Patent application number | Description | Published |
20080261743 | ECCENTRIC GEAR MECHANISM AND METHOD OF TRANSFERING TURNING FORCE THEREBY - An eccentric gear mechanism, comprising an input drive having a centric portion rotated about an axis and an eccentric portion; a movable inner ring gear having outer circumferential gear teeth, so that said centric portion and said eccentric portion of said input drive turn in one direction against said movable inner ring gear, said inner ring gear being configured in such a way that it allows an eccentric movement by said inner ring gear and transfers a given turning force derived by said inner ring gear in an opposite direction to said one direction; an outer ring gear having inner circumferential gear teeth partially engaged with said outer circumferential gear teeth of said inner ring gear, so that when said given turning force is derived by said inner gear ring in said opposite direction said outer ring gear rotates around said axis, and said outer ring gear transfers said given turning force in said one direction outwardly along said axis. | 10-23-2008 |
20090107297 | REACTION ARM FOR POWER-DRIVEN TORQUE INTENSIFIER - A reaction arm for a power-driven torque intensifier having a housing with an axis, a torque intensifier unit and a switching device for switching the torque intensifier unit between high speed/low torque and low speed/high torque, is configured for operating the switching device so that when the reaction arm is placed in a first position, the torque intensifier unit is switched to high speed/low torque and the reaction arm is usable as a handle by an operator, and when the reaction arm is placed in a second position the torque intensifier unit is switched to low speed/high torque and the reaction arm can abut against a stationary object since the high torque can not be absorbed by the operator. | 04-30-2009 |
20090107305 | FLUID-OPERATED TORQUE WRENCH FOR AND METHOD OF TIGHTENING OR LOOSENING FASTENERS - A fluid-operated torque wrench for tightening or loosening a fastener has a housing having two housing portions including a cylinder portion and a driving portion, cylinder-piston means arranged in the cylinder portion and movable along a first axis, a lever-type ratchet mechanism arranged in the driving portion and connected to the cylinder-piston means to be driven by the later, the lever-type ratchet mechanism having a ratchet turnable about a second axis which is perpendicular to the first axis, at least three connecting elements including first and second connecting elements receiving a given turning force acting in one direction during operation of the wrench, and a third connecting element receiving a turning force in an opposite direction during operation of the wrench and being equal to the given turning force acting in the one direction, so that one of the turning forces turns a fastener to be tightened or loosened while another of the turning forces is transferred to a stationary object. | 04-30-2009 |
20090188353 | SAFETY TORQUE INTENSIFYING TOOL - A safety torque intensifying tool has a housing, a torque intensifying unit providing at least two modes of operation including a first mode in which the tool operates with a high speed and a low torque and a second mode in which the tool operates with a low speed and a high torque, a grip to be held by a tool operator, an additional element acting as a handle for better gripping in the first mode in which the tool operates with the high speed and low torque and also as a reaction arm to abut against a stationary object to stop the housing from turning in the second mode when the tool operates with the low speed and the high torque, and a switching unit for switching the tool between the first and second modes and configured so that when the operator does not act on the switching unit the tool is in the second mode of operation with the low speed and the high torque, and when the switching unit is switched by the operator while the additional element acts as a handle, the tool is switched to the first mode of operation with the high speed and the low torque, until the operator stops acting on the switching unit and the tool is switched itself back to the second mode of operation. | 07-30-2009 |
20090255320 | APPARATUS FOR CALIBRATION OF FLUID-OPERATED POWER TORQUE TOOLS - An apparatus for calibration of a fluid-operated power torque tool having a housing and a drive has a non-turnable torque measuring unit for measuring a torque generated by the tool, a non-turnable abutment unit, a first connecting element configured for connecting the drive of the tool with the torque measuring unit, for measuring a torque generated by the tool when a fluid pressure is applied to the tool, an adjustable braking unit configured for providing an adjustable braking force, a second connecting element configured for connecting the housing of the tool with the adjustable braking unit to apply the adjustable braking force to the housing so as to increase a turning resistance to turning of the housing of the tool, so that when the tool is operated the housing of the tool starts turning at a force determined by the braking unit while the drive of the tool apply an opposite and equal force to the measuring unit, so that when the braking force is increased a fluid pressure required for the tool increases and the tool can be calibrated, by determining the generated torque that corresponds to the applied fluid pressure, without inertia. | 10-15-2009 |
20100011912 | Torque power tool - A hand-held torque power wrench for tightening and loosening fasteners, the torque power tool has a motor, a housing, at least one handle configured to hold the torque power wrench in a position and to pull a trigger with one hand of an operator, and a safety device operatable by the other hand of the operator, so that when it is operated by the other hand of the operator the torque power wrench is functioning to tighten or loosen the fastener, but when the only one hand of the operator is used for holding the torque power wrench in position and pulling the trigger, the torque power wrench is not functioning to tighten or loosen the fastener. | 01-21-2010 |
20100239390 | Washer and method for tightening and loosening threaded connectors - A washer for tightening and loosening threaded connectors includes an outer body having a radially inner opening larger than a diameter of a bolt and a radially outer surface adapted to absorb a reaction force of the bolt; and optionally a radially inner segment, and a spacer locatable between the radially inner segment and the nut, so that when only the radially outer body is interposed between the nut and the object for regular applications the washer functions as a reaction washer, when the radially outer body and the radially inner segment are interposed together between the nut and the object for applications when even and accurate bolt elongation is necessary the washer functions as a tension washer, and when the radially outer body, the radially inner segment, and the spacer are interposed between the nut and the object for applications when a precise bolt elongation is needed and a bolt elongation must be controlled the washer functions as a high precision washer. | 09-23-2010 |
20100269645 | REACTION ADAPTORS FOR TORQUE POWER TOOLS AND METHODS OF USING THE SAME - Reaction adaptors for torque power tools pneumatically, electrically, hydraulically and manually driven, tools having the adaptors, and methods of using the same, are disclosed. In one illustrative example, a reaction adaptor of an apparatus for tightening or loosening a fastener includes: a first force-transmitting element attachable to a reaction support portion of the apparatus; a second force-transmitting element slideably attachable to the first element; and wherein the adaptor is adjustable to abut against a stationary object. | 10-28-2010 |
20100270048 | REACTION ADAPTORS FOR TORQUE POWER TOOLS AND METHODS OF USING THE SAME - Reaction adaptors for torque power tools pneumatically, electrically, hydraulically and manually driven, tools having the adaptors, and methods of using the same, are disclosed. In one illustrative example, a reaction adaptor includes a first force-transmitting element, when engaged with a tool, being rotatable about a turning force axis of the tool; and a second force-transmitting element, when engaged with the first element, being one of rotatable about, extensible and retractable along, and rotatable about and extensible and retractable along at least a distal portion of the first element. In another illustrative example, a tool for tightening or loosening a fastener includes the reaction adaptor. | 10-28-2010 |
20110220376 | METHOD FOR TIGHTENING AND LOOSENING THREADED CONNECTORS - A method of tightening and loosening threaded connectors in an object includes threadingly connecting a nut with a bolt introduced in the object with interposition of a washer between the nut and the object, turning the nut by a tool to tighten or loosen the bolt in the object with interposition of the washer, forming the washer with an outer body having a radially inner opening larger than a diameter of the bolt and radially outer surface adapted to absorb a reaction force of the tool, optionally also with a radially inner segment engageable with a thread of the bolt and connectable to the radially outer body with a limited axial frictional movement relative to the outer body, and optionally also with a spacer locatable between the radially inner segment and the nut, interposing only said radially outer body of the washer between the nut and the object for regular applications, optionally interposing the radially outer body and the radially inner segment together between the nut and object for applications when even and accurate bolt elongation is necessary, and optionally interposing the radially outer body, the radially inner segment, and the spacer between the nut and the object for applications when a precise bolt load is needed and a bolt elongation must be controlled. | 09-15-2011 |
20120090864 | APPARATUS FOR TIGHTENING OR LOOSENING FASTENERS - Apparatus for tightening or loosening fasteners pneumatically, electrically, hydraulically and manually driven are disclosed, and in one example includes: a receiving member, rotatably supported in the apparatus for tightening or loosening, for receiving the fastener; a device for effecting rotation of the receiving member to tighten or loosen the fastener; and an apparatus which transfers a reaction force during tightening or loosening of the fasteners. The apparatus which transfers a reaction force includes: a first force-transmitting element rotatably attachable about a turning force axis of the device for effecting rotation; and a second force-transmitting element either rotatably attachable about, extensibly and retractably attachable along, or rotatably attachable about and extensibly and retractably attachable along at least a portion of the first element. | 04-19-2012 |
20130008015 | APPARATUS AND METHODS FOR TIGHTENING THREADED FASTENERS - According to a first aspect of the invention we provide an apparatus for tightening a threaded fastener including:—a pulling device, threadedly engageable with an extruding part of a shank of a fastener, which pulls the shank, the pulling device having:—a first pull setting which achieves closure of a joint; a second pull setting which substantially frees a nut from a surface of the closed joint; a turning device, engageable with the nut, which turns the nut on the shank, the turning device having:—a torque setting which turns the nut with a predetermined torque to maintain joint closure; a turn setting which turns the nut by a predetermined degree of rotation; and at least one controlling device which controls the pulling and turning devices. According to a second aspect of the invention we provide a method for tightening a threaded fastener including:—pulling an extruding part of a shank of the fastener to achieve closure of a joint; torquing a nut to maintain joint closure; pulling the shank to free the nut from a surface of the closed joint; and turning the nut substantially by a predetermined degree of rotation. | 01-10-2013 |
20130319704 | DRIVE UNIT FOR A POWER OPERATED TOOL - The invention relates to a drive unit for a power operated tool for the generation of a screw pretensioning force, with a pump unit ( | 12-05-2013 |
20140230608 | APPARATUS FOR TIGHTENING THREADED FASTENERS - Apparatus for supplying a fluid to a device for tightening or loosening fasteners including a first fluid-transmitting element ( | 08-21-2014 |