Abstract: A smooth pouring spout for attachment to a container having an opening in a upper wall thereof, has a device for locking and sealing the spout to the container. The pouring spout includes two component parts. A flat ring is adapted to surround the opening with the ring having radially inwardly directed flexible fingers and a spout member is insertable through the ring and the opening in the container to flex the fingers into a gripping relationship with a continuous edge of the container surrounding the opening. The spout member includes a large passage through which liquid can be removed from the container while air is introduced into the container through a smaller passage.

Abstract: A liquid metering dispenser is actuated by a trigger. The trigger releases a valve rod which is spring actuated to close a fluid pressure inlet, opening the discharge outlet of the dispenser to release a stored measured charge of liquid by operation of a spring actuated piston. The trigger is cocked by drawing the valve rod to close the discharge valve and open the liquid pressure inlet; the liquid under pressure enters the storage chamber, compressing the piston spring until it strikes an adjustable stop. The piston and spring assembly is readily removable for cleaning and servicing.

Abstract: An adapter for attaching and sealing a liquid supply reservoir on a liquid dispenser of the metering type comprises a reservoir receiving body and a detachable element for securing the body to a dispenser with a seal piercing needle in position to receive the contents of the reservoir. A pivoted clamp is provided for clamping the reservoir on the body when the seal has been pierced and holds the reservoir securely to the body during use of the dispenser. A nut secures the detachable element on the dispenser, a spring bias being provided to afford adjustment of the element with respect to the nut. A check valve is provided to prevent return of liquid to the reservoir and facilitates the use of collapsible supply reservoirs.