A negative pressure pipeline opening-and-closing device includes a blocking member and a buoyant member. The buoyant member comprises two floats and a connection rod connected to the two floats. The liquid reservoir is provided with a guide therein, and the guide confines the two floats, the blocking member and the liquid outlet port in the same vertical line. A limiting member is arranged between the two floats and is fixed to an inner wall of the liquid reservoir. A maximum distance between the limiting member and a top wall of a lower float of the two floats is smaller than a maximum distance between a top wall of an upper float of the two floats and a top wall of the liquid reservoir. The negative pressure pipeline opening-and-closing device can replace an existing electrically controlled valve. Therefore, the cost is reduced, the maintenance is convenient and service life is prolonged.

A level gauge includes a housing, a vertical member, and a perpendicular member. The housing includes a bottom wall and a side wall. A surface of the side wall includes a first scale. The bottom wall and the side wall enclose a receiving cavity. The vertical member is arranged in the receiving cavity and includes an axis maintained in a vertical orientation in a natural state. A center of gravity of the perpendicular member is arranged on top of the vertical member. A plane of the perpendicular member is maintained perpendicular to the axis of the vertical member. When the bottom wall is placed on a gauging surface, an inclination angle and inclination direction of the gauging surface are obtained simultaneously.

A level gauge includes a housing, a vertical member, and a perpendicular member. The housing includes a bottom wall and a side wall. A surface of the side wall includes a first scale. The bottom wall and the side wall enclose a receiving cavity. The vertical member is arranged in the receiving cavity and includes an axis maintained in a vertical orientation in a natural state. A center of gravity of the perpendicular member is arranged on top of the vertical member. A plane of the perpendicular member is maintained perpendicular to the axis of the vertical member. When the bottom wall is placed on a gauging surface, an inclination angle and inclination direction of the gauging surface are obtained simultaneously.

The present disclosure provides a return gas prevention device for a drainage pipe, belonging to the technical field of drainage pipes. The device realizes two functions of water seal and a check valve simultaneously, as well as prevents gas channeling in a drainage process.

A toilet seat assembly is provided including a seat base with a housing and a seat lid, and further including a washing apparatus, a drying apparatus, and a spray canister device positioned in the housing. A controller having a user interface is configured to communicate with a control unit of the toilet seat assembly to control operation of the components of the toilet seat assembly. So configured, a user may operate the toilet seat assembly to clean the user's perineal region via the washing apparatus, dry the user's perineal region via the drying apparatus, and spray the user's perineal region with one or more liquid products via the spray canister device.

A toilet seat assembly is provided including a seat base with a housing and a seat lid, and further including a washing apparatus, a drying apparatus, and a spray canister device positioned in the housing. A controller having a user interface is configured to communicate with a control unit of the toilet seat assembly to control operation of the components of the toilet seat assembly. So configured, a user may operate the toilet seat assembly to clean the user's perineal region via the washing apparatus, dry the user's perineal region via the drying apparatus, and spray the user's perineal region with one or more liquid products via the spray canister device.

Self-closing aquarium valves to consistently acclimate fish to temperature and pH of a new tank with minimal monitoring are described. The self-closing aquarium valve includes a frame, an automatic stopper hingedly connected to the frame that closes automatically, and a hose that provides fluid communication from the new tank to a holding tank, and an adjustable flow control. The self-closing aquarium valve provides consistent acclimation of a fish from the holding tank to a new tank through the adjustable flow control with minimal monitoring with the automatic stopper.

A pivotable downspout extension system includes an adapter coupleable to a fixed-position downspout via a downspout aperture, a bucket hingedly coupleable to the adapter, and an extension arm. The extension arm is received by an extension arm receiving portion located on the bucket. The bucket and the extension arm remain in a substantially vertical position until a sufficient amount of water enters the bucket so as to overcome the weight of a weight chamber of the bucket and move the bucket's center of gravity. The bucket with the extension arm then pivots on a fulcrum point, allowing the water to exit the extension arm. Once emptied, the weight chamber of the bucket pivots the bucket and extension arm to the substantially vertical position.

A pivotable downspout extension system includes an adapter coupleable to a fixed-position downspout via a downspout aperture, a bucket hingedly coupleable to the adapter, and an extension arm. The extension arm is received by an extension arm receiving portion located on the bucket. The bucket and the extension arm remain in a substantially vertical position until a sufficient amount of water enters the bucket so as to overcome the weight of a weight chamber of the bucket and move the bucket's center of gravity. The bucket with the extension arm then pivots on a fulcrum point, allowing the water to exit the extension arm. Once emptied, the weight chamber of the bucket pivots the bucket and extension arm to the substantially vertical position.

A fully-integrated, flow-control module for top-fill fuel tanks operates with a fuel line attached that supplies fuel under pulsating pressure. There are two bleed paths in the module, which open and close sequentially in response to the position of a fuel float within the module. In order for a main valve plunger, which controls fuel entry into the tank, to fully close, both bleed paths must be closed. A first bleed path closes first, followed by closure of the second. For the main valve plunger to fully open, both bleed paths must be open. The second bleed path opens first. Movement of the main valve plunger is controlled by both a biasing spring and pressure beneath the plunger. Pressure beneath the plunger builds up to a level sufficient for the biasing spring to fully close the plunger against a valve seat when both bleed paths are closed.