摘要:
An improved means for making up and breaking out sections of drill pipe is disclosed herein. The make-up and breakout system is adapted for drill rigs having powered rotaries and powered carriages for moving the rotary up and down the mast. A wrench is mounted to the carriage for gripping the first section of the pipe. Slips are mounted at the work table for gripping the second section of pipe to support the string of pipe and prevent its rotation. The wrench is powered independently of the rotary, and the wrench and rotary can also rotate a certain amount with respect to each other while the wrench is gripping the first section of pipe. The independent power of rotation allows the wrench to breakout the first section from the second section. It also allows the rotary to breakout the first section from the rotary while the wrench restrains the first section from rotation.
摘要:
The iontophoretic device of the present invention comprises (a) a source for providing an electrical signal, (b) an electrode mounting block having a plurality of separate openings formed therein in spaced-apart relation from one another, with each of the openings configured to receive an iontophoresis electrode, (c) a plurality of iontophoresis electrodes electrically connected to the source and capable of transmitting electrical signal, each of the iontophoresis electrodes having a skin contact surface and each of the iontophoresis electrodes being received in one of the openings formed in the electrode mounting block, (d) a signal distribution network electrically connected to both the source and each of the plurality of electrodes and configured for distributing a electrical signal to each of the plurality of electrodes, and (e) a receiver connected to the source for accepting electrical signal transmitted by the plurality of electrodes, with the receiver of sufficient capacity to simultaneously accept electrical signal transmitted by each of the plurality of electrodes.
摘要:
Novel hair holding devices having first and second pivotally connected body members including hair gripping portions, and methods for improving existing such hair holding devices, in which the improvement involves providing the first and second body members with at least one elastomeric member for biasing the first and second body members into a closed position and for conforming to gathered strands of a user's hair when the hair gripping portions come into contact with gathered strands of a user's hair.