Abstract: A thread joint to be subjected to the fluctuating load having a thread to be subjected to the tensile load from which a thread crest contact surface is cut off from the threads thereof in the direction of the tensile load, and the contact height of the same is lowered with respect to the other portion. Therefore, the maximum bending moment per unit area generated at the root of the threads is uniformed and the peak bending moment per unit area is reduced.

Abstract: The rapid fastener is adapted to achieve a connection in the axial direction and in rotation of two elements and more particularly torque-transmitting shafts. It comprises at the end of one of the elements a socket (8) which is provided with at least one helical slot (14, 16) and on which is axially slidable a ring (18) defining at least one longitudinal slot which is laterally offset relative to the entrance (14) of the helical slot. The ring (18) is biased by a spring (24) toward the entrance of the socket (8). The second element has a stem (4) provided with a driving pin (6) which, in entering the helical slot, urges back the ring but is guided under the action of the spring (24) and the edges of the two slots toward the inner end of the helical slot and is then locked in this position without clearance.

Abstract: A fiberglass pipe joint construction having threaded pin and box ends thereon. Tapered threaded portions are provided with profiles to improve alignment and sealing and prevent galling of the resinous material.

Abstract: A coupling device for releasably connecting a suction hose (15) to a vacuum cleaner housing (10) includes a tube connection piece (13) attached to the suction base and adapted to be inserted into a cylindrical socket (11) in the vacuum cleaner housing. The tube connection piece (13) is rotatably attached to a coupling sleeve (16) which carries a latch (17) which is releasably connected to the vacuum cleaner housing (10) in a non-rotatable position.

Abstract: A fitting made up of a body, a ferrule and a nut. The ferrule has a reduced size cylindrical member that is received in an end of a thin wall tube. The nut and the deformable ferrule are placed over the tube. The nut is wrenched onto the body, which deforms the ferrule at the ferrule groove displacing material of the ferrule inwardly against the tube, bringing the inner surface of the ferrule into sealing engagement with the outer surface of the tube and the inner surface of the tube with the outer reduced cylindrical surface of the body and at both faces of the ferrule. A seal is thus accomplished at the inside surface of the ferrule, forcing the tube into engagement with the reduced size member of the body, thereby reinforcing the tube.

Abstract: A connector for use in connecting a push-on mechanical bell-type pipe joint or butt-type joint together which comprises two legs positioned at right angles to each other, one of which may be welded to the surface of the male member and the other of which may be welded to the edge of the gland holding the gasket used in place, the leg attached to the male member being rotated so that the other leg being attached to the gland will readily engage the gland.

Abstract: A fitting that is adapted for use between two adjacent frame members that are mechanically isolated from one another. The fitting has two flanged members one fixed to each frame member and a pressurized liquid coolant flow channel with a pair of bellows units on opposite sides of an intermediate ring that is loosely mounted on the outer surface of a spool attached to one member.

Abstract: An assembly of prefabricated structural components for lattices or trusses includes a plurality of rod-like, load-bearing elements, a plurality of joining elements for joining the rod-like elements to one another, a plurality of connecting elements for connecting the rod-like elements to the joining elements, and a plurality of clamping elements for clamping the connecting elements and associated rod-like elements to the joining elements. Each joining element has a spherical peripheral surface provided with first and second T-grooves disposed at opposite ends of a predetermined diameter of the surface and at least one additional T-groove extending circumferentially of the surface in a plane normal to the predetermined diameter. The connecting elements resemble T-bolts and one connecting element is receivable in each first and second groove while several connecting elements are receivable in each additional groove.

Abstract: The invention refers to a structural part comprising a flange (6) and at least one exhaust gas tube (1) being inserted into a perforation (5) of the flange (6) and being connected therewith by a welding seam (11) arranged on the free end (2) of the exhaust gas tube (1), in particular to an exhaust gas bend for internal combustion engines. The end (4) of the exhaust gas tube (1) is reduced in diameter and tapers in opposite direction to the flow direction (8) of the exhaust gases. The wall (7) of the perforation (5) tapers with the same tapering angle (.alpha.) as does the end (4) of the exhaust gas tube (1). The tapering end (4) of the exhaust gas tube (1) snugly engages the wall (9) of the perforation (5) over at least part of the thickness (13) of the flange (6). The tapering end (4) of the exhaust gas tube (1) is seated within the tapering area (9) of the perforation (5) of the flange by press fit.

Abstract: A security railing is formed from thick wall polyvinyl chloride pipe (PVC) having PVC tee, cross and elbow fittings providing flush joints. A PVC joint aligner and strengthener is inserted in and extends across each joint, The joints and aligners are chemically welded to form a unitary structure. Joint aligners may include a steel core.

Abstract: An attaching socket of a working implement fits a tool shaft and has an exterior clamping device with a clamping piece, which with the clamping device in a closed condition engages in the tool shaft through an opening in a wall of the attaching socket. The clamping piece is mounted on a clamping lever which is mounted pivotable exteriorly on the attaching socket about a pivot axis extending substantially perpendicular to the sleeve axis and extends from that pivot axis substantially further than the length of the clamping piece. This clamping piece together with the clamping lever form a bent lever. The clamping lever is pivoted in against the tool shaft in the closed condition of the clamping device, while it is swung out in the open condition far enough from it so that the clamping piece is out of engagement with the tool shaft. With the clamping device closed the end of the tool shaft is braced by the clamping piece axially against a backstop formed by and in the attaching socket.

Abstract: A coupler assembly is disclosed which is adapted for interconnecting pieces of corrugated sheet material and includes a female member having a back wall and receiving portion mounted on one side of the back wall. A male connecting member couples to the female member and includes front and rear flanges, with the rear flange dimensioned to rotatably fit within the receiving portion, and so that the members may be connected in a selected rotational orientation. A hub interconnects the flanges and a flat planar tab is joined to the side of the front flange opposite the hub for insertion within corrugated sheet material.

Abstract: An elongate lock is positionable along a shaft end segment and acts on a key on the end segment to drive same outwardly into abutment with a shaft carried article. The lock and key have cooperating surfaces which translate lock movement into outward key movement with such surfaces including a rounded key surface such as a woodruff key. A threaded segment of the lock permits forceful lock and key engagement. A modified key is of pin shape.

Abstract: A fastener includes a female body and male body. By forcibly inserting the male body into a male body insertion hole of the female body, the two bodies are temporarily coupled together. By further inserting the male body into the female body from this state, leg portions of the female body are caused to flare outwardly so that overlapped plates are fastened together between the flared leg portions and a head portion of the female body. By further inserting the male body into the female body from this state, the leg portions are released from the flared state, so that the plates can be unfastened. When and only when the leg portions are inserted through a hole of a plate to be fastened by means of the fastener disposed in the temporarily coupled state, can the male body be further inserted within the female body so as to fasten the two plates to each other.

Abstract: The joint comprises a first end portion to be coupled and shaped like a sort of cup, in which a second portion, shaped like a flange, and to be joined to the first one, is insertable, wherein the second portion is internally occupied for a section by a precision seating recess, for a cylindrical element of highly insulating material, and flush to the inner wall of the conduit. The end of the cylindrical element, facing towards the bottom of the cup, has a radially directed annular projection for the constant separation of the flange from the bottom of the cup, the projection axially and sealingly engaging with an annular gasket, and being provided with a collar for the blocking therein.

Abstract: An improved tubular joint including an inner tubular member, an outer tubular member having a central bore therethrough, a counterbore extending from the open end of the counterbore and terminating in a shoulder between the counterbore and the central bore, and internal threads on the outer end of the counterbore, a sleeve positioned within the counterbore, a retainer ring threaded into the counterbore threads and retaining the sleeve within the counterbore, ribs on the interior of the sleeve and a seal between the exterior of the sleeve and the interior of the counterbore so that pressure forming of the inner tubular member forms it into tight gripping and sealing engagement with the sleeve and the sleeve is sealed within the outer tubular member to form a completed improved tubular joint.

Abstract: A quick-connect tube connector consisting of male and female parts wherein a retention system defined on the female part comprises a plurality of homogeneously formed resilient fingers which engage a shoulder defined on male part to maintain connection of the parts upon the male part being fully inserted into the female part. Both pasts are molded of a synthetic plastic material and a release sleeve may be axially displaceably mounted on the male part moveable to a release position engaging the fingers and deflecting the fingers from engagement with the shoulder permitting separation of the parts.

Abstract: A fitting for releasably connecting two plate-shaped furniture parts meeting at a right angle includes a bolt anchorable in a dowel casing in a furniture part and having a head acted upon by an eccentric bushing which is mounted without an axle in the other furniture part. The bolt is anchored in the dowel casing by a disc which is held in the dowel casing for displacement in a plane transverse or vertical to the bolt. The dowel casing has at a side thereof facing the other furniture part an opening which is of greater size than the diameter of the bolt.

Abstract: A kink resistant flexible plastic or rubber hose for spraying water is provided having a plurality of functions including resistance to hose kinking, water delivery through the hose when kinked and equalization of water pressure on both sides of the kink causing the hose to snap open. The hose is adapted for coupling to a pressurized water supply for delivery of water through the hose and a spraying device is coupled to the other end to provide sufficient back pressure for equalization and opening of the kinked hose during delivery of a pressurized stream of water. The hose is especially suited for use as a garden hose and for other water delivery purposes in boat, camper, car, patio, potable and other environments.

Abstract: A member formed of ceramic refractory material has therein an opening. A metal coupling member for attaching a metal member such as a rod or a tube, to the refractory member has an externally threaded portion extending into the opening in the refractory member. The coupling member has a head extending radially outwardly beyond the threads of the threaded portion and embedded in the refractory member. The opening in the refractory member may be internally threaded to receive the threads of the threaded portion of the coupling member.