A chuck for tools comprises a main body in which an axial center hole and a plurality of slanting holes extending radially from the center hole are formed, a plurality of jaws each being slidably inserted in each slanting hole and formed, at its outer surface, with a male screw, a rotary member having a female screw in meshing engagement with the male screws and mounted in the main body so as to be permitted for only rotation, a first grip integrally connected to the main body, and a second grip...

A downhole shut-in tool includes in one aspect a pilot valve which when opened places a differential pressure across a piston which in turn operably engages a shut-in valve element to close the shut-in tool. An electronic timer assembly and electric drive motor are provided for controlling the action of the pilot valve. The drive motor is controlled by a load sensor which senses that the motor has stalled when an actuator engages a movement limiting abutment. In another aspect a pilot valve is p...

A wire stripping tool (FIG. 1) has outer jaws 12, 18 which can be closed together by levers 10, 16 acting via a link 24. Inner jaws 34, 36 are so closed to cut the wire sheath, and then actuator 32 is displaced left to right to move the inner cutting jaws and displace the cut sheath along the wire core. The actuator has a solely linear movement, being guided by roller 14 and pin 42, whilst jaw closing and subsequent re-opening to complete the cycle of operations is carried out by cam plate 28 wh...

A pair of salad and pasta tossing tools for operating with each other to assist in tossing salads, pastas, and similar objects, which tools have proportionally broad shaft, or handle that is an enlarged, widened gripable portion, and from which protrude several tines or pointed elements extending substantially parallel to each other at the other end. The several protruding elements, usually three in number, are generally "V" shaped. This tool is shaped to comfortably fit against the heel of the ...

Forming tools includes an upper holder; a lower holder; a punch having a punch body which can be attached to/detached from the upper holder and the lower holder; an ejector being disposed movably in a vertical direction around a convex portion provided on a face of the punch body; a resilient unit for urging the ejector, the resilient unit being provided on a back face of the punch body; a die having a die body which can be attached to/detached from the upper holder and the lower holder, the die...

A chuck for a tool is provided, which firmly fastens the working tool and can maintain the fastened state of the tool even when added vibration to be caused during operation. A plurality of jaws are obliquely provided relative to the axis of a chuck body, a grip sleeve is provided close to the rear end portion of the chuck body in unmovably fitted condition relative to the chuck body, a male screw portion is formed on the outer peripheral surface of each jaw, a nut sleeve is rotatably mounted to...

A tool for pivoting a sliding sash from a window frame which has opposed, parallel, compressible jamb liners for holding the sash in sliding engagement with the tool comprising an elongated, rigid jamb liner compression tool which has a first end for engaging one compressible jamb liner, and a second end for engaging the opposed compressible jamb liner of a sliding window, with the jamb liner compression tool having a length sufficient long to compress opposed portions of the jamb liner into the...

An improved locking mechanism for a cutting tool (1) is disclosed. The locking mechanism includes a locking block (15) transversely located through or on one handle (12) of the cutting tool (1). The locking mechanism incorporates a shaped spring (18) adapted to restrain the locking block (15) in either the locked or unlocked position. A cutting tool (1) having a pair of handles (11,12) operable to move at least one cutting blade relative to a second cutting blade or anvil and including the locki...

A drill/driver (eg. an electric drill) with a screwdriver attachment, and a method of controlling the drill/driver, are described. A control circuit (30) controls the speed of rotation of the motor (38, 39) through a time delay circuit (42) and a triac (41). The control circuit (30) uses the time delay information and information inputted from a rotational speed sensor (43) to monitor the current in the motor or a parameter related at least in part to current in the motor. When a change correspo...

An improved centralizer is provided for centralization of tubulars such as casings, liners, production tubing, and production screens, in oil/gas wells. Such a centralizer comprises a tubular body, wherein a portion of an outermost surface of the tubular body is formed from a first material, and a portion of, or portion adjacent to, at least one end of the tubular body, and/or a portion of an innermost surface of the tubular body, is formed from at least one second material, in contrast to unita...