A seal assembly for a joint of each pair of adjacent links of an endless track assembly comprising a wear-resistant elastomeric seal ring and a resilient elastomeric load ring. A wear-resistant annular plate is bonded to one of the members of the joint. The load ring is compressed when mounted in place, thus urging the seal ring in sealing contact with the wear-resistant annular plate.

Abstract: A mechanical seal suitable for providing a seal to a shaft sealing section of a rotary machine, particularly of the type operating under high speed and high pressure conditions, including a stationary retainer for holding a stationary sealing element, resilient means and recoil preventing means, a seal housing secured to the stationary retainer in a manner to surround the stationary sealing element, and an inwardly projecting portion formed in the seal housing to prevent axial movement of the stationary sealing element which might otherwise be caused by the biasing force of the resilient means when the mechanical seal is assembled or disassembled. The parts of the mechanical seal can be attached to the casing or detached therefrom as a unit.

Abstract: A sealing device for sealingly connecting two coaxial conduits and the like of a conduit arrangement including a first conduit and a second conduit, wherein the second conduit is disposed a predetermined distance in the first conduit to provide between them an annular space adapted to receive the sealing device. The sealing device includes first projections and second projections, respectively, on the outer diameter and on the inner diameter whereby the projections on the inner diameter and the projections on the outer diameter are arranged at least in part in a common radial section of predetermined axial length. The outer diameter of the outer projections is greater than the inner diameter of the conduit having the greater inner diameter and the inner diameter of the projections arranged on the inner diameter of the sealing device are at most equal to or at least nearly equal to the outer diameter of the conduit having the smaller outer diameter.

Abstract: A readily penetrable vacuum indicator closure for sealing an open end of an air evacuated blood collection tube. The closure comprises a flexible tubular body with an open first end and a closed second end formed by a penetrable, flexible end wall, with the end wall having an inner surface and an outer surface. When pressure on the inner and outer surfaces is substantially equal, the outer surface is convexly curved and the inner surface is concavely curved. This end wall is sufficiently flexible to deflect under the influence of a pressure differential on the end wall, such as may be perceived when the closure seals an evacuated blood collection tube. The outer surface of the flexible end wall is readily visible, thus serving as an indicator of relative pressures on opposite sides thereof. A flange is annularly disposed about the periphery of the tubular body adjacent to the second end.

Abstract: A hub construction for a torsional vibration damper. The hub is formed of aluminum to obtain the known damper performance advantages of a lower moment of inertia. The hub is coated with a Teflon anodized layer to (1) protect it from oxidation, to (2) prevent the formation of aluminum oxide particles at the elastomer-hub interface. The coating is of a surface roughness of 60-70 micro inches, being a roughness in excess of that recommended by seal manufacturers. Unexpectedly, the coating does not injure a seal used with the damper, thus yielding a third advantage.

Abstract: A sectional gasket 11 includes corner junction members 12, straight junction members 13, and extension members 14. The junction members 12 and 13 each include a recess 19, and the recesses 19 each include axially extending laterally inwardly facing sealing surfaces 20 and 21. The extension members 14 each have a uniform lateral cross-sectional configuration along their entire axial extent. Each extension member 14 includes axially extending, parallel, laterally outwardly facing sealing surfaces 25 and 26. The sealing surfaces 25 and 26 extend continuously and without interruption along the entire axial extent of the extension member 14. The extension members 14 are characterized by the absence of any special tongue and recess at their opposite ends, and the extension members 14 are manufactured and stored in long continuous strips which are cut to the desired length and used in combination with the junction members 12 and 13 by the end user of the gasket 11.

Abstract: A rotor shaft sealing mechanism for a synthetic resin kneading machine is disclosed. The rotor shaft sealing mechanism includes a reverse screw member, a gland packing and a spring loaded compression member so that the three separate sealing means may act to seal the rotor shaft and prevent leakage of material. The sliding seal surfaces are separated from the mixing chamber so that particles produced by the wear thereof can be completely prevented from getting into the mixing chamber. The sealing surfaces are constructed of dry seals which prevents oil pollution in the chamber. The gland packing and compression member are resiliently held on to the rotor shaft by a retaining member which is resiliently connected to a support.

Abstract: A seal structure for use in high pressure pneumatic or hydraulic fluid actuators. A solid toroidal shaped elastomeric O-ring and a solid toroidal shaped backup ring are emplaced in a specially configured circumferential groove on an internal sleeve. A conical shaped ramp in the groove bottom permits the use of a solid backup ring with a larger internal diameter for ease of installation over intervening lands on the sleeve without distortion of the backup ring beyond its elastic limit. The difference in the sizes of the symmetrical O-ring and backup rings assist in their proper installation on the sleeve.

Abstract: The object of the invention is to improve the film stiffness of a face seal without increasing the sealing and dam area.The improved sealing apparatus (16) has a primary seal ring (20) in the form of a nose piece. A spring (24) forces a sealing surface (28) on the seal ring into sealing contact with a seat (18) to form a face seal. A circumferential clearance seal is formed in series with this face seal by a lip (34) on the nose piece. The width of the surface (36) of the lip is substantially the same as the width of the sealing surface (28) on the face seal. Also the clearance between the surface (36) on the lip and the shaft (10) is substantially the same as the spacing between the face sealing surfaces (28 and 30) on the face seal when the shaft is rotating.The circumferential clearance seal restricts the flow of fluid from a main cavity (14) to an intermediate cavity (32) with a resulting pressure drop.

Abstract: A labyrinth seal of a shaft comprises ring plates arranged in an alternating fashion in parallel with one another and coaxially with the shaft. One set of plates are rigidly fixed to the shaft and the other set of plates are fixed to a stationary sleeve. According to the invention, the sleeve has at least one through passage arranged in a plane intersecting the axis of the shaft and extending at angle ranging from about -60.degree. to about +60.degree. to a radial plane running at right angle to the axis of the shaft. The passage terminates at one end in the space between adjacent plates to remove the fluid under action of centrifugal force during rotation of the shaft.

Abstract: A gasket particularly for sealing the joint between the cylinder block and the cylinder head of a dry liner internal combustion engine comprises a pair of outer metal plates (1) having outwardly directed corrugations formed therein and a central composite metal plate (2) disposed between the two outer plates (1); the central composite plate comprises a central soft metal layer and hard metal surface layers which are bonded or integral therewith.

Abstract: An improved stuffing box can effect an auxilliary static seal with a moveable shaft to allow replacement of packing elements. The stuffing box includes a sealing ring concentrically disposed around the shaft and means for mounting the sealing ring radially spaced apart from the shaft to permit lubricating fluid to flow between the sealing ring and the shaft during movement of the shaft. The stuffing box also includes a seal container axially moveable along the shaft for pressing the sealing ring radially against the shaft to form the static seal.

Abstract: A face seal assembly mounted on a vertically oriented drive shaft is disclosed for use in connecting two members rotatable with respect to each other. The seal assembly includes a lower stationary graphite seal member which is received in one end of a rubber bellows. A spring within the bellows urges the upper surface of the graphite ring into contact with an upper rotatable second seal member, which is preferably a bronze mating ring. Liquid which seeps radially inwardly past the seal members is channeled within the rubber bellows to discharge outside the face seal assembly without contacting either the drive shaft, or the bearing member located below the bellows. The channel means includes a collar portion within the bellows extending downwardly along the drive shaft from a point adjacent the seal members. A bottom wall, contiguous with the collar encloses the bottom end of the bellows and provides support for the spring located within the bellows.

Abstract: Inner and outer sealing rings (16 and 18) for the balancing ring (12) of a hydraulic motor, each comprising an annular elastomeric body (30) including a flat, radially extending central ring (36) and a pair of sealing elements (38 and 40) projecting axially away from opposite ends of the central ring (36) and in opposite axial directions therefrom and tapering to a sealing lip (50 and 52) in the directions away from the central ring. The inner and outer sealing rings (16 and 18) have cylindrical O.D. and I.D. surfaces, (54 and 66), respectively. Each sealing ring preferably has a reinforcing ring (32 and 62) and a liner (34 and 64) of low friction material.

Abstract: When explosive gases are introduced into a combustion chamber care must be taken that no pre-ignition occurs. To this end, the gas is spatially subdivided into discrete volume elements, for example by means of a bundle of tubes having an internal diameter which does not exceed twice the quenching distance of the explosive gases. Such a division ensures that the wall distances of the gas portions of one volume element are greater than their quenching distances.