PROCEDURE AND DEVICE FOR ARREST OF THREADED CONNECTIONS Russian patent published in 2011 - IPC F16B39/26 F16B43/02 F16B5/02 

FIELD: machine building.

SUBSTANCE: procedure for arrest of threaded connections by means of fixing device including nut, bolt or pin, and plate consists in fabrication of plate with orifice in centre. The plate is made out of an alloyed sheet with shape memory effect. Further, a lug with a single free end and free sides is made on a periphery region of the plate. Successively the plate is heated to temperature of the end of austenite transformation and is shaped flat, where upon it is cooled to temperature of the end of austenite transformations and the lug on it is bent at angle to the plane of the plate. The plate is secured to one of connected elements and is connected to another connected element by means of the bolt and nut or pin with the nut; also, either a head of the bolt, or the nut have corresponding recesses for the lug. For release the lug of the plate is heated to temperature of the end of austenite transformations, where upon the lug is straightened. The fixing device for implementation of the said procedure consists of the nut, bolt or pin and the plate. The plate made out of alloy with the shape memory effect has the central orifice and the lug with the single free end and free sides; the lug is bent to plane of the plate at angle. Depth of recess changes in the direction of screwing from zero to maximum, also maximal depth of the recess along axis of rotation corresponds to height of the lug.

EFFECT: raised reliability of arresting device with possibility of arrest release.

5 cl, 3 dwg