Abstract: A fluid injector for connecting a connection port of a container or tank includes a housing and a transmission mechanism disposed in the housing. The housing has a fluid inlet and a fluid outlet surrounded by an annular wall. A control valve is provided in the housing for opening and closing the fluid inlet. One end of the transmission mechanism is connected to the control valve, and another end of the transmission mechanism is connected to a movable post passing through the annular wall. When the control valve opens or closes the fluid inlet, the transmission mechanism is driven by the control valve, and the movable post extends out of the annular wall to be engaged with the connection port or retracts into the annular wall, thereby determining the connection state of the fluid injector and the connection port and ensuring that the movable post is exactly controlled.

Abstract: The fluid dispenser includes a body, a door and a stop structure. The body has a nozzle. The stop structure is disposed at the nozzle. When the fluid is introduced into a container and thereby opens an exit disposed at the nozzle, the stop structure blocks an opening of the container from inside so as to confine the nozzle to the opening of the container. It is only when the fluid stops moving out of the exit and thus the door closes the exit that the stop structure no longer blocks the opening of the container, thereby allowing a user to remove the body from the container and thus prevent the fluid from splashing while being dispensed.

Abstract: A helmet with ventilation arrangement comprises a housing, an inner honey-comb like impact resistant layer shaped to the head of rider, a protective covering spaced above and formed integrally with the housing, and a chamber enclosed by housing and protective covering being open to outside in the front side for introducing air therein. Chamber has a net strap in the front side for preventing foreign objects from entering and one or more inner channels being in communication with the inner space of helmet through a passageway. In riding a motorcycle, air may enter into chamber. Moreover, such fresh air flows through channel passageway, and honeycomb-like impact resistant layer so as to be in contact with every part of the head of rider.

Abstract: An auto-separating two-way check valve comprises a male and female joints wherein male joint comprises a left first retainer, a right first retainer, a first cavity between left first and right first retainers, a first flange, a first recess, and a first disk; a female joint having a second cavity, an inner flange, a second disk movable in second cavity, a left second retainer, a right second retainer, a first cavity between left second and right second retainers, a second flange, a second recess, and a second disk; a first pipe having holes on one open end and a first cap on the other end extended to the female joint; a second pipe having holes on one open end and a second cap on the other end received in the female joint; and springs wherein male joint connects to an open end of first pipe, female joint connects to an open end of second pipe, first disk is biased between first and second springs and received in first recess, and first pipe is through first recess to engage with second pipe; and second disk