Patent ID: 7874313
Filing Date: 2011-01-25
Classification: F16L,Y10T

Abstract:
1. A pipe coupling comprising a female coupling member and a male coupling member that are connected to each other, wherein at least one of the female coupling member and the male coupling member comprises: a tubular body configured to receive the other of the female coupling member and the male coupling member from one end thereof; a slide valve holder set in the tubular body slidably in an axial direction of the tubular body, the slide valve holder being slidable between a closed position and an open position where the slide valve holder is pushed rearward of the closed position by the other of the female coupling member and the male coupling member inserted into the tubular body, the slide valve holder having a through-hole constituting a flow path extending in an axial direction of the slide valve holder and an annular valve seat provided around the through-hole; a rotary valve having an outer peripheral surface portion that sealingly engages the valve seat and a fluid passage extending through the rotary valve and opening on the outer peripheral surface portion, the rotary valve being rotatable about a pivot axis extending in a direction perpendicular to the axial direction of the slide valve holder while the outer peripheral surface portion thereof slides on the valve seat, so that when the slide valve holder is in the open position, the fluid passage aligns with the through-hole of the slide valve holder to open the flow path, whereas when the slide valve holder is in the closed position, the fluid passage is out of alignment with the through-hole of the slide valve holder to close the flow path; and a spring member that presses the rotary valve against the valve seat; wherein the rotary valve is displaceable in the axial direction of the slide valve holder, so that the rotary valve can be pressed against the valve seat by a fluid pressure in the tubular body in addition to a pressing force from the spring member.