Hydrostatic drain plug
AssigneeUdo Jattke
InventorMitchell Lee Lewis
Life of this patent
Estimating the term…
Abstract
A hydrostatic drain plug/outlet assembly comprises a hollow body (1) with an inlet port and an outlet port for connection to a fluid conduit. A slidable valve member (6) is movable between a locked open position and a locked closed position via an intermediate position at which the valve member (6) is urged into sealing engagement with a sealing member (3) by a spring (21) which supports a hydrostatic pressure of predetermined magnitude beyond which excess hydrostatic pressure is relieved by the valve member to prevent fluid overflow in a vessel. The valve member is moved between the locked open position and the locked closed position by rotation of valve member (6).
Claims9
A hydrostatic waste plug fitting for a drain opening in a bathtub or hand basin, said fitting comprising:
- hollow body having an inlet end and an outlet end, the outlet end being adapted for connection to a waste conduit;
- a valve seat member secured within said hollow body, said valve seat member defining a substantially unobstructed aperture;
- a valve support member within said hollow body;
- a support shaft slidably mounted in said valve support member;
- a valve member attached to said support shaft;
- a resilient biassing spring to urge said valve member to a normally closed position against said valve seat member;
- and
- locking means to selectively lock said valve member in an open position;
- said valve member, in an unlocked condition, being movable under the influence of a predetermined hydrostatic pressure between a closed position and an open position, and movable under the influence of said biassing spring between an open position and a closed position after reduction of said predetermined hydrostatic pressure to maintain a predetermined level of liquid in the bathtub or hand basin;
- and
- said valve seat member, valve member, support shaft, valve support member and biassing spring being removable from said hollow body via said inlet end;
- said waste plug fitting characterised in that when said valve member is in an open position, a substantially unobstructed fluid pathway is provided between said inlet end and said outlet end to enable debris to be flushed therethrough.
A hydrostatic waste plug fitting for a drain opening in a bathtub or hand basing, said fitting comprising:
- a hollow body having an inlet and outlet end, the outlet end being adapted for connection to a waste conduit;
- a valve seat member secured within said hollow body, said valve seat member defining a substantially unobstructed drain aperture;
- a valve support member within said hollow body;
- a support shaft slidably mounted in said valve support member;
- a valve member attached to said support shaft;
- a resilient biassing spring to urge said valve member to a normally closed position against said valve seat member, said biassing spring being housed in a shroud means to prevent contact with foreign matter entering said hollow body via said inlet end;
- and
- locking means to selectively lock said valve member in an open position;
- said valve member, in an unlocked condition, being movable under the influence of a predetermined hydrostatic pressure between a closed position and an open position, and movable under the influence of said biassing spring between an open position and a closed position after reduction fo said predetermined hydrostatic pressure to maintain a predetermined level of liquid in the bathtub or hand basin;
- said valve seat member, valve member, support shaft, valve support member and biassing spring being removable from said hollow body via said inlet end;
- and
- wherein said locking means comprises tapered surfaces on said valve member and said valve support member co-operative to urge said valve member to an open position against the influence of said biassing spring when said valve member is selectively rotated relative to said valve support member.
Dependencies are inferred from the claim text.