A flange connection for rectangular air-conditioning ducts has four hollow open-ended frame members which fit rigidly on the ends of the duct walls. The legs of separate elbows fit into the openings. Spacers are provided at the corners of the elbows on offset plates. The spacers cause the sealing surfaces of opposite frame members to be pushed towards a sealing plane when nut and bolt fastening means press opposed elbows towards each other.

A pipe connection comprising a main pipe and a branch pipe, the branch pipe being screwed into a sealing sleeve provided with an internal screw thread. The peripheral end part of the sleeve situated in the main pipe is adapted to the wall part surrounding the opening in the main pipe and is of a substantially uniform thickness.

An insulated electrical connection block, comprising a housing which encloses interconnected sleeve-shaped contact means, the contact means comprising a pair of abutting conductive sheets formed with respectively opposed radial grooves to define the sleeve-shaped contact means. The housing is formed in two cover-shaped halves which provide recesses adjacent the outer ends of the contact means.

A hose connection between a hose and a tubular member, such as a nipple and the like, in which the tubular member includes a first enlargement adjacent its mouth portion and a second enlargement more remote from this mouth portion, whose diameter is preferably smaller than that of the first enlargement; a ring surrounds the hose, in turn surrounding the tubular member, and presses the hose against the flank of the first enlargement remote from the mouth portion; the ring, with an established con...

The swivel plug is comprised of an integral member having a ring plus ridge bearing portion, and a cylindrical contact carrying portion whose front end serves also as bearing. The member has a generally flared opening for insertion of the cable. The member is made of hard plastic, e.g. nylon and partially embedded and filled by soft plastic, e.g. polyvinylchloride.

A tubing connection comprising an elongated opening in a first tube member and a pair of opposed slots cut in the end of a second tube forming a pair of tabs which are flattened and inserted through the elongated opening. The tabs are spread to conform with the inside contour of the first tube member and a tubular insert is press fit between the spread tabs. A perforation is punched through the first tube member at a location such that it penetrates one of the spread tabs and the tubular insert....

A plug and socket connection includes helical guides at the socket for guiding mating helical pins on the plug through orifices to connection contacts protected by the orifices in the socket. The projection of each helical guide about the socket axis subtends an angle that is substantially equal to 360.degree. divided by the number of helical guides.

A sealed connection for two cylindrical members includes semi-cylindrical connector sections sized to fit about the members, to bridge the joint between the members, and to be retained in position. An over-center flexing seal is also provided between two such members, as for example pipe members.

A sealed connection for two cylindrical members includes semi-cylindrical connector sections sized to fit about the members, to bridge the joint between the members, and to be retained in position. An over-center flexing seal is also provided between two such members, as for example pipe members.

A connection of a tubular member with a flexible plastic container includes an aperture in the wall of the flexible plastic container. The tubular member is positioned adjacent the aperture, with the axis of the tubular member being generally parallel to the plane of the aperture. Lateral apertures are defined in the tubular member in communication with the aperture, and an outer wall sealingly surrounds the portion of the tubular member adjacent the aperture to prevent leakage therefrom.