The invention relates to a shut-off fitting comprising a housing which is connected to an adjacent pipeline in a pressure tight manner, the diameter of said pipeline defining a tubular passage in the housing. Said fitting also comprises at least one closing body which can be displaced between an open position and a closed position. The inventive shut-off fitting is characterized in that the at least one closing body can be displaced by an articulated mechanism, by means of an actuator which can be vertically displaced in relation to the flow direction, in such a way that it is arranged outside the tubular passage in its open position. The closing body has a contour which is adapted to the contour of the tubular passage, in the open position, and is located on the tubular passage in a radially sealing manner.

1. A hingeable pipe clamp for detachably holding or holding together parts, such as rods, pipes, tubes, pipe sections or the like, the pipe clamp having two pipe clamp parts pivotably connected together by a hinge and each having a one-piece strip, the strip forming the half-shell, one or more gudgeons, and the flange of the respective pipe clamp part, a hinge pin being inserted in the gudgeons of the two pipe clamp parts, characterized in that the strip (27; 27') is arranged in a two-ply manner in the region of the flange (23; 23') and the half-shell (24; 24') of the respective pipe clamp part (22; 22'), and in that these two layers (31, 31'; 32, 32') are connected together by at least one single-ply region of the strip (27; 27') curved to form a gudgeon (26; 26').

The invention relates to a plastic pipe (1) comprising at least one connecting point (2) for connection to another plastic pipe (3) or to another connecting piece, wherein the connecting point (2) has a sealing area. A reinforcement (5) is applied to the connecting point (2) in the sealing area and substantially or completely prevents the plastic of the connecting point (2) from creeping in the sealing area. The invention also relates to a method and devices for producing a corresponding plastic pipe.

Method for sealing brickwork of an opening for passage of a pipe in which swelling clay, especially bentonite (8) is forced under pressure and in a gel form in front of or around the wall (4) or opening for passage of a pipe.

A method for widening a plastic or plastic-metal composite tube (10) involves (a) inserting an expandable smoothing bush (28) between a sizing tool (12) with several disengageable expanding segments (20) and the tube (10) and (b) widening the tube (10) by disengaging the segments (20) inside the bush (28) while preserving the homogeneity of the inside of the tube (10). Independent claims are also included for (1) a tube-sizing tool as above, with (a) several expandable segments (20) in a rotationally-symmetrical arrangement, which can be moved radially between an engaged position for insertion into the tube and a disengaged position for widening the tube and (b) an expandable smoothing bush (28) which can be inserted between (20) (engaged position) and the tube and then removed after widening the tube (2) a fitting for connecting tubes as above, comprising (a) a fitting body with a supporting bush onto which the widened end of a tube can be pushed and (b) an expandable smoothing bush for widening the end of a tube with a sizing tool as above.

A method of manufacturing a fastener product includes continuously introducing a sheet of preformed material to a gap defined adjacent a peripheral surface of a rotating mold roll. A lane of resin is also introduced into the gap with the lane overlapping a longitudinal edge of the sheet. The resin is pressed against the sheet in the gap, such that the resin becomes permanently bonded to the sheet, while an array of stems is molded from the resin in the thicker region, the stems extending from a base portion of the resin. Engageable heads are formed on the stems to form fastener elements. The gap is configured with a step in thickness, the step defining a boundary between a relatively thicker gap region and a relatively thinner gap region, the sheet of preformed material being introduced to the gap with its longitudinal edge disposed within the thicker gap region.

A flexible pipe formed by multiple layers of different materials, and one or more vent passages are provided in one of the layers for venting any gases permeating through the pipe.

The invention relates to a pipe which is intended, in particular, for an air intake circuit in a motor vehicle engine. The inventive pipe is characterised in that it consists of a structure comprising at least: an inner layer (10) which is made from a polar material that is at least partially formed from an elastomer selected from ethylene and acrylic acid copolymers, ethylene and vinyl acetate copolymers or acrylate polymers; a flexible outer layer (16) which is formed from an apolar material such as an EPDM; and an intermediate layer (12) which facilitates the adhesion between the inner and outer layer (10 and 16).