Abstract: A steel laminate gasket of the invention is installed in an internal combustion engine having at least one hole therein. The gasket comprises a first metal plate, and a second metal plate situated under the first metal plate. The first plate includes a sealing device around a first hole to be sealed, and a wide bead situated between the sealing device and a base portion of the first plate. The second plate has a second hole larger than the sealing device, and a support bead around the second hole. When the first and second plates are assembled, the second plate does not pile the sealing device, while the support bead is located under the wide bead. When the gasket is tightened, the sealing device seals around the hole, and also, the support bead supports the wide bead to widely seal around the hole.

Abstract: A method and apparatus for sealing between relatively articulable surfaces is provided by folding a thin flexible sheet material to form a multilayer flattened elongated member. A large gap can be sealed, and seal installation and service life is improved by clamping a stiffened thickened portion of the seal member to each surface. Resulting avoidance of stress concentrations, combined with increased flexibility attributable to its multilayer construction, contributes significantly to improved installation and service performance of the seal.

Abstract: A unitized radial lip seal assembly includes an outer annular case and an inner annular wear sleeve loosely interlocked by flanges or walls formed at the axial ends of the wear sleeve. After initial installation of the unitized assembly within a housing, the wear sleeve can be axially shifted a slight distance to provide a slight axial separation of the wear sleeve from the annular case. Two separate lip seal elements are mounted to the outer annular case and protected from damage during shipping and installation by abutting surfaces of the case and wear sleeve.

Abstract: A metal laminate gasket of the invention is installed in an internal combustion engine having at least one hole therein. The gasket comprises a first metal plate, and a second metal plate situated under the first metal plate. The first plate includes a first sealing device around a first hole to be sealed, and an inclined portion between the first sealing device and a base portion of the first plate. The upper surface of the base section is located in a level lower than the upper surface of the first sealing device. The second plate has a second hole larger than the first sealing device, and a second sealing device around the second hole. When the first and second plates are assembled, the second plate does not pile over the first sealing device. When the gasket is tightened, the second sealing device is at first compressed by tightening force and deforming force of the inclined portion to thereby equally tighten the second sealing device.

Abstract: A needle packing assembly is described comprising an annular seal (1) of ultra-high molecular weight plastics material such as polyethylene. A stepped concentric passage (4) passes through the seal with a shoulder (6). The outer end of the inner wall of the passage has a sealing lip (7) formed by a 15.degree. angle with the inner wall. The lip engages a needle (8) of a valve preventing the ingress of fluid past the seal. The assembly also includes a liner (9) made of a lower molecular weight yieldable plastics material such as P.T.F.E. to provide a slidable seal with the needle (8). The liner is forced against the shoulder (6) via a packing piece (10) and disc springs (12) by a nut (14) screw-threaded onto a sleeve in a spraygun. Adjustment of the nut (14) forces the liner to expand forming a self-lubricating bearing with the needle (8) and forces the sealing lip into engagement with the needle to prevent the passage of fluid past the seal.

Abstract: A sealing assembly is described, of the type in which a substantially rigid screen adapted to couple with a respective housing seat for the assembly itself on a member to be protected fixedly supports a sealing member of elastomeric material; the screen is made in a plastically deformable material and an outer peripheral portion of the screen, which with the sealing assembly not in use is inclined obliquely in the direction of introduction of the sealing assembly into the seat, is connected to the remainder of the screen through a stamped embossment shaped in such a way as to be able to act as a plastic hinge adapted to allow a rotation of the outer peripheral portion of the screen in a direction opposite that in which the sealing assembly is introduced into the seat during a mounting phase.

Abstract: A mixing tank for a liquid is disclosed with a built-in agitator having a shaft extending through an upper wall of the tank for engagement with a drive motor module. For shipping purposes, the shaft opening is sealed against leakage of the liquid by a seal ring which is compressed by a seal clamp between a collar fixedly mounted on the shaft and a fixed member on the upper wall of the tank. When the agitator is operated at a work station to mix the liquid, the seal clamp is released and the agitator shaft is driven by the drive motor module. In order to prevent liquid leakage around the shaft during shaft rotation, a rotor is mounted on the shaft inside the tank and the liquid which migrates up the shaft to the rotor is thrown outwardly thereby.

Abstract: The present invention is a brush seal for use between two components which move relative to each other. The brush seal has multiple layers of bristles, and the bristles within a particular layer have the same cross-sectional area or "thickness". The layers are arranged in the order of increasing thickness, with the bristles of the layer that forms the high pressure face of the brush seal having the smallest cross-sectional area. The larger bristles support the smaller bristles, and a backing plate supports the larger bristles.

Abstract: A metal laminate gasket of the invention is used for an internal combustion engine. The gasket is basically formed of first and second outer plates, at least one middle plate situated between the outer plates, and a sealing member situated adjacent a hole of the engine to surround and define the same. The gasket further includes a first seal ring, and a second seal ring situated outside the first seal ring, both being located outside the sealing member relative to the hole of the engine. A supporting member is integrally formed with one of the outer and middle plates to laminate over the second seal ring. Therefore, when the gasket is tightened, the second seal ring provides surface pressure greater than that on the first seal ring. The surface pressures on the seal rings can be easily changed and regulated by the supporting member.

Abstract: A totally split mechanical face seal being installable and replaceable without necessitating breakdown of the shaft and/or housing. The inventive split seal is well suited for replacement of packing or stuffing in heavy duty or inaccessible locations. The inventive seals include a sealing element that seals the primary ring against the shaft and rigidly positions the primary ring in the axial, circumferential and radial directions, and also includes a sealing element which seals the mating ring against the housing and non-rigidly positions the mating ring in the axial direction while simultaneously providing an axial biasing force on the mating ring to provide mating contact of the two rings.

Abstract: A metallic gasket for multi-cylindered arrangements includes two base plates formed of a resilient metal, each having an array of beads on the peripheral edge of an opening provided for a combustion chamber. One of said base plates is provided with an array of arched beads which are associated with an odd-numbered cylinder and displaced from the center of an inter-cylinder space in a given direction to define flat segments on which stoppers are located, and the other base plate is provided with an array of arched beads which are associated with an even-numbered cylinder and displaced from the center of the inter-cylinder space in a direction opposite to the first-mentioned given direction to define flat segments on which stoppers are located. The base plates being laminated antisymmetrically with respect to each other.

Abstract: A live-load device for applying a compressive force to packing or gasket material in a valve or pipe conduit junction. The device incorporates spring-washers having resilient blades for imparting a spring force. The spring force is transmitted from each blade through a ball-bearing seated at a selected one of a plurality of contact points along the blade tip. The spring constant of the device is selected by positioning the ball-bearing at a particular one of the contact points. This adjustment capability makes the spring device universally adaptable to a wide variety of valves and conduit junctions.

Abstract: A three-piece oil control ring includes a pair of radially split, generally flat annular rails which are supported in an axially spaced relationship by an annular spacer-expander. The expander defines alternating, axially symmetrical and generally U-shaped loops or corrugations. Each loop includes a pair of legs joined to a pad. The pad has a stepped configuration in radial cross section and includes a raised, outer, generally flat portion which supports a rail and a lowered central or intermediate portion. Each loop includes an axially extending lug or tab. The central portion is formed with a dimple or depression which provides sufficient material during the forming operation to configure the lug with a circumferentially extending, elongated rail contact surface. The legs of each of the corrugations are substantially vertical, having an angle from vertical within the range of zero to thirteen degrees.

Abstract: A gasket comprises a peripheral loop of sheet metal encased in an elastomeric material, the core being locally thickened, preferably in the vicinity of fixing screws by lateral projections from the stamping which are folded over to double the thickness, and the double thickness is then joggled to distribute the thicker portions symmetrically of the single sheet portion, the thickened portion then being closed to control the dimensions more accurately and tend to lock the edges together.

Abstract: A three-piece type oil ring assembly adapted to be fitted in an oil ring groove of a piston disposed within a cylinder comprises a spacer expander in the form of a gapped annulus made of section steel having substantially H-shaped radial cross section, and a pair of upper and lower side rails, each in the form of a gapped flat annulus. The spacer expander includes an axially protruding outer portion disposed on the outer circumference thereof and facing the inner surface of the cylinder, an axially protruding inner portion disposed on the inner circumference thereof and facing the innermost wall of the oil ring groove, and an axially flat connecting portion extending between the outer and inner protruding portions. The outer protruding portion has side rail supporting surfaces formed on the upper and lower ends thereof so as to be inclined toward the axially symmetrical centerline thereof along the radial direction at an acute angle with the radial direction.

Abstract: A stepped shaft passes from a high pressure region, through a vented low pressure region and into an intermediate pressure region. The high pressure region is separated from the low pressure region by a first brush seal and the intermediate pressure region is separated from the low pressure region by a second brush seal. The radius of the shaft is greater at the first brush seal than at the second. This second brush seal bears a circumferential flange on its backplate to deflect fluid leaking between the first brush seal and the shaft radially inwards, the radius of the flange is less than the radius of the shaft at the first brush seal.

Abstract: The packing according to the present invention is composed of a string-like body formed of an elongated tape-like packing material having at least one layer is repeatedly folded in direction at a right angle to the longitudinal direction thereof in a zigzag manner with peak portions and valley portions alternately formed. According to the packing, the string-like body cut into a predetermined length according to the diameter of a shaft with which it is to be used may be wound on the outer peripheral surface of the shaft with the width or thickness direction of the string-like body directed in the radial direction of the shaft. Thus, the packing is versatile with respect to the shaft diameter. The packing itself produces no slip in the axial direction of a shaft. This prevents the packing from protruding, thus eliminating stress release due to a decrease in volume. The packing is used with the string-like body folded in the three-dimensional directions.

Abstract: A unitized seal includes a first seal casing having a radially-extending unitizing flange and a second seal casing having an annular elastomeric bumper. The bumper has an engagement surface which confronts the unitizing flange for engagement therewith. Upon installation of the seal, the unitizing flange compresses the bumper. Upon initial rotation of the seal, the unitizing flange slices into the bumper so as to form a labyrinth-type seal. This arrangement reduces running torque and seal lip temperature.

Abstract: A sealing ring made up of nestable elements is constructed by forming a basic cylindrical-frustoconical element having the function of withdstanding the height variations which are liable to be produced by a force exerted on the sealing ring in its axis of revolution. At least one of the nestable elements is formed of expanded graphite and compressed with a constant ratio. The elements are then fitted within each other until a sealing ring of predetermined height is obtained.

Abstract: A sealing device dispossed between two members which are relatively rotatable, such as rotation shaft and housing of machinery, includes a first seal ring provided with a resin seal lip being disposed in an axial direction of one of the members to be sealed and having a sealing surface and a second seal ring provided with an elastic rubber seal lip disposed in an axial direction of one of the members to be sealed, the rubber seal lip being provided with a sealing surface closely contacting the sealing surface of the resin seal lip. The first and second seal rings are secured by a securing means. The securing device for securing the first and second seal rings is composed of an annular sealing recess formed on another surface of the resin seal lip opposed to the sealing surface thereof and a sealing projection formed on the sealing surface of the rubber seal lip of the second seal ring.