초록 ▼

A torque-limiting bolt-and-nut assembly is provided for actuating a pipe-pressing member in order to secure two pipe ends together. The bolt includes a threaded shank, a secondary drive head, and a shearable drive head designed to be sheared-off by a torque exceeding a predetermined value. A recess

A torque-limiting bolt-and-nut assembly is provided for actuating a pipe-pressing member in order to secure two pipe ends together. The bolt includes a threaded shank, a secondary drive head, and a shearable drive head designed to be sheared-off by a torque exceeding a predetermined value. A recess is formed between the shearable drive head and the second drive head. The nut is mounted on the shearable drive head and is configured for transmitting torque to the shearable drive head from a manual tool. A nut includes a connection structure extending into the recess for resisting dislodgement of the nut from the bolt. The shearable drive head has at least four sides, all of the sides being of equal length, and the number of the sides being an even number.

대표청구항 ▼

A torque-limiting bolt-and-nut assembly is provided for actuating a pipe-pressing member in order to secure two pipe ends together. The bolt includes a threaded shank, a secondary drive head, and a shearable drive head designed to be sheared-off by a torque exceeding a predetermined value. A recess

A torque-limiting bolt-and-nut assembly is provided for actuating a pipe-pressing member in order to secure two pipe ends together. The bolt includes a threaded shank, a secondary drive head, and a shearable drive head designed to be sheared-off by a torque exceeding a predetermined value. A recess is formed between the shearable drive head and the second drive head. The nut is mounted on the shearable drive head and is configured for transmitting torque to the shearable drive head from a manual tool. A nut includes a connection structure extending into the recess for resisting dislodgement of the nut from the bolt. The shearable drive head has at least four sides, all of the sides being of equal length, and the number of the sides being an even number. ed value, and a recess formed between the shearable drive head and the secondary drive head, the recess extending around an outer periphery of the shear-off section;the shearable drive head having at least four sides, all of the sides being of equal length as viewed in a cross-sectional plane oriented perpendicularly to a center axis of the bolt, the number of the a,sides being an even number;pipe-pressing members threadedly attached to the shank of respective ones of the bolts; andthe nut being mounted on the shearable drive head and configured for transmitting torque to the shearable drive head from a tool, the nut including a connection structure extending into the recess for resisting dislodgement of the nut from the bolt.11. The holder according to claim 10 wherein the connection structure comprises a portion of the nut pressed into the recess.12. The holder according to claim 11 wherein the nut extends over the outside of both the shearable drive head and the secondary drive head, and the connection structure comprises a portion of the nut situated between opposite ends of the nut.13. The holder according to claim 11 wherein the nut extends over the outside of the shearable drive head and includes an end disposed in the vicinity of the recess and pressed into the recess to define the connection structure.14. The holder according to claim 10 wherein the connection structure comprises a pin extending from a hole of the nut and received in the recess.