Abstract:
The invention relates to a hand pliers for assembly purposes, more particularly for the assembly of pipe connections at pipe systems, the pliers comprised of two limbs which are rotatably connected to one another via a first link joint (1) and which by means of this link joint (1) are divided into an assembly limb and a handle limb (2,3), wherein the first handle limb (3) is divided into an off-handle lever (14) and into a handle-near lever (15) and wherein these two levers (14, 15) are rotatably connected to one another by means of a bolt (16) via a second link joint, wherein a tension wheel (17) and a ratchet wheel (18) with external toothing (27) connected torsionally proof to it are pivotably arranged on the bolt side by side (16) in axial direction, and wherein the tension wheel (17) engages into a tension means (20) that connects both handle limbs (2,3) to one another, and wherein a spring-loaded dog ratchet (25) is arranged at the handle-near lever (15), the dog ratchet engaging into the ratchet wheel (18) in such a manner that when the handle-near lever (15) makes a latching movement the ratchet wheel (18) and the tension wheel (17) execute a rotation that causes the closing of the pliers, with a spring-loaded arrest ratchet (30) being provided for which also engages in the ratchet wheel (18) and permits a rotation of the ratchet wheel (18) on closing the pliers, but which prevents its rotation in the opposite direction. It is the object of the present invention to provide a hand pliers whose arrest ratchet can be released even if subjected to great assembly forces. To solve this task the invention proposes a switch (33) by the actuation of which the direction of the spring loading of the arrest ratchet (30) is reversible in such a manner that the actuation of the switch (33) takes the effect that the engagement of the arrest ratchet (30) into the ratchet wheel (18) is abolished.
Abstract:
An installation tool assembly for advancing a fitting's swage ring onto a fitting's connector body while a conduit is received in the connector body to mechanically and sealingly connect the fitting to the conduit includes a body defining at least two spaced apart piston chambers, a fixed jaw connected to the body and adapted to engage one of the connector body or the swage ring, and a movable jaw connected to the body and movable relative to the fixed jaw. The movable jaw is adapted to engage the other of the connector body or the swage ring. Pistons are disposed in the at least two spaced piston chambers. The pistons and the movable jaw are configured such that movement of the pistons in a first direction moves the movable jaw toward the fixed jaw thereby moving the swage ring axially onto the connector body to mechanically and sealingly connect the connector body to the conduit received therein when the fixed and movable jaws are engaged to the connector body and swage ring. A crossover assembly follows the contours of the body and fluidly connects the at least two spaced apart piston chambers. The crossover assembly is fluidly connectable to a hydraulic pressure source for delivering hydraulic fluid to the at least two spaced apart piston chambers to move the pistons in the first direction.
Abstract:
A handheld hydraulic assembly tool for advancing a fitting's swage ring onto a fitting's connecting body while a conduit is received in the connector body to mechanically and sealingly connect the fitting to the conduit includes a clamping assembly defining a piston chamber fluidly connected to a pump chamber. The clamping assembly has a fixed jaw adapted to engage one of the connector body and the swage ring and a moveable jaw adapted to engage the other of the connector body and the swage ring. A piston is disposed in the piston chamber. The piston and the moveable jaw are configured such that movement of the piston in a first direction moves the moveable jaw toward the fixed jaw thereby moving the swage ring axially onto the connector body to mechanically and sealingly connect the connector body to the conduit received therein when the jaws are engaged to the connector body and the swage ring. A pump body defines the pump chamber and is connected to the clamping assembly. A fluid reservoir is fluidly connected to the pump chamber. A manually-operated pump piston is disposed in the pump chamber for drawing hydraulic fluid from the fluid reservoir and forcing the drawn hydraulic fluid into the piston chamber to move the piston in the first direction.
Abstract:
An apparatus comprising a sleeve having a first end, a second end, and a center portion; and a lockring slidable on at least the first end. The second end could be the mirror image of the first end or could be any fitting desired to be attached to a tube section. The first end has a constant radius annular chamber such that the end of a tube section slides easily therein initially. The exterior of the first end of the sleeve has a "REVERSE TAPER" configuration such that the exterior radius of the sleeve is least near the center portion and increases generally outward therefrom to a maximum near the end of the sleeve. When the lockring is forced onto the exterior of the sleeve, the sleeve and tube section are deformed the least amount near the center portion, the amount of deformation than generally increasing outward therefrom to a maximum near the end of the sleeve. In the preferred embodiment, this reverse taper is accomplished by a single exterior rib having an inclined surface running therefrom toward the center portion. In another embodiment, the reverse taper is accomplished by a plurality of externally projecting ribs, the first rib near the end of the sleeve being of the greatest radius, and each successive rib toward the center of the apparatus being of successively smaller radius.
Abstract:
Hand pliers for assembly purposes includes an assembly limb and a handle limb rotatably connected to one another via a first link joint. The handle limb is divided into an off-handle lever and a handle-near lever and these two levers are rotatably connected to one another by a bolt via a second link joint, wherein a tension wheel and a ratchet wheel with external toothing connected torsionally proof to it are pivotably arranged on the bolt side by side in axial direction, and the tension wheel engages into a tension device that connects both handle limbs to one another, and a spring-loaded dog ratchet is arranged at the handle-near lever, engaging into the ratchet wheel in such a manner that when the handle-near lever makes a latching movement it permits a rotation of the ratchet wheel on closing the pliers, but prevents its rotation in the opposite direction.
Abstract:
A fitting for coupling with a pipe in a sour environment includes a coupling body, a ring positioned to fit over an end of the coupling body, a main seal formed on an inner surface of the coupling body, a transition section positioned adjacent the main seal, an inboard seal formed on an inner surface of the coupling body, and an outboard seal formed on an inner surface of the coupling body. The transition section is formed as an indentation on the inner surface of the coupling body and has a first portion with a first diameter and a second portion with a second diameter, with the first diameter being greater than the second diameter. When the ring is fitted over the at least one end of the coupling body via force, the ring and coupling body apply a coupling force to the main seal, the outboard seal and the inboard seal to connect the pipe to the coupling body in a non-leaking manner. The fitting is made of a low alloy carbon steel material. The main seal includes a first seal, a second seal, and a third seal.
Abstract:
A fitting for making connections with a pipe includes a coupling body having an inside surface defining a bore for receiving a pipe. A ring is fitted over the coupling body for sealing and mechanically connecting the coupling body to the pipe. An axisymmetrical main seal is formed on the inside surface of the coupling body that seals and connects to the pipe when the ring is installed on the coupling body. An axisymmetrical inboard seal is formed on the inside surface of the coupling body axially spaced from the main seal that seals and connects to the pipe when the ring is installed on the coupling body. At least one of the coupling body and the ring is configured so that the inboard seal seals and connects after the main seal seals and connects to the pipe. An axisymmetrical outboard seal is formed on the inside surface of the coupling body axially spaced from the main seal that connects to the pipe when the ring is installed on the coupling body. At least one of the coupling body and the ring is further configured so that the outboard seal seals and mechanically connects after the inboard seal seals and connects to the pipe. At least one of the coupling body and the ring is still further configured to apply a restoring load to the main seal to further seal and mechanically connect the main seal to the pipe after the outboard seal seals and connects to the pipe.
Abstract:
A pliers for mounting purposes has two plier portions pivotably connected by a first pivot connection. Each plier portion has a jaw base body and a grip of a length that is a multiple of the length of the jaw base body. A first grip is divided into a first and second section. The first section, shorter than the second section, is located between the jaw base body and the second section. A second pivot connection pivotably connects the first and second sections and has a pivot bolt extending parallel to the pivot axis of the first pivot connection. A sprocket wheel and a ratchet wheel are rotatably connected to the pivot bolt and fixedly connected to one another. A chain connected to the second grip is guided across the sprocket wheel to the second section and extends in the longitudinal direction toward a tension spring at which it is fastened. A spring-biased follower pawl is connected to the second section such that upon closing the second section sprocket wheel and ratchet wheel rotate to close the pliers. The ratchet wheel has an outer toothing engaged by a spring-biased locking pawl that allows rotation of the ratchet wheel in a first direction during closing of the pliers but prevents rotation in the counter direction. A pin, connected to the locking pawl and accessible from the exterior of the pliers, is provided for disengaging the locking pawl temporarily from the outer toothing.
Abstract:
A pipe coupling (100) including a coupling body (104) and a swage ring (102) for urging over the coupling body (104) in order to secure the pipes (122) together. The coupling body (104) includes a main sealing tooth (105) with an outboard isolation tooth arrangement (106). The isolation tooth arrangement (106) includes a plurality of isolation gripping teeth (108) which allows for a reducing gradient of pipe deformation in a direction toward the edge 118 of the coupling body (104) of the pipe fitting (100).
Abstract:
A fitting assembly for maintaining a leak free seal connection with an associated fluid conduit during and after exposure to extreme heat is provided. The fitting assembly includes a coupling body including an inside surface defining a bore for receiving the associated fluid conduit. The coupling body is made of a first corrosion resistant material having a first coefficient of thermal expansion. The at least one ring is made of a complementary second corrosion resistant material having a second larger coefficient of thermal expansion such that the second material will expand at a greater rate that the first material during heating to a first temperature generally exceeding annealing temperatures of both the first material and the second material. The second material contracts at a greater rate that the first material during subsequent cooling to a second temperature below the annealing temperatures thereby restoring compressive and tensile stresses in the associated fluid conduit and the fitting assembly for ensuring that the fitting assembly maintains a leak free seal connection with the associated fluid conduit.