Abstract: A boot for a universal joint, which is made of a high-molecular elastomer, in which bellows having three or more ridges are extended between a larger and a smaller ring portion, and in which a valley is formed between the first ridge from the larger side of the bellows and the larger ring portion. In this boot, the crest of the first ridge has its inner circumference located outside of the imaginary circumference of the frustum of a cone, which is formed by joining the end portion of the larger ring portion at the side to be connected to the bellows and the crest of the second ridge. As a result, the wears of the ridges (especially of the first ridge) due to their mutual contacts are not promoted so that the boot can have its durability improved.

Abstract: A manhole construction for assuring tightly sealing a manhole/sewer pipe connection. The heart of the invention resides in a molded elastomeric circular gasket for resiliently supporting a sewer pipe in a manhole opening and sealing the space between the wall of the opening and the surface of the pipe. The transverse cross-section of the gasket has a generally triangular head, with a forward face provided with an arcuate depressing therein, and a sloping rear face; a generally rectangular body, integral with the generally triangular head and generally "L" shaped leg depending from the body and coextensive with the rear face of the body, the leg of the "L" being directed towards the forward face.

Abstract: A composite gasket for forming a seal between a pipe bell 52 and a spigot 58 comprises a major portion 12 of non-elastomeric plastic material and a minor portion 14 of elastomeric material. The minor portion is axially encased by the major portion. The minor portion includes a sealing lip 16 extending radially inwardly from the major portion. The composite gasket can be manually inserted within a preformed grooved bell or the grooved bell can be formed over the gasket while the gasket is mounted on a mandrel. The composite gasket is particularly useful with relatively large diameter pipe systems.

Abstract: An improved shaft seal for sealingly and rotatably mounting a torque-transmitting shaft within the pressurized housing of a pump. Generally, the shaft seal comprises a seal ring which is sealingly mounted within the housing, and a runner ring which is sealingly mounted around the shaft. Both the seal ring and the runner are preferably formed from 98% pure, hot-pressed silicon nitride. Additionally, the sealing surface of the seal ring is preferably radially tapered between about 635 and 645 microradians around its outer periphery, and between about 210 and 230 microradians around its inner periphery. The pressurized fluid within the housing enters the annular space between the two sealing surfaces and creates a flowing film of fluid upon which the two sealing surfaces may "ride" without frictionally engaging one another.

Abstract: A seal, especially a flat, gasket-type seal for placement between two structural machine parts. The seal has an elastomeric sealing member which is associated with a carrier member. The structural parts which are to be sealed off are adapted to be pressed against surfaces of the carrier member. The carrier member is made of a resistant synthetic material which is resistant to compression. To provide a one-piece component, the elastomeric sealing member is securely vulcanized to the carrier member. The vulcanized connection includes a peripheral surface which extends transversely between sealing portions of the elastomeric member, and a side surface of synthetic material which is disposed transversely between synthetic material abutment surfaces of the carrier member.

Abstract: In a mechanical face seal of the diaphragm bellows type having a face seal ring with a body defining a substantially flat, annular sealing surface, and a holder adapted to be disposed radially about the seal ring in interference fit with a loaded surface of the seal ring, the holder defining a shoulder surface for engaging upon a corresponding shoulder surface of the face seal ring, the holder positioning the seal ring for sealing engagement with an opposed sealing surface of a relatively rotating second seal ring, and the holder defining a loading surface adapted to apply radially inwardly directed contact pressure upon the opposed loaded surface of the face seal ring, the face seal ring and the holder having different coefficients of thermal expansion, contact pressure applied by the holder upon the face seal ring is applied to an area of the face seal ring loaded surface, the resultant of the contact pressure being disposed axially between the sealing surface and the centroid of the face seal ring thereby

Abstract: A gasket for sealing the gap between two approximately parallel sealing surfaces which are displaced axially relative to each other during the assembly, during which the gasket follows one of the sealing surfaces and is compressed between said surface and the other sealing surface. The gasket body which is made of a soft elastic material, for example rubber, consists of two main parts (1) and (2) which are connected through a narrower connection part in such a manner that the sliding part (2) can pivot relative to the attachment part (1). To avoid a relative rotation of the gasket parts such that the assembly becomes unsuccessful, the axis of the connection part (3) extends diagonally from the point of attack (A) on the sliding part (2), towards the supporting surface (7) on the attachment part (1). The sliding part (2) may have a concave surface (4), and the connection piece (3) can have a less stiffness than the sliding part (2). The attachment part (1) can be connected to a reinforcement (17 ).

Abstract: A strip structure intended for clamping on a flange has a channel defined by a base and two opposed side walls. At least one limb with a free depending end directed toward the base is positioned and secured on one of the side walls. An inward projection is also positioned on the side wall to which the limb is secured and adjacent to the limb. The limb has one face facing one side wall and another face facing the other side wall. The face facing the side wall to which the limb is secured has a recess therein which accommodates the projection on the side wall so that the strip structure can be attached onto a flange without undue force but strongly resists removal from the flange.

Abstract: The gasket assembly comprises an annular gasket (20) and a coaxial thrust ring. The central portion of the ring (20) is bounded by two faces (35) and (36) which are parallel and inclined so that the thickness of the central portion remains constant. The face (35) meets a face (34) by way of a portion (37) forming a right angle therewith, and the face (36) meets a face (32) by way of a portion (38) forming a right angle therewith. The contacting surface between the ring (30) and annular cavity (8) and between the gasket (20) and annular cavity (8) do not vary substantially as the degree of compression of the assembly varies; moreover, the deformation to which the ring (300) is subjected is substantially one of flexure. This means that as the degree of compression varies, in proximity to the working position, the axial thrust transmitted by the ring (30) to the annular gasket (28) does not vary substantially.

Abstract: A composite sliding structure which can be applied to automotive shock absorbers or sliding portions of hydraulic apparatus or pneumatic apparatus and comprises a deformable member in the form of piston, bush, or spherical seat, and a sliding member acting as a self-lubricating sliding member, which is partially deformed plastically and united with the deformable member into one body, thereby to prevent noise, vibration, an oil or gas leak.

Abstract: A cylinder head gasket for an internal combustion engine which is adapted to compensate for variations in the clamping or hold-down forces which are exerted on the gasket disposed within the joint formed between the cylinder head and the engine block. Because of the spacing of the cylinder head fasteners relative to the ends of the cylinders formed in the block, there are wide areas of the gasket extending between adjacent cylinder ends which are disposed at substantial relative distances from such fasteners. These wide gasket areas are defined at least in part by opposed circumferential segments of the adjacent cylinder ends. Each wide gasket area has a thickness which is substantially greater than the thickness of te remaining portions of the gasket, thereby, resulting in substantially uniform clamping forces being exerted throughout the gasket.

Abstract: A slide ring seal for sealing the gap between a rotatable shaft (1) and a fixed wall (2) to separate a space (3) for a pressure fluid from the external space (4). The slide ring seal comprises at least one seal ring (5) mounted on a fixed wall or a shaft and at least one face ring (6) secured to said shaft or fixed wall. The seal ring and face ring are provided with sealing slide surfaces that are axially pressed against one another. Moreover, the seal ring is mounted on said fixed wall or shaft through a bellows member (7). To achieve a slide ring seal being reliable in operation and having controlled sealing properties, the bellows member (7) is isolated from the space (3) for the pressure fluid by means of a sealed space (9). Said sealed space (9) is further connected to a regulable pressure source (11) by means of a conduit (10).

Abstract: A sealing assembly comprising a rigid sleeve-shaped baffle carrying at one end a removable cover which is also rigid, for closure of the end of the baffle, which internally is also provided with a deformably sealing element provided with radial ribs operable to define a labyrinth seal; an axial lip extends from this element and sealingly cooperates with a seat of the cover, respective axial shoulder means of this latter being simultaneously pressed under pressure against respective bayonet coupling means of the baffle.

Abstract: An annular sealing ring with a generally Y-shaped cross-section for sealing between a piston and the curved wall of a cylinder. The sealing ring includes a base with one or more horizontal ribs extending outwardly from each side thereof and a pair of lips with sealing edges, the lips being spaced apart to form a cavity therebetween wherein a solid, elastic expander ring is retained. The cavity is bounded by the similarly opposed inner surface of the lips. The expander ring is seated in a portion of the cavity so that a void is created in the cavity below the expander ring.

Abstract: An annular sealing ring with a generally Y-shaped cross-section for sealing between a piston and the curved wall of a cylinder. The sealing ring includes a base and a pair of lips with sealing edges, the lips being spaced apart to form a cavity therebetween. Braces connect the lips a regular intervals, forming trapezoidal voids.

Abstract: A seal between an object such as a cable, cable splice or branch-off, and a surface such as a recoverable sleeve by means of a flexible envelope containing a void-filling composition. The void-filling composition undergoes a change from a low viscosity on installation, which allows the flexible envelope to conform to the object, to a high viscosity after installation, which gives mechanical strength to the seal. Deformation of the flexible envelope on installation may be brought about by installation of the recoverable sleeve or other surrounding surface.

Abstract: A sealing cap for cylindrical parts such as a bolt guide of a spot-type disc brake, comprises an elastic pleated bellows (15), one end portion of which is fastened to the periphery of a first cylindrical part, while the other end portion thereof is secured to the periphery of a second cylindrical part. A rigid reinforcing and retaining member (16, 17) is provided on at least one of said end portions (13, 14), with each reinforcing and retaining member being arranged with at least part of its radial extension on the same radius. To create a sealing cap which affords ease of manufacture and assembly, at least one of the reinforcing and retaining members (16, 14, 58) is provided of substantially U-shaped configuration when viewed in axial cross-section, thus forming first and second wall portions (26, 27; 47, 67; 59) as well as a base portion interconnecting said wall portions.

Abstract: A two part high vacuum gate valve construction includes a control mechanism part having a limited displacement stem passing through a first generally rectangular high vacuum flange and a valve body part including a generally rectangular case, a second generally rectangular high vacuum joint providing flange having a mirror image sealing geometry to the first high vacuum flange, two machined fluid flow flanges passing through openings defined through opposite sidewalls of said case and sealed thereto, at least one of the fluid flow flanges having an inside gate sealing surface machined prior to insertion through and sealing of the flange to the sidewall of the case; a two part, levered carriage having a central transverse pivot joint and having an endwall engagement mechanism for causing the pivot joint to pivot toward the inside gate sealing surface of the one flow flange in response to continued actuation force supplied by the control stem shaft after an inside endwall of said case has been contacted; a valv

Abstract: A piston ring assembly wherein a piston member operating within a cylinder is lubricated by means of gas rather than oil films or solid lubricants. One ring (located near the lower end of piston) or two rings (one located near the lower end and the other near the top end of piston) trap gas between the piston and the cylinder wall to form a gas bearing area. The rings are designed to permit gas flow in one direction into the gas bearing area.

Abstract: A compound seal for affecting a seal on a translating shaft movable within a sleeve to separate high pressure and low pressure zones. The compound seal includes a sealing member and a clamping member disposed in a groove formed in one of the elements. The sealing member defines sealing sides which cooperate with one of the sides of the grooves and with the other of the elements. The clamping member cooperates with the bottom and the high pressure side of the groove, and with the sealing member so as to exert a force thereon extending substantially along the bisector of an angle defined by the sealing sides.