Abstract: A threaded fastener has a bolt, a nut including at least one sleeve in which the bolt is threadingly engaged, and a washer having a lower bearing surface adapted to bank on a surface of one of at least two elements to be connected with one another by the threaded fastener, the washer being pressed-fit on a part of the threaded fastener, so that when an active force and an opposite reactive force are applied to parts of the threaded fastener, the washer does not turn, while the bolt also does not turn but moves only in an axial direction.

Abstract: A power tool for fastening objects has a housing with a non-rotatable element, a power drive in the housing and provided with a rotatable driving element, and a fastener part including a bolt having a thread and an axis and introducable into parts forming an object, a nut screwable on the bolt and cooperating with the rotatable driving element, and a washer to be applied between the nut and an object and cooperating with the non-rotatable element, the washer having an axis and being provided with a first bearing face surface located at one axial side and adapted to cooperate with the nut, a second bearing face surface located at an opposite axial side and adapted to cooperate with the object, and at least one third turning resistant surface adapted to cooperate with the thread of the bolt, so that when driving element turns the nut with a given active force in one direction and the washer is held stationarily applied by the non-rotatable element of the housing, the nut turns to tighten or loosen the bolt, and

Abstract: A washer to be applied between a nut threadingly connected with a bolt which has an axis and is introduced into an object including two parts to be assembled, the washer has a body having an axis and provided with a first bearing face surface located at one axial side and adapted to cooperate with a nut, a second bearing face surface located at an opposite axial side and adapted to cooperate with the object, and at least one third turning resistant surface adapted to cooperate with a thread of the bolt, so that when the nut is turned with a given torque in one direction and the body of the washer receives simultaneously the given force in an opposite direction, only the nut turns to tighten or loosen the bolt and the body of the washer remains rotation stationary while the bolt elongates or relaxes in an axial direction.

Abstract: A fastening system includes a bolt member, a nut to be turned, and a torque power tool operative for applying a torque to the bolt member and a torque to the nut to be turned simultaneously, so that during turning of the nut, the bolt member does not turn or twist due to torsion or side load, the bolt member including a rod and a washer having an axis, the rod having at least two portions located substantially at its ends, one of the portions being a threaded portion and located at one of the ends of said rod to connect with the nut to be turned while another of the portion located at the other of the ends of the rod is adapted to connect with an object, the washer having two opposite bearing faces extending substantially perpendicular to the axis and being subjected to turning friction, the bearing faces including an upper bearing face adapted to cooperate with a bearing face of the nut to be turned and a lower bearing face adapted to cooperate with a bearing face of one of the at least two parts, the torque

Abstract: A threaded fastener has a bolt, a nut including at least one sleeve in which the bolt is threadingly engaged, and a washer having a lower bearing surface adapted to bank on a surface of one of at least two elements to be connected with one another by the threaded fastener, the washer being pressed-fit on a part of the threaded fastener, so that when an active force and an opposite reactive force are applied to parts of the threaded fastener, the washer does not turn, while the bolt also does not turn but moves only in an axial direction.

Abstract: A threaded fastener has a bolt; a nut including at least one sleeve in which the bolt is threadingly engaged, and a washer having a lower bearing surface adapted to bank on a surface of one of at least two elements to be connected with one another by the threaded fastener, the washer having a smooth inner surface and being press-fit with the smooth inner surface on a smooth outer surface of a part of the threaded fastener, so that when an active force and an opposite reactive force are applied to parts of the threaded fastener, the washer does not turn, while the bolt also does not turn but moves only in an axial direction.

Abstract: A universal power tool has at least two interchangeable first housing units, at least two interchangeable second housing units, one of the at least two first housing units having a first axis and a cam mechanism to be turned by an outside power source, the other of the at least two first housing units having a cylinder-piston arrangement with a piston rod movable by fluid power, each of the at least two second housing units having a second axis perpendicular to the first axis, a lever, ratchet mechanism, different engaging structures for engaging a threaded connector to be tightened or loosened, and also having a third axis perpendicular to the first axis and to the second axis, and a structure for interchangeably connecting one of the at least two second housing units to one of the at least two first housing units, so that upon rotating the cam of the one of the at least two first housing units in one direction the cam mechanism imparts a movement along the first axis, and upon moving a piston of the other o

Abstract: A fastening device, comprising a bolt member, a nut to be turned, and a torque power tool operative for applying a torque to the bolt member and a torque to the nut to be turned simultaneously, so that during tightening of the fastener and turning of the nut, a free shank of the bolt member does not turn or twist due to torsion or side load, the bolt member including a rod and a washer having an axis, the rod having at least two portions located substantially at its ends, one of the portions being a threaded portion and located at one of the ends of said rod to connect with the nut to be turned while another of the portion located at the other of the ends of the rod is adapted to connect with an object, the washer having two opposite bearing faces extending substantially perpendicular to the axis and being subjected to turning friction, the bearing faces including an upper bearing face adapted to cooperate with a bearing face of the nut to be turned and a lower bearing face adapted to cooperate with a bearing

Abstract: A universal power tool has at least two interchangeable first housing units, at least two interchangeable second housing units, one of the at least two first housing units having a first axis and a cam mechanism to be turned by an outside power source, the other of the at least two first housing units having a cylinder-piston arrangement with a piston rod movable by fluid power, each of the at least two second housing units having a second axis perpendicular to the first axis, a lever, ratchet mechanism, different engaging structures for engaging a threaded connector to be tightened or loosened, and also having a third axis perpendicular to the first axis and to the second axis, and a structure for interchangeably connecting one of the at least two second housing units to one of the at least two first housing units, so that upon rotating the cam of the one of the at least two first housing units in one direction the cam mechanism imparts a movement along the first axis, and upon moving a piston of the other o

Abstract: A fluid operated wrench has fluid-operated drive including a cylinder, a piston reciprocatingly movable in the cylinder and having a piston rod with a piston rod end, a ratchet mechanism having a ratchet provided with a plurality of teeth, and at least two pawls operatably connectable with the piston rod end and engageable with a teeth of the ratchet so that during an advance stroke of the piston one of the at least two pawls engages with at least one ratchet tooth while the other of the at least two ratchets over at least one ratchet tooth, while during a return stroke of the piston the other of the at least two pawls engages with at least one ratchet tooth while the one of the at least two pawls ratchets over at least one ratchet tooth, [at least one of the at least two pawls being disengageable from and liftable above the teeth of the ratchet] and a disengaging unit which is activatable by an operator separately from the drive and can act on at least one pawl so as to distinguish it from and lift

Abstract: A power tool for tightening and loosening threaded connectors has a link having a link housing and a ratchet unit for turning an engaging element so as to turn a threaded connector engaged by the engaging element, a first hydraulic drive unit including a drive housing and a hydraulically movable driving element, a non-hydraulic drive unit including a drive housing and non-hydraulically moveable driving element, a first connection provided on the link housing and on the drive housing of the hydraulic drive unit and the non-hydraulic drive unit, so that alternatingly either the housing of the hydraulic drive unit or the housing of the non-hydraulic drive unit can be connected with the link housing, and a second connection for connecting the ratchet mechanism alternatingly with the driving element of the hydraulic drive unit or the driving element of the non-hydraulic drive unit, so that the driving element of the hydraulic drive unit and alternatingly the driving element of the non-hydraulic drive unit during i

Abstract: A bolt for connecting two parts with one another has a bolt member having an axis, a threaded portion provided with a thread, and another portion having a polygonal circumference, a friction washer non-rotatably connected to the polygonal circumference of the other portion of the bolt member and having a first facial area adapted to abut against a facial area of one of the two parts and also having an opposite second facial area, a sleeve connected to the thread of the threaded portion of the bolt member and having a facial area abutting against the second facial area of the friction member, means provided on the sleeve for applying a given force, and means provided on one of the bolt member and the friction washer so as to apply a given force in an opposite direction to the sleeve, so that when a given force is applied in one direction to at least one of the bolt member and the friction washer through the means on the at least one bolt member and the washer and a given force is applied in an opposite directi

Abstract: A bolt for connection two parts with one another has a bolt member having an axis, a threaded portion provided with a thread, and another portion having a polygonal circumference, a friction member connected to the polygonal circumference of the other portion of the bolt member and having a first facial area adapted to abut against a facial area of one of the parts, and also having an opposite second facial area, and a sleeve connectable to the thread of the threaded portion of the bolt member and having a facial area abutting against the second facial area of the friction washer, so that when a given force is applied in one direction to the bolt member and a given force is applied in an opposite direction to the sleeve, only the sleeve turns while the bolt member is elongated or relaxed.

Abstract: A power tool for tightening and loosening a bolt connected with a nut and a washer arranged so that the nut banks with one of its sides onto one of washer faces, the power tool comprising a housing, drive means accommodated in the housing, and at least two coaxial connecting means including a first connecting means provided for engaging and turning the nut and subjected to a turning force in one direction, and a second connecting means subjected to a turning force in an opposite direction, the coaxial connecting means being formed so that one of the coaxial connecting means is being turned while the other of the two coaxial connecting means stand still depending on a turning friction encountered as a result of one being connected with the washer while the other one is connected with the nut, or the result of one being connected with the bolt and the other one is connected with the nut, or as a result of one being connected with a reaction arm adapted to abut against an adjacent stationary object while the oth

Abstract: A power tool has a tool part having an axis and including interreacting driving and housing portions so that during an operation of the power tool the driving portion has a tendency to turn in one direction at a given force while the housing portion has a tendency to turn in an opposite direction at a same given force, a sleeve part with a first outer sleeve and a second inner sleeve connected with one another by a thread and with a friction ring axially moveably connected to the inner sleeve, so that when the outer sleeve is turned on the friction ring, the inner sleeve moves axially and displaces axially a threaded connector engageable by the inner sleeve, a first connecting element which connects the driving portion with the outer sleeve, and a second connecting element which connect the housing portion with the inner sleeve, the connecting elements being formed so that during the operation of the power tool, the inner sleeve axially displaces relative to at least one of the interreacting tool portions.

Abstract: A universal torque power tool has a housing having a motor, a driving mechanism being operatively connected with the motor, the driving mechanism including a drive having an axis and being engageable with a nut to be turned, first and second transfer members to apply a reaction force substantially coaxial with the axis of the drive and spaced from one another in direction of the axis, the drive being formed to transfer an action force from the motor to a nut to be turned, the transfer members being formed to engage a stationary object and to transfer a reaction force to the stationary object, so that when the stationary object is engageable outside of the nut engagement the first transfer member transfer the reaction force to the stationary object, and when the stationary object is engageable inside the nut engagement the second transfer member transfer the reaction force to the stationary object.

Abstract: A fluid-operated tool has a link provided with an engaging element for engaging and turning a threaded connector and turnable about a pivot axis of the engaging element, a housing, a fluid-operated drive including a cylinder-piston unit with a cylinder formed in the housing, a piston reciprocatingly movable in the cylinder and a piston rod connected with the piston, the piston rod being also connected with the link, so that when the drive is actuated by a pressure fluid the piston rod is displaced and turn the link about the pivot axis, the housing being connected with the link exclusively by the piston rod.

Abstract: For moving an element in an axial direction relative to an object, a plurality of screw members are screwable in the element and are arranged around an axis so as to be spaced from one another, each of the screw members has a first end adapted to interact with the object and an opposite second end, and a drive unit includes an action drive and a reaction drive arranged coaxially to the axis and with one another and turnable in opposite directions, one of the drives engages an outer circumference of the screw members while the other drives engages an inner circumference of the screw members so that when the power tool is activated the drives are turned in opposite directions and turn the screw members in one and the same direction to thereby move the element in the axial direction.

Abstract: In order to elongate and relax a stud, a first part which is movable only in an axial direction engages the stud, a second part is connected with the first part, a friction element is connected with at least one of the parts so that the first part has more surfaces cooperating with other elements than the second part, and then at least a holding force is applied to the friction element while an opposite active force is applied to an outer peripheral surface of the second part so that the second part is moved in the transverse direction and the first part is moved only in the axial direction to elongate the engaged stud.

Abstract: A nut has a nut member having a thread for engaging a bolt, a stud and the like and a plurality of screw members extending through the nut member and provided at its one ends with gears to be simultaneously engaged by an additional member and simultaneously turned, so as to simultaneously turn the screw members adapted to abut against an object, and to tighten or to loosen the nut. A tightening device includes the inventive nut and an element which simultaneously engages the gears of the screw members and turns them to tighten the nut.