Abstract: The self-adjusting pliers have a male handle (6) and a female handle (11) with toothed jaws (10), (13), capable of sliding by means of a slip-joint or crimping pawl (14) that crimps them and slides in a window (8) with teeth (9), which is attached to one of the toothed jaws. Both handles (6), (11) are joined together by means of a rod (15) and an opening/closing spring (5) which joins the rod (15) to one of the handles (11). It has an additional spring (m) which is antagonistic to the opening/closing spring (5), attached to the crimping pawl (14) and lying against the surface (31) of the window (8) opposite the teeth (9) of this window (8).

Abstract: Improved adjustable pliers, of the kind comprised of different bodies bearing the jaws of the mouth, and which pivot together on an axle-pivot, which moves in a groove, foreseen in one of the bodies, which has monodirectional teeth on one of its larger walls, mounting a catch, on said axle-pivot foreseen in the other body, which defines combined monodirectional teeth and an operating arm to release these teeth at the user's will. This catch has a spring, whose aim is to keep it in a fastened position, until the catch arm is activated.

Abstract: Self-adjusting pliers, consisting of a male handle member and a female handle member with toothed jaws, sliding against each other by means of a pawl which connects them and slides in an elongated racked slot inserted in one of the toothed jaws, both handle members being joined together by a coupling link consisting of two sleeves (1), (2) which move against each other telescopically, one of them (2) pivoting on the male handle member (6) and the other on the female handle member (11); one spring (3) connecting both sleeves (1), (2) and a second spring (5) connecting one (1) of the sleeves with one (11) of the handle members.Suitable for application in the manufacture of hand tools.

Abstract: Pipe clamping device on manual pipe cutters, in which there are two bearing points for the pipe on the head of the pipe cutter, a lever being pivoted on the head of the pipe cutter with a head for its bearing in working position on the pipe and a toothing for its locking with a pawl, and a spring is placed between the lever and the head of the pipe cutter, which tends to position the lever in open position.

Abstract: The device uses a diaphragm cover between the adapter and the die to lock the die into the adapter. The cover is rotatably mounted onto the adapter and has a polygonal bore that matches the polygonal bore of the adapter. The mandrel of the die has a throat in which the cover sits when the cover is in the locked position. The cover is biased with a spring into the locked position. Stops are provided to limit the movement of the cover between the open and closed positions.

Abstract: A ratchet die stock comprised of a main body from which there protrude two parallel portions each possessing a hollow, and where such hollows accommodate a ratchet and pawl to provide unidirectional travel of the dies which are assembled in the head of the main body, and accommodate a telescopic handle, with one of such portions being tangentially positioned with respect to the head.

Abstract: A self-opening diestock which is characterized by the fact that it comprises a rotating operating part which carries the thread-cutting dies that are capable of radial travel and have two grooves in which are accommodated the heads; means for exerting an outward thrust upon the cutting dies; means for restraining the cutting dies, where both said means are embodied onto the operating part; a flange which is capable of axial travel and carries the head of the means for restraining, and a stop piece attrached to the flange, which is capable of axial travel, and upon which the end of the pipe to be threaded rests.