Abstract: A shaft seal containing magnetic liquid, for pump shafts or the like, consists of a permanent magnet which surrounds the shaft and is a distance away and one or more pole pieces connected to the said magnet. The pole piece, together with the shaft surface, forms an air gap in which the magnetic liquid is held by the magnetic field, so that a liquid sealing ring is produced. A volume of gas located between the magnetic liquid seal and the shaft channel to the medium prevents the magnetic liquid from coming into contact with the medium.

Abstract: Labyrinth seal (11) which is suitable for providing a seal between elements in relative rotation in the presence of infiltrating substances and which is particularly, but not only, suitable for providing a seal between rolls (12) and a housing (16) of rolling stands (10), such seal (11) comprising a stationary collar (19) and a rotary collar (18) that together form a labyrinth (26), means (24) to deliver fluid under pressure and a sealing packing (20) of a flexible material, such sealing packing (20) being located in the innermost portion of the labyrinth (26) and facing such labyrinth (26), the means (24) to deliver fluid under pressure delivering such fluid under pressure to a portion of the labyrinth next to such sealing packing (20).

Abstract: A combined intake-exhaust gasket for internal combustion engines comprising a gasket plate which has at least one metallic intermediate layer arranged between two outer metallic layers and in which at least one exhaust-outlet opening and one intake opening adjacent thereto are provided, each of which is limited by a sealing element. In order to seal the intake opening by means of an elastomeric sealing ring but also protect this ring from the high exhaust temperatures and mechanical wear and tear, the sealing element of the intake opening has a sealing ring which is made of elastomeric material and limits this opening as well as a web-like metallic support member which is secured to the sealing ring, projects outwardly therefrom in radial direction and is inserted loosely between the outer layers of the gasket plate.

Abstract: A gasket, such as an exhaust manifold gasket, having improved recovery, sealability and stiffness characteristics. The gasket has two embossed metallic layers and an intermediate compressed expanded graphite layer having a density of at least about 70 pounds per cubic foot. The embossments of the metallic layers are vertically aligned, the vertically aligned embossments extending in the same direction. The embossments are positioned around a clear-through service aperture.

Abstract: A split boot formed from a unitary, flexible body shaped to be helically wrapped around a universal joint or the like. Once the flexible body is wrapped around the joint with the mating edges engaged a main body is formed having a generally hollow truncated conical configuration with a corrugated or helical shape. One end of the main body has a smaller circular cross section than the other end. Each end portion of the main body has cutting guide ridges such that the diameter of the aperture in the end may be varied by removing some of the material from the body.

Abstract: A sealing element which is particularly adapted for use in preventing fluid flow between threadably interconnected components. The sealing element comprises a rigid portion formed of metal or the like and an elastomeric material portion. These portions are assembled together in a geometric configuration that protects the elastomer from shear forces and at the same time permits close control over the compression forces which can be exerted on the elastomeric portion of the sealing element. In this way, both overcompression and shear damage to the elastomer are effectively prevented.

Abstract: A tool for the measurement and inspection of tolerances in pipe threads on pipes and couplings, etc. formed as a pair of pivoting jaws having handles. One of the jaws includes an assembly of probes mounted for longitudinal displacement in a direction normal to the longitudinal axis of the pipe or coupling, the probes also being slideably supported within the assembly for transverse displacement in a direction parallel to the longitudinal axis of the pipe. Transducers are provided for measurement of the motion of the probe. The second jaw coacts with the first jaw for clamping action, the probes are displaced transversely so as to set into troughs of the threads whereby the probes are aligned for measurement of thread length. The taper is measured by means of an inclinometer disposed at the end of the assembly away from the probes. Normal displacement measures thread height as well as deviation in diameter, the latter providing a measure of the non-linearity of the thread pitch line.

Abstract: A temperature-sensitive gasket comprised of an annular ring formed by alternating layers of a spirally wound bimetallic strip and an adjacent strip of soft filler material, such as Teflon. When viewed in cross-section, the bimetallic strip has a centrally located V-shaped fold in an otherwise flat surface. Differences in the relative rates of thermal expansivity between the convex surface and the concave surface of the bimetallic strip cause the edges of the strip to spread apart, providing a reversably tighter seal between the surfaces adjacent the gasket. The spiral wound bimetallic and filler strips are also used in combination with annular compression rings.

Abstract: A bellows-form boot for universal joint which is formed integrally of a le-diameter cylindrical portion and a small-diameter cylindrical portion at both ends, the former being adapted to be fitted to a joint case housing therein the universal joint and the latter to a driving shaft, a central annular bellows portion having ridge portions whose diameters are tapered down toward the small-diameter portion, and a bracing boss portion extending between the large-diameter portion and the bellows portion. The boss portion has a wall thickness of 2 to 3 times the average wall thickness of the bellows portion and is profiled so that the inner face thereof may abuttingly contact with the edge face of the joint case and the outer face thereof is flush with the outer face of the bellows portion in the mutual joining area.

Abstract: A sealing ring for a rotary shaft which serves to retain and/or return a lubricant, includes a generally annular rigid supporting member and a generally annular elastic sealing member connected to the supporting member. The sealing member terminates in a sealing surface contacting the shaft with one side of the sealing surface directed toward the ring lubricant and the other side toward the atmosphere. On the atmospheric side, spaced-apart projections rest against the shaft surface. Projections on the lubricant side also press against the shaft surface. The projections on both sides include edges oriented obliquely to the shaft axis which provide pumping action when the shaft rotates. Lubricant pumped under the sealing surface to the atmospheric side by projections on the lubricant side is pumped back by the projections on the atmospheric side. In the process the seal is lubricated.

Abstract: A seal assembly for sealing a rotatable shaft to a housing includes a flexible bellows member and a removeable insert which are sealed against each other along complementary tapered sealing surfaces. A rigid restraint is located in the flexible bellows member so as to be isolated from corrosive fluid contained by the bellows to stabilize the sealing area of the sealing surfaces and prevent expansion in that area.

Abstract: 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 package seal has an outer member adapted to be disposed coaxially on the rotatable shaft and pass through the housing bore. The outer member includes a mounting flange adapted to be secured in the interior of the housing and a cylindrical body adapted to extend axially along the rotatable shaft from the seal flange to the exterior of the housing. The cylindrical body houses the seal components which provide a fluid tight seal between the housing and shaft.

Abstract: Cylinder head for gasket comprising a gasket plate having at least two combustion chamber apertures separated from one another by a web of a gasket plate, also comprising sheet metal combustion chamber edge trims approximately C-shaped in cross section and having flanges extending approximately parallel to the plane of the gasket plate and overlapping the edge regions of the combustion chamber apertures, the flanges of the combustion chamber edge trims overlapping one another in the region of the web, at least on one side of the gasket plate, in order to increase the sealing surface pressure in the web region and so one flange forms a sheet metal shim.

Abstract: An annular shaft seal to be moved over a first, larger diameter portion of a shaft and to seal against a second, smaller, diameter portion of the shaft. The shaft seal comprises a mounting portion, a sealing lip portion and a flexible channel-shaped portion interconnecting the mounting portion and the sealing lip portion. The sealing lip portion has a primary sealing lip and a secondary sealing lip disposed adjacent to and spaced axially from the primary sealing lip in a direction away from the mounting portion.

Abstract: A unitized grease seal. The seal member has a one-piece metal case having a cylindrical bore-sealing portion and a radial flange, and a molded elastomeric member bonded to the metal case to provide a portion bonded to the radial flange and an outer generally cylindrical portion bonded to the surface of the bore-sealing portion and providing a series of spaced apart inwardly extending retaining portions. The elastomeric member also has two diverging lip portions with a cavity between them, one providing a grease retention lip having small spaced-apart shallow indentations enabling passage of small amounts of grease into the cavity, the other lip portion having a polytetrafluoroethylene insert bonded thereto.

Abstract: A shaft seal assembly adapted for installation on and concentrically with a rotary shaft for sealing off a chamber laden with a gas/liquid mixture from a space situated externally of the chamber. The assembly has a chamber side and an air side and further comprises a sealing lip circumferentially surrounding a stationary part of the assembly; a labyrinth sealing ring situated axially adjacent the sealing sleeve on the chamber side of the assembly. The labyrinth sealing ring comprises a rotary wall component and a stationary wall component together defining a labyrinth gap formed of a plurality of consecutive axial and radial passages for guiding the mixture in a path having a plurality of radial and axial deflections.

Abstract: A packing material for shaft seals includes a resilient and flexible core of longitudinally braided yarns of discrete filaments, the core having been compressed into the form of a cylinder of substantially rectangular cross-section and in which the yarns are free of bonding agents in order to provide for relative movement of the filaments relative to each other within the core, the core having at least one winding on its outer surface of a graphite foil tape having its edges arranged in overlapping relationship to provide a continuous covering on the core, the outer covering on the core being secured thereto by a layer of adhesive.

Abstract: An aperture, for example a duct having a cable passing through it, is sealed by installing a laminate, comprising an adhesive layer, a heater layer, and a heat-recoverable foam layer, the thickness of which increases on heating, into the gap between the duct wall and the cable with the adhesive layer facing both the wall and the cable. On energizing the heater, the foam increases in thickness and forces the adhesive into sealing engagement with the wall and cable.

Abstract: A sealing ring for sealing a space between the outer surface of a spigot end and the inner surface of a socket end in a pipe joint comprises an annular sealing element consisting of elastomeric material and a substantially annular locking element consisting of a rigid or semi-rigid material. The locking element is divided at at least one point of its periphery and constitute at this point two spaced portions. Between these portions there is positioned a connecting element consisting of a material which is substantially more elastic than the material of the locking element.

Abstract: A valve system for use in inflating packers mounted on mandrels. The valve system uses one or more valves to permit, through the use of seals, the flow of fluid from the interior of a tubular mandrel to the interior of the inflatable packer when pressure applied in the mandrel exceeds at least a minimum pressure. The differential pressure across reciprocating seals is minimized through exposure of one or both sides, directly or indirectly, to the external pressure of the mandrel and packer, the exposure including the use of a check valve to permit flow from the exterior of the mandrel.