Abstract: A push-fit connector for joining a fluid line to a pipe. The pipe has a retaining rib, and the push-fit connector has an angled pipe section. One end section of the angled pipe section can be connected to the fluid line and the other end section can be fitted to the pipe in only one relative rotational position by using a pair of retaining arms which can engage with the retaining rib when the pipe and pipe section are fitted together. To join the pipe section and the pipe together in a torsion-resistant manner at different relative rotational positions, the pipe section is fitted in a locking manner to a coupling ring. The coupling ring has retaining arms to connect one coupling ring, together with the pipe section, to the pipe. The coupling ring and the pipe section are protected from relative rotation with respect to each other by teeth which can be mutually engaged at different rotational positions of the pipe section and coupling ring.

Abstract: A push-fit connector for joining two fluid lines (1, 4), one of which is provided with a retaining rib (2), has a sleeve (5) with radial apertures (12, 13). A latching device (6) which can be inserted into the sleeve (5) has retaining arms each provided with a hook (20) for gripping behind the retaining rib (2) and a radially external inclined surface (21). When the sleeve (5) and latching device (6) move apart, the inclined surfaces (21) are compressed against a front edge of an aperture (12) receiving the hook (20) in an axially displaceable manner, so that the hook (20) stays correspondingly more tightly engaged with the retaining rib (2). When the latching device (6) and the inserted fluid line (1) are pulled apart, a radially internal inclined surface (23) of the hook comes into contact with the retaining rib (2) so that the retaining arms (18) are spread apart and make uncoupling possible.

Abstract: A quick connect coupling for connecting two fluid conduits has a coupling ring form-lockingly connected to a sleeve which embraces the first fluid conduit between two corrugations and is provided with elastically flexible retaining arms. The arms can grip a radial securing surface of the second fluid conduit upon axial engagement of the fluid conduits to form an axial connection therebetween. A sealing ring is arranged in an annular space delimited by the mutually engaged fluid conduits, an inner shoulder of the second conduit and the front corrugation. The second conduit has a conical flank which widens radially towards its free end.

Abstract: The present invention is a thermoplastic pipe nipple for connecting a flexible fluid conduit to a tank, comprising a first elongated tubular portion with a first end for engaging the conduit, and a second end for engaging a second portion of the nipple. The second portion is attached to the tank. The first part preferably consists of a reinforced polyamide, and the second part preferably consists of a non-reinforced high density polyethylene. The first part has a lower tendency to deform under load than the second part.

Abstract: A fluid coupling wherein a tubular coupling member has a first terminal sealingly engageable with an end of a first conduit and a second terminal sealing engageable with an end of a second conduit. The end of the second conduit has a radially outwardly extending retaining flange and the coupling member has a set of radially movable resilient arms which engage the flange when the second terminal is in proper engagement with the end of the second conduit. The arms can be prevented from becoming accidentally disengaged from the flange by one end portion of a sleeve which is reciprocable along and surrounds the coupling member. The sleeve can be releasably locked in a release position in which the arms are free to become disengaged from the flange and/or in a locking position in which the sleeve prevents disengagement of the arms from the flange.

Abstract: A clamp, especially a hose-clamp, wherein a band with overlapping end portions has a radial outer end portion having a first closure element and a slot. The slot extends in a circumferential direction along the clamp. The radial inner end portion has a projection and a second closure element, which when closing the clamp comes into a locking mechanism engagement with the first closure-element. The projection can be inserted into the slot and can be locked in this position. In order to avoid the danger of locking the projection at its insertion into the slot, and to assure that the end portions retain their required relative position when applying tension to the clamp, the projection is a circumferentially extending bar and the slot has a pair of flaps on opposite edges of the slot and protruding into the slot. The bar has notches which are provided for the radial passing of the flaps and the bar is shorter than the slot of the clamp in a circumferential direction.

Abstract: A coupling device which separably connects the end of a hose to the end of a pipe has a sleeve one end portion of which is connectable to the end of the hose and the other end portion of which has axially parallel resilient radially movable prongs serving to establish a form-locking connection with an external rib on the end of the pipe in response to insertion of the end of the pipe into the other end portion of the sleeve. A locking ring which is reciprocable on the sleeve between a retracted position and an operative position has axially parallel arms which overlie the prongs in the operative position of the ring. A C-shaped indicator of the condition of the form-locking connection has tongue-like male detent members which extend into sockets provided therefor in the prongs when the ring is held in the retracted position and the end of the pipe is not in form-locking engagement with the prongs of the sleeve.

Abstract: One end portion of a pipe, which has a circumferentially extending external bead at the one end portion, is insertable into the internal sockets of an array of arms which are axially movably received in one end portion of a sleeve. The arms have external surfaces which cooperate with an internal surface of the sleeve to permit limited axial movements of the arms between first and second positions. When in the first positions, the arms can be flexed radially outwardly to thus permit insertion of the bead into or its extraction from the sockets. The internal surface of the sleeve and/or the external surfaces of the arms can but need not be conical, either entirely or in part. The sleeve can be inserted into a bore or hole of a nipple on a radiator or carburetor in a motor vehicle. One or more O-rings or other suitable sealing elements are installed between the sleeve and the external surface of the one end portion of the properly installed pipe.

Abstract: A fluid coupling wherein a tubular socket has a first terminal connectable with a first pipe and a section for reception of a section of a tubular plug further having a second terminal connectable with a second pipe. The axial passage of the socket contains a first normally closed valve, and the axial passage of the plug contains a second normally closed valve. The two valves open each other in automatic response to insertion of the plug section into the socket section, and each valve closes in automatic response to extraction of the plug section from the socket section. The seat of each of the two valves is a press fit in the respective passage.

Abstract: A device for separably coupling one end portion of a rigid or elastically deformable hose to a nipple has a first tubular element which is non-rotatably and sealingly secured to the one end portion of the hose, and a second tubular element which is rotatable on the first element and carries first detent members separably engageable with one or more second detent members on the nipple. Engagement of the first detent members with and/or their disengagement from the second detent member or members on the nipple merely necessitates rotation of the second tubular element relative to the nipple and relative to the first tubular element, i.e., the hose need not be twisted and/or otherwise deformed in order to couple it to, or to disengage it from, the nipple. A sealing ring is provided to automatically engage the first tubular element and the nipple when the first detent members are properly connected to the second detent member or members.

Abstract: A hose clip which comprises a flexible strap adapted to be placed around a selected portion of a hose and to be tightened around such selected portion by turning a bolt or screw. An elongated concavo-convex strip-shaped resilient insert is adjacent a portion of the internal surface and extends in the circumferential direction of the strap opposite the mechanism which serves to increase or reduce the effective length of the strap. The convex external surface of the insert is biased in a direction away from the adjacent portion of the internal surface of the strap by one or more springs which are disposed between the insert and the strap and are of one piece with the insert. At least one end of the insert is slidable along the strap. The spring or springs ensure that the strap does not become loose as a result of aging of the material of the adjacent portion of the hose.

Abstract: A screw can be driven home in response to the application of a preselected torque by placing over the head of the screw a tubular first section of a plastic adapter wherein the first section is connected with a polygonal second section by a frangible joint. The joint breaks in response to the application of preselected torque to the second section, and the separated second section then exposes a destructible diaphragm which is provided in the first section and overlies the head of the screw. The head can be engaged by the working end of a tool in response to at least partial destruction of the diaphragm. The first section can be of one piece with the head or it can be affixed thereto by an adhesive or is in mere frictional engagement with the head.

Abstract: A coupling for pipes having confronting ends with conical or flat outwardly extending flanges utilizes an elastomeric sealing ring which is placed between the flanges and a variable-diameter clamping device which is positioned to surround the flanges and has two radially inwardly divergent sidewalls each of which is adjacent the exposed side of one of the flanges. The conical radially inner portions of the sidewalls engage and penetrate into the external surfaces of the pipes in response to a reduction of the diameter of the clamping device, and any further reduction of the diameter entails a movement of progressively larger parts of radially outer portions of the sidewalls into engagement with the exposed sides of the adjacent flanges to bring about radial compression of a large portion of the sealing ring.

Abstract: A hose coupling wherein a sleeve is made of one piece with axially parallel elastic arms engageable with an external rib of a pipe which is inserted into one end portion of the sleeve. The other end portion of the sleeve is sealingly connected with and surrounds an end of a hose, and the sleeve is surrounded by a turnable or axially movable locking ring having prongs which are caused to bear against the adjacent arms so that the arms are urged against the rib. The sleeve has one or more elastic tongues which can snap behind the adjacent portion or portions of the locking ring to hold the ring in the operative position and to indicate that the ring is maintained in the operative position. The arms have internal grooves for reception of adjacent portions of the rib.

Abstract: A hose coupling wherein a tubular connector has a first portion with an internal annular wall and an internal annular protuberance, and a cylindrical second portion. The protuberance is located between the wall and the second portion, and the first portion has axially extending elastic arms with pallets which can engage an external rib of a pipe when the terminal portion of such pipe is introduced into the first portion. A thin-walled metallic sleeve has a larger-diameter first section with a free end which is receivable in an annular socket of the wall after having passed within and beyond the protuberance upon entering through the open end of the second portion of the connector. At such time, the first section deforms and/or is deformed by the protuberance.

Abstract: A device for simultaneously coupling two pipes with two hoses has a discrete tubular connector for each hose, and each connector has flexible arms with pallets which can engage external retainers on the pipes. The connectors are more or less permanently secured to the respective hoses and are separably connected to each other by a flexible holder having C-shaped collars receivable in external grooves of the connectors and one or more flexible webs which connect the collars to each other. The flexible holder compensates for eventual departure of the distance between the pipes from an optimum distance and/or for absence of exact parallelism of the pipes with one another. When a connector is separated from the holder, it can be used as a constituent of a simple hose coupling, namely to connect the end portion of a hose to a nipple, to a pipe or another tubular component.

Abstract: A tool for the application of selected torque to the polygonal head of a bolt, to a nut or to an analogous component has a first portion which is a snug fit on the polygonal part of the component, and a polygonal second portion which can be engaged and rotated by a wrench. The material of the tool is more readily deformable than the material of the component and the material of the wrench so that the wrench deforms the second portion and/or the component deforms the first portion of the tool when the component offers a selected resistance to further rotation, i.e., in response to the application of a selected torque to the component. The first portion can be bonded or molded to the torque-receiving part of the component to be rotated, and the second portion can be coated with a film of a color different from that of the second portion to facilitate visual determination of the condition of the second portion.

Abstract: A hose clip wherein a flexible annular strap can be place around one end portion of a hose and a relatively small portion (less than 50 percent) of the inner side of the strap is overlapped by the convex external surface of a deformable insert. The space between the insert and the strap confines one or more springs, or one or more springs are outwardly adjacent the strap, to bias the concave internal surface of the insert against the adjacent portion of the hose. The strap can constitute an endless ring or it can be of finite length and the hose clip then comprises a tightening mechanism for the strap. The insert can be biased by one or more leaf springs, by one or more C-springs or by one or more coil springs. The spring or springs can be caused to store more energy than required to maintain the hose in sealing engagement with a pipe or nipple, and the surplus energy is then dissipated as soon as the strap is placed around the hose and the tubular body is inserted into the hose.

Abstract: A quick-release connector for a pair of conduits has a tubular male component which has a rear portion insertable into a first conduit, a front portion, an annular external protuberance between the front and rear portions, and several equidistance axially parallel disengaging members which cross the protuberance and have projections at their front ends. A tubular female component of the connector has a rear part which is insertable into the other conduit and a front part with equidistance axially parallel resilient arms, one for each disengaging member. The arms have internal detents which can engage a radial rear flank of the protuberance when the front portion of the male component is inserted into the front part of the female component.

Abstract: A coupling which serves to fluidtightly and separably connect the nipple at one end of a pipe with an end portion of a flexible hose has a sleeve with a first section which is insertable into the end portion of the hose and a second section form-lockingly or integrally connected with the first section and provided with axially parallel flexible prongs having openings for reception of discrete projections at the exterior of the nipple. A tubular clamping member is or can be integrally connected to and cooperates with the first section of the sleeve to sealingly engage the end portion of the hose. One or more sealing rings are inserted between the sleeve and the exterior of the nipple when the latter is received in the sleeve so that its projections enter or can enter the openings of the respective prongs.