Patent ID: 9121534
Filing Date: 2015-09-01
Classification: F16L

Abstract:
1. One coupling member of a male coupling member and a female coupling member of a pipe coupling, the female coupling member including a passage extending through the female coupling member from a front end to a rear end of the female coupling member and the male coupling member including a passage extending through the male coupling member from a front end to a rear end of the male coupling member, the male coupling member being configured to be inserted into the passage of the female coupling member from the front end of the female coupling member such that the male coupling member is decouplably coupled to the female coupling member so as to form a fluid passage through the pipe coupling, and the one coupling member comprising: a coupling member fitting portion having a circularly extending circular surface having a width in a longitudinal axis direction of the one coupling member, the circularly extending circular surface being capable of contacting a corresponding circularly extending circular surface of a fitted portion of the other coupling member of the male coupling member and the female coupling member, the corresponding circularly extending circular surface having a width in a longitudinal axis direction of the other coupling member; at least one annular recess for anti-freezing formed on the circularly extending circular surface of the coupling member fitting portion, the at least one circularly extending annular recess having a width that is smaller than the width of the circularly extending circular surface of the coupling member fitting portion in the longitudinal axis direction of the one coupling member such that, the at least one annular recess has an annular opening portion opening on the circularly extending circular surface of the coupling member fitting portion and positioned axially inside front and rear edges of the circularly extending circular surface of the coupling member fitting portion in the longitudinal axis direction of the one coupling member, and a bottom portion radially corresponding to the annular opening portion; and, a plurality of pliable members secured to the bottom portion of the at least one annular recess and extending from the bottom portion to the annular opening portion so as to be capable of contacting the corresponding circularly extending circular surface of the other coupling member.