Abstract: An end face seal especially adapted for use in severe service environments such as for sealing track pins of crawler type tractors. The seal includes a primary annular seal, having a radially extending flange portion for contacting a mating surface in face sealing engagement and an axially extending flange portion, and a secondary annular sealing member positioned in use about the axial flange portion. The cross section of the secondary annular sealing member is shaped so as to accommodate both axial and radial compressive loads, and is preferably generally parallelogram-shaped in an unstressed condition. The seal also includes an annular reinforcing member of generally L-shaped cross section adapted to distribute the axial load to the seal face and to prevent radially outward deformation of the outermost portion of the radial flange of the primary seal ring.

Abstract: An annular seal of resilient material for creating a seal between a rotary shaft and a stationary member. The seal has an elongated mounting portion for embracing the surface of the shaft, an angularly extending intermediate portion which extends away from the mounting portion and stationary member, and an extremity portion extending angularly toward the stationary member with a sealing lip at its free end. A contact end surface is located at the end of the mounting portion on the end carrying the angularly extending intermediate portion. The sealing lip is in a first radial plane perpendicular to the center line of the mounting portion and the contact end surface being in a plane spaced from and parallel with the first plane in a static condition. By the above construction, the sealing lip will maintain a seal with the stationary member even at excessively high speeds of rotation.

Abstract: A self-contained, two-piece gasket sealing arrangement for drains and pipe connections includes a sleeve-like, cylindrical sealing gasket which is adapted to be secured about a pipe. The gasket includes a deep annular groove extending in one end thereof parallel to the axis of the gasket. A second gasket member includes a generally cylindrical, sleeve-like portion which is adapted to be received within the annular groove of the first gasket member. The second member includes a plurality of slot openings extending longitudinally therein and aligned with screw holes extending in one end of the second member. The first gasket member is provided with similarly spaced screw holes extending in one end thereof. A pair of compression rings are also provided, one of the rings including threaded posts extending parallel to the axis of the assembly and received in the screw holes of the first gasket member.

Abstract: A pump system wherein a pressure drop exists across a throttle bushing surrounds a rotating shaft. The throttle bushing comprises an internal annular debris-collecting groove disposed inwardly from the higher pressure end of the bushing and in communication with an internal helical groove extending across the bushing to the opposite low pressure end thereof. The outer wall of the annular debris-collecting groove, the higher pressure end of the bushing, and the internal annular surface of the bushing therebetween all cooperate in defining a lip which deters oversized debris from entering between the lip of the shaft surface. The lip, helical groove and annular debris-collecting groove cooperate to purge the bushing of debris and thus enhance the efficiency and wear life of the bushing.

Abstract: A sealing boot for connection between an outer member of a universal joint assembly and a shaft member associated with an inner member of the joint, the boot being formed with a first end portion which is connected with the joint outer member and a second end portion which is connected with the shaft member. The first end portion of the boot affords a sealing face which engages an end face of the outer joint member and which extends generally radially relative thereto and an axially extending cylindrical portion which fits over the exterior of the outer joint member in order to connect the first end portion of the boot with the outer joint member. The first end portion of the boot may be formed with external reinforcing ribs and internal inwardly extending projections which act as stops to limit movement of the boot if the joint is over articulated. The second end portion of the boot may be conventionally secured to the shaft member or it may be formed with inwardly extending sealing lips.

Abstract: An improved packer apparatus used for isolating portions of a drill hole or the like while providing an inner passageway for fluid communication and/or access between selected areas within the hole. An improved head design providing for an inner passageway of relatively greater diameter and facilitating the use of adapters for multiple packer applications is disclosed. Novel inflation means for inflating a packer gland are described. An improved reinforced packer gland is also described.

Abstract: A combined magnetic/centrifugal seal for a rotating shaft rotatably journalled within a housing. The rotating shaft has a generally circular cross section and at least one radially extending generally Vee-shaped cross section circumferential portion formed about its periphery. A plurality of radially extending circumferential teeth are concentrically arrayed around the periphery of the rotating shaft in parallel relationship to the Vee-shaped circumferential portion on the rotating shaft on at least one of its sides and spaced closely adjacent thereto. The housing has a complementary generally Vee-shaped cross section within which the Vee-shaped circumferential portion of the rotating shaft rides and in conjunction with the Vee-shaped cross section portion defines a space within which the concentrically arrayed circumferential teeth extend.

Abstract: For a twin spool gas turbine engine that utilizes a carbon seal. A bellows is supported to bias the carbon seal against its seal plate and a back-up seal consisting of a piston ring is located in the balance diameter of the carbon seal to maintain its loading in the event the bellows fail.

Abstract: A ring shaped seal is formed from an elastomeric material and is generally circular in cross-section. The material is covered in part with an elastomeric impregnated fabric secured thereon which serves as a work contacting surface for making a sealing engagement with a surface on a duct. A tubular ring shaped insert formed from an elastomer is embedded in the seal. A ring shaped spring is movably mounted in the bore of the tubular insert in such a way that the spring is not bonded to and does not adhere to the walls of the tubular insert. The insert is mounted in the seal so the walls of the tubular insert are between the spring and the elastomer impregnated fabric to hold the spring away from the fabric to prolong the life of the seal. The spring is sized so when the seal is mounted on the duct the spring can move in the bore of the tubular insert and exert a compressive force on the seal to compensate the seal for the decreasing resilience of the elastomeric material forming the seal.

Abstract: An oil ring having an axially and radially thin cross-section and a single cylinder contacting face to bear against the cylinder wall with a pressure of 2 Kg/cm.sup.2 to 6 Kg/cm.sup.2. The oil ring is dimensioned to satisfy the following equations:0.01.ltoreq.B/D.ltoreq.0.025 (1)T/B.ltoreq.4 (2)0.1.ltoreq.t/B.ltoreq.0.5 (3)where B is the axial height of the oil ring; D is the outer diameter of the oil ring; T is the radial thickness of the oil ring; and t is the width of the cylinder contacting face.

Abstract: A face seal cartridge assembly of predetermined working height tolerance for sealing a rotatable shaft in a fluid filled housing, wherein the face seal assembly comprises connected stator and rotor portions and one of these portions has an axial flexing membrane of resilient material secured therein for equalizing dynamic cyclical shaft motion.

Abstract: Combined metal-to-metal/compliant material stem sealing means for high pressure, balanced, rising stem gate valve includes at least one seal set at each of the actuator and balance stems. Each seal set comprises a pair of frustoconical metal ring gaskets between which are disposed two make-up rings of compliant, tough material of high lubricity, e.g. tetrafluoroethylene polymer. One make-up ring is adjacent to one gasket, and the other make-up ring is adjacent to the other gasket. A core ring of material that expands substantially less volumetrically upon heating than the make-up rings, e.g. compacted graphite, is disposed between the make-up rings. Around the inner periphery of the core ring adjacent the respective actuator or balance stem is disposed a bearing ring of material like that used for the make-up rings, e.g. tetrafluoroethylene polymer.

Abstract: A dynamic shaft seal for bidirectionally sealing fluid flow along a shaft comprising a disc of carbon material positioned between a pair of spaced flat rings mounted for rotation with the shaft. The carbon disc is allowed a range of axial movement forced by a pressure differential across the carbon disc so that the disc can form a contact seal with one or the other of the flat rings. The carbon disc is allowed to float between the flat rings when pressure on opposing sides of the carbon disc are equalized. Means are included to prohibit rotation of the carbon disc with the shaft.

Abstract: A safety seal for a shaft passing through a housing. The seal is normally maintained in a non-sealing relationship to the shaft, but may be actuated during emergency conditions by levers. The seal includes an annular, split housing having a radially extending compartment which contains at least two seal members which are held together by a bias to define a seal annulus. The seal members are radially contracted into sealing engagement and expanded to a non-sealing position by cams or levers mounted in the seal members.

Abstract: A watertight seal (1) between two adjoining channel-shaped concrete elements (2) has an elastic sealing strip (3) sandwiched between a socket (5) of one concrete element (2) enveloped by the socket (5). The sealing strip (3) is recessed and has a transverse profile such, that when the socket is slid over the wedge (7), material (12) of the sealing strip (3) shifts in a direction contrary to movement of the socket in order to prevent damage of the sealing strip.

Abstract: For a bearing mechanism, a pair of oil seals are installed within an outer cylindrical housing and elastically encircle a rotating or reciprocating shaft extending concentrically through the housing. Each of the oil seal is made of rubber or synthetic resin and has a prop ring made of steel wire extending underground through a radially outer portion of the oil seal. The prop ring is partly cut out and thus provides a radially outwardly directed elasticity for close adhesion to the inner surface of the housing. The radially outer portion of the oil seal extends in a radially inward direction to form an oil sealing lip and a dust sealing lip, with a narrow dog-legged portion at an intermediate portion of the oil seal which permits the oil seal to be flexible in a radial direction. An additional seal having substantially a similar elements and structure may be installed as a dust seal.

Abstract: An external manhole sealing assembly comprising a flexible sleeve spanning the joint between a manhole frame and a manhole casing, a frame adapter for forming a sealing surface for said sleeve, the sleeve being secured to the sealing surface on the adapter and to the manhole casing by mounting bands, the sleeve including sufficient flexibility to allow for heaving of the frame with respect to the casing.

Abstract: The disclosed water stopper and water stopping process use an aqueously-swelling water-stopping composition consisting of 10 to 40 weight % of rubber whose main ingredient is reclaimed rubber, 10 to 20 weight % of silicic compound, 10 to 60 weight % of bentonite, and 10 to 40 weight % of plasticizer. The aforesaid water-stopping composition may be extruded into an elongated water stopper with or without a core therein, which water stopper can be inserted into a joint gap or other gap of structural members to stop water at the gap.

Abstract: In a cylinder head gasket for an internal-combustion engine, composed of a disc of fibrous and/or porous soft material provided with passages, and a metallic casing extending around one such passage and presenting two arms each disposed at a respective side of the disc with at least one arm being angled in the direction toward the soft material, and a saturating agent which is plastic or elastic when installed and which fills the pores of the soft material except for the region underneath the casing, the angled portion of the at least one arm has the configuration of an annular recess directed toward the interior of the disc in the immediate vicinity of the end of the one flange arm.

Abstract: An improved mechanical seal assembly comprising a generally stationary seal ring and rotatable seal ring, each with opposed seal faces, the stationary seal ring being connected to a stationary housing by elastomeric keys. One of said seal rings is constructed of a material such as a carbon graphite composition which is more brittle than the other which is constructed of a much harder less brittle material. As in most seals of this character, the seal faces are lubricated by a fluid film flowing radially across the opposing faces. In the absence or upon failure of the film, the rings can seize, generally resulting in a breakage of or other damage to the more brittle seal ring. However, the elastomeric connecting keys provide a cushion for absorbing dynamic forces in the tangential direction, to distribute bearing loads substantially evenly and to allow radial deflections of the stationary seal ring relative to the housing due to thermal and pressure effects.