58 results about "Headed large" patented technology

A method of installing a threaded fastener from one side of a hole through a substrate. The fastener includes a collar and a bolt having a head, a threaded tail portion and a tool engagement portion extending from the tail. The method includes: (a) engaging the tool engagement portion with a bolt engagement portion of a tool (b) passing the bolt through to the far side of the hole and supporting it there by way of the tool, (c) passing the collar through the hole while supporting it with the tool; (d) assembling the bolt and collar to form the threaded fastener having a head larger than the hole; (e) engaging a nut to tighten the fastener; and (f) detaching the tool from the fastener. Separation of the bolt engagement portion and the tool engagement portion is prevented by a moveable member, which engages both portions.

The invention discloses an intelligent tension tool anchor capable of making penetration of prestressed reinforcing steel easy. The tool anchor comprises a tool anchor ring and tool jackets, circular-truncated-cone-shaped tool anchor eyes run through the tool anchor ring, the shapes of the tool jackets are matched with those of the inner walls of the tool anchor eyes, the tool jackets are sleevedwith the tool anchor eyes, and prestressed reinforcing steel engagement holes which are coaxial with the tool anchor eyes are formed in the tool jackets; the tool jackets are formed by circumferentially assembling at least two tool clamping pieces, clamping piece lifting assemblies are connected with the big ends of the tool jackets, clamping piece restoration components are connected with the small ends of the tool jackets, and lifting operation pieces are arranged between the clamping piece lifting assemblies and the tool anchor ring. The intelligent tension tool anchor has the advantages that the tool clamping pieces are easily pulled to the big ends of the tool anchor eyes, so that the prestressed reinforcing steel engagement holes are expanded, and penetration of prestressed reinforcing steel is easy; after use, the clamping piece restoration components can help the tool clamping pieces automatically get back into work anchor eyes, and the intelligent tension tool anchor is particularly suitable for penetration and clamping of multiple pieces of prestressed reinforcing steel on the multi-hole tool anchor.

A device for attaching items to clothing or gear including a length of material with a first end, a second end narrower than the first end, an opening near the first end of the length of material, a hole within the length of material located at the second end of the material, and a protrusion perpendicular to the plane of the length of material located between the opening near the first end of the length of material and the first end. The protrusion comprises a shaft having a head larger than the shaft, but equal to or smaller than the hole at the second end of the length of material. By folding the length of material at a tapered folding point, the second end fits through the opening near the first end allowing the protrusion to engage the hole of the second end, thus securely fastening the two ends together.

A seesaw type hydraulic control plug reversing reset device of power tongs comprises a seesaw type plug mechanism, a hydraulic drive ramp, a shell, a tongs head large gear and a tongs head clamping mechanism. The seesaw type plug mechanism is arranged on the tongs head clamping mechanism. The hydraulic drive ramp is fixed to the shell. The tongs head large gear rotationally drives the tongs head clamping mechanism to rotate along with a seesaw type plug. The seesaw type plug ascends and descends on the slope face of the hydraulic drive ramp, so that the position of the plug is changed, and the purposes that the screwing direction and unscrewing direction of the tongs head clamping mechanism are changed and the tongs head clamping mechanism is reset relative to the tongs head large gear are achieved. The plug climbs on the hydraulic drive ramp so that screwing direction and unscrewing direction can be converted and the remote hydraulic control purpose can be achieved. Mis-operation or the condition that the hydraulic drive ramp is not retracted in time can not affect the operation process, the operation process is conducted the same way when the hydraulic control plug reversing reset device is not installed, and the seesaw type hydraulic control plug reversing reset device has the advantages of being ingenious in structure, simple, reliable, convenient to operate and the like.