Abstract: A coupler including a first fitting for mounting to a first externally threaded reinforcing bar for use in concrete construction, the first fitting comprising a first body having a first internal thread for threadedly inserting the first externally threaded reinforcing bar into the first fitting; the first fitting having a second internal thread having a pitch finer than a pitch of the first internal thread; and a plug for threading into the second internal thread for abutting an end of said threaded reinforcing bar.

Abstract: An anchor for embedment in a concrete body for lifting the concrete body, wherein the anchor includes a head having a lifting aperture for engagement with a lifting device, and a pair of legs adapted for embedment within the concrete body, wherein the head has an additional aperture having at least a portion of the additional aperture bordered by a border rib, wherein a lower edge of the head is provided with a cross rib which extends between the pair of legs, and wherein webbing extends between the border rib and the cross rib such that a cross-section along a longitudinal axis of the anchor between the cross rib and the border rib forms an I-beam.

Abstract: A clutch for lifting a concrete component, including a toroidal connector, a latch movable relative to the toroidal connector between a disengaged condition and an engaged condition, and a coupler for coupling the toroidal connector to a lifting apparatus, wherein the coupler includes a first part and a second part pivotal relative to the first part about a pin, and wherein the coupler includes a tamper evident indicator to indicate that the clutch has not been disassembled.

Abstract: A clutch for lifting a concrete component, including a toroidal connector, a latch in the form of a locking ring movable relative to the toroidal connector between a disengaged condition and an engaged condition, the locking ring having a handle extending radially outwardly from the toroidal connector, and a coupler for coupling the toroidal connector to a lifting apparatus, wherein the coupler includes a first part and a second part pivotal relative to the first part, the coupler being arranged to limit pivotal movement of the second part relative to the first part.

Abstract: A clutch for lifting a concrete component and including a toroidal connector, a latch movable relative to the toroidal connector from a disengaged condition to an engaged condition, and a coupler for coupling the toroidal connector to a lifting apparatus, wherein the coupler is articulated.

Abstract: An anchor for embedment in a concrete body for lifting the concrete body, wherein the anchor includes a head having a lifting aperture for engagement with a lifting device, and a pair of legs adapted for embedment within the concrete body, wherein the head has an additional aperture having at least a portion of the additional aperture bordered by a border rib, wherein a lower edge of the head is provided with a cross rib which extends between the pair of legs, and wherein webbing extends between the border rib and the cross rib such that a cross-section along a longitudinal axis of the anchor between the cross rib and the border rib forms an I-beam.

Abstract: A clutch for lifting a concrete component, including a toroidal connector, a latch movable relative to the toroidal connector between a disengaged condition and an engaged condition, and a coupler for coupling the toroidal connector to a lifting apparatus, wherein the toroidal connector has a circular seat for sitting upon a circular upper surface of a head of and anchor coupled to the toroidal connector, wherein the circular seat terminates in a radial bearing surface for abutment with a castellation of the anchor.

Abstract: A tool for driving a fastener pin into a substrate to secure a fastener body to the substrate for fixing insulation or other cladding, the tool being of the type comprising a fastener guide and a driving piston driven along the fastener guide by gas pressure to engage and drive the pin, the fastener guide being displaceable axially inwardly relative to the body of the tool in order to cock the tool for firing of the driving piston, wherein the tool comprises means for enabling the tool to push the fastener body through insulation or other cladding into engagement with the underlying substrate without putting the tool into a condition in which firing can occur, the tool being thereafter able to be put into a condition to permit firing to take place.

Abstract: An explosively actuated fastener driving tool of the type having a driving piston for driving a fastener at the forward end of a barrel upon firing of the tool has a retractor pawl assembly with a pawl for resetting the piston into a rear end of the barrel by forward movement of the barrel relative to the receiver following firing. The pawl assembly is so constructed that the pawl can be withdrawn from the barrel to permit removal of the barrel for routine cleaning and maintenance but in this condition the assembly still remains attached to the tool to prevent components from being misplaced.

Abstract: A tool for driving a fastener pin into a substrate to secure a fastener body to the substrate for fixing insulation or other cladding, the tool being of the type comprising a fastener guide and a driving piston driven along the fastener guide by gas pressure to engage and drive the pin, the fastener guide being displaceable axially inwardly relative to the body of the tool in order to cock the tool for firing of the driving piston, wherein the tool comprises means for enabling the tool to push the fastener body through insulation or other cladding into engagement with the underlying substrate without putting the tool into a condition in which firing can occur, the tool being thereafter able to be put into a condition to permit firing to take place.

Abstract: An explosively actuated fastener driving tool of the type having a driving piston for driving a fastener at the forward end of a barrel upon firing of the tool has a retractor pawl assembly with a pawl for resetting the piston into a rear end of the barrel by forward movement of the barrel relative to the receiver following firing. The pawl assembly is so constructed that the pawl can be withdrawn from the barrel to permit removal of the barrel for routine cleaning and maintenance but in this condition the assembly still remains attached to the tool to prevent components from being misplaced.

Abstract: An explosively actuated tool for driving a fastener into a substrate is of indirect acting type having a driving piston mounted within the barrel of the tool for driving the fastener. The tool is a single shot tool which receives an explosive charge, particularly a .22 cal×0.613 ins long unnecked charge capable of generating a piston kinetic energy of at least 260 joule. The piston has a recess in its rear face able to smooth-out sharp pressure spikes and reduce peak pressure generated during combustion of the high powered explosive charge.

Abstract: A power actuated tool for driving a fastener such as a pin into a substrate such as steel or concrete comprises a driving piston (6) which is driven forwardly within the barrel (4) of the tool upon firing and is automatically reset in response to cocking of the tool prior to the subsequent firing. Resetting of the piston takes place by thrusting the piston (6) rearwardly during cocking by means of a spring-loaded gripper device (14) energized during cocking.

Abstract: A shoe for use with a fitting such as a lifting anchor or ferrule adapted to be cast into a reinforced concrete component, the shoe serving, in use, to locate tie-in bars relative to the fitting. The shoe comprises a body portion slidably received on a shank of the fitting, and clips for engaging with a snap-in action tie-in bars extending at opposite sides of the shank. The shoe can be retro-fitted to a pre-existing anchor assembly comprising an anchor, support, and void former.