FEMALE ELEMENT WITH ANTI-SCREWING SYSTEM FOR QUICK-COUPLING FOR PIPE FITTING

摘要

It is described a female element (1) comprising a hollow external body (2) having an end (3) provided with fastening means (5) of one of the pipes to be joined and another end (4) intended for the frontal coupling with a corresponding end (36) of a male element (31). On said other end (4) of the external body (2) is rotationally and slidingly mounted a lock ring nut (6) which is screwable onto a complementary part (33) of the external body (32) of the male element to ensure the stabile union of the two male and female fitting elements. A ball bearing (16) is interposed between said lock ring nut (6) and said external body (2) of the female element (1) to generate between the same a rolling friction capable of allowing the reciprocal rotation without loosening the lock ring nut (6) from the external body (32) of the male element (31) in the case of turning or reciprocal twisting of the two pipes connected to the two male and female elements. Alternatively to the ball bearing, a pair of low-friction coefficient pads (50 and 51) may be provided.