A method of repairing tires in which an assembly is formed comprising a tread strip applied to the worn surface of a tire carcass with a layer of binder material sandwiched between the tread and the surface of the carcass. A pair of annular shells are applied to the tire sidewalls and seals are formed at the inner and outer edges of the shells in engagement with the tread strip and the beads of th...

A carboxylic acid or carboxylate is reacted with an isocyanate to produce gas which is used to give a blowing action in the manufacture of a foam plastics material, especially foam polyurethane. Preferably formic acid or a formate is used.

The mold release properties of a molded polyurethane foam are improved by including the foamable mixture to be molded, a reaction product of a polysiloxane and an organic monoisocyanate or polyisocyanate.

A pneumatic tire which comprises: a tread portion; a breaker structure to brace the tread portion; two sidewalls each having an associated bead containing a bead core, and each sidewall containing a reinforcing ply of cords anchored around the bead core of the respective one of said associated beads and extending into the tread portion radially outwardly of the breaker structure to overlap at leas...

A carboxylic acid or carboxylate is reacted with an isocyanate to produce gas which is used to give a blowing action in the manufacture of a foam plastics material, especially foam polyurethane. Preferably formic acid or a formate is used.

A carboxylic acid or carboxylate is reacted with an isocyanate to produce gas which is used to give a blowing action in the manufacture of a foam plastics material, especially foam polyurethane. Preferably formic acid or a formate is used.

This invention relates to equipment which is installed in oil wells and more particularly to a tool control apparatus for a tool placed in the production string of a well. This apparatus is lowered into the well at the end of a cable (116). It comprises a first mechanism (134-148-152-154) for transforming a longitudinal reciprocating movement into an alternating rotary movement, the longitudinal m...

PURPOSE:To thoroughly prevent the local clogging of a water spraying nozzle and to stably manufacture metallic powder of enhanced quality by attaching a filter to the interior of the nozzle attached to an apparatus for pulverizing a molten metal with highly pressurized water. CONSTITUTION:A molten metal 5 drops from an opening 6 to a spraying tank 3 as a molten metallic flow 8. At this time, a hig...

An additive composition has been formulated which accelerates the setting time, and also improves the compressive strength of Portland type cement, mortars and concretes. The additive composition consists essentially of a concentrated aqueous solution of calcium nitrate and a waste byproduct stream of a mixture of polyethanolamines (referred to as "triethanolamine bottoms") to which solution is ad...

An additive composition has been formulated which accelerates the setting time, and also improves the compressive strength of Portland type cement, mortars and concretes. The additive composition consists essentially of a concentrated aqueous solution of calcium nitrate and a waste byproduct stream of a mixture of polyethanolamines (referred to as "triethanolamine bottoms") to which solution is ad...

In a vane actuation system including several actuated stages, unison rings for pairs of stages are actuated in opposite directions. The bell-cranks for actuating the unison rings are all connected to a common carrier wherein the oppositely directed loads substantially balance out so that only the difference is transmitted into the engine casing. The bell-crank actuator is also mounted on the commo...

A multiple jet aerator module or header which is formed substantially completely of fiber glass and which includes a right-circular tubular sheet-form liquid duct and a right-semicircular tubular sheet-form air duct having a radius substantially less than the radius of the liquid duct. Molded fiber glass liquid nozzles are located along the length of the liquid duct and a corresponding number of l...

This invention relates to a pretreatment process for galvanized metal which, unlike existing processes, was specifically developed for galvanized metal. Because of the natural corrosion protection properties of the zinc cladding of galvanized metal, no additional passivation is necessary as is required with existing processes. Also, the invention relates to the galvanized metal which has been pret...

A powder inhalator which is activated by the air flow generated at inhalation and which is intended for inhalation of solid pharmacologically active compound in micronized form, said inhalator comprising a nozzle 2, an air conduit 6, a dosing unit 10 comprising a storage chamber 5 for the active compound and dosing means 8, and a maneuvering unit 1, characterized in that the dosing unit 10 compris...

Apparatus/process for the withdrawal and return of liquid materials from a donor source, comprising means for withdrawing whole blood from a mammalian donor; a membranous blood filtration cell which includes a membrane separator/filter, a compartment downstream therefrom for receiving a blood plasma fraction and a compartment upstream thereof for receiving a blood cellular component fraction; cond...