Abstract: The invention concerns a bellows (2) comprising a bellows body (10) provided at each end with a lug (12) designed to provide sealed contact with the periphery of a shaft or an element (7) of the joint integral with a shaft. Each lug (12) comprises a radially outer shoulder (16) providing transition between the lug (12) and the bellows body (10), and a support surface (20) designed to receive a member (22) such as a ring or a clamp, for tightly fixing the lug against the shaft or the associated element. The support surface (20) extends from the shoulder (16) and extends further up to the end of the lug (12) without any increase in diameter. The shoulder (16) is adapted to form a longitudinal positioning stop when the fixing member (22) is mounted. The invention is applicable to bellows with lugs fixed by swage-crimping of a closed ring.

Abstract: A package comprising gasket mounting clamps and instructions for mounting same. The mounting clamps include an expansion clamp and a takedown clamp. The expansion clamp engages an interior of a gasket inserted. The takedown clamp is looped in the gasket. The takedown clamp is urged against surface of either the expansion clamp or the gasket. A flexible fastener loops through the expansion clamp and around the takedown clamp passing through an opening in an instruction card retaining the card and takedown clamp within the gasket. The expansion clamp enables installation of gasket and expansion of the clamp without removing the fastener and without interference of the takedown clamp, fastener and card and permits observation of the card. The fastener loops through the expansion clamp and does not interfere with the expansion operation. The fastener remains intact until mounting a pipe to the gasket, assuring retention of the takedown clamp and instructions.

Abstract: A ball joint includes a socket and a stud having a ball end portion received in the socket and a shank projecting from the socket. An annular seal has an intermediate portion extending between first and second end portions. The second end portion of the seal has an engagement portion in sealing engagement with the shank portion of the stud. A spring is molded in the second end portion of the seal and extends for 360 degrees around the circumference of the shank portion at a location radially outward of the engagement portion. The spring has a circular array of spring fingers that extend radially inward from a main body portion and exert a radially inward directed force on the engagement portion to maintain it in sealing engagement with the shank portion.

Abstract: A seal for preventing leakage of fluid from an opening (42) formed in a side wall (41) of a work tank (40) of a wire electric discharge machine comprises a slide plate (1) movable with respect to the work tank for closing the opening, and a rail member (22) attached to the work tank for guiding movements of the slide plate. The slide plate gas a waterproof thin flexible strip (13) and a number of rigid blocks (11, 12) attached to the flexible strip and arranged in a row so as to engage with each other at the edges. The rigid block gas a convex edge (111) and a concave edge (112) complementary to the convex edge. A method of forming the seal is also disclosed.

Abstract: A ball joint comprises an elastomeric sealing cover and a metal straining ring for fixing the sealing cover in the ball joint. First end of the sealing cover is coupled to an external face of a ball joint box, thus defining a sealing ring, and second end of the sealing cover is coupled to a body of a pin of the ball joint. The sealing cover includes a sealing lip formed at the first end thereof. The straining ring has an internal flap mounted by interference fitting on the external face of the ball joint box, and an external flap. During the assembly of the ball joint, the external flap of the straining ring is bend over the sealing lip of the sealing cover for engaging the sealing lip and providing sealing to the ball joint and fastening the sealing cover to the ball joint box.

Abstract: A gasket for use in a cylindrical alkaline-manganese dioxide cell is molded by injecting a molten resin into a mold assembly having a male mold having an injection gate formed in a cylindrical space and a projection formed in a narrow space and of which a side facing the cylindrical space is chamfered or curved, and a female mold having at least any one of an eject sleeve or ejection pin. The gasket is used to seal an opening of a can of the cylindrical alkaline-manganese dioxide cell. In the gasket, the boundary between a thin portion and hob portion thereof is chamfered or curved and the boundary between the thin and diaphragm portions is formed like a generally vertical edge.

Abstract: A gasket includes a fist sealing portion, a second sealing portion, and an elastic arm sealingly connecting between the two. The first sealing portion sealingly engages a first member and the second sealing portion sealingly engages a second member. The elastic arm is not highly compressed between the members, allowing the gasket to vibrationally decouple the first member from the second member.

Abstract: A middle portion 62 of a fitting portion 52A of a boot 52 for a universal joint is fastened to a flange-like portion 72 of a member to which the boot is attached and a front end portion 63 to which communicating paths 61A to 63A of the boot 52 are opened is faced to a small diameter periphery portion 73 following one side of the flange-like portion 72 of the member to which the boot is attached.

Abstract: A grommet has a plurality of projecting strip portions provided on an outer peripheral surface of a tapered portion, extending in an axial direction of the tapered portion and being spaced from each other in a circumferential direction. The grommet also has a plurality of grooves on the outer projecting strip portions. The grooves extend in the circumferential direction, and are configured to generate tactile sensation when the grommet is mounted into the through hole of the automobile body panel.

Abstract: In a joint boot made of a resin comprising a large-diameter cylinder part at its one end and a small-diameter cylinder part coaxial with the large-diameter cylinder part at its other end, and a bellows part linking both parts integrally, a shoulder portion of the large-diameter cylinder part joining to the bellows part is contoured to slant in a taper form toward the small-diameter cylinder part. A taper angle of the shoulder portion is preferably 6 to 15 degrees. Thereby when the boot is deformed to bend in a wide angle, the overhanging deformation of the shoulder portion on the inward bend side is restrained and the durability is remarkably enhanced.

Abstract: 1.

Abstract: A constant velocity joint boot includes a bellowed portion and the first crest portion of the bellowed portion is formed to have the same outer diameter as the first cylindrical portion, and the length of the membrane extending from the first crest portion through the second root portion to the second crest portion is set to be almost the same as that extending from the second crest portion through the third root portion to the third crest portion, and the depth of the second root portion h and the depth of the third root portion H satisfy a relational expression H/1.3≦h≦H/1.1.

Abstract: A sealing boot for a rack and pinion steering system includes a tubular body structure of flexible seal material formed with a plurality of convolutes and terminating at each open end in a neck. An inner sealing surface of at lease one of the necks is formed with a plurality of annular, alternating grooves and ribs, which reduces the contact area of the sealing surface and provides annular pockets for retaining lubricant at the sealing surface to provide low frictional resistance to the rotation of the component about which the neck is sealed relative to the boot.

Abstract: A protective cover particularly adapted for a piston having a piston rod and a cylinder is disclosed. The cover is a trapezoid-shaped dual layer fabric with either elastic or drawstring tie fasteners or a combination of both at the opposite parallel edges, and complementary closure fasteners, such as plastic loop and pile strips, along the angled sides. The trapezoid-shaped fabric is wrapped around the portion of the piston cylinder from which the piston rod extends and the fastener strips are engaged. The tie fasteners are tightened around the adjacent part of the piston rod and part of the cylinder to completely enclose this portions of the piston. As the rod reciprocates in and out of the cylinder, the fabric protects the adjacent piston rod and cylinder head from dirt and debris, and acts to polish the piston rod as it reciprocates in and out of the cylinder head.

Abstract: The invention relates to a case seal (6) for cross-divided crank cases, comprising an upper section (1) and a lower shell (2) (see figure). Both halves of the crank case have bearing seats (3, 4) for bearing (5) a shaft. The inventive case seal (6) is characterized in that it is configured as a single-piece elastic shaped part which can be placed on one half of a crank case along the sealing surfaces (7, 8) and the bearing seats (3, 4). Preferably, the case seal also consists of a second elastic shaped part (11) which can be inserted into the bearing seat (3) of the second half (1) of the crank case that is not provided with the first sealing part (6).

Abstract: A sealing apparatus 20 is provided with an annular elastic member 21 and a reinforcing member 23 to which the elastic member 21 is securely fixed, and is attached to an annular stepped portion 12b of a cylindrical member 12. The elastic member 21 has a sealing portion coming into contact with the inner surface of the stepped portion 12b of the cylindrical member 12 and the inner periphery surface of a large cylinder portion 12c in an airtight manner. Further, the sealing apparatus 20 has a holding portion including a cylinder portion 24 press-inserted into the inner periphery of the small cylinder portion 12a of the cylindrical member 12; and an elastic outer cylinder portion 25.

Abstract: In a mounting structure of a boot (15), a communication passage (21) communicating a connection space (13) with an external portion can be formed in a base portion (14A) of a boot adapter (14) at least at an intermediate stage of being inserted and attached to an outer peripheral portion of a first member (an outer wheel (11A)) from an axial direction, and the connection space (13) can be sealed by shutting a communication by the communication passage (21) at least at a final stage of the insertion and attachment.

Abstract: In order to provide watertight properties between a spring socket (1) and a release socket (2) for a plug of a push-pull connector, a bellows expansion joint (5) is provided between the spring and release sockets. When the two sockets are spaced apart, the bellows expansion joint is in the rest (non-stressed) position. When the release socket is driven closer to the spring socket, a stress is exerted on the bellows expansion joint (6, 7). This helps to force back the release socket. By this structure, improvements are shown in the vibration resistance and, at the same time, in the watertightness of the plug of a push-pull connector.

Abstract: A corrosion-protected modular unit is disclosed with two components, of which a first metallic component exhibits a socket opening, into which a second component is capable of being inserted at least partially, and the second component is endowed with a sealing element which interacts via an abutment face with the surface of the first component. An anticorrosive element (5) is applied in firmly adherent manner on the surface of the first component between the abutment face (1) of the sealing element (2) and the surface (3) of the first component (4). The process includes the application of a surface-protection layer on the first metallic component (4), machining of a surface region (3.1) of the surface (3) of the first component (4), insertion of a mounting pin (10) into the socket opening (6) of the first component (4), adhesive bonding of the anticorrosive element (5) onto the prepared surface region (3.

Abstract: A rolling boot for sealing a universal joint, having a first collar with a larger diameter to be secured to the outer joint part of the universal joint and having a second collar with a smaller diameter to be secured to a shaft at the inner joint part of the universal joint, and having a semi-toroidal boot wall connecting the collars, wherein the rolling boot is an injection-moulded or blow-moulded product, the rolling boot consists of a thermo-plastic elastomer and the elastomer is irreversibly cross-linked up to a degree ranging between 15 and 85%.

Abstract: A vacuum pipe for a part which is mounted so as to be movable and projects from outside a vacuum chamber into a vacuum in the vacuum chamber, comprises an opening in a wall of the vacuum chamber limiting the vacuum, with an inner side facing the vacuum and an outer side at which is provided an annular sealing surface surrounding the opening, an annular sealing surface at the part projecting through the opening into the vacuum from outside the vacuum, a sealing arrangement which is provided between the annular sealing surfaces of the wall and of the part and which comprises at least one sealing ring of elastic material, and a guide device which guides the part relative to the wall and by which at least a minimum axial pressing force is maintained on the at least one sealing ring in every position of the part, resulting in a deformation of the at least one sealing ring such that tightness is ensured, wherein the deformation of the sealing ring changes at least in areas of the sealing ring when the part moves re

Abstract: A straining ring for ball joint constituted of a sealing cover made of rubber with opening in the two ends, being one of bigger diameter to be coupled to the external part of the ball joint box, where it is provided the ring object of this invention, denominated sealing ring, and one of smaller diameter to be coupled to the body of the pin of ball end.

Abstract: A joint for a shaft assembly includes a housing fitted with a boot seal that encircles and seals about a stub end of a shaft extending into the housing. The boot seal has a collar-like neck portion whose inner surface is formed with an annular wiper rib. Prior to assembly with the shaft, a shipping plus is disposed in the neck of the seal to guard against the escape of grease and the ingress of contaminants. The wiper rib of the seal is operative to engage and wipe grease from the inserted shank of the shipping plug upon its removal to prevent the grease from accumulating in the neck region and impairing the performance of the seal.

Abstract: The present invention resides in a boot seal for use in sealing a joint. The joint comprises first and second relatively movable parts. The boot seal is configured in the form of a sleeve to extend between and around the vehicle relatively movable parts. The sleeve has a laminate wall which comprises at least two layers of thermoplastic elastomeric material which are bonded together. At least one of the layers is a stretch-toughenable polyester thermoplastic elastomer which has been diametrically stretched in an amount effective to increase the toughness of said one layer. The laminate wall has a percent elongation to rupture of at least 100, and a flexural modulus which is less than 100,000 psi. The laminate wall preferably has a puncture resistance of at least 50 Newtons/mm wall thickness.

Abstract: A protective bellows formed by injection (blow) moulding has a large-diameter end with a fixing collar (28) for sealingly embracing an externally tri-lobed surface of a housing of an articulation joint for a motor vehicle transmission. The fixing collar (28) comprises a circumferential outer surface 29 and an inner surface (30). The inner surface (30) is made up of part-circumferentially curved surface portions (30A, 30B, 30C) for engaging the three lobes of the housing, and three equi-angularly spaced inwardly curved integral surface portions (32A, 32B, 32C) which are shaped to engage the spaces or grooves between the three lobes on the housing. The resilient material between the outer surface (29) and each inwardly curved surface portion (32A, 32B, 32C) is formed with several slots (34) arranged with their depths directed in a radial direction. The slots (34) aid the de-moulding process.

Abstract: A corrosion resistant gasket for aircraft, and more particularly to encapsulation of a conductive mesh in a pliable fluorosilicone compound that will not become bonded to mating surfaces and will also migrate upon compression during installation to the threads of attaching hardware utilized between the instrument, antenna, and aircraft structure, thereby reducing corrosion through the attaching hardware, by providing a hermetic seal around the periphery of the envelope of the attached device.

Abstract: A tool for installing a boot seal assembly having a boot seal and a clamp structure. The boot seal is formed from a resilient elastomeric material and includes a sealing lip and an annular groove. The clamp structure is disposed in the annular groove and is positionable between an uncompressed state and a compressed state. Placement of the clamp structure in the compressed state causes a radially directed clamp force to be exerted onto the boot seal to bring the sealing lip into contact with a sealing surface of a structure to be sealed. The tool includes a clip structure coupled to at least one of the boot seal and the clamp structure. The clip structure includes an axially projecting portion that extends radially inward of and axially across the sealing lip.

Abstract: A sealing arrangement for a rotatable shaft guided through an opening and having a profiled surface section includes an elastic cuff mounted at the opening and surrounding the shaft. The cuff abuts the shaft through a supporting ring. An elastic sealing jacket is connected internally with the supporting ring, thereby mounting the elastic sealing jacket non-rotatably on the shaft. The supporting ring has an external cylindrical sliding surface on which the elastic cuff is mounted.

Abstract: An apparatus (10) includes a bearing (24) linking first and second vehicle parts (12, 14) for movement relative to each other, and a boot seal (30) protecting the bearing (24). The boot seal (30) is a tube of heat shrinkable thermoplastic material. The tube (30) has a first end portion (34) shrunken against the first vehicle part (12), a second end portion (42) shrunken against the second vehicle part (14), and a flexible intermediate portion (44) which is deflectable between the opposite end portions (34, 40) upon movement of the vehicle parts (12, 14) relative to each other.

Abstract: In a windshield wiper drive assembly having a pivot shaft and housing for passage through an aperture formed in a panel of a vehicle, a seal is provided formed as a unitary one-piece cap and seal body. The one-piece body has a cap with a longitudinally extending aperture engageable at one end with the housing and at another end with the pivot shaft. An integrally formed seal portion is provided to be engaged with the panel of the vehicle after installation. The cap has an enlarged portion for snap-fit with respect to the housing, and a reduced portion for sealing engagement with the pivot shaft. The sealed portion extends radially and longitudinally from an inner edge adjacent an outer longitudinal edge of the enlarged portion of the cap toward an outer edge adjacent an outer longitudinal edge of the reduced portion of the cap. The seal portion can extend beyond the outer longitudinal edge of the reduced portion of the cap.

Abstract: An elastic sealing element in the form of bellows, which is used to seal the contact surface between at least two components movable in relation to one another is described, which has low-elasticity contact zones as well as a deformation zone whose elasticity is higher than that of the contact zones, wherein the said deformation zone defines a chamber for accommodating lubricants on its inner side facing the movable components. An overpressure relief means (14) is arranged at least in the area of one of the two low-elasticity contact zones (6 or 7). The overpressure relief means (14) has at least one relief opening (15) connecting the lubricant chamber (11) with the outside of the sealing element (1) and a closing element (16) covering the said relief opening. The closing element (16) is in turn made in one piece with the sealing element (1) and closes the relief opening (15) up to an overpressure limit in the lubricant chamber (11) due to the intrinsic elasticity of the material of the sealing element.

Abstract: Plug means for closing holes in the body of vehicles, whereby it comprises valve means having a valve member which normally is biased towards a sealing edge and which opens if a predetermined pressure drop between the interior of the body and the exterior thereof occurs.

Abstract: A mounting device for mounting a valve on a container and a dispenser containing a product under pressure fitted with such a mounting device are both provided. The mounting device includes: a first fastening device configured to fasten the mounting device to an open edge of the container; a second fastening device configured to fasten the dispensing valve on the mounting device; a first groove formed between the first and second fastening devices; and a locking device intended to be positioned in the first groove so as to allow the first fastening device to be clamped onto the open edge, wherein the action of clamping is a result of radial enlargement of a bottom of the first groove.

Abstract: A coextruded valve stem seal is provided that includes a sleeve having an upper and lower portion, a central vertical axis, and a generally concentric aperture. The sleeve includes an inner layer an inner layer of a resilient sealing material, such as a rubber, and an outer layer of a coextrudable rigid material, such as a plastic material. The lower portion of a preferred embodiment of the sleeve may include a radially extending flange. A method for making the valve stem seal in accordance with the principles of the invention is also disclosed.

Abstract: A spray gun configured with a roiling wall diaphragm piston and vented piston cylinder connecting the needle to the needle actuator and isolating the liquid chamber of the nozzle body from the actuator section. The flange of the rolling wall diaphragm is sealed between the mating faces of the nozzle body housing and the actuator housing. The actuator is a double action air operated piston and cylinder. Sanitary, non-threaded quick disconnect couplings are used between the several components of the spray gun for easy cleaning and servicing of the nozzle body, tip and needle, and easy replacement of the rolling wall diaphragm.

Abstract: A sealing device for explosion-proof motors, the particularity of which is the fact that it comprises a first element which is coupled to the motor casing and a second element which is coupled to the driving shaft through rolling means; the first and second elements are mutually coupled through elastic elements to allow their relative movement.

Abstract: A mechanical duty bellows seal is constructed from a number of annular rubber diaphragms of comparatively thick cross-section alternately bonded to a series of outer and inner metal hoops so that the hoops hold the rubber diaphragms in simple shear during flexure of the bellows. The stresses in the rubber in shear are predictable thus allowing the calculation of diaphragm proportions to control stress levels.

Abstract: An apparatus (10) includes a bearing (24) linking first and second vehicle parts (12, 14) for movement relative to each other, and a boot seal (30) protecting the bearing (24). The boot seal (30) is a tube of heat shrinkable thermoplastic material. The tube (30) has a first end portion (34) shrunken against the first vehicle part (12), a second end portion (42) shrunken against the second vehicle part (14), and a flexible intermediate portion (44) which is deflectable between the opposite end portions (34, 40) upon movement of the vehicle parts (12, 14) relative to each other.

Abstract: A boot and attaching frame assembly for closing an opening in a wall of a steering column shroud through which a gear shift lever extends. The assembly includes a flexible boot having a central portion provided with a passage adapted to receive the gear shift lever. A marginal position of the boot is folded inwardly upon itself to provide a terminal flange and to form a laterally inwardly opening groove. The terminal flange is adapted to engage an outer annular surface portion of the wall of the shroud around the opening therein. The assembly also includes an annular frame for securing the boot to the shroud. The frame has an annular base adapted to fit within the opening in the wall of the shroud. The frame has inner retainer tabs extending laterally outwardly from the base to engage an inner surface portion of the wall of the shroud around the opening therein. The frame has an outer retainer flange extending laterally outwardly from the base into the groove in the boot.

Abstract: An improved bellows assembly (18) is provided for use in, for example, an ion implanter (10). The bellows assembly comprises a first mounting portion (56) located at one end of the bellows assembly for fixedly mounting the bellows assembly to a first vacuum chamber (16); a second mounting portion (54) located at an opposite end of the bellows assembly for slidably mounting the bellows assembly to a second vacuum chamber (15); and a steel bellows (60) located between the first and second mounting portions. The bellows extends generally along a longitudinal axis (64) and is expansible and contractible along this axis. The second mounting portion permits radial slidable movement of the bellows assembly with respect to the second chamber in a first plane substantially perpendicular to this axis.

Abstract: A protective gaiter fits around a lubricated joint such as a vehicle constant velocity joint. The gaiter is in the form of a generally conical rubber tube (10) having stepped configurations at its wider end so that it can be cut down to fit different diameters of joint members. The stepped configurations have seating areas (23 or 40-42) for a fixing strap (49) and there are flexible transitions between these areas to enable the gaiter to flex and pivot. In one embodiment the flexible transitions are inwardly directed folds (24). In a second embodiment the seating areas (41, 42) are inclined inwardly and the flexible transitions are defined by angular joints with radial linking walls (43-45).

Abstract: A bellows-type cover into which a clamping member is adapted to be securely integrated to form a preassembled unit; the groove-shaped recess near one end of the bellows-type cover adapted to receive the clamping member has a two-tier positioning arrangement with a radially inward, circumferentially extending bottom surface for engagement by the clamping member when fully tightened and with a temporary bottom for the clamping member to provide a releasable self-retaining support for the closed, but not yet fully tightened clamping member at a radial distance between the bottom surface and the radially outer limit of the recess.

Abstract: In a boot for a universal joint in which a fitting portion is installed at one end side in an axial direction of a bellows portion on an outer ring portion of the universal joint by the clamp and a relief portion is provided between the bellows portion and the fitting portion on purpose to lower interference between each of the bellows and to relieve a contact of the bellows portion against the shaft in the case when being bent at a sharp angle. This prevents the relief portion from interfering with the tightly clamping portion of the clamp. The relief portion is designed to be arranged apart from the clamp by providing the spacer portion with the predetermined length in the axial direction between the fitting portion and the relief portion.

Abstract: A diaphragm weld assembly for preventing fluid leakage from a flange. The diaphragm weld assembly has a flange having a platform, the platform having an opening and an annular weld pocket concentric with the opening, a diaphragm resting on the platform and having a ring extending from the bottom face of the diaphragm, the ring engaging with the opening, a weld bead formed in the annular weld pocket and welding the diaphragm to the flange, and a flange cover fastened to the flange. A method of creating the diaphragm weld assembly is also provided.

Abstract: A bellows for encasing the connecting region of a tie bar of a motor vehicle is provided. The inner surface of the mounting collar is provided with projections that extend at an oblique angle to the axis of the mounting collar. Free spaces that remain next to and between the projections can be filled with a lubricant.

Abstract: A seal for a shut-off device moved in a rectilinear manner, which is switched from a closed to an open position and vice versa so as to shut off material flows. The seal is formed of metallic components which define a pressure chamber to which external pressure can be applied to achieve seal tightness. Employing only metallic components makes it possible to use the seal in a wide temperature range and under conditions of exceptional wear caused by either frequent actuation or the composition of the flowing medium. The sealing system includes a shut-off device (1) against which a movable seat (5) forms a seal. The seat is connected to the tubular casing (2) in a pressure tight manner, and the casing in turn is connected to a flange (3). The assembly is connected to a housing (8) by a flange (6) and is sealed by seal (7). Membranes (9, 10) and support plate (14) form a pressure chamber (11) to which pressure Ps is applied through connecting nipple (13) and bores (12).

Abstract: A male coupling portion of a first split portion on one side of a split boot is coupled to a female coupling portion of a second split portion using a plurality of spaced male and female coupling portions. A worker can simply couple the split portions of split boot without using any machine while enhancing the coupling force of split faces.

Abstract: A fluid pressure relief seal for preventing the ingress of fluid into a container and for venting fluid from the container is disclosed. The fluid pressure relief seal works in conjunction with a container having a receptacle and a lid. The receptacle has a mouth and at least one aperture in the receptacle for venting fluid from the container, while the lid covers the mouth and is engagable with the receptacle. The fluid pressure relief seal comprises a fluid-impermeable washer elastically stretched over an exterior of the receptacle and compressed between the lid and the receptacle when the lid and receptacle are engaged to prevent the passage of fluid into or out of the container. The fluid pressure relief seal also comprises a fluid-impermeable lip seamlessly molded with the washer and elastically stretched over the exterior of the receptacle and apertures in the receptacle for venting fluid from the container.

Abstract: A protective constant velocity (CV) joint boot having a tubular body with end openings and one longitudinal seam running from one end opening to the other enables rapid replacement of existing monolithic CV joint boots. Additionally, reinforcement of the tubular body of the protective boot against stresses caused by movement of the joint is accomplished through the use of a pair of sealing sleeves, also having seams, which are fitted under the tubular body of the protective boot. The edges of the seam of the tubular boot interlock with, as seen in cross section, an arrow head shaped male member on one edge of the seam which locks past a pair of nubs on a female retaining edge of the seam. The seams of the sleeves are off-set with the seam of the tubular body of the protective boot, thus accomplishing a more effective seal. Both sleeves have a flange that lends strength to the crests nearest the ends of the protective boot, which under most driving conditions receive more stress than the central portion.

Abstract: A process diaphragm seal includes a diaphragm seal body having a seal body ring portion surrounding a cavity and a diaphragm having a diaphragm ring portion. The diaphragm ring portion includes a diaphragm ring outer portion that corresponds to a seal body ring outer portion of the seal body ring portion and a diaphragm ring inner portion that corresponds to a seal body ring inner portion of the seal body ring portion. A first weld of the diaphragm ring outer portion to the seal body ring outer portion forms a closed path around the seal body ring portion. A second weld of the diaphragm ring inner portion to the seal body ring inner portion forms a closed path around the cavity. Between the first and second welds a diaphragm ring back surface is in substantially continuous contact with the seal body ring portion.