초록 ▼

A method of forming a composite nut having a threaded connection in which the axial load between a screw and nut in a tightened condition of the connection is distributed more uniformly between different turns of the engaged threads than in a standard threaded connection by forming the nut to have a

A method of forming a composite nut having a threaded connection in which the axial load between a screw and nut in a tightened condition of the connection is distributed more uniformly between different turns of the engaged threads than in a standard threaded connection by forming the nut to have a pitch which increases progressively as the thread advances helically in a predetermined axial direction, while the other thread desirably has a pitch which is uniform along its length. The pitch of the first thread may increase at a rate predetermined to compensate for differences in the tensile force which is applied to the screw and the compressive force applied to the nut at different points along their length when the screw and nut are tightened together to a prestressed condition.

대표청구항 ▼

The method of forming a composite nut that comprises: progressively deforming an elongated element having a predetermined initial cross section to the form of a coil defining an internal thread and having a progressively changing cross section giving the thread a progressively changing pitch; and se

The method of forming a composite nut that comprises: progressively deforming an elongated element having a predetermined initial cross section to the form of a coil defining an internal thread and having a progressively changing cross section giving the thread a progressively changing pitch; and securing said coil rigidly within a passage in a nut body with the thread at said changing pitch; said deforming of the element including shaping said element to have axial and radial dimensions one of which progressively increases in a predetermined direction, and the other of which progressively decreases in said direction at a rate compensating for the increase in said one dimension and giving the element a substantially uniform cross sectional area along its length.