An inflow fitting for the filling of a cistern comprises a housing, a water conduit disposed in the housing and having an entry and an exit, a float-controlled valve, which is disposed in the water conduit and which shuts off the water conduit or opens it up in the filling operation, and a float, which cooperates with the valve, for controlling the valve, wherein the float has a cavity, which is fillable with water, and at least one buoyancy chamber. The inflow fitting further comprises a supplemental water tap, branched off from the water conduit, for filling the said cavity in order to provide an additional weight. In the water conduit, in the region of the supplemental water tap, is arranged at least one backflow element, with which a backflow can be provided in the region of the supplemental water tap for the pressure-independent removal of supplemental water.

An improved toilet fill valve designed to replace a damaged toilet tank valve within a toilet. The improved toilet fill valve includes a first quick connect coupling which separates an upper section of a pipe body mounted to a float from a lower section of the pipe body mounted to an opening located at a bottom of a cistern tank within the toilet. The first quick release coupling includes a female component threadedly attached to the upper section of the pipe body. The first quick release coupling includes a male component end that can be threadedly attached to the lower section of the pipe body.

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.

An improved toilet fill valve designed to replace a damaged toilet tank valve within a toilet. The improved toilet fill valve includes a first quick connect coupling which separates an upper section of a pipe body mounted to a float from a lower section of the pipe body mounted to an opening located at a bottom of a cistern tank within the toilet. The first quick release coupling includes a female component threadedly attached to the upper section of the pipe body. The first quick release coupling includes a male component end that can be threadedly attached to the lower section of the pipe body.

An inflow fitting for the filling of a cistern comprises a housing, an outlet pipe, and a water passage formed in the housing and outlet pipe and having an entry and an exit, a float-controlled valve, which is disposed in the water passage and which shuts off the water passage or opens it up in the filling operation, and a float, which cooperates with the valve, for controlling the valve, wherein the float has a cavity that is fillable with water, and at least one buoyancy chamber. The inflow fitting further comprises a supplemental water tap, branched off from the water passage, for filling the said cavity in order to provide an additional weight. In the water passage, in the region of the supplemental water tap, is arranged at least one backflow element, with which a backflow can be provided in the region of the supplemental water tap for the pressure-independent removal of supplemental water.

An inlet valve having a shortened lifting lever mechanism includes a main body having defined therein a compression hole and a waterway passage; a sealing pad; a float; and a shortened lifting lever mechanism that is rotatably connected to the main body, that comprises at least two lever stages each having a fulcrum, respectively, and that include a first stage lever, and a last stage lever that are connected in a driving way. The float is coupled to the first stage lever so that a dynamic body is formed to drive the shortened lifting lever mechanism to move. The sealing pad is assembled to the last stage lever so that the sealing pad opens or closes the compression hole with the movement of the shortened lifting lever mechanism when the float moves up and down. A method of shortening a lifting lever mechanism of an inlet valve is also disclosed.

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.

An automatic leak-proof water inlet device for a water tank, including an inner cylinder, an outer cylinder set, a floating casing and an assist floating set; wherein the outer cylinder set is consisted of an outer cylinder, a cover, a first connecting rod, a second connecting rod, an adjusting rod, an interlocking rod, an insert, a water stopper, a first spring and a second spring; the assist floating set includes a supporting seat and a float; by the above structure, it could stop water leakage of water tank automatically and close water inlet in time, to thereby avoid the waste of water resources.

A buoyant float including a body having an interior defined in part by a side wall and a bottom extending inward from the side wall. The side wall has an upper edge defining an open top of the body. The float includes a cover sized and shaped for covering the top of the body. The cover attaches to the body to maintain the cover in position relative to the body to cover the open top. The cover has a tubular skirt extending downward and around the upper edge of the body side wall when the cover is in position covering the top of the body. An air pocket is created at an interface between the cover and the body when the float is positioned in liquid to isolate the interface from the liquid and prevent liquid from entering the hollow interior of the body through the interface.

An automatic leak-proof water inlet device for a water tank, including an inner cylinder, an outer cylinder set, a floating casing and an assist floating set; wherein the outer cylinder set is consisted of an outer cylinder, a cover, a first connecting rod, a second connecting rod, an adjusting rod, an interlocking rod, an insert, a water stopper, a first spring and a second spring; the assist floating set includes a supporting seat and a float; by the above structure, it could stop water leakage of water tank automatically and close water inlet in time, to thereby avoid the waste of water resources.