A tubular liner for a pipe is collapsed on itself to define a pair of lobes. The lobes are folded into a central region so that bending modulus and radius are reduced. The liner can be stored in a tighter coil and can be introduced into an underground pipe to be lined at a more acute angle.

Reinforcement of buried or inaccessible existing pipes is achieved by applying a reinforcement layer which includes a fabric portion. A pipe system structure is achieved which permits an internal or external surface of an existing pipe wall to be reinforced without removing a section of the pipe and without requiring the pipe to be out of service of a long period of time. The reinforcement layer overlays a portion of the internal or the external surface of the pipe. An adhesive material is then ...

There is provided an insulation kit comprising an inner waterproof layer for contacting a pipe to be insulated. On the outside of the inner waterproof layer there is insulation. Then, on the outside of the insulation there is a protective layer to guard the insulation from being damaged by rock, hammer blows, knife marks and the like. The insulation kit can be taken to the field and applied to the exterior of the pipe in a relatively short period of time. The electrical fusion wire can be activa...

The preferred embodiment of the invention is a fluid pressure alleviating pneumatic or hydraulic system component. The invention is comprised of a diaphragm, carrier and a release mechanism. The diaphragm is attached to the carrier. The release mechanism bears against the diaphragm and positions it such that fluid pressure on the surface of the diaphragm produces only or primarily shear force at the connection between the carrier and the diaphragm. The connection and parts have sufficient streng...

A hydraulic accumulator, especially a piston accumulator includes an accumulator housing (10) and a separating piston that can be longitudinally displaced in the accumulator housing (10) and divides two working chambers (12) inside the accumulator housing (10). The housing is sealed on each end by one cover part (16). At least one cover part is fixed, on one side (32) by a free longitudinal edge (34) of the accumulator housing (10). The edge is arranged against the cover part (16). By connecting...

A cylindrical rod 20 is formed by bending sheet metal 10 so as to bond together a pair of edges 12 and 14 of the sheet metal 10. The cylindrical rod 20 includes therein (i) convex portions 16 each of which protrudes from the edge 12 and includes a sub-portion whose width is larger at a side thereof more distant from the edge 12 than at a side thereof less distant from the edge 12, and (ii) concave portions 18 which are formed on the edge 14, have a shape complementary to the shape of the convex ...

The invention relates to an insulation system for pipes, containers, ventilation ducts and like installation parts which have an outer surface temperature which periodically is below the dew point of the ambient air. The insulation system comprises a thermally insulating layer and a vapour barrier arranged on one side of the thermally insulating layer. The insulation system has a hygroscopic material which is arranged between the vapour barrier and the thermally insulating layer, which hygroscop...

A compression plug system for plumbing, comprising a plumbing pipe, a slip nut, a seal ring, and a plug. The plug comprises a head having a closed end, and an external threaded portion having an edge. Extending from the head is the external threaded portion that extends to the edge. The external threaded portion has a cooperative dimension to engage with an internal threaded portion of the slip nut. The plug also has an internal wall that extends from the edge until an internal end. The plug fur...

A pressure restrictor for use with a pressure sensing element comprising a cylindrical member of a given diameter and length having a plurality of apertures directed from a first end to a second end is disclosed. A pressure restrictor housing holds and positions the cylindrical member in close proximity to the pressure sensing element at the second end by clamping the pressure restrictor between the housing and element. The apertures provided in the pressure restrictor are the sole path for appl...

A flow regulator (50) having a controller housing (1) which has a central body (3) in a passage channel (2) is provided, with the central body (3) being bounded by an annular throttle body (4) made from an elastic material that delimits a control gap (6) between itself and an adjacent peripheral lateral surface (5) which is provided with control recesses (7, 7') that are spaced apart from one another in the circumferential direction and are oriented in the flow direction (Pf1, Pf2), with the pas...