Patent ID: 6185755
Filing Date: 2001-02-13
Classification: E03C

Abstract:
Apparatus for flushing a drain pipe with an accessible open end, said apparatus including:a valve assembly with a hollow body connectable to a source of liquid under pressure for the supply of liquid under pressure to the interior of the hollow body, the hollow body having an open end positionable in communication with the open end of the drain pipe,a valve member mounted for sliding movement in the valve body between a closed position in which the valve member prevents flow of liquid under pressure from the source thereof through the hollow body to the open end thereof, and an open position in which the valve member permits flow of liquid from the source thereof through the hollow body to the open end thereof,the valve member having an actuating portion projecting from an opposite end of the hollow body, and spring means biasing the valve member towards the closed position,the actuating portion of the valve member being manually engageable to move the valve member by manual pressure to the open position against the action of the spring means, when the open end of the hollow body has been positioned over the open end of the drain pipe and the hollow body has been connected to the source of liquid under pressure,whereby the valve assembly is held against the open end of the drain pipe by said manual pressure and liquid under pressure from the source thereof flows through the hollow body into the drain pipe to flush undesirable matter therefrom and/or to dislodge blocking material in the pipe,the spring means surrounding the valve member within the hollow body and acting between a stop projecting inwardly from the hollow body and the actuating portion of the valve member, the valve member carrying two vertically spaced sealing rings engaging the interior of the hollow body above and below a circumferential recess in the valve member, the circumferential recess being in communication with an inlet through which the liquid under pressure is supplied to the interior of the hollow body, andthe valve member being movable downwardly by manual pressure on the actuating portion against the action of the spring means to an open position in which the lower sealing ring is out of engagement with the interior of the hollow body to permit the liquid under pressure to flow from the inlet through the circumferential recess and through the open end of the hollow body, andthe interior of the hollow body being provided with guides spaced at intervals around the interior thereof to guide the lower sealing ring when the valve member is moved to the open position.