Abstract: An irradiated polyethylene tube is supported on a mandrel with adhesive material applied against its outside surface whereupon a first tubular layer is braided against the adhesive means followed by a tubular layer of neoprene rubber followed by braiding a second tubular layer against the neoprene rubber to define an assembly which is subjected to a controlled temperature environment to simultaneously vulcanize the rubber and bond the tube and tubular layers together defining the hose construction as a unitary structure.

Abstract: A composite seal for use between a movable element and a static element in a fluid pressure system where pressures vary on opposite sides of the seal. The seal comprises a fluoronated hydrocarbon sealing ring with a finely grooved sealing surface and an elastomer loading ring. The loading ring is a static seal and normally imposes radial force on the dynamic sealing ring and under increased fluid pressure deforms the peripheral grooves, forcing entrained fluid from them. The sealing ring has recovery characteristics which tend to restore the deformed grooves without readmitting fluid into the grooves, establishing a pressure differential which adheres the sealing ring to the surface to be sealed.

Abstract: Disclosed herein is a method for forming a pressure seal between the flat mating surfaces of two structural members including the steps of texturing one of the mating surfaces by providing a plurality of intersecting grooves thereon so as to form a continuous grooved recess through the region where the pressure seal is desired, applying an extrudable sealant on one of the mating surfaces along a path generally corresponding to the desired path of the pressure seal, and clamping the two structural members together to extrude the sealant into the grooves, whereby the continuous grooved recess is filled with the sealant to provide a pressure seal between the mating surfaces and face-to-face contact is established between the ungrooved portions of the mating surfaces.

Abstract: A perambulatory self-contained apparatus for facilitating care of invalids characterized by a narrow sit-down type bathtub mounted on casters. A lateral gate provides for easy access into the bathtub from ground level. Associated with the bathtub are a plurality of heated supply tanks, electrically powered pumps, mixing valves and conduits for selectively conveying liquids from the tanks or from the tub drainage outlet towards a shower ring or a hand-held spray unit.

Abstract: An apparatus for applying a stratified charge to a reciprocating internal combustion engine is disclosed. The apparatus comprises a cylindrical rotary valve body disposed for rotation within the head of an internal combustion engine. The valve body defines diametrically extending inlet and exhaust passages which, during rotation of the valve body, place a cylinder of the engine in sequential communication with an inlet manifold and an exhaust manifold secured to the head. The inlet manifold comprises a double-passage gallery for transporting a lean fuel/air charge in a first passage and a rich fuel/air charge in a second passage. Rotation of the inlet passage into communication with the cylinder also brings the inlet passage into sequential communication with the first throat and then the second throat for transporting the first lean charge and then the second rich charge to the cylinder.

Abstract: A baffle transforms a pressure stream of basic liquid into an annular flow with a hollow core, filled with another medium. By increasing the pressure in the discharge part of the mixer the liquid and the medium are thoroughly mixed and the mixture introduced into a container, to produce turbulent motion in the bulk of liquid.

Abstract: A known type of base for a shower comprises a carrier having a shower tray. The carrier can be moved between a first position and a second position. In the first position the shower tray is substantially horizontal and can thus be used in taking a shower. In the second position the shower tray is substantially vertical and the carrier thus occupies less floor space. The improvement characteristic of the invention is the provision of a wash basin as part of the carrier; the basin opens upwards for use in washing when the carrier is in its second position.

Abstract: A packing assembly for location within a groove in one of a pair of relatively movable members comprises a deformable seal member having sealing lips engaging with the base wall of the groove and the surface of the other member, and a pair of support members. One or both side faces of each support member are provided with leakage grooves to enable fluid under pressure which collects in the zone defined between the support members, to be dissipated.

Abstract: A seal assembly disposed on a central longitudinal axis thereof which comprises a pair of annular rigid seal members and a pair of elastomeric retaining members. Each of the annular rigid seal members has a first seal surface, an annular groove and a second seal surface in sequence from the top.

Abstract: In a stern seal and bearing assembly for the stern shaft of a ship there is an oil seal assembly at the outboard end of the bearing and a sea water seal (preferably a face seal) axially spaced from it, with a drain from the space between the two, and the oil seal assembly comprises a pair of lip seals directed towards each other with a drain from the space between them. The oil supply to the bearing can be at low pressure, for example simply the static head from a tank slightly above the level of the bearing, and the last-mentioned drain may have a swan neck above the oil level.

Abstract: A packing for use in a steel-pipe hydraulic testing apparatus, consisting of: an annular body having an annular cut in its inner peripheral portion; a plurality of backing pieces fastened to the wall of the annular cut at a given circumferential spacing and directed in the radial direction; and a plurality of adapter pieces embedded in the inner peripheral walls of the annular body of the packing at a given circumferential spacing and exposed to the annular cut, so that the aforesaid plurality of backing pieces may be each slidable on the surfaces of a pair of adjoining adapter pieces. This packing is contracted due to a hydraulic pressure being applied to the outer periphery of the body of the packing, and as a result the respective adapter pieces will slide on the surfaces of the adapter pieces in the circumferential direction of the packing.

Abstract: The pressure vessel of a hydraulic accumulator comprises bowl-shaped body and lid members welded together edge to edge, lid member uppermost. A bowl-shaped diaphragm in the vessel having its concave surface facing up is supported by a rigid ring having a large diameter radially outer portion seated on an upwardly facing circumferential shoulder on the body member, near its rim. A smaller diameter radially inner portion of the ring is clinched over a bead around the edge of the diaphragm. The ring also has a frustoconical, upwardly tapering radially intermediate portion connecting its radially inner and outer portions, to hold the rim of the diaphragm at a high level in the vessel.

Abstract: An injection mold cavity is sealed at the mold parting line using a highly exact, narrow annular gap or clearance which restricts flash through of the molten plastic. The seal is designed for molds having a rotatable pin and comprises a fixed seating ring which seats with the mold cavity element, and a journable seal ring having a precisely machined seal face which is narrowly spaced from the lip of the mold cavity and defines the gap dimension with the assistance of the seating ring. The rings float at a unit against a resilient component which controls the seating pressure of the assembly independently of the clamping force of the mold. The foregoing components are unitized within a clamp ring under a preload compressive force with the critical gap dimension precisely built into the unit.

Abstract: A frontal seal for tracked vehicles comprises two rings one of which slides on the other with a certain pressure exerted by resilient members coaxially mounted on each ring. The rings comprise a frusto-conical portion provided, in correspondence of the major base, with an outwardly directed radial flange, whose surface opposed to the ring body forms the friction surface of the ring, and a cylindrical portion adjacent to the frusto-conical portion and joined thereto in correspondence of the minor base thereof. The resilient members comprise an annular body which in cross section is composed by a trapezoid and a circle tangent to one of the non parallel sides of the trapezoid. In the assembled seal the portion with circular cross section is also tangent to the ring body in correspondence of the junction line between the cylindrical and the frusto-conical portions thereof.

Abstract: An inflatable packer including a tubular mandrel having generally radial ports therethrough and a sub slidably telescopically mounted on the mandrel. A first annular space, in communication with the ports, is formed between the mandrel and the sub. An inflatable packer element is carried by the sub, the mandrel extending through the packer element such that a second annular space is formed between the mandrel and the packer element. A valve mechanism is disposed in the first annular space and includes an annular seal means and a locking mechanism. The seal means is operative upon the presence of pressure differential decreasing thereacross toward the second space to permit fluid flow through the first annular space from the ports to the second annular space and inflate the packer element. The seal means is further operative upon the presence of pressure differential decreasing thereacross toward the ports to form a seal between the ports and the second annular space.

Abstract: The two coupled vertical-lift slides of a mixing head for multicomponent plastics are formed with recesses which, in the rest position of the mixing head, form part of the mixing chamber wall so that a stripping rod, whose diameter is greater than the minimum interval between the vertical-lift slides, can be pushed through, preferably perpendicularly of the vertical-lift slides, to scrape out the mixing chamber.

Abstract: Non-stressed, high strength, substantially inflexible, rigid, cement-containing pipe, for example, asbestos-cement pipe well adapted as high pressure water pipe, comprising a tubular article body of spirally wound up layers of asbestos-cement, and a plurality of helical windings of a continuous filament of an aromatic polyamide fiber known and obtainable as KEVLAR aramid fiber about one or more of the asbestos-cement layers within the interior of the pipe without being stretched and without being in tension. The aromatic polyamide fiber of the continuous filament is of high tensile strength of about 390,000 psi or higher and a low elongation capability of no more than 7%, and the continuous filament of the belical windings is maintained about the cement-containing composition within the interior of the pipe without being stretched and without being in tension. Non-stressed, high strength concrete pipe is also embodied in the invention.

Abstract: A seal arrangement is provided having a pair of elastomeric seal rings with a seal band adjacent the innermost diameter of the rings. The seal rings are retained by means of a pair of elastomeric torics, one of which is relatively immovable and the other of which is relatively movable. The movable toric is positioned between supporting structure incorporating ramps of low angle, which improves the pressure, velocity relationships of the seal and permits operation at higher speeds. Retention of the other toric stabilizes the seal and prevents cocking or tilting of the rings so as to maintain the sealing plane perpendicular to the rotational axis. An arrangement is thus provided wherein the seals are of nearly equal surface area which produces pressure balanced seals and a more constant, level force along the axis.

Abstract: A lightweight shampooing unit is disclosed comprising a hood having a manifold therein for directing water, shampoo or air into the hood and an outlet for discharging water, shampoo or air, the hood being adapted to be worn on the head around the scalp area, a sealing member being provided on the edge of the hood to prevent leakage of air, water or shampoo from the hood when in use. A water supply, pump and shampoo supply as well as an air blower are operatively connected through valves for delivering water or shampoo or air under pressure to the manifold in the hood, the water or shampoo being supplied under sufficient pressure to provide an agitating action within the hood. The discharge end of the hood is connected into a valve which is operable to either recirculate shampoo or rinse water through the pump and back into the manifold for efficient use of the shampoo and the rinse water or to vent the rinse water and shampoo as well as air from the hood.

Abstract: A flexible seal element with a reinforced drain labyrinth is disclosed for use on the outer seal ring of a seal assembly located between a roll end face and a bearing chock in a rolling mill, particularly the bearing chocks of the upper backup roll and the work rolls in a four-high mill. The seal element has a circular body portion adapted to tightly surround the outer seal ring. A first circular lip extends outwardly away from the body portion at an angle relative to the axis thereof to frictionally contact the roll end face. The seal body has a drain opening which is arranged to be aligned radially with a drainage port in the outer seal ring. The drain opening is protected by a second lip which extends outwardly from the seal body in a direction opposite to that of the first mentioned lip. A relatively stiff baffle member is attached to the seal body at a location spaced radially inwardly from the second lip.