Abstract: According to an embodiment of the present invention a piston ring for internal combustion engines for use with a piston and a cylinder, is provided that has an external circumferential sliding surface adapted to slid against the internal wall of the cylinder. The piston ring has an ion-plating deposition layer formed over the externtal circumferential sliding surface, the deposition layer having pores and being made of a mixture of a first chromium nitride of CrN type and a second chromium nitride of Cr2N type. The mixing ratios in the mixture are more than 45.5 and less than 98.0 weight percent for the first chromium nitride and the balance portion for the second chromium nitride. According to another embodiment of the present invention, a piston ring for internal combustion engines for use with a piston and a cylinder, is provided that has an external circumferential sliding surface adapted to slid against the internal wall of the cylinder.

Abstract: A head gasket assembly (18) is used for sealing a joint between a cylinder block (12) and a cylinder head (14). At least portions of the head gasket assembly (18) must withstand high temperatures, high pressures and be flexible for sealing fluid passages such as lubricating oil and cooling water mixtures. The present head gasket assembly (18) is comprised of a main gasket body (40) constructed of a sealing material (46) having a plurality of apertures (48,50,52) positioned therein. A portion of the plurality of apertures (48,50,52) includes a combustion opening (52) having a first ring (54) positioned in the periphery of the combustion opening (52). A plurality of tape strips (60) having an end portion (62) attached to a side of the sealing material (46), partially surrounding the fire ring (54) and another end portion (64) attached to the other side of the sealing material (46).

Abstract: A circumferential seal arrangement has one or more expanding carbon rings and a rotating runner concentric to and radially outside of the carbon rings. Cooling oil is injected directly onto the outer circumferential surface of the runner and also in the direction of the bearings. The runner shields the seal interface from the cooling oil. To facilitate scavenging of oil from the cavity between the bearings and seal assembly and thereby further reduce the amount of oil reaching the seal interface, a disk pump is mounted on the main shaft between the runner and the bearing. As the main shaft rotates,, the disk pump slings oil adhering on its surfaces into an annular oil purge channel. The sealing arrangement also incorporates a discourager which forms a barrier to direct oil leaking through the seal interface to an overboard drain.

Abstract: A unitized seal assembly for vehicle wheel hubs and the like. The seal assembly includes a primary seal component and a wear sleeve component. The primary seal component includes an elastomeric seal body with a primary sealing lip contacting a first portion of the wear sleeve component, an intermediate excluder lip facing another portion of the wear sleeve, and an outer, excluder seal portion with a cylindrical contact surface. The wear sleeve component has a casing with providing an interior cylindrical contact surface and an elastomeric exterior excluder lip with a seal band portion facing the cylindrical contact surface portion of the outer excluder seal. The seal body is reinforced by a stiffener that engages one part of the wheel hub and the wear sleeve casing is mounted on the other part of the hub.

Abstract: The seal apparatus includes a resilient member having at least one sealing surface thereon and an engagement surface spaced up from the sealing surface. A spring's position to bias the sealing surface and flexible or elastic means are disposed in and about the spring in order to substantially increase the useful life of the resilient member.

Abstract: This invention relates to a magnetic gasket particularly suitable for forming a seal between a fixed part and an openable part in regions of curvilinear extension, for example in particular between the body and door of a vehicle, of the type comprising an profiled strip for fixing to the parts and a tubular seat housing a magnetized insert, characterized in that the profiled fixing strip and the tubular seat for the magnetized insert are connected together by an extendable deformable tubular chamber the opposing free walls of which are substantially curvilinear and curved in the same direction.

Abstract: A hydraulic seal is formed in the annular space 16 between two coaxial drive shafts 12 and 14. The seal is assembled with the two shafts in situ. An annular resilient seal member 30, which has an outer diameter which is larger than the inner diameter of the outer shaft 12, is deformed so that it can be passed through the annular space 16. The resilient seal member 30 is positioned in a channel 18 in the inner surface of the outer shaft 12. Once in the channel 18 the resilient seal member 30 returns to its original shape. The resilient seal member 30 is located between a pair of annular flanges 22 and 26 on the end of a pair of elongate members 20 and 24 of annular cross-section. The resilient seal member 30 protrudes into the channel 18 so that in operation it is partially immersed in a fluid 32 in the channel 18 to form the hydraulic seal.

Abstract: The gasket of the invention is formed of a compressible gasket member, a ring member, and main and auxiliary grommets. The auxiliary grommet is installed around a hole of the gasket member, and the ring member is situated inside the auxiliary grommet. The main grommet is arranged to surround the auxiliary grommet and the ring member. When the gasket is tightened, surface pressure is formed on the ring member and the auxiliary grommet without concentrating at one portion. Thus, the area around the hole is effectively sealed without deforming the engine parts.

Abstract: A seal assembly for use in a compressor stage of a turbine engine having a rotor disk which is attached to a plurality of rotor blades. Each rotor blade has an axially oriented dovetail attachment which connects to the rotor disk. Each rotor blade has an aftward side which is in contact with a high pressure region and a forward side which is in contact with a low pressure region. A plurality of seal segments form an annular ring located radially inward from the plurality of rotor blades. Each seal segment has an offset center of gravity which causes each seal segment to be securely attached to the rotor disk as centrifugal forces act upon each seal segment during rotation.

Abstract: A shaft seal in which a sealing lip provided on an elastomeric portion of a first annular member is in sealing contact with a sealing surface of a second annular member which in operation is adapted to rotate relative to the first annular member, and in which an annular elastomeric support portion provided on the first annular member supports axial forces on a radial surface of the second annular portion. The support portion includes protrusions with apices which cooperate with the radial surface of the second annular member and are distributed circumferentially at uniform intervals.

Abstract: A flexible non-planar graphite sealing ring is used to control leakage in a fluid handling device that is caused by a shaft extending through the wall of the device. The flexible graphite sealing ring comprises a chevron-shaped non-planar cross section having approximately complementary inner and outer end faces that are made from laminating sheets of graphite foil in layers transverse to the ring's axis. A plurality of flexible graphite rings are inserted over the shaft and into the stuffing box, occupying the space area between the shaft and the stuffing box. The flexible graphite sealing rings are oriented so that each ring's inner end face adjoins the outer end face of another ring. Upon application of a compressive force, either by internal pressure or by externally applied mechanical loading, the interaction between the dissimilar end faces cause an enhanced interference fit between the shaft and the stuffing box forming a seal.

Abstract: A rotary hydraulic machine includes a housing, a shaft carried for rotation and extending from the housing, and a shaft seal carried by the housing in sealing engagement with the shaft to prevent leakage of fluid along the shaft. The shaft seal has an annular shell adapted for mounting to the housing surrounding the shaft and radially spaced therefrom. A pair of annular resilient sealing rings are carried by the shell and extend radially inwardly therefrom into rotary sealing engagement with the shaft. A pressure relief valve includes at least one opening that extends radially through the shell between the rings, and a resilient band surrounding the shell externally of and overlying such opening. Pressure of fluid urges the band away from the shell to permit flow of fluid through the shell opening externally of the shell and band, while the band prevents entry of dirt or debris through the opening into the shell.

Abstract: An externally-mounted, stationary-design, self-aligning, rotary face-seal is provided for securement to a rotatable shaft member extending through a housing of equipment containing a media (e.g. liquid, gas or granular solids) which is to be sealed therein. The seal includes a diametrically-split mounting plate having a plurality of spaced-apart recesses in a face thereof, the assembled mounting plate being secured in sealed relation to the housing of the equipment and with the rotatable shaft member extending through the mounting plate and projecting into an ambient environment exteriorly of the housing. The seal includes a diametrically-split stator face disposed in the ambient environment. A face of the stator is fitted with spaced-apart anti-rotation guide pins, the projecting ends of the guide pins being disposed within the associated recesses in a face of the mounting plate. A resilient spring member is captured on each respective guide pin. One end of the spring member abuts a face of the stator.

Abstract: A unitized, fluid seal assembly for heavy duty applications. The seal assembly includes a primary seal unit, an annular wear sleeve, and a separately formed thrust bumper made from a stiff but resilient, high temperature resistant, lubricous plastic material. The thrust bumper has a body with opposed, tapered surfaces meeting to define a narrow band that contacts the radial end face of a radial flange on the wear sleeve or the primary seal casing. The primary seal unit includes an elastomeric seal body with primary and excluder lips, and the wear sleeve includes an additional excluder lip contacting a portion of the primary seal casing.

Abstract: A composite material usable for producing gaskets, the composite material being composed of a perforated metal core sheet sandwiched between facing layers having sealing properties and compression-laminated thereto. The core sheet is provided with a uniform array of square holes, each bordered by a set of four triangular tangs whose apex portions are flared outwardly with respect to the hole, the tang sets from alternate holes projecting from one side of the core sheet and the tang sets from the other holes projecting from the other side thereof. When the sandwich is subjected to compression, the tang sets on opposite sides of the core sheet then pierce the related layers and are caused to bend downwardly and thereby clinch the layers to the core sheets whereby the tang sets are then being embedded within the layers, each tang set affording an omnidirectional holding force.

Abstract: A sealing arrangement for a roll having a rotationally stationary crosshead extending through a rotatable hollow cylinder which forms an outer working circumference, includes longitudinal and transverse end seals disposed against the inner circumference of the hollow cylinder. The seals form at least one longitudinal chamber in the annular clearance space between the crosshead and hollow cylinder. The longitudinal chamber may be filled with pressure liquid for supporting the hollow cylinder. Each longitudinal seal in the form of a seal strip having a substantially L-shaped transverse cross-section with the shorter leg thereof directed against the inner circumferential surface of the hollow cylinder. The shorter leg includes a contact pressure relief surface facing the inner circumferential surface and spaced therefrom.

Abstract: A lubricated packing assembly for a reciprocating pump. The packing assembly includes a packing ring for sealingly engaging the pump plunger. A seal carrier is disposed adjacent to the packing ring. A vent zone is defined between the packing ring and a vent passage extending longitudinally through the seal carrier. The vent zone includes grooves on inner and outer surfaces of the seal carrier and a hole interconnecting the grooves. This hole is in communication with the vent passage. A lubrication passage is also provided in the seal carrier, and a seal is positioned on opposite sides of the lubrication passage. Lubricant is provided to the plunger between the seals. The lubrication passage and the vent passage are isolated from one another so that communication therebetween is prevented. In this way, leakage past the packing ring is vented without contaminating the lubricant so that pressure from the pumped fluid cannot stop lubricant flow.

Abstract: A sealing ring for sealing against fluid leakage between mainly planar surfaces of a pair of parts that are mounted in forced relation against each other. The ring comprises, in an exemplary form, a resilient member having a radially oriented annular section, and first and second ends projecting generally in opposite axial directions, respectively, from radially inner and radially outer portions of the annular section. The first end includes a first member projecting generally axially from the annular section, a second member projecting generally radially outwardly from the first member, and a third member projecting generally axially towards the annular member, such that the first, second and third members collectively have a generally U-shaped cross-section.

Abstract: The shaft seal between a fixed housing wall (2) and a revolving shaft (1) consists of a collar (6) fixedly connected to the shaft (1), respectively one leg of the U-shaped sealing rings (69, 71) pressing against this collar. The cavities (14, 15) of the sealing rings (69, 71) can be acted upon, via connections, by a pressure medium, wherein respectively one of the legs of the sealing rings (69, 71) is pressed sealingly against the collar (6). The annular chamber (17) coaxial to the end face of the collar (6) can be filled with a lubricant and/or a coolant by way of an inlet and outlet. This structurally simple shaft seal is arranged in compact fashion. This seal operates in a safe and reliable manner. For the prevention of chemical accidents, a circulating pressure medium can be provided to act only on the sealing ring (69) located closest to the reaction chamber (3), and this pressure medium can be continuously monitored for traces from the reaction chamber (3) by way of an indicator.

Abstract: A headband construction is provided which is formed from an elongated material section and an elongated elastic section having a cross section generally smaller than that of the material section. A pair of clips are provided which secure each end of the material section to a corresponding end of the elastic section. The clips have inwardly facing grippers such as pointed teeth at each end thereof and may for example be crimped to secure the sections together. Preferably, a cover is provided for each clip which cover is held in place at least in part by the corresponding clip. For the preferred embodiment, the covering is a cord which is secured at at least one end in the clip means and is wrapped therearound. For preferred embodiments the material section is formed of a plurality of elongated strands of material which are interconnected by wrapping, braiding or twisting.