Abstract: A device mountable onto the head of a torque wrench for testing the braze strength of replaceable kerf or saw tips (referred to inter-changeably herein), the device includes a clamp supporting member for clamped mounting, at a first end thereof, to a braze-on saw tip brazed to a saw blade tooth, and for mounting, at an opposite second end of the member, to the head of the torque wrench. A clamp, for rigidly clamping the braze-on saw tip between opposed facing jaws of the clamp, is mounted to the clamp supporting member so as to orient the jaws on opposite sides of an axis of rotation of the head of the torque wrench when the head is mounted to the second end of the member.

Abstract: A beam-type torquing and measuring tool having two telescoping members rotationally attached together at a first end of each, and they are relatively rotatable at the other end. One member transmits torque to the workpiece and has a pointer thereon, and the other member has a scale readable relative to the pointer to measure the torque being applied. The members have a central opening extending axially therethrough for canalization, and there may be adapters threadedly attached to the tool ends, and the scale and pointer can be read in their two diametrically opposite locations.

Abstract: A metered torque wrench for applying a measured torque to a shaft including an elongated housing enclosing a spring being a stack of resilient metal strips. One end of the stack is secured to one end of the housing. The other end of the stack is secured to a coupler journalled into another end of the housing. A dial plate has a scale and is mounted on the coupler adjacent the another end of the housing. When torque is applied by turning the housing with coupler mounted on the shaft, the magnitude of torque is indicated by displacement of a marker on the edge of the housing relatie to the origin of the dial scale. A floating ring retains the torque reading after the torque has been removed.

Abstract: A tactile torque wrench adapted for use with manual pipe tongs for gripping tubular members and the like, the torque handle adapted thereto for applying an actuating force in a manner so as to effect pivotal movement of the handle and create a tactile and audible indication to an operator when a predetermined but selectively variable torque is applied to the handle to generate the actuating force on a pipe tong and the like.

Abstract: A hand-held powered screw tightening tool has a detecting device to detect a rotation angle of a rotary member in a clockwise direction and a counterclockwise direction. In screw tightening, an angle obtained by subtracting a cumulative total of the rotation angle of the rotary member with rebound, if any, in a counterclockwise direction from a cumulative total of the rotation angle of the rotary member in the clockwise direction is detected and accumulated as a total rotation angle (P) and a rotation angle formed during the deceleration at the hammering is detected as &Dgr;H and accumulated, and a preset design angle Pd for hammering is accumulated. A wobbling angle is calculated from Equation: A wobbling angle=P−a cumulative total of Pd−a cumulative total of &Dgr;H (where Pd is a design value of the impact wrench, indicating an angle corresponding to 360°/m for the case of the m number of hammerings per rotation of the rotary member).

Abstract: A method for self-programming a computerized power nutrunner control system for tightening a number of similar screw joints to a desired final torque level (MF) is provided. The method includes the steps of: (i) tightening initially at a low speed one of the screw joints up to the final torque level (MF), while detecting and analyzing one or more screw joint characteristics, (ii) adjusting successively during a number of succeeding tightening processes one or more nutrunner operating parameters with respect to the detected and analyzed screw joint characteristics, and (iii) locking the self-programming after the nutrunner operating parameters have been adjusted to accomplish a safe tightening of respective following ones of the screw joints to the final torque level (MF) at a satisfactory short time interval.

Abstract: A screwer test bench (10) comprises a coupling (12) designed for coupling with the head (13) of a screwer. The coupling is connected to a braking unit (14) through a sensor unit (15) for detection of mechanical magnitudes transmitted between the coupling and the braking unit. The braking unit (14) comprises a cap (17) connected to the coupling and a movable member (18) thrust on command in brake operation direction. The movable member (18) is constrained against rotation around the brake axis by an inextensible wall (19) with a configuration deformable in said braking direction. Advantageously the wall is in the form of a bellows into which is fed pressurized fluid to bring about its elongation and operate the brake.

Abstract: Method of fixedly connecting together externally and internally threaded tubes by tight engagement of externally and internally threaded portions of the tubes, wherein a wrenching operation is performed to rotate the externally and internally threaded tubes relative to each other with the externally and internally threaded portions engaging each other while an axial force is applied between the tubes. A physical quantity relating to a coefficient of friction between said tubes is obtained on the basis of a detected wrenching torque applied to rotate the tubes relative to each other and the axial force, and a terminating condition for terminating the wrenching operation is determined on the basis of the obtained physical quantity. The wrenching operation is terminated when the terminating condition has been satisfied. Apparatus for practicing the method and recording medium storing a control program for the method are also disclosed.

Abstract: A torque apparatus for the installation and removal of threaded connecting device that employs a plurality of leaf spring elements engaging a plurality of asymmetrical drive teeth sides to establish preset torque values in a hermetically sealed configuration or a variable range of preset torque values in a second configuration. The preset torque values can be readily changed in the second configuration by employing different quantities of leaf springs, differing leaf spring designs, or varying the geometry of the rotor drive teeth. The leaf spring to rotor drive teeth interface provides a slip mechanism to prevent over-torquing when torque values for the installation of a threaded connecting type device is exceeded. While both torque wrench configurations are sterilizable, the torque wrench that is capable of full disassembly for sterilization and use thereafter in a sterilized environment, is reconfigurable for different torque applications without calibration.

Abstract: An apparatus and method for determining the coefficient of friction for plastic articles having non-planar surfaces and particularly plastic articles having irregular and arcuate surfaces, such as thermoplastic bottles or preforms utilizes a stationary sample and a rotatable sample in contact with the stationary sample. A downward force is applied to the stationary sample while applying torque to the rotatable sample. The torque applied is computer controlled and at the moment of slip is detected. The amount of torque necessary for maintaining a constant speed is also computer controlled and recorded. From the torque measurements, the computer calculates the coefficient of friction between the two sample materials.

Abstract: To provide a torque wrench for additional tightening inspection which corrects an error resulting from the rotation of the torque wrench before the rotation of an inspection bolt so that a precise torque value can be measured by simply tightening the tightening bolt additionally.

Abstract: A torque indicating wrench has a resilient beam with a handle end and a work-engaging end carrying a ratchet mechanism. The resilient beam is generally channel-shaped in transverse cross section and is tapered in thickness from the work-engaging end to the handle end. A reference beam is disposed in the channel and has first and second ends respectively pivotally coupled to the work-engaging and handle ends of the resilient beam. The reference beam has openings adjacent to its first and second ends to facilitate pivotal coupling to the resilient beam while substantially eliminating non-pivotal relative movement in use. A handle housing encloses the beams along substantially their entire lengths and is fixed to the resilient beam only adjacent to its handle end.

Abstract: A tactile torque wrench adapted for use with manual pipe tongs for gripping tubular members and the like, the torque handle adapted thereto for applying an actuating force in a manner so as to effect pivotal movement of the handle and create a tactile and audible indication to an operator when a predetermined but selectively variable torque is applied to the handle to generate the actuating force on a pipe tong and the like.

Abstract: A hand-held powered screw tightening tool is provided with a detecting means to detect a rotation angle of a rotary member in a clockwise direction and a counterclockwise direction. In screw tightening, an angle obtained by subtracting a cumulative total of the rotation angle of the rotary member with rebound, if any, in a counterclockwise direction from a cumulative total of the rotation angle of the same in the clockwise direction is detected and accumulated as a total rotation angle (P) and a rotation angle formed in the middle of the deceleration at the hammering is detected as &Dgr;H and accumulated, and a preset design angle Pd for hammering is accumulated. A wobbling angle is calculated from Equation: A wobbling angle=P−a cumulative total of Pd−a cumulative total of &Dgr;H (where Pd is a design value of the powered wrench, indicating an angle corresponding to 360°/m for the case of the m number of hammerings per rotation of the rotary member).

Abstract: Method of fixedly connecting together externally and internally threaded tubes by tight engagement of externally and internally threaded portions of the tubes, wherein a wrenching operation is performed to rotate the externally and internally threaded tubes relative to each other with the externally and internally threaded portions engaging each other while an axial force is applied between the tubes. A physical quantity relating to a coefficient of friction between said tubes is obtained on the basis of a detected wrenching torque applied to rotate the tubes relative to each other and the axial force, and a terminating condition for terminating the wrenching operation is determined on the basis of the obtained physical quantity. The wrenching operation is terminated when the terminating condition has been satisfied. Apparatus for practicing the method and recording medium storing a control program for the method are also disclosed.

Abstract: A torque process control method and apparatus, including associated components, for fluid-powered tools such as impact and pulse-driven wrenches and nut runners.

Abstract: A manual or powered screwing tool comprising a body to which is coupled one of different removable inserts and a sensor for detection of the torque exerted on the mechanical member which sends a data signal directed to calculation means to obtain significant tool action parameters. On each insert is mounted a sender of signals designed to identify the insert in a manner differentiating it from other inserts and with the body is associated a circuit comprising an antenna member designed to receive signals sent by the sender mounted on the insert coupled to the tool with the antenna signal being directed to the calculation means to influence calculation of said parameters.

Abstract: A system by which the torque applied to a fastener such as a bolt or nut may be measured simply and accurately. More particularly, the invention relates to apparatus and methods by which the torque applied to a fastener by a socket wrench can be measured through a simplified extension element accurately and displayed quickly so that the placement of possibly damaging excessive amounts of pressure on the fastener can be avoided.