Abstract: An explosion-protected housing having a housing body, a frame part and at least two separate covers. The housing body delimits an interior space which is open at one side by means of a housing opening. The frame part has a circumferential web surrounding the housing opening. Extending within the circumferential web is a central web of the frame part that divides the housing opening into at least two opening portions. A cover abutment surface is formed, against which the covers bear in their closed position. An encirclingly closed flameproof gap is formed between each cover and the cover abutment surface when the cover is situated in the closed position and is detachably fastened by means of one or more connecting units to the frame part.

Abstract: A gasket includes an annular reinforcing ring formed around an axis, an annular base that is formed around the axis and that is formed from an elastic body into which the reinforcing ring is embedded, and an annular seal lip formed around the axis. The annular seal lip is disposed on an inner periphery side of the base and is integrated with the base. The seal lip includes one lip portion extending to the inner periphery side as progress toward one side in a direction of the axis and another seal lip portion extending to the inner periphery side as progress toward another side in the axis direction. A sum of a width of the base in a radial direction and a width of the seal lip in the radial direction is greater than a thickness of the base in the axis direction.

Abstract: A gasket, to be installed between a first housing and a second housing, includes a first loop-shaped portion in a loop shape, a second loop-shaped portion in a loop shape that is positioned at a radially inner side of the first loop-shaped portion, with a first gap between the first loop-shaped portion and the second loop-shaped portion, and a first connector portion connecting the first loop-shaped portion and the second loop-shaped portion in a part of the first gap.

Abstract: A seal arrangement for a fluid valve has: a first sealing element configured to bear sealingly against a valve housing of the fluid valve; a second sealing element configured to bear sealingly against an adjustable, rotatable, valve body of the fluid valve; and an elastically deformable intermediate piece arranged, axially, between a first wall of the first sealing element, which faces the second sealing element, and a second wall of the second sealing element, which faces the first sealing element, so as to elastically space apart the first and second sealing elements. In at least one axial portion of the intermediate piece, an axial cross section of the intermediate piece has a first radial lateral surface and an opposite second radial lateral surface. The first radial lateral surface is convex and the second radial lateral surface is concave, planar or less convex than the first radial lateral surface.

Abstract: A friction fit seal provides enhanced stability and installation as compared to conventional configurations. The seal includes a seal body having a longitudinal axis; a retention rib that extends from the seal body in a lateral direction perpendicular to the longitudinal axis; and at least one stabilizer rib that extends from the seal body in the lateral direction and is spaced apart from the retention rib along the longitudinal axis. A lateral width of the stabilizer rib in the lateral direction is smaller than a lateral width of the retention rib. The seal may be a keyhole seal in which the seal body includes an inner surface and an outer surface, and the inner surface defines a hollow center that may be keyhole shaped. The seal may include a solid central main body, and the stabilizer ribs and the retention rib are configured as lobes that extend in the lateral direction from the solid central main body.

Abstract: An annular dual barrier seal includes a pair of axially extending inner seal lips and a pair of axially extending outer seal lips, the pair of inner seal lips are connected to the pair of outer seal lips by a radially outwardly extending web portion. The pair of inner seal lips extend axially by a first dimension and the pair of outer seal lips extend axially by a second dimension which is greater than the first dimension. The pair of inner seal lips have a sealing surface that is one of partially toroidal and partially elliptical and that engage the radially inwardly facing first sealing surface and the pair of outer seal lips have a sealing surface that is one of partially toroidal, partially elliptical and conical.

Abstract: A housing unit of a Roots pump includes a rotor housing, which includes a peripheral wall, and a cover member, which closes an opening of the rotor housing. At least one of a mating surface of the peripheral wall or a mating surface of the cover member includes an annular first groove accommodating a seal member. The rotor housing includes a bulging portion including a second groove. The seal member incudes first projections, which project from an annular seal body, and a second projection, which projects further radially inward from the seal body than the first projections. Each first projection includes a distal end that contacts a side surface on a radially inner side or on a radially outer side of the first groove. The second projection is arranged in the second groove to determine the position of the seal body in the first groove.

Abstract: A seal member includes pushing projections that project from a seal body toward at a groove inner-side circumferential surface and are arranged at intervals in a circumferential direction of the seal body. The pushing projections push the seal body against the groove inner-side circumferential surface and a groove outer-side circumferential surface between the groove inner-side circumferential surface and the groove outer-side circumferential surface. This reduces the gap between the groove outer-side circumferential surface and the seal member in the seal accommodating groove. Thus, salt water is unlikely to collect in the gap between the groove outer-side circumferential surface of the seal accommodating groove and the seal member. This improves the corrosion resistance of the housing and the seal member.

Abstract: A low-spread metal ring gasket includes a lower ring gasket portion having a bottom surface and an upper ring gasket portion having an upper surface. The lower ring gasket portion includes at least one ring gasket sealing surface extending upward from the bottom surface, and the upper ring gasket portion includes at least one sealing bump protruding upward form the upper surface.

Abstract: An annular gasket for use between facing flanges of two flow conduit sections, the gasket including an annular gasket substrate made of polytetrafluoroethylene and having a first face opposite a second face. The first face includes a plurality of first serrations wherein the plurality of first serrations includes a plurality of first grooves and a plurality of first peaks, and the second face includes a plurality of second serrations wherein the plurality of second serrations includes a plurality of second grooves and a plurality of second peaks. The plurality of first peaks is aligned with the plurality of second peaks. The plurality of first peaks and the plurality of second peaks are compressible to a substantially flat surface when the conduit sections are joined together in a bolted configuration. An outer guide ring may be positioned exteriorly to the annular gasket substrate.

Abstract: Provided are a soldering apparatus that allows a gasket to be easily attached to and detached from the soldering apparatus, and a method of fixing the gasket to the soldering apparatus. The soldering apparatus includes: a furnace body; a gasket that is provided to at least a part of the furnace body, and that seals the furnace body; and a push rivet that fixes the gasket in an attachable/detachable manner to the furnace body.

Abstract: A split door submersible housing for an electrical distribution system includes a cabinet body defining an interior region configured to accept a component of the electrical distribution system, and a first door and a second door positioned side by side to cover an open front portion of the cabinet body. The cabinet body includes at least one opening configured to accept an electrode sealed with and electrically isolated from the cabinet body and extending through the cabinet body to establish electrical connection between a corresponding terminal of the component and an electrical distribution network. A gasket system is provided, which comprises a first gasket configured to fit on the first door and a second gasket configured to fit on the second door. The gasket system seals the first door and the second door against each other and against a corresponding surface on the cabinet body, when the first and second doors are closed and locked, so that the housing is water tight.

Abstract: A heat exchanger includes a shell. A tubesheet is mounted to the shell. A plurality of tubes extend from the tubesheet and into the shell for heat exchange between a first fluid within the tubes and a second fluid in the shell outside the tubes. The tubesheet divides an interior of the shell into a heat exchange chamber where the tubes can exchange heat with the second fluid, an inlet-outlet chamber for the first fluid to enter and exit the tubes. A breech lock locks the tubesheet within the shell. A bi-directionally self-energizing gasket is seated between the tubesheet and the shell to seal the heat exchange chamber from the inlet-outlet chamber. The gasket is configured to be self-energizing to seal regardless of whether there is a higher pressure in the heat exchange chamber or in the inlet-outlet chamber.

Abstract: The present invention relates to a resilient seal for sealing one or more gaps or joints. The seal includes an elongate strip having first and second portions. The first portion is configured in use to engage one or more internal surfaces defining the gaps or joints. The second portion is configured to substantially conform to the shape and configuration of the one or more gaps or joints so as to substantially fill the one or more gaps or joints when in use. The invention also relates to a method of sealing one or more gaps or joints using the resilient seal.

Abstract: To fulfill a sealing function for a fluid within a short period of time when a pump configured to pressure-feed the fluid is activated, provided are a seal ring, including: a first side surface (20); a second side surface (30) being a side surface on a side opposite to the first side surface (20); and a first side-surface side projecting portion (40) formed on the first side surface (20), in which a distal end portion (42) of the first side-surface side projecting portion (40) projects most toward an outward side from the first side surface (20) as compared to an entire surface of the first side surface (20) except for the distal end portion (42), and a sealing device using the same.

Abstract: The present invention provides a spring washer for a turbocharger including a stopper part formed at an inner periphery there and a line contact part formed at an outer periphery thereof, thus to prevent a spring repulsive force from being exerted thereto more than necessary even when exerting excessive compression and continuous compression force from peripheral parts, and prevent an inclination bent section from being flattened, thereby maintaining or improving restoring characteristics of the inclination bent section. The ring-shaped spring washer installed in a bypass valve of a turbocharger includes: an inner periphery having a stopper part fixed to a lower surface thereof with being overlapped therewith; an inclination bent section integrally formed with the inner periphery with being inclined downward; and an outer periphery having a line contact part integrally formed with the inclination bent section to be in line contact with a support of the spring washer.

Abstract: An packing has an annular shape. The packing includes: a plurality of first protruding portions that protrude in a direction of enlarging a diameter from an outer peripheral surface of the annular shape to be continuous along a circumference and are arranged in parallel in an axial direction; a plurality of second protruding portions that protrude in a direction of reducing a diameter from an inner peripheral surface of the annular shape to be continuous along a circumference and are arranged in parallel in the axial direction with a parallel width wider than a parallel width with which the first protruding portions are arranged; and axially-protruding portions that are provided positions to sandwich the first protruding portion and the second protruding portion from both sides in the axial direction and protrude in the axial direction from both ends in the axial direction of the first protruding portion.

Abstract: The present disclosure relates to a re-enterable enclosure for a fiber optic network. The enclosure can include features such as a low compression-force perimeter gasket, cable seals constructed to seal effectively seal triple points, multi-function port size reducer plugs and multi-function blind plugs.

Abstract: A spin-on filter for a filter device with a housing pot in which a filter element is arranged, a connecting body arranged at the housing port end face having a central opening and a fluid opening radially outwardly offset from central opening. A filter-side coupling part of a coupling device detachably couples the spin-on filter to a filter head. The coupling part can be detachably coupled to a connector of a head-side coupling part of the filter head by way of a plug-in and/or rotational movement with respect to a coupling axis. A inner seal is provided having a sealing surface which extends around the periphery of a centric fluid channel and is axially offset in relation to the filter-side coupling part toward the filter element. The circumferential sealing surface of the filter head-side fluid connector sealingly contacts to separate the dirty and clean sides.

Abstract: There is provided a structure capable of ensuring a bearing surface pressure on an inner diameter side and an outer diameter side of a washer even if a thickness of the washer is suppressed. In a washer used at a fastening portion of a vehicle, a configuration in which a bearing surface is sectionalized into two faces, an inner abutting face and an outer abutting face, by an annular groove is adopted.

Abstract: This invention relates to a technique for hermetically sealing an artificial leg including a cylinder device. A rod member of the cylinder device extends from the inside to the outside of a shell structure of the cylinder device. The rod member is hermetically sealed at the periphery thereof by a bellows packing member. The bellows packing member comprises an inner bead, an outer bead which concentrically surrounds the outside of the inner bead, and a bellows packing body part which connects the inner and outer beads. The bellows packing body part includes corrugations, and each corrugation is less curved than an imaginary circle which is concentric with the inner bead and the outer bead. Both ends of each of the plurality of corrugations extend to the outer bead or are located at positions closer to the outer bead than the inner bead.

Abstract: The invention relates to an environmentally sealed plug-in connector housing formed from a base body (2) having a fastening flange (10) molded thereon. The fastening flange (10) is associated with a sealing element (20) that is compressed in a sealing manner between the fastening flange (10) and an assembly surface (3). In order to ensure the sealing of fastening bores (11) provided in the fastening flange (10), sealing sleeves (21) are molded onto the sealing element (20), which sealing sleeves extend into the fastening bores (11) and at least completely pass through the latter. A fastening screw inserted into a fastening bore (11) can in this way seal with its screw head the fastening bore (11) by means of the sealing sleeve (21) that is compressed by the screw head.

Abstract: The invention relates to a sealing system consisting of a first part and a second part and at least a passage opening extending in both parts, in particular a passage opening for fluids such as hot combustion gases from combustion engines as well as a corresponding metallic flat gasket such that the sealing system comprises or consists of a first part and a second part with the first part and the second part being compressed against each other at a joint contact surface and comprising at least one passage opening in the contact surface, which protrudes into the first and/or second part, an annular groove, which is delimited by the first and the second part and which encircles the passage opening, with the first and second part in the area at least radially outside of the groove come to rest one on the other.

Abstract: A buildable seal assembly (100) is used with a jacket (102) which is connected to a sidewall (14) and slide out room (12) of a conventional RV or similar mobile equipment or mobile living quarters (10). A right angled seal element (132) is coupled to the jacket (102) in a snap in configuration. The right angled seal element (132) is further coupled to a bulb (152) and a wiper component (146). The bulb (152) and wiper component (146) assist in providing a seal between the mobile living quarters (10) and the slide out room (12) when the room (12) is in a retracted, closed position or an extended, open position.

Abstract: Embodiments of the present invention generally relate to a support ring for supporting a substrate during thermal processing in a process chamber. The support ring generally includes a ring body, an outer rib extending from a first surface of the ring body, a midrib extending from the first surface of the ring body, and a substrate support extending from a second surface of the ring body. The support ring reduces thermal coupling between a substrate and the support ring.

Abstract: A seal structure has one metal gasket arranged between a pair of casings. The metal gasket is provided with a planate outer peripheral portion and a bead portion which is formed by rising up from an inner peripheral end portion of the outer peripheral portion, and is arranged so that the bead portion comes into contact with the one casing, and the outer peripheral portion comes into contact with the other casing. The bead portion elastically deforms so as to reduce its height and the outer peripheral portion elastically deforms on the basis of the elastic deformation of the bead portion, when the metal gasket is pinched by the pair of casings, and a leading end of the outer peripheral portion comes into contact with one casing at this time, whereby any gap in which salt water stays is not formed between one casing and the metal gasket.

Abstract: The invention relates to a jet regulator (1) with a sleeve-shaped jet regulator housing (2), which (2) can be mounted on the water outlet of a plumbing outlet armature, and with a sealing ring (5) made of elastic material, which (5) seals in an axial direction against an adjoining annular flange at the water outlet of the outlet fixture. On the front inner peripheral area (6) of the jet regulator housing (2) on the inflow side, there is provided at least one housing undercut (7), which secures, on the jet regulator housing (2), the sealing ring (5), inserted into the housing interior (8) of the jet controller housing (2). In the jet controller (1) according to the invention, the sealing ring (5) is effectively secured against unintended loss, for example, during transport or storage.

Abstract: A joint filling strip has a uniform cross-section along its length that defines a top portion and a shaft portion coupled to the top portion. The top portion includes a rectangular section. The shaft portion includes at least one pair of opposing fins spanning a distance that is greater than a width of the rectangular section.

Abstract: A waterproof gasket for a small size electronic appliance of the invention has straight portions (1A) and corner portions (1B) alternately in a peripheral direction, a main seal portion (11) and a seat seal portion (12) brought into close contact with a bottom surface of a gasket retention groove are formed, a shoulder portion (13) protruding in a width direction between said main seal portion (11) and the seat seal portion (12) so as to be brought into close contact with an inner side surface of a groove shoulder of said gasket retention groove is formed in said straight portion (1A), and a recession portion (14) retracting in a width direction relatively from said shoulder portion (13) between said main seal portion (11) and the seat seal portion (12) is formed in said corner portion (1B). Accordingly, a partial compression reaction force increase is prevented in the corner portion.

Abstract: A formation tester seal pad includes a support member and a deformable seal pad element including an outer sealing surface having a plurality of raised portions and adjacent spaces. In some embodiments, the raised portions are deformable into the adjacent spaces in response to a compressive load on the outer sealing surface. In some embodiments, the support member includes an inner raised edge and an outer raised edge to capture the deformable seal pad element. In some embodiments, a deformable seal pad element includes a volume of seal pad material above a support member outer profile and a volume of space below the outer profile. In some embodiments, the space volume receives a portion of the seal pad volume in response to a compressive load.

Abstract: A gasket is provided which is intended to improve its sealing performance by attaining a further stabilization of the posture thereof in a groove.

Abstract: A strip seal and method of configuration thereof for sealing portions of components of a gas turbine exposed to pressure pulsations. The strip seal has a sealing face that is configured to follow the contours of first portions of the components. The strip seal further has a pressure face that has a sinusoidal curvilinear shape with respect to the sealing face. The pressure face is configured to prevent localized movement of strip seal by configuring pressure face on its first side to contact sealing face at a plurality of points, on its second side to contact second portions of the components at a plurality of points.

Abstract: A seal assembly located at the intersection of an extension room and wall of a recreation vehicle, the seal assembly having a flap seal, a bulb snap-in member attached to the flap seal, and a bulb seal member attachable to the bulb snap-in member in a snap-fit manner. The bulb seal member may be attached to the bulb snap-in member by a living hinge. The flap seal may be made removable from the bulb snap-in member. Two flap seals may be used to attach to either side of the recreation vehicle wall. The two flap seals may be connectable with each other and adjustable via a longitudinal mating shaft on one flap seal and a longitudinal mating shaft receiving member on the second flap seal. The seal assembly may be manufactured by a multi-extrusion process so that various components can be made of different materials, such as different types of plastic.

Abstract: A seal assembly 10,110 for sealing between a first member 12,112 and a second member 14,114 of a joint, the first member 12,112 being able to pivot about an axis 60,160 of the joint relative to the second member 12,112, is disclosed. The seal assembly 10,110 includes an annular seal body 30,130 which has a sufficient axial dimension X,XX to span first and second seal cavities 20,120,22,122 of the first member 12,112 and second member 14,114 of a joint.

Abstract: An expandable seal features a ring structure with internal and external seal. The seals are mounted in grooves and extend beyond a base outer dimension on the ring on the inside and the outside surfaces. Bumps are positioned in axial alignment with the seals but in opposition to each seal so that the exterior seal has a bump axially aligned but on the inside of the ring and the inner seal has a bump axially aligned and on the outside surface of said ring. The bumps have end transitions to the base dimension to create a volume for the seal material to travel axially when radially expanded from a mandrel extending within for effective seal containment. Seal rings can be stacked to adjust to dimensional irregularities in the surrounding tubular or the mandrel and to back each other up in the event of seal failure in any one seal ring.

Abstract: A seal assembly located at the intersection of an extension room and wall of a recreation vehicle, the seal assembly having a flap seal, a bulb snap-in member attached to the flap seal, and a bulb seal member attachable to the bulb snap-in member in a snap-fit manner. The bulb seal member may be attached to the bulb snap-in member by a living hinge. The flap seal may be made removable from the bulb snap-in member. Two flap seals may be used to attach to either side of the recreation vehicle wall. The two flap seals may be connectable with each other and adjustable via a longitudinal mating shaft on one flap seal and a longitudinal mating shaft receiving member on the second flap seal. The seal assembly may be manufactured by a multi-extrusion process so that various components can be made of different materials, such as different types of plastic.

Abstract: The present disclosure provides substrates having a lubricious coating thereon. The substrate may be flexible and include, in embodiments, a medical device. The lubricious coating, in embodiments, is applied in a pattern so that the coating avoids delamination and/or fracturing which might otherwise occur as the substrate flexes and/or stretches.

Abstract: An EMI shielding gasket having enhanced corrosion protection and force deflection is provided. The gasket has a body formed from an electrically conductive material with outwardly extending projections from one or both surface portions thereof. A non-conductive polymer gel is applied to the spaces between the projections for protection against corrosion. The gasket is particularly adapted for use in external aluminum aircraft surfaces which are exposed to harsh environmental conditions.

Abstract: A tank connection includes a tank formed with a plastic wall having multiple thicknesses, a first thickness being substantially impervious to hydrocarbon permeation, the wall having an opening surrounded by an edge of the wall, a component secured by a weld to an outer surface of the wall, and seal substantially impervious to hydrocarbon permeation, contacting a surface of the component, and biased into elastic contact with said edge.

Abstract: A gate valve for mounting in a pipeline comprises a valve body and a gate mounted in the valve body so as to be movable between an open position, and a closed position where a valve opening formed in the valve body is closed by the gate. The gate comprises two opposed faces spaced from the transverse plane of the gate, at least one face being provided with at least two seals that each extend around the face one seal being located within the periphery of the other such that both seals, when the gate is in the closed position, seal against a seat of the valve body to seal against the pressure of fluid acting on the gate in use. In one embodiment, a gate has four seals in total, two on the upstream gate face and two on the downstream gate face.

Abstract: A wellhead or Christmas tree seal assembly that forms a metal-to-metal seal between inner and outer wellhead or Christmas tree members. U-shaped metal seals having legs that face in opposite directions, are bonded to a wiping element. During installation of the seal assembly, the ends of the seal legs seal against the wellhead members and the wiping element compensates for defects on the surfaces of the wellhead members. The wiping element can be of an elastomer, metallic, or intercalated graphite material.

Abstract: An arrangement between blade elements in a blade row in a turbine is described. Each blade element has at least one shroud element and a blade airfoil which abuts on, and is connected to, the shroud element, and essentially extends radially with regard to a principal axis of the blade row. When installed, the shroud element sides, which extend circumferentially, abut on the respectively adjacent shroud element of the respectively adjacent blade element, each forming an essentially radial gap. At least one blade element has a projection which projects into the shroud element of the abutting blade element and extends in the circumferential direction, and at least one blade element has a recess which accommodates such a projection. In the region of the projection or recess there is a stepped region of the radial gap, and the guiding of the radial gap in this stepped region is a labyrinth seal.

Abstract: An annular seal member includes: an annular base part; and a seal edge, which is provided on both end faces of the annular base part to protrude in opposite directions, wherein the seal edge is configured to closely contact with a opposing face of a seal target such that an inner periphery side of the base part and an outer periphery side of the base part are fluid-tightly partitioned, wherein a plurality of the seal edges is provided in parallel with each other in at least one area of the base part, and wherein the number of the seal edges in the at least one area of the base part is larger than the number of the seal edges in the other area of the base part.

Abstract: A thin flange, for use with a vacuum system, includes a member having a diameter and a thickness. The member has a first face having a first sealing surface. The member has a second face opposed and substantially parallel to the first face. The second face has a second sealing surface. The thickness of the member is less than previously attained. In some designs, the thickness of the member is less than 0.28 inches.

Abstract: An electronic sign module housing having an overmolded gasket seal including an elastomer overmolded gasket seal with an inner and an outer lip and a base overmolded to a rearwardly located contact surface of an electronic sign module housing. Grooves on the contact surface of the electronic sign module housing provide additional bonding surfaces with a greater surface area to enhance the chemically-bonded overmolding of the overmolded gasket seal. Truncated conical projections extending forwardly from the elastomer base extend into correspondingly shaped truncated conical cavities in the electronic sign module housing in order to provide additional chemical bonding and to provide a geometrically based frictional engagement arrangement.

Abstract: A press-in-place or “PIP” seal has a length and a cross section. The cross section, when in an uncompressed state, includes a top portion that includes a first bead and a second bead. The top portion has a seal width. The cross section further includes a bottom portion having a third bead and a fourth bead. The bottom portion has a narrow width that is narrower than the seal width. A first side surface connects the third bead with the first bead and a second side surface connecting the fourth bead with the second bead.

Abstract: A filtration sealing system is provided for sealing a filter element in a housing at a mating interface therebetween. The sealing system includes a keyed interface. A replacement filter element is provided for such filtration sealing system, with the replacement filter element including a keyed interface.

Abstract: By improving a metal gasket having a corrugated portion which is advantageous in sealing property, a non-asbestos gasket in which the sealing property is further improved is provided. A non-asbestos gasket has a three-layer structured sealing portion S configured by: a core layer 1A which is made of a plate of a metal, and which is formed into a concentric circle-like corrugated shape; and surface layers 2, 3 which are made of expanded graphite, and which are stacked on the front and back faces of the core layer, respectively. In an outer circumferential end of the sealing portion S, the core layer 1A is protruded from the front and back surface layers 2, 3 toward an outer diameter side. In an inner circumferential end of the sealing portion S, the front and back surface layers 2, 3 are protruded from the core layer 1A toward an inner diameter side, thereby covering the core layer 1A.

Abstract: A first gasket 10 is placed in a groove formed in a cam cover and seals a gap between a cylinder head and the cam cover. The first gasket 10 includes a pair of seal lips 13 which come into tight contact with the cylinder head and which are provided in parallel to each other, and a plurality of connecting portions 15 which are provided between the pair of seal lips 13, which are connected to each of the seal lips 13, and which hold a distance between the seal lips 13 near the connected portion.

Abstract: A seal for use between the housing of an automatic transmission and the housing (can) of a transmission drive motor is disposed at each end of the drive motor housing. The seal includes a preferably metal annulus having inner and outer elastomeric ribbed seals secured thereto. The annulus, which defines a non-hardened “S” shape in cross section, maintains the shape and strength of the seal and the ribbed inner seal provides a fluid tight seal with the motor housing while the ribbed outer seal provides a fluid tight seal with the transmission housing.