Abstract: An apparatus and method for emptying and filling a fluid container. A flow-actuated valve inside a fill tube regulates the flow through the fill tube. A cap containing the valve and a vent tube can be installed on a modified bottle used to supply water dispensers, thus enabling a user to continuously replenish the bottle from a remote supply. Alternatively, a cap containing the valve, a vent tube, and two fluid level sensors can be installed on a conventional bottle. A user is thus relieved of the burden of repetitive bottle changing, and is able to treat the water to his own specifications.

Abstract: An apparatus and method for emptying and filling a fluid container. A valve is constructed in part of two concentric tubes. Flow of a fluid through the outer tube of two concentric tubes is regulated by the flow of the same or another fluid through the inner tube. The two flows can be in the same or opposite directions. A cap containing the valve and a vent tube can be installed on a modified bottle used to supply water dispensers, thus enabling a user to continuously replenish the bottle from a remote supply. Alternatively, a cap containing the valve, a vent tube, and two fluid level sensors can be installed on a conventional bottle. A user is thus relieved of the burden of repetitive bottle changing, and is able to treat the water to his own specifications.

Abstract: An apparatus and method for emptying and filling a fluid container. A flow-actuated valve inside a fill tube regulates the flow through the fill tube. A cap containing the valve and a vent tube can be installed on a modified bottle used to supply water dispensers, thus enabling a user to continuously replenish the bottle from a remote supply. Alternatively, a cap containing the valve, a vent tube, and two fluid level sensors can be installed on a conventional bottle. A user is thus relieved of the burden of repetitive bottle changing, and is able to treat the water to his own specifications.

Abstract: An automatic gate opener lock. The gate opener lock has a locking bolt which is moved between locked and unlocked positions by the movement of swing arm of an automatic gate opener. To prevent movement of the locking bolt toward its locked position before the gate is closed, springs are arranged for resisting movement in that direction. The springs have a combined resistive force greater than the force required to move the gate. Only when the gate is closed, and the force from the swing arm may no longer be dissipated through gate movement, is the combined force of the springs overcome, and the locking bolt moved into the locked position.