Abstract: A swivel joint for connecting together a pair of pipes and for transferring fluid between the pipes at ambient temperatures and at cryogenic temperatures. A cryogenic seal between the joint's relatively rotatable inner and outer elements prevents fluid leakage at cryogenic temperatures, and an ambient seal assembly between the joint elements provides a seal at ambient temperatures and prevents fluids from contacting the cryogenic seal. The ambient seal assembly includes an elastomeric O-ring retained in the outer element, and an annular sealing ring fastened to the inner element and spring-biased towards the O-ring. At ambient temperatures the sealing ring is held against the O-ring in a fluid-tight manner. As the temperature decreases, a plurality of rods or wires, or an annular sleeve, having a high coefficient degree of linear expansion, contracts and pulls the annular sealing ring away from the adjacent O-ring to prevent wear of, and other damage to, the O-ring at low temperatures.
Abstract: A swivel cartridge for attachment to the stationary outlet of a fluid supply to allow a fluid delivery hose to be moved freely about the supply outlet includes an inlet tube adapted for connection to the supply outlet, an outlet tube having a nose at one end received in a bore in the inlet tube and having a hose connection at the other end, a ring seal mounted on the nose closing a clearance between the bore of the inlet tube and the outside of the nose, and a ball bearing having an inner race connected to the inlet tube and an outer race connected to a housing which rotates with the outer race relative to the inlet tube and to which the outlet tube is removably secured. The nose is provided with a circumferential groove in which the ring seal is mounted.
Abstract: A rotary fluid coupling for use with such devices as tracking concentrating solar collectors is disclosed which is capable of providing excellent sealing characteristics over a wide temperature range at relatively low internal fluid pressures. The coupling includes a stationary body member which defines an internal fluid passage operating in conjunction with a conduit member one end of which is received the stationary body member forming a continuous passage therethrough wherein the conduit member is rotatable within the stationary body. A dual sealing system is employed in which a pair of resilient radial seals are utilized spaced axially along the interface between the stationary member and the conduit member. Any leakage past the first seal is collected through a drain opening in the stationary member between the two radial seals. A container may be attached to the drain opening to indicate and collect any leakage at the rotary joint.
Abstract: A shrouded tube construction including concentric tubes is attached to a cooperating coupling in such a manner as to prevent leakage from either tube, and to provide a resilient, flexible seal that permits a degree of misalignment and permits use of lighter and less expensive material for the coupling and shorter tubes connected thereby.
Abstract: The invention relates to means and methods for rendering fire-safe, or more fire-safe, steel or like pipework which is lined with a plastic or like liner. At joints in such pipework, the liner is brought out over the flange face to form the actual seal. Consequently, the liner is vulnerable to fire or other forms of external heat at the joints.In accordance with the present invention, a metal ring is provided around the periphery of the liner at each joint to protect the liner from fire. The metal ring is not intended to provide a complete seal if the seal between the liners should fail, but is does prevent any large escape of the contents of the pipework.The ring may take various forms and may be, for example, a resilient ring of either U-section or M-section. Alternatively, the ring may be of flat-section and may slide on lips formed on inserts arranged between the flanges and the liners.
Abstract: The annular space between inner and outer coaxially-mounted pipes is sealed by a bellows diaphragm with a cylindrical surface corrugated in the longitudinal direction formed in and at one end of said annular space, wherein one end of said bellows is circumferentially attached to a circumferential portion of the outer surface of the inner pipe and the other end of said bellows is circumferentially attached to a circumferential portion of the inner surface of said outer pipe. The other end of said annular space is sealed by a ring attached to a circumferential portion of the outer surface of the inner pipe and to a circumferential portion of the inner surface of the outer pipe. In one version of the invention this ring includes a pressure release valve to allow any high pressure fluids in the annular space to escape.
Abstract: Structural failures in high temperature piping arrangements are eliminated or greatly reduced by employing special pipe fittings which are connected to hanger or guide members. Each of the special pipe fittings is provided with a hollow boss to which a pipe hanging member may be fixedly secured. Suitable venting means are provided between the chamber in the hollow boss and the space outside thereof so as to prevent undue buildup of pressure within the boss.
Abstract: The present invention discloses method and apparatus for connecting together two members having mating surfaces by means of a plurality of fasteners such that equal compression forces are exerted on the members along force lines normal to a common plane. To accomplish the foregoing objectives, a plurality of pins are carried by one member and pass through bores in the opposite member. The pins are longitudinally extended simultaneously with a common internal extending force and stops are affixed to the ends extending through the second member snugly against the surface thereof. Upon release of the common extending force, all the pins attempt to restore to their original positions with equal restorative forces being equal and opposite to the common extending force applied thereto.
Abstract: The invention relates to means and methods for rendering fire-safe, or more fire-safe, steel or like pipework which is lined with a plastic or like liner. At joints in such pipework, the liner is brought out over the flange face to form the actual seal. Consequently, the liner is vunerable to fire or other forms of external heat at the joints.In accordance with the present invention, a metal ring is provided around the periphery of the liner at each joint to protect the liner from fire. The metal ring is not intended to provide a complete seal if the seal between the liners should fail, but it does prevent any large escape of the contents of the pipework.The ring may take various forms and may be, for example, a resilient ring of either U-section or M-section. Alternatively, the ring may be of flat-section and may slide on lips formed on inserts arranged between the flanges and the liners.
Abstract: A leakage preventive mechanism for flexible hoses through which is transferred fluid under a high pressure is disclosed. The mechanism comprises a rib made integral with a nipple portion of a nipple flange and circumferentially extending around said nipple portion. An end of a reinforcing layer embedded in the flexible hose passes over the rib and is wrapped around a bead wire arranged near the rib to form an inclined turn-back portion. A pair of rings are urged against the inclined turn-back portion of the reinforcing layer by means of bolts, whereby the inclined turn-back portion of the reinforcing layer functions as a packing for preventing the fluid from passing over the rib.
Abstract: A fitting for connection between two locations in a transfer system whereby fluid or gaseous substances pass from one point to another through the fitting. The fitting comprises a hollow cylinder, a hollow stem with an enlarged bullet-shaped head and slidably extending through the cylinder, a passageway providing an escape path of least resistance to leaks occurring between the bullet-shaped head and corresponding fitting in a unit into which it is placed and an annular depression at one end of the hollow cylinder, at which leaks can be detected and, if desired, a leak-test location label can be applied. The hollow stem includes a circumferential groove which is located adjacent to the annular depression, the combination providing a means for retention of leak-test solution.
Abstract: The hydraulic control system including an accumulator includes a safety connecting means for connecting the accumulator to the system so that partial disengagement of the connecting means automatically vents the accumulator to the sump of the hydraulic system.
Abstract: An adjustable drop nipple is disclosed for connecting a pendant sprinkler to a sprinkler system. The nipple includes outer and inner telescoped pipes with a gripping means therebetween which permits an adjustment of the telescoped relation of the pipes for a desired position of the pendant sprinkler below a drop ceiling.
Abstract: An assembly for drilling a hole in a roof to a greater depth than the height of the chamber therebelow includes a starter-driver bar having a first end adapted to be driven by a motor and a second end having a female socket therein, a rod extension including a male end shaped to be received in said female socket and a female socket at its other end of the same cross-sectional size and shape as the first named female socket, and a bit having a male shank of the same cross-sectional shape as said male end. A starter hole is first drilled using the starter-driver with the drill bit in its top and a motor connected to its lower end. Drilling then is continued with an assembly consisting of a first rod extension between the bit and starter-driver. Additional rod extensions are inserted between the starter-driver and the bottom rod extension until a hole of the desired depth is obtained.
Abstract: A joint assembly connected with one end of a heat insulated conduit which includes an outer casing, a concentric inner core and an intermediate concentric layer of insulation material is disclosed herein. This assembly defines a passage extending from the conduit core outwardly to the outer surface of the joint assembly. This passage is provided such that fluid therein and under a predetermined amount of pressure in the direction towards the outer surface of the assembly will move out of the passage in the direction of pressure, i.e., to the outer surface of the joint assembly rather than into the layer of insulation material comprising part of the conduit.
Abstract: A liquid tight coupling means between a flexible cable conduit and a bulkhead, the coupling means having a tubular sleeve therein of plastics material which defines with the body of the coupling means an annular recess into which the end of the conduit can be fitted.
Abstract: A swivel joint and connection for abutting high pressure hydraulic manifolds, the joint comprising two flanged non-rotating swivel bodies with one of the non-rotating swivel bodies having a rotating swivel body journaled therein. A flanged tubular sleeve is secured between the adjacent end faces of the two non-rotating swivel bodies with the opposite ends of the tubular sleeves received respectively in counterbores formed in one non-rotating swivel body and in the rotating swivel body, respectively. A static annular seal is disposed between the first end of the tubular sleeve and the counterbore in the non-rotating swivel body. A resilient dynamic annular seal is disposed between an annular shoulder on the opposite end of the tubular sleeve and a first counterbore in the rotating swivel body.
Abstract: A swivel joint and connection for abutting high pressure hydraulic manifolding, the joint comprising two flanged non-rotating swivel bodies with one of the non-rotating swivel bodies having a rotating swivel body journaled therein. A flanged tubular sleeve is secured between the adjacent end faces of the two non-rotating swivel bodies with the opposite ends of the tubular sleeve received respectively in counterbores formed in one non-rotating swivel body and in the rotating swivel body, respectively. A static annular seal is disposed between the first end of the tubular sleeve and the counterbore in the non-rotating swivel body and a dynamic annular seal is disposed between the end face of the opposite end of the tubular sleeve and the counterbore in the rotating swivel body. Improved composite elastomeric and metallic annular dynamic seals are also disclosed.
Abstract: A corrugated plastic drainage pipe having a coupler integrally formed at one end thereof and wherein the coupler is in the form of an enlarged collar having an inner diameter and length so as to receive the end of a connecting pipe therein and having a plurality of spaced latching members integrally formed with and extending radially inwardly from the inner surface of the collar. The collar has sufficient flexibility and resiliency so that when the end of a corrugated pipe is inserted in the collar the latching member may be outwardly displaced momentarily with respect to one another for facilitating making the interconnection, and thereafter return and engage the ribs of the corrugated pipe and provide a releasable connection therewith.
Abstract: A device for transmitting high pressure fluid between relatively rotating mbers. One of the members is equipped with a protruding axial cylindrical pipe having an accurately machined outside diameter and the other member has an accurately machined central bore receiving said pipe. By careful positioning and dimensioning of parts the pipe of the one member rotates in the bore of the other member without friction and with negligible loss of fluid.
June 6, 1974
Date of Patent:
May 18, 1976
The United States of America as represented by the Secretary of the Navy
Abstract: A closure for a heat exchanger of the shell and tube type in which fluid under high pressure is circulated through one or more tubes mounted in the shell. The pressure of the fluid flowing through the shell is lower than the pressure of the fluid in the tubes. The closure includes a single seal member for sealing between the tube sheet and the shell terminal member and between the tube sheet and the closure member and between the terminal member and the closure member. The tubes are bent in a hairpin shape with a separate closure at each end of the tubes. An opening in the end of the shell allows the tube and tube sheet to be inserted into and removed from the interior of the shell.
Abstract: An irrigation dripper unit for use in irrigation in association with an irrigation supply pipe and also, when combined with a supply pipe, to form together with the supply pipe an integral unit. The dripper unit can be connected in series with the supply pipe or, when constituting a part of the integral unit, is connected in series with the supply pipe and has means to tap off a portion of the water flowing through the unit and to discharge such portion at a low drip rate.