A reaction washer is optimized for lock-on, optional stiction ring and for a predetermined indentation depth of bidirectional serrations for secure reaction torque transfer during initial and full actuation of respective nut or bolt heads resting on it. An optional lock-on ring embedded around the reaction socket is ergonomically actuated to latch on and off underneath the reaction washer. Axial offset of the peak stress areas away from the actuation socket edges provides for reduced actuation socket diameter and consequently for the entire tool and system remaining substantially within radial assembly limits established for prior art actuation sockets alone. A coupling unit is attached to and tightened on a power torque wrench via a clamp tool utilizing the power wrench's own torque. A hand hold groove and a lock able snap release button offset from the coupling castle snap connection contribute to safe and ergonomic operation and system peak performance.

The present invention relates to an operation parameter regulation unit (50) for use with a bolting system having a plurality of networked electrically powered torque tools (10, 11) and/or drive portions of torque tools (10, 11) for simultaneous tightening of industrial threaded fasteners (40), the operation parameter regulation unit (50) including: a processing unit (53); an output unit (51) connected and/or integrated with the processing unit (53); an input unit (52) connected and/or integrated with the processing unit (53); an activation unit (55) connected and/or integrated with the processing unit (53) for activating operation units of the plurality of networked electrically powered torque tools (10, 11) and/or drive portions of torque tools (10, 11); and a control unit (54) for controlling operation parameters (41) of each of the plurality of networked electrically powered torque tools (10, 11) and/or drive portions of torque tools (10, 11) to maintain a difference between the operation parameters (41) within a predetermined value.

A device, for rotationally driving an element, including a rotationally-driven member at a front of the device and engageable with, to transmit rotational drive to, the element. A formation is shaped to contact, to transmit a reaction torque to, an attachment. A rearward-facing portion is at the rear, or rearward, of the formation. An arrangement engages, to act between, the rearward-facing portion and the attachment to rearwardly urge the attachment.

An apparatus for use with a hydraulically driven torque tool for tightening or loosening threaded fasteners including an internal energy storage assembly for automatic piston return is disclosed. In one embodiment, the internal energy storage assembly operates by a pneumatic fluid which compresses during an advance stroke of a piston assembly of the tool and expands during a retract stroke of the piston assembly of the tool. In such embodiment, the internal energy storage assembly includes a hydraulic assembly and a pneumatic assembly. Advantageously it: has a higher energy density than a mechanical spring; does not have geometric limitations as the pneumatic fluid may be contained in internal volume available of the tool; and increases bolting speeds as the return stroke no longer requires hydraulic fluid to force back the piston; has reduced tool size by elimination of one hydraulic connection and location of the remaining connection that improves accessibility of the tool into the work space; requires a simplified hydraulic pump and controls; and increases bolting system reliability.

Apparatus for use with a tool assembly in operations of tightening or loosening threaded fasteners about an axis are disclosed, and in one example includes: a lower clamp assembly; an upper clamp assembly; a reaction adaptor assembly; and a spring assembly formed between the upper clamp assembly and the reaction adaptor assembly. Advantageously an operator can tighten or loosen all fasteners without having to change the initial setup of the apparatus. The lower clamp assembly eliminates the need for extra operators and heavy and bulky equipment to hold the apparatus near the fasteners. The upper clamp allows the operator to rotate the apparatus around with ease. The spring assembly stabilizes and eases vertical height adjustment of the apparatus. The reaction adaptor substantially negates reaction turning forces of the tool assembly during the operations. Drive knobs provide easy alignment of and quick and safe mounting of the tool assembly on the fasteners. Bolting operations about an axis are completed faster, cheaper and with little or no risk of operator injury.

A torque wrench assembly comprises a torque wrench and a reaction arm and locking means for locking together the torque wrench and the reaction arm. The locking means comprises a connection member located on the torque wrench; an opening on the reaction arm for receipt of the connection member of the torque wrench; a locking member slidably mounted in a channel on the reaction arm, the locking member including an aperture sized to allow the connection member to pass therethrough; and biasing means arranged to bias the locking member into a position wherein the aperture is partially aligned with the opening. The connection member has an insertion end for insertion into the opening of the reaction arm, and immediately adjacent the insertion end is a recess. The recess is shaped to receive a part of the locking member.

Interchangeable reaction washer initially penetrates with outward bottom serration edges only during manual pre tightening. Slippage is thereby avoided at begin of the consecutive power torque wrench assisted full tightening of the nut and/or bolt head resting on it. As the load ramps up, the reaction washer flattens out and the bottom serrations gradually penetrate radially inwards. Reaction and actuation sockets of varying sizes matching a broad range of reaction washers and nut and/or bolt heads may be interchangeably snapped on a reaction coupling connected to the torque wrench housing. A clearance undercut underneath the reaction washer torque receiving flanges absorbs eventual debris to further assist unimpeded and fast coupling of the system. Radially oriented contact faces between reaction washer and reaction socket provide a snug contact unaffected by their toroidal movement during washer flattening and a force transfer free of radial force components.

A multifunctional torque wrench includes a main body, an operation member, and an indication device. The main body has a driving portion, a combination portion, and a twisting portion. The driving portion pivotally drives a fastener to rotate about an axis passing through the main body. The operation member is switchable between a first position and a second position with respect to the main body. The extension portion extends along a second axis. When the operation member is at the first position, the second axis is vertical to the first axis, allowing a user to turn the main body to generate the torque for driving a fastener. The indication device is disposed between the main body and the operation member for displaying the torque value. When the operation member is at the second position, the second axis is parallel to the first axis for storage.

An adaptor for a fastener driver assembly employs a bi-positionable angle guide assembly mounted to a head having an entry reference surface defining an opening for a fastener. The adaptor provides a proper location and entry angle for the fastener for implementing various structural connections. A pivotal angle guide has a pair of reference engagement edges functionally configured to engage either an upper horizontal member or a lower horizontal member. A locator having a location reference is mounted to the guide assembly. In one mode, the reference edges, together with the location reference, define a proper entry location and normal angle for connecting a horizontal member, which may be either an upper plate or a lower plate, to a rim board or other structural member. The selected adaptor position is achieved by securing the adaptor in one of two stable angular positions relative to the drive axis of the fastener driver assembly. In a second mode, the implemented entry angle is oblique to the horizontal member. The adaptor also includes at least one flush indicator to indicate that the proper flush position of a reference surface is achieved. The locator is removably mounted to the pivotal angle guide and mounts a variably positionable position detector with a measurement scale.

A torque reactor has a first body element adjustably joined to a second body element. A first key extends from the first body element to engage a first socket. A second key extends from the second body element to engage a second socket. At least one of the first key and second key is constrained to rotate over a limited rotation angle.