A fitting is provided that may optionally be pulled-up to its final assembled condition by torque rather than by turns. In one embodiment, at least one fitting component includes a structure that facilitates pull-up by torque. The structure may take a wide variety of different forms.

A fitting is provided that may optionally be pulled-up to its final assembled condition by torque rather than by turns. In one embodiment, at least one fitting component includes a structure that facilitates pull-up by torque. The structure may take a wide variety of different forms.

A connector has five or six abutment surfaces for cable ducts. The cable ducts may have substantially square end faces or rectangular end faces half as large. The connector has a main body made of metal, which exhibits one or two square abutment surfaces or portions thereof, and which exhibits four smaller substantially rectangular abutment surfaces.

A sewer hose including a corrugated central body integrally joined at opposing longitudinal ends by attachment collars, a first collar defining one or more locking channels, and a second collar defining one or more lugs sized and shaped for insertion into respective channels. A method of manufacturing the hose is also disclosed, including the steps of providing mold segments sized and shaped to produce the aforementioned collar sections as well as the corrugated central body, deploying them in a molding apparatus, and injecting a polymeric material into the mold segments so as to form a sewer hose with integrally attached male and female attachment collars, negating inefficient and ineffective attachment adapters.

Losses in the connecting line between the Pressure Wave Generator and the cold head of a GM type pulse tube refrigerator, are reduced while maintaining or improving upon the desirable features of a standard corrugated hose connecting line including vibration isolation, separation distance, and mounting convenience. The basic means are to reduce the internal void volume of the convolutions in a corrugated hose in combination with reducing the number of corrugations, adding fillers to the void volumes, and vibration absorbing coatings.

A tubing apparatus includes corrugated tubing including convolutions of peaks and valleys; an electrically conductive or semi-conductive, polymer jacket disposed along an exterior length of the corrugated tubing; wherein the jacket includes a conductive material in an amount sufficient to protect the corrugated tubing from damage resulting from electrical arcing at levels of at least 9 coulombs at a waveform of 10 microseconds?1000 microseconds.

The present invention discloses a compressor comprising: an outer pipe being connected from an outside to pass through the vessel; an inner pipe being closely inserted into the outer pipe; a compression mechanism including a suction hole formed of a blind hole and a suction valve in the suction hole. The suction valve includes a seal on a side facing an opening of the suction hole to seal an entire end of the inner pipe on a side facing the suction valve when the compressor stops.

A circular sheet metal duct having a sealant applied across the longitudinal seam. The sealant will improve the efficiency and will reduce or eliminate air leakage from the longitudinal seam. The sealant is applied during the manufacturing processes so that an installer does not have to seal the duct work. The method of manufacturing the sealant is provided.

A threaded joint is adapted for tubes where the stress or the strain concentration hardly occur at a threaded corner portion of box side even when the threaded joint receives repeated tensile-compressive forces or repeated bending forces. In a radial seal type threaded joint, tensile efficiency TE (%) defined by a ratio S.sub.c/S.sub.p between a cross-sectional area S.sub.c, an area of Critical Cross Section (CCS) including a portion where a tensile stress and a strain become the highest in a tube circumferential cross section of a box and a cross-sectional area S.sub.p of a tube body satisfies formula TE (%)2.25t/+99.9 having a ratio t/ between an internal thread height t of the box and a radius of curvature of a corner portion of internally-threaded bottom load surface side.

A thermally insulated pipe for transporting fluids, being connectable to at least one further pipe, is disclosed herein. The pipe comprises an outer pipe wall and an inner pipe wall substantially parallel to the outer pipe wall and configured to contain a fluid within the pipe. The inner pipe wall comprises a body portion and a connection portion extending therefrom, a thermal insulation layer provided between the outer pipe wall and the body portion of the inner pipe wall, and at least one male joinable end. The male joinable end comprises the connection portion of the inner pipe wall which terminates in a connection component adapted to engage a connection component of a further pipe, and a transition region where the outer pipe wall tapers continuously inwardly to meet the connection portion of the inner pipe wall.