Disclosed are various embodiments of a lockable toilet fill valve and methods according to the present invention. In one embodiment, a toilet fill valve includes a float/arm assembly. The toilet fill valve is closed when the float/arm assembly is disposed in a first position. The toilet fill valve being open when the float/arm assembly is disposed in a second position. A shuttle switch is associated with the float/arm assembly. The shuttle switch includes an unlock position and a lock position, wherein the shuttle switch fixes the float/arm assembly in the first position when the shuttle switch is in the lock position.

Disclosed are various embodiments of a lockable toilet fill valve and methods according to the present invention. In one embodiment, a toilet fill valve includes a float/arm assembly. The toilet fill valve is closed when the float/arm assembly is disposed in a first position. The toilet fill valve being open when the float/arm assembly is disposed in a second position. A shuttle switch is associated with the float/arm assembly. The shuttle switch includes an unlock position and a lock position, wherein the shuttle switch fixes the float/arm assembly in the first position when the shuttle switch is in the lock position.

A wrench for securing, actuating and preventing tampering with a fire hydrant is disclosed. In useful embodiments, the wrench can be a two-ended wrench having a loop that encloses a pentagonal opening at either end of an elongated handle, where the handle can include in a nonterminal portion a slot. In a locking mode, the wrench can accept at a first end an actuating nut of the fire hydrant and can be locked in place by inserting a locking arm of a padlock through an eye bolt that is secured to a side of the fire hydrant and inserted through the slot. The wrench can be unlocked and removed, whereupon a second end can be used to turn the actuating nut as well as to remove water outlet caps and adjust nozzles.

A flow passage device includes a circulation flow passage, a swing valve provided in the circulation flow passage, an energizing part, and a lock mechanism including a lock pin. The lock pin is configured so as to hinder the swing valve from opening, and to allow the swing valve to open. The swing valve is configured so as to rotate from a first valve position to a second valve position. The lock mechanism is configured so as to set a locked state and to set an unlocked state. The lock pin is configured so as to protrude as being energized by pressure of the fluid on an upstream side of the swing valve, and to retract as being energized by pressure of the fluid on a downstream side of the swing valve.

An airflow control valve structure includes a metal connecting shaft and a plastic valve body. The connection shaft includes an embedded portion. The connecting shaft is configured to rotate about a rotation axis. The embedded portion is embedded so that the valve body rotates integrally with the connecting shaft. The airflow control valve structure further includes a rotation restriction portion and a movement restriction portion. The rotation restriction portion is located on the embedded portion and restricts rotation of the embedded portion relative to the valve body. The movement restriction portion is located on the embedded portion and restricts movement of the embedded portion relative to the valve body in a direction along the rotation axis.

An airflow control valve structure includes a metal connecting shaft and a plastic valve body. The connection shaft includes an embedded portion. The connecting shaft is configured to rotate about a rotation axis. The embedded portion is embedded so that the valve body rotates integrally with the connecting shaft. The airflow control valve structure further includes a rotation restriction portion and a movement restriction portion. The rotation restriction portion is located on the embedded portion and restricts rotation of the embedded portion relative to the valve body. The movement restriction portion is located on the embedded portion and restricts movement of the embedded portion relative to the valve body in a direction along the rotation axis.

A self-locking apparatus for a gear set permits forward-driving an input in clockwise or counterclockwise directions and substantially prevents an output from being driven in either or both of those directions. The device includes a gear set with planet gears arranged within a planet carrier within a fixed ring gear. Each of the planet gears is engaged with the planet carrier via a differentiating connector retained in an elongated slot in the planet carrier where it moves to the clockwise position when being forward driven in the clockwise direction and, when the planet carrier is back driven in the clockwise direction, the connector moves to the counter-clockwise position in the slot. This arrangement allows the gear set to be forward driven but not back driven. This differentiated action can engage/disengage with any form of unidirectional engage/disengage mechanism. The apparatus is useful in industrial applications requiring self-locking gear sets.

A self-locking apparatus for a gear set permits forward-driving an input in clockwise or counterclockwise directions and substantially prevents an output from being driven in either or both of those directions. The device includes a gear set with planet gears arranged within a planet carrier within a fixed ring gear. Each of the planet gears is engaged with the planet carrier via a differentiating connector retained in an elongated slot in the planet carrier where it moves to the clockwise position when being forward driven in the clockwise direction and, when the planet carrier is back driven in the clockwise direction, the connector moves to the counter-clockwise position in the slot. This arrangement allows the gear set to be forward driven but not back driven. This differentiated action can engage/disengage with any form of unidirectional engage/disengage mechanism. The apparatus is useful in industrial applications requiring self-locking gear sets.

A rising stem valve comprises a hollow valve body having a pair of ports defining a flow path through the valve body, a flange base through which one of the ports extends and a valve bonnet opposite the flange base. The valve includes a plunger/seal assembly able to be extended within the valve body to a first position for sealing the port in the flange base and to a second position for unsealing the port in the flange base. The valve also includes a locking mechanism for securing the plunger/seal assembly in the first position. The locking mechanism includes at least one cam lever attached to the valve body and a corresponding groove in a valve stem of the plunger/seal assembly.

A safety faucet has a safety button which is positioned in front of a lever and slidingly moves in the front/back direction, and when the safety button is pressed, a cap contacting part on the lower end of the safety button rotates while forming a support point with respect to the upper surface of an upper cap; and has a fixed pin, which passes through an insertion groove formed on the upper end of an operation shaft, fixed together with the body of the lever, thereby preventing the lever from shaking left and right.