Abstract: This abstract is intended only to enable the Patent and Trademark Office and the public to generally determine the nature of the technical disclosure in accordance with Section 1.72(b) of the Rules for Patent and Trademark Cases, Title 37 of the Code of Federal Regulations. This abstract is not intended to aid in the determination of the scope of any element in claim.

Abstract: A machine (10) that can clean and spray coat the inside of a hollow pipe (14) can contain a support bar (16) and associated motors (6 and 8) with a moveable carriage (12) which mounts a thermal spray coating device (28) and/or an abrasion cleaning/profiling head (30) where a programmable controller external to the pipe is capable of controlling the motors (6 and 8).

Abstract: An improved hydraulic mining tool is disclosed wherein the major components of the tool are formed as separate discrete modules, each including a high torsional strength common mounting flange which permits the modules to be interchangeably attached to one another in varying axial orientations to yield a composite mining tool structure adapted to meet the particular mining requirements of the mineral formation. The mining tool discloses axial and radial slurry inlets, both of which include means for feeding quantities of mined minerals toward the slurry pump of the tool. The feeding means may be adjusted from ground surface during the mining operation to meter the amount of material entering into the slurry pump, thereby maximizing mining efficiency in varying consistency mineral formations.

Abstract: An apparatus and method for scrubbing or removing ammonia fumes by passing the ammonia vapor through a shower of ammonia-absorbent liquid such as water in a chamber are disclosed in this invention. The ammonia vapors are absorbed by and enter into solution with the liquid, the clean air is discharged into the atmosphere, and the solution of ammonia and liquid is disposed of in an appropriate manner. Preferably, a portion of the solution is recirculated to absorb additional ammonia in the chamber while the balance is discharged; and fresh make-up liquid is added to prevent the solution from becoming fully saturated with ammonia or from losing its effectiveness in the scrubbing process. The apparatus includes a cabinet, air transfer means, a shower chamber and means for producing a dense shower of liquid droplets, liquid circulator and discharge means and control mechanism to maintain absorbent liquid within the system.

Abstract: A marine riser, which is hung from a drilling platform floating on a body of water and connected at its lower end to a wellhead, is buoyantly tensioned by one or more float cans with open bottoms. These float cans are connected at their upper end to the riser to which air under pressure is controllably supplied. The pressurized air blows out the water in each can to achieve the desired buoyancy. The float can may having an air dump valve interconnected with similar valves in the other cans. The function of these valves is to release the pressurized air in the can if the riser parts. At the upper end of the riser is a slip joint, which may include safety water-dampening gear to further reduce upward motion of a parted riser. The optional dampening gear comprises an annular piston formed by the upper section of the slip joint that forces water through ports in the exterior of the lower section of the slip joint as the riser below the slip joint moves upward.

Abstract: Electronic circuitry for charging batteries is designed to charge the cells at a relatively high charging rate through a charging path which includes a semiconductor switching means, e.g. a transistor. Control circuitry is provided including a shunting controlled rectifier which is triggered into conduction when the battery has reached its nearly fully charged condition, thus shunting current away from the battery and preferably latching the transistor into non-conduction. A lower rate, trickle maintenance charge is provided by way of a resistor shunt across the switching means. The effect of temperature on the shunt controlled rectifier gating requirements is used in a positive manner to automatically latch the transistor into non-conduction as the cell approaches its fully charged condition while simultaneously preventing overcharging by tapering the battery voltage to a suitable level.