Abstract: The present disclosure relates to a reclosable sealing arrangement for a garment, comprising inter-connectable first tubular portion and second tubular portion for encircling a body portion of a user, a releasable connection system having a first annular connection member extending circumferentially around the first tubular portion and a second annular connection member extending circumferentially around the second tubular portion, whereby the releasable connection system is configured to interconnect said first tubular portion with said second tubular portion, and wherein the reclosable sealing arrangement further comprises a first annular seal member extending circumferentially around the first tubular portion and a second annular seal member extending circumferentially around the second tubular portion to form a fluid-tight seal configuration for the releasable connection system when said first annular connection member is inter-connected to said second annular connection member.

Abstract: A dispensing baked good container assembly includes a container having a pastry bag extend between an upper portion and a lower portion. The pastry bag is flexible. The pastry bag has an internal cavity configured to hold baked good ingredients. The lower portion has a lower dispensing opening at a dispensing tip at a bottom of the pastry bag through which the baked good ingredients are dispensed. The dispensing baked good container assembly includes a support ring coupled to the upper portion of the pastry bag. The support ring is rigid or semi-rigid to support the upper end of the pastry bag and form a funnel providing access to the internal cavity.

Abstract: The present invention relates to a telescopic drainpipe assembly, which includes a spiral telescopic pipe body and a first adapter connected to one end of the spiral telescopic pipe body. The first adapter includes a hollow first adapter seat and a first pipe connector connected to the first adapter seat, the first pipe connector is spirally provided, and the first pipe connector is in threaded connection to the spiral telescopic pipe body. The telescopic drainpipe assembly is capable of increasing the drainage length as required, or shortening the length as required for storage. Moreover, the first adapter is capable of being installed to the spiral telescopic pipe body through threaded connection. The structure is reasonable, easy to disassemble and assemble, convenient for replacing the spiral telescopic pipe body as needed, and the first adapter can be reused, thereby effectively saving usage, costs.

Abstract: Disclosed herein are several embodiments of a negative pressure appliance and methods of using the same in the treatment of wounds. Some embodiments are directed to improved fluidic connectors or suction adapters for connecting to a wound site, having an air leak channel separated from a suction channel.

Abstract: A device for storing and extending a hose for supplying conditioned air to an aircraft on the ground or to any other interior space, includes: a tubular housing (11) extending along a longitudinal axis (Z) and having a free open first end, which tubular housing (11) can store a hose; a hose (1) in fluid communication with a conditioned air unit and having a free downstream end; a drive system (4) that can be used to control the extension and retraction of the hose (1) between a retracted position in which the downstream end of the hose (1) is located in the tubular housing (11), and an extended configuration in which the downstream end of the hose (1) is outside the tubular housing (11) and at a distance from the first end of the tubular housing (11). The drive system (4) has N=4 to 8 drive bearings (6.1-6.6) disposed perpendicularly to the longitudinal axis (Z) and connected to one another by N swivel joints (7.1-7.7), thereby forming a closed chain.

Abstract: A glove attachment system that includes a hollow frustoconical inner member having a plurality of ribs and a plurality of grooves disposed on an external surface of the hollow frustoconical inner member, and a sealing collar for joining gloves to sleeves is disclosed, wherein the plurality of ribs and the plurality of grooves of the hollow frustoconical inner member and the plurality of ribs and a plurality of grooves of the sealing collar are configured to mate and releasably join a sleeve and a glove that are radially compressed between the plurality of ribs and the plurality of grooves of the hollow frustoconical member and the plurality of ribs and the plurality of grooves of the sealing collar, and wherein the sleeve and the glove are separately formed and extend in opposite directions.

Abstract: This invention offers a fully protective cowl neck garment with various fasteners designed to attach additional protective gear, such as gloves and shoe coverings. Additionally, a temperature sensor shield is located on the hat and protective mask. This allows the clients or patients the ability to see and to monitor the temperature of their caregivers. The caregiver's temperature is visible on the hat, as well as the face mask. This makes the caregivers accountable to their clients or patients, as well as their colleagues and coworkers. This invention eliminates the worry of contact with infectious diseases or dangerous liquids, by utilizing elastic manual ties and hook-and-loop fasteners to ensure the garment is secured fully on a user's body. Overall, this invention ensures medical professionals, firemen, emergency medical personnel, government workers, and so forth, are protected fully from contagious and infectious diseases, liquids, and so forth.

Abstract: A connector for connecting an oxygen delivery device to a patient interface. The connector includes a housing with a first lumen for delivering oxygen and a second lumen to allow pressure to be measured. A third optional lumen may allow for gas sampling. The housing surrounding the first and second lumen has a portion that includes encoding for determining the type of patient interface being used, as well as a depth indicator sensor.

Abstract: A conduit clip for use in a conduit clip arrangement together with a conduit includes: a ring member adapted to be placed around the conduit, the ring member having a through axis, a circumferential radially internal surface, and a circumferential radially external surface, the ring member comprising semi-circular ring portions connected by a living hinge. The circumferentially external surface has a circumferentially smooth envelope. Each side wall of the ring member is provided with a clamping device that cooperates with an attachment member. The circumferential radially internal surface has at least one upstanding projection configured to engage a groove in the conduit sheath when placed around it.

Abstract: An air conditioner includes a stainless steel pipe having one end connected to a compressor and the other end connected to a refrigeration cycle component to form a single pipe between the compressor and the refrigeration cycle component, the stainless steel pipe partially having a corrugated part to attenuate vibration transferred from the compressor to the refrigeration cycle component, wherein the corrugated part is integrally formed with the other portion of the stainless steel pipe as at least a portion of the stainless steel pipe is processed.

Abstract: An otologic prosthesis is disclosed. In accordance with some embodiments, the device includes a set of crimping prongs comprising a lattice structure provided on a surface of each crimping prong in the set of crimping prongs to support and promote osseointegration. In accordance with some embodiments, the stem and the TM plate are separate pieces configured to be attached by a snap-fit mechanism. In accordance with some embodiments, the device is an adjustable length prosthesis with an internalized sizing mechanism. In accordance with some embodiments, the device is adjustable by a rotatable joint that facilitates rotation of a first stem section with respect to a second stem section for adjustment and readjustment on a patient-specific basis.

Abstract: A pipe joining system and pipe joint are shown in which two sections of plastic pipe, particularly molecularly oriented pipe, are joined. A first section of plastic pipe has a female, belled pipe end with a mouth opening and having an exterior surface, an interior surface and having an interior circumferential recess formed in the belled pipe end adjacent the mouth opening on the interior surface thereof. A second section of plastic pipe having a mating male plastic pipe end has an interior surface and exterior surface. The exterior surface has a circumferential groove formed at one circumferential location thereof which is alignable with the interior recess formed within the mouth opening of the belled pipe end as the pipe joint is made-up. The circumferential groove is formed during the manufacture of the plastic pipe by expanding the pipe against a restraining element located in the interior of an expansion mold.

Abstract: A breathing tube for conducting a gas mixture in a ventilation system is provided, the tube including a tube portion; a coupler connectable to the tube portion; a connecting piece connectable to the coupler and which is attachable to a tube or a machine; wherein a filter element for filtering the gas mixture is arranged between the coupler and the connecting piece. The coupler includes a first integral electrical heating device which surrounds the filter element and which is adapted to heat the filter element effectively.

Abstract: A expandable duct assembly includes a dryer. A duct is structured to have resiliently expandable ends. The duct may be coupled between the dryer and an exhaust port. The duct directs an exhaust from the dryer to the exhaust port. A pair of strips is provided. The strips may be coupled to the dryer and the exhaust port. The duct engages the strips. The duct is retained on the dryer and the exhaust port.

Abstract: An apparatus for blocking discharge from a flanged pipe coupling, including a strap configured to surround, and cover a gap between flanges. The apparatus includes a tensioning mechanism with a lever pivotally coupled to the strap, a clamp pin mounted on the opposing end of the strap, and an adjustment pin on a side of the clamp pin opposite the lever. Holes extend through ends of the clamp and adjustment pins. The tensioning mechanism includes a bolt having ends, and a mid-portion looped around the lever, so that portions of the bolt on opposing ends of the mid-portion are generally parallel and project through the holes. A fastener is mounted onto each bolt end on a side of the adjustment pin opposite the clamp pin. When the lever pivots away from the clamp pin, contact between the lever and bolt urges the ends of the strap together, increasing tension therein.

Abstract: A coupling member is provided that is readily separable from another coupling member even if frozen. A female coupling member has a coupling member fitting portion capable of receiving a male coupling member, a recess formed on an inner circumferential surface of the coupling member fitting portion and having an opening portion opening on the inner circumferential surface and a bottom portion, and a plurality of pliable members secured to the bottom portion and extending from the bottom portion to the opening portion so as to be capable of contacting an outer circumferential surface of the male coupling member.

Abstract: A cable protector includes a base member, at least one channel, and at least one connector. The at least one channel extend between opposing first and second ends of the base member and is structured to house at least one cable. The at least one connector extends from a first end of the cable protector and includes a hand grip feature. The hand grip feature of the at least one connector may include a plurality of recesses or protrusions formed in a side surface of the at least one connector. The cable protector may also include at least one connector recess that includes a hand grip feature. The hand grip feature of the at least one connector recess may include a plurality of recesses or protrusions formed in a side surface of the at least one connector recess.

Abstract: A system and method for connecting two flexible containers is provided, in particular for the environmentally sealed connecting of two open ends of tubular films. The method has at least the following method steps of: everting a first open end of a first flexible container over a first ring; everting a second open end of a second flexible container over a second ring, subsequently inserting the first ring through the second ring into the inside of the second flexible container; subsequently aligning, in a parallel and coaxial relationship, the rings in relation to one another; and abutting the rings with the ends clamped in between them.

Abstract: A connecting device for connecting a flexible container to a flange or a connecting ring includes an outer ring, which has an inner surface radially inside and a connection side facing the flange or the connecting ring, and an inner ring, which has an outer surface radially outside and over which an end section of the container can be turned. The outer and inner surfaces are at least partially congruent so that the end section can be clamped between the outer and inner rings. The inner ring can be inserted into the outer ring from the connection side. The outer ring has an accommodating groove radially inside. The accommodating groove extends completely around the outer ring, is open radially inwardly, and has a round cross-section. The inner ring is one-piece and has a round cross-section in an area of the outer surface and is made of a single flexible material.

Abstract: A cuffed connection system for the transport of a particulate material includes a tube, a conduit, or a duct, and a flexible tube end received and snap fit inter-engaged within the tube, the conduit, or the duct. The snap fit is of a pair of outward circumferential forms each into a complementary receiving groove of a ferrule.

Abstract: Disclosed herein are several embodiments of a reduced pressure appliance and methods of using the same in the treatment of wounds. Some embodiments are directed to improved fluidic connectors or suction adapters for connecting to a wound site, for example using softer, kink-free conformable suction adapters. Certain embodiments are directed to connectors used to connect fluid passage tube used in transmitting negative pressure to a fabric channel used in a suction adapter.

Abstract: A hose section for use in a modular PCA air delivery system includes a tension strap extending approximately parallel to and away from the body of a first end of the hose section, and a receiver loop formed on the exterior of the second end that receives a part of the strap therethrough so that the strap can be folded back in the direction of the first end, and fastened to the first end thus holding the first hose section to the second hose section when either hose section is pulled.

Abstract: A vascular access device for communicating with the vascular system of a patient may include a status indicator. The status indicator may detect and signal that a period of time has elapsed in relation to the use of the vascular access device.

Abstract: An embodiment of the present invention relates to a connector used to connect pipes for conveying a fluid, and more particularly, to a plastic male screw connector which is manufactured through injection molding to replace a conventional screw connector made of a costly metallic material with an injecting-molded plastic screw connector so that the manufacturing costs can be reduced. According to the plastic male screw connector manufactured through injection molding according to the embodiment of the present invention, advantages are provided in that, since a screw connector for connecting pipes is manufactured through injection molding of a plastic material, mass production of the screw connector becomes possible and the manufacturing costs can be significantly reduced. Also, because the screw connector is made of the plastic material, excellent pressure resistance with respect to a high pressure, corrosion resistance with respect to a fluid used, and friction resistance can be accomplished.

Abstract: A cuffed connection system for the transport of a particulate material includes a tube, a conduit, or a duct, and a flexible tube end that is received and snap fit so as to be inter-engaged within the tube, the conduit, or the duct. The snap fit inter-engagement is of a pair of outward circumferential forms each fit into a complementary receiving groove of a ferrule.

Abstract: A coupling is provided with inner and outer diameter dimensions and structures optimized for connection with a variety of sizes and types of pipes and tubing, including the connection of three or more pipes to a coupling having at least one collapsible corrugated section.

Abstract: The invention relates to a polymer connecting piece (1) for a clamping connector for pipes and/or tubes (2), made of a polymer material and comprising at least two pipe/tube connecting elements (3). At least one connection element (3) comprises a plug-in area (5) that is provided with peripheral ribs (4, 4a, 4b) and that is used to slide open the end of a pipe and/or tube (2a), to which respectively one flange projection (6) connects. At least one tooth-shaped elevation (7) is arranged on the side of the flange projection (6) opposite the peripheral ribs (4, 4a, 4b). The invention also relates to a clamping connector for pipes and/or tubes (2) made of a polymer material and comprising the inventive polymer connecting piece (1) and a sliding sleeve (10) that can be moved axially in relation to the pipe/tube axis.

Abstract: A tubing assembly including elongated first and second tubes for carrying a fluid flow. Each tube is a composite tube having an inner layer, a middle layer surrounding the inner layer, and an outer layer surrounding the middle layer. At the end of each tube, the tubes are flared outward from an axis of the tubes in complimentary shapes with the middle layer being directed away from the fluid flow and following a contour of the inner layer. The tubing assembly may include a gasket provided intermediate the inner layers. A clamp compresses the ends together and the gasket (if provided) to create a joint between the inner layers of the ends and maintain a seal between the inner layers of the flared ends.

Abstract: A conduit system is described for providing fresh air to aircraft positioned on the ground. The conduit system includes self-similar conduit sections having a female or connection end in a male or insertion end. The conduit sections may be back-compatible with existing fresh air conduits. The connection end forms sides or flaps joined by integral flexible bellows or gussets. The connection end thus forms a closed ring. The male end may be secured within the connection end by means of hook-and-loop fastener material and the connection end may be closed over the male end. The connection end is then completely closed by securement of extension tabs to an exterior surface of the connection end, thereby collapsing the integral bellows.

Abstract: A conductive tubular connector insert for use in a fuel conveying system to couple a first conductive polymeric tubular member to a second conductive polymeric tubular member such that electrical conductivity is insured in the system as described.

Abstract: An articulating ball-and-socket fluid coupling includes a ball body, a socket body, a primary retainer structure, an annular seal assembly and a secondary retainer structure. The primary retainer structure has a shaft extending through the ball and socket bodies to connect the ball body and the socket body together while permitting the ball body and the socket body to articulate relative to each other. The secondary retainer structure includes an annular member disposed in a ball receiving conduit portion of the socket member and connected to the socket body at or adjacent to an opening into the ball receiving conduit portion. The annular member has an inner secondary retainer diameter less than a spherical diameter of a partially spherical exterior surface defining a ball portion of the ball body so that the secondary retainer structure retains the ball body and the socket body connected if the primary retainer structure fails.

Abstract: The present invention provides an apparatus for pre-conditioned air (PCA) hoses and an assembly for a plurality of PCA hoses. The present invention further provides a method of assembling a plurality of PCA hoses. A hose in the assembly has an outer vinyl layer and further an insulative layer and an inner antibacterial layer. Hook and loop fasteners are employed to provide a way for attaching and securing junctions between hoses in the assembly, where two ends are butted together to form one of the junctions. The two ends each have a first portion of the hook and loop fastener attached substantially about the circumference of the hose. An elongated member having a second portion of the hook and loop fastener is attached at one of the ends where it is effective for wrapping about the circumference of the hoses thereby connecting and covering the butted junction between hoses.

Abstract: The present invention provides an apparatus for pre-conditioned air (PCA) hoses and an assembly for a plurality of PCA hoses. The present invention further provides a method of assembling a plurality of PCA hoses. A hose in the assembly has an outer vinyl layer and further an insulative layer and an inner antibacterial layer. Hook and loop fasteners are employed to provide a way for attaching and securing junctions between hoses in the assembly, where two ends are butted together to form one of the junctions. The two ends each have a first portion of the hook and loop fastener attached substantially about the circumference of the hose. An elongated member having a second portion of the hook and loop fastener is attached at one of the ends where it is effective for wrapping about the circumference of the hoses thereby connecting and covering the butted junction between hoses.

Abstract: An antikink device that is especially useful in sewage systems for installing pipes (15), in particular light wave guide cables. The device comprises a deflection element (1) that can be secured by means of a bracket (2) and that deflects pipes (15) arriving from a first direction to a second direction. The bracket (2) comprises a first angular element (4) that can be connected with a second angular element (5) and that includes in a first plane an adjustable angle, and that in turn includes an adjustable angle with a base plate (3) that can be mounted on a supporting surface and a second plane that is at least approximately perpendicular to the first plane, the deflection element (1) being mounted on the second angular element. The bracket (2) can be easily mounted and the deflection element (1) can be easily brought in the desired position and fixed.

Abstract: A joint between the ends of two flexible ventilating ducts (10A, 10B), an end (11) of one of the ducts (10A) having a stiffening ring (13) and being telescoped over the other duct (10B), and an outer capping (14) connected to the other duct (10B) enclosing the joint between the telescoped ducts.

Abstract: The invention relates to a swivel connection for a flexible dryer duct. The swivel connection is comprised of two sleeves, one of which can slide within the other. Each of the sleeves can be connected to a section of duct. The inner sleeve has an outwardly projecting flange that can engage an inwardly projecting flange on the outer sleeve, preventing the sleeves from being pulled apart, but allowing relative rotational movement between the sleeves.

Abstract: A method of connecting a resin hose to a metal pipe comprising the steps of: forming a fluororubber coating layer on an inner peripheral surface of the resin hose; forming a lubricating layer of a fluorine-containing lubricant on an inner peripheral surface of the fluororubber coating layer; and inserting an end portion of the metal pipe into an end portion of the resin hose formed with the lubricating layer. Fluorine atoms in a fluororubber molecular skeleton are hydrogen-bonded to hydroxyl groups introduced in a metal of the metal pipe and therefore the adhesion between the resin hose and the metal pipe is enhanced for improvement of the sealing property. Further, the lubricating layer facilitates the insertion of the metal pipe into the resin hose for the connection therebetween.

Abstract: A hose for transport of conditioned air between a ground-based heating-ventilating unit and an internal ventilation system of an aircraft comprises at least one hose segment. The hose segment has an end provided with a fastener interconnectable with a fastener on an end of an adjacent hose segment. The hose segment also has an interior insulation layer sealed to inhibit migration of moisture between the insulation layer and the interior of the hose.

Abstract: A hose for delivery of pre-conditioned air between a ground-based heating-ventilating unit and an internal ventilation system of an aircraft comprising at least two hose segments. The hose segments can have an end provided with a fastener interconnectable with a fastener on an end of an adjacent hose segment. Each hose segment can also have an exterior layer formed of a single piece of flexible material wherein opposing longitudinal sides of the piece of material are joined at a single longitudinal seam. Further, at least one protective flap can be located adjacent the fastener on one hose segment and adapted to cover the adjacent fastener and an interconnected fastener when the at least two hose segments are connected to each other.

Abstract: A tube connection apparatus for use with larger diameter flexible tubing particularly for hazardous material removal comprising an outer tapered sleeve and an inner tapered sleeve that is sized to snugly fit within the outer tapered sleeve and to engage the flexible tubing therebetween. A retainer ring is provided to secure a second flexible tube to the outer tapered sleeve and a transportable wall section which holds the sleeves may be positioned in a passageway of a building and tubing from spaces on either side of the passageway be connected.

Abstract: A tube connection apparatus for use with larger diameter flexible tubing particularly for hazardous material removal comprising an outer tapered sleeve and an inner tapered sleeve that is sized to snugly fit within the outer tapered sleeve and to engage the flexible tubing therebetween. A retainer ring is provided to secure a second flexible tube to the outer tapered sleeve and a transportable wall section which holds the sleeves may be positioned in a passageway of a building and tubing from spaces on either side of the passageway be connected.

Abstract: An irrigation hose splice and method of making the same that permits used irrigation hose to be reinstalled and retrieved in the same manner as new irrigation hose. The method of splicing includes providing two segments of unjoined irrigation hose. Inserting a heat shield into a first segment to prevent its inner circumferential surface from fusing together when the first hose segment is later fused with a second hose segment. Inserting the first hose segment into the second hose segment, creating an area where the two segments overlap. Appyling heat and compression simultaneously at the overlapping area to fuse together the first and second hose segments, creating an irrigation hose splice which is composed of material from the first hose segment and the second hose segment that have been fused together.

Abstract: A novel writing utensil in which an ink holder unit can be inserted into, and extracted from, a housing/main shaft. Helicoid screw threads are formed on the outer circumferential surface of a coupling portion of the ink holder unit or an inner circumferential surface of the main shaft. The main shaft or the outer circumferential surface of the ink holder unit without the screw threads is made of an elastic material for allowing the screw threads to bite thereinto. The coupling portion of the ink holder unit can be threaded into the main housing or pressed in a straight line thereinto. The ink holder unit can be extracted by relatively rotating the ink holder unit and main housing.

Abstract: A tube connection apparatus for use with larger diameter flexible tubing particularly for hazardous material removal comprising an outer tapered sleeve and an inner tapered sleeve that is sized to snugly fit within the outer tapered sleeve and to engage the flexible tubing therebetween. A retainer ring is provided to secure a second flexible tube to the outer tapered sleeve and a transportable wall section which holds the sleeves may be positioned in a passageway of a building and tubing from spaces on either side of the passageway be connected.

Abstract: An interlocking restraint plastic pipe joining system is shown which features female and male end connections for adjacent lengths of pipe. The female end connection has at least one radially extending indention or protrusion within the mouth opening thereof. The male end connection has at least one radially extending protrusion or indention formed on an exterior surface thereof. The indention and protrusion matingly engage in snap fit fashion as the joint is formed by forcing the male connection axially into the female connection.

Abstract: A system is provided for delivering particulate material from a material storage hopper to a remote discharge station on a wheeled frame structure of an agricultural implement. The system includes a material dispensing mechanism, a connector, and an elongated material conveying tube. The dispensing mechanism is adapted to receive material from the hopper and dispense the material through an outlet conduit. The outlet conduit is directed at an angle relative to the discharge station. The conveying tube delivers material from the dispensing mechanism to the discharge station. The connector interconnects the outlet conduit to one end of the tube and has a passageway therethrough to allow material to pass from the outlet conduit to the tube. The connector is configured to direct the axis of the tube generally closer to the discharge station relative to the axis of the outlet conduit.

Abstract: A conventional plastic cap is provided incorporating a longitudinally tapering, generally cylindrical hollow body having opposite large and small diameter ends with the large diameter end being open and including a first diametrically outwardly projecting flange extending circumferentially thereabout and the small diameter end being closed and including a second diametrically outwardly projecting circumferential flange of greater outside diameter than the outside diameter of the large diameter end of the body independent of the first flange supported therefrom.

Abstract: An improved welding rod having a solid homogeneous core of thermoplastic material and a resistance element comprised of a plurality of wires is presented with a method and apparatus for forming the welding rod. The welding rod is positioned between members of the thermoplastic material to be welded and a current and pressure is applied to the resistance element causing the thermoplastic material of the solid core and the adjacent thermoplastic members to fuse and form a unitary weld. Simultaneously the electrical resistance element is embedded in the weld, mechanically reinforcing and strengthening the connection. There is also disclosed a method for electric fusion welding of thermoplastic members wherein the welding rod is pre-attached to one of the thermoplastic members.

Abstract: Pre-conditioned air hoses for aircraft are provided which consists of a plurality of hose segments and a plurality of hook and loop fasteners closure connections interconnecting the hose segments. When the hose segments are assembled, pre-conditioned air can be carried from a ventilating system to the aircraft on the ground before the aircraft is operational and ready for takeoff.

Abstract: Flexible assembly designed for coupling flexible tubes comprising a sleeve (1) designed to receive the ends of two tubes to be coupled and provided with assembly means designed to cooperate with complementary assembly means carried by the ends of said tubes, characterized in that the assembly means of sleeve (1) have an annular chamber arranged in the inner wall of the sleeve, and whose edges form shoulders with reflex angles (3, 3') giving to it, in axial section, a dovetailed profile, and in that the complementary assembly means carried by tubes (7, 8) to be coupled are made up of tubular stops (5) permanently attached onto the ends of tubes (7, 8), the stops having an outer diameter corresponding to the inner diameter of the annular chamber arranged in sleeve (1) and at least their edge designed to cooperate with the corresponding shoulder with reflex angle of the chamber having a complementary inclined profile (6) of that of shoulder (3) with reflex angle, and in that the length of the annular chamber is