Patent ID: 9016729
Filing Date: 2015-04-28
Classification: F16L

Abstract:
1. A quick connector capable of being installed with a checker which is adapted for verifying complete insertion of a mating pipe in the quick connector, the quick connector, comprising: a tubular connector body having a connecting portion adapted to be connected to a piping tube on one axial end of the connector body and a connector housing including a retainer holding portion on the other axial end of the connector body, the connector housing being formed therethrough from one side face to an opposite side face of the retainer holding portion in a direction transverse to an axis of the connector body with retainer opening portions, resilient leg insertion opening portions between the retainer opening portions, and a restraining hole between the resilient leg insertion opening portions, a retainer having inwardly directed curved claw portions connected by spring bridging portions to outwardly projecting release operating portions which are configured to be held in a mating fit within the retainer opening portions, and adapted to hold a mating pipe at an insert position in locking relation by snap-engaging the claw portions of the retainer with an annular projecting portion on an outer peripheral surface of the mating pipe which is adapted to be inserted in the connector housing, the resilient leg insertion opening portions being formed separate from the retainer opening portions through a tubular wall of the connector housing and leading into elongated guide recessed portions adapted to receive resilient legs of the checker in the connector housing from leading ends of the resilient legs in a direction perpendicular to the axis of the connector housing, latch portions provided on upper edges of window portions formed behind the retainer opening portions inside the connector housing and adapted for allowing latching pawls of the resilient legs to be latched onto the latch portions, and a resilient deformation clearance gap defined by the window portions and the latch portions inside the connector housing and adapted for allowing the resilient legs to be resiliently deformed in an axial direction from a position of the resilient legs with the latching pawls being latched onto the latch portions to a position of the resilient legs with the latching pawls being unlatched from the latch portions, wherein one axial end of each of the resilient leg insertion opening portions is adapted for inserting the resilient legs through the resilient leg insertion opening portions and the one axial end of each of the resilient leg insertion opening portions is adapted to contact against a protruding portion or a thick-walled portion which protrudes in one axial direction on a middle portion or a root end of each of the resilient legs.