Iti Scotland Limited

The Paton Corporation

Material Engineering Research Laboratory Ltd.

Sustainable Pipeline Systems Ltd.

Harman International Industries, Inc.

Andrew Stevenson

John Lee

Richard Allen Kreifeldt

Timothy J Shuttleworth

William A Plunkett

Bruce Vander Werf

Howard Scott Zollinger

John Harris

A sensor for measuring a characteristic of a length of a pipeline, wherein the sensor comprises a sensor length arranged to extend helically along the pipeline length; and the sensor length extends parallel to a ridge extending radially from a layer of a wall of the pipeline length. A length of pipeline with an integrated sensor length may be constructed by bending a first strip of material into a helical form that comprises a first ridge; bending a second strip of material into a helical form, wherein the second strip of material comprises a second ridge; forming a tubular shape from the first and second strips of material, wherein the first strip of material at least partially surrounds the second strip of material, and the first ridge engages the second ridge; and wrapping a sensor length about the tubular shape.

Pipeline sensing system

The present invention provides a tubular article (), such as may be used as an oil and gas pipeline, having a longitudinal axis X comprising inner and outer separate strips () of spirally wound overlapping material each having a longitudinal axis L and first and second edges ('), in which each strip () comprises two or more longitudinally extending ridges (&#x2032;), each of which extends along said longitudinally extending axis L in parallel to each other and in which said ridges (&#x2032;) each comprise asymmetric ridges having a leading edge (&#x2032;) forming a contact portion (&#x2032;) and wherein said leading edges (&#x2032;) are each in contact with each other and further comprising a non-contact trailing edge portion (&#x2032;) which are spaced from each other by an amount G.

Tubular bodies and methods of forming same

A compression spring useful in vehicle suspension applications has an extended plateau region in its force/deflection characteristics, such extended plateau being obtained by virtue of the formation of the spring as a tubular elastomer body of progressively increasing cross-section from one end to the other provided with longitudinally spaced-apart reinforcements defining bulging instability sites therebetween. The spring when under compression undergoes bulging sequentially at these sites.

Elastomeric spring with non-linear force/deflection characteristics

The spring includes a tubular elastomeric body, preferably rubber, and a coil spring embedded in and bonded to it. The coil spring controls the occurence of symmetric bulging instablity in the body under axial load conditions. This bulging instability occurs sequentially along the length of the body between adjacent coils of the coil spring until it assumes the form of a continuous coil of elastomer.

Composite spring

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Hertfordshire, United Kingdom

Andrew Stevenson