There are disclosed several embodiments of an inflatable tool of the type comprising a mandrel adapted to be raised and lowered within a well bore and an inflatable element including a sleeve of elastomeric material surrounding a tubular section of the mandrel and anchored at its ends to upper and lower heads which are disposed about the tubular section and relatively movable longitudinally toward and away from one another, upon inflation of the sleeve, as well as substantially flat reinforcing ...

The invention relates to a cutting tool containing 25-33 percent by weight of Co and certain amounts of W, Mo, C, B, Zr, Si, Mn, Cr, Ni and Fe containing normal contaminants, W + 2Mo being equal to 20-40 percent by weight, the structure of the tool consisting of a martensitic matrix having a grain size of 5-70 .mu.m, determined as austenite grain size, containing 5-15 percent by volume of an intracrystalline, very homogeneously distributed fine-disperse phase consisting of an intermetallic compo...

It is an object of the invention to provide a technique to effectively prevent a power tool from being adversely affected when a battery is removed from the power tool. According to the present invention, a power tool is provided that includes a tool bit, a motor that drives the tool bit, a body that houses the motor, a battery detachably coupled to the body so as to supply driving current to operate the motor, a control device that controls the operation of the motor and a power circuit that le...

Power tool 1 may include table 5 on which work W is positioned. A portion of a circular blade 3 protrudes above table 5. Circular blade 3 may be driven by a motor. The motor may be controlled by a control device 90. Work W is cut by means of an operator sending work W positioned on an upper face of table 5 in the direction of the circular blade 3 while circular blade 3 is being driven by the motor. Power tool 1 may include first radar device 86 and second radar device 87 for monitoring a predete...

A detector is disclosed that detects impact sounds, e.g., a hammer striking an anvil or oil pulses from an oil unit. The detector may comprise a receiver that selectively converts sound within a narrow frequency range into electric signals. Preferably, the impact sounds fall within the narrow frequency range of the receiver. A processor may be utilized to control the motor in order to stop the rotation of the hammer when a pre-determined number of impact sounds has been detected by the detector....

An electrically powered hand tool is disclosed. The tool includes a motor, a power source, a work element and a controller. Various alternative features, embodiments and operative configurations are disclosed.

A machine for machining sheets comprises an arrangement for compressing the sheets to be machined. The arrangement is rotatable about a longitudinal axis comprises at least two rollers for bearing resiliently against the sheets during machining, each of which rollers are rotatable about a transverse axis perpendicular to said longitudinal axis. The arrangement is driven by a motor via a pinion, which motor also drives reduction gearing connected to an angular control means whereby it is possible...

A hand tool according to the present invention comprises in combination, a workpiece assembly and a handle assembly adapted for quick release coupling to one another to provide a manually supported tool having rapidly interchangeable workpieces. The workpiece assembly includes a work head adapted to function as a painting or decorating tool or the like and a support member on the head. The support member has a section of its length disposed rearwardly from the head which extends in a tortuous pa...

A rotary tool for working in a cramped and possibly hostile environment. The tool can be clamped into position and left to work automatically. The tool has a resiliently biased pin and a ratchet driven cam for ensuring that the working unit cannot become overloaded. Working cannot go beyond a preselected level owing to the action of the ratchet driven cam which is only stepped to a certain level on a flange which strikes a lever when that level is reached. The work done can be cutting, welding p...

Fastener tools having a rotatable output member to which a fastener engageable component can be attached, a motor for rotating the output member, and a transducer for measuring the torques to which fasteners are tightened by the tool.