A pair of pliers having two pliers legs that are arranged in a crossing manner, wherein a fixed joint is formed, having a joint pin. The joint pin has a first conical portion that widens towards the outer side, wherein, the pliers leg is assigned a second conical portion which bears on the first conical portion and transitions into a first mouth portion that leads into the outer side of the pliers leg. The joint pin has a second mouth portion which, starting from the outer side of the pliers leg and perpendicularly to a joint axis, overlaps the first mouth portion. The first and second mouth portion, bound a circular clearance between one another, the radial dimension of the clearance corresponding to 0.05 to 0.15 times the radial dimension, measured from the joint axis of the joint pin in the region of the second mouth portion.

A spring clamp for assembly fixturing includes a retainer that limits a minimum distance between jaws of the spring clamp when the spring clamp is in a relaxed state.

A spring clamp for assembly fixturing includes a retainer that limits a minimum distance between jaws of the spring clamp when the spring clamp is in a relaxed state.

A riveting device for mutual assembly of two parts each including a bore, where the device includes a non-deformable external rivet having a tubular body suitable for being inserted into said bores and provided on one of the longitudinal ends thereof with a lip, and an internal rivet having a solid deformable cylindrical body and issuing substantially perpendicular from a flange, said tubular body having an external diameter slightly less than the diameter of said bores and a length D between the rear face of the lip thereof and the opposite end thereof at most equal to the sum of the thicknesses of the parts, said cylindrical body having an external homothetic transverse cross-section slightly less than the internal transverse cross-section of the tubular body, and a length slightly greater than that of the tubular body.

A riveting device for mutual assembly of two parts each including a bore, where the device includes a non-deformable external rivet having a tubular body suitable for being inserted into said bores and provided on one of the longitudinal ends thereof with a lip, and an internal rivet having a solid deformable cylindrical body and issuing substantially perpendicular from a flange, said tubular body having an external diameter slightly less than the diameter of said bores and a length D between the rear face of the lip thereof and the opposite end thereof at most equal to the sum of the thicknesses of the parts, said cylindrical body having an external homothetic transverse cross-section slightly less than the internal transverse cross-section of the tubular body, and a length slightly greater than that of the tubular body.

A hand tool includes a handle assembly, a jaw assembly, and an adjustment assembly. The handle assembly may include a top handle and a bottom handle. The jaw assembly may include a top jaw and a bottom jaw. The top and bottom jaws may be operably coupled to the top and bottom handles to compress the top and bottom jaws toward each other responsive to compression of the top and bottom handles toward each other. The adjustment assembly may be configured to enable a grip size defined by the jaw assembly to be modified and includes a first adjuster disposed at a distal end of the top handle, a second adjuster disposed at a point between a middle portion and proximal end of the top handle, and an adjustment rod operably coupled to each of the first and second adjusters.

A compound pliers has a main joint pivotally connecting a right jaw to a left jaw; a right jaw lever extending from the left jaw and a left jaw lever extending from the right jaw; an auxiliary joint pivotally connecting a right handle joint lever to a left handle joint lever; a right handle joint connecting a right jaw lever to a right handle joint lever; a left handle joint connecting a left jaw lever to a left handle joint lever; and a right handle indent formed on the right jaw lever. The right handle indent receives an auxiliary joint protrusion. The auxiliary joint protrusion is formed around the auxiliary joint.

A compound pliers has a main joint pivotally connecting a right jaw to a left jaw; a right jaw lever extending from the left jaw and a left jaw lever extending from the right jaw; an auxiliary joint pivotally connecting a right handle joint lever to a left handle joint lever; a right handle joint connecting a right jaw lever to a right handle joint lever; a left handle joint connecting a left jaw lever to a left handle joint lever; and a right handle indent formed on the right jaw lever. The right handle indent receives an auxiliary joint protrusion. The auxiliary joint protrusion is formed around the auxiliary joint.

A pliers includes a first body including an engaging groove, a second body, and a tap-button mechanism. The second body is pivoted with the first body, and the first body is pivotable relative to the second body. The tap-button mechanism includes two positioning grooves at the second body and a tap button pivoted on the second body. When the first body comes close to the second body, the tap button can be tapped to a first position and engaged in the engaging groove. Thus, the first body is blocked and cannot pivot relative to the second body. The tap button can be tapped to a second position and detached from the engaging groove. Thus, the first body is pivotable relative to the second body. A positioning block is extending from the tap button and can be engaged in any of the positioning grooves for positioning the tap button.

A pliers includes a first body including an engaging groove, a second body, and a tap-button mechanism. The second body is pivoted with the first body, and the first body is pivotable relative to the second body. The tap-button mechanism includes two positioning grooves at the second body and a tap button pivoted on the second body. When the first body comes close to the second body, the tap button can be tapped to a first position and engaged in the engaging groove. Thus, the first body is blocked and cannot pivot relative to the second body. The tap button can be tapped to a second position and detached from the engaging groove. Thus, the first body is pivotable relative to the second body. A positioning block is extending from the tap button and can be engaged in any of the positioning grooves for positioning the tap button.