초록 ▼

This relates to a dispenser for paste-like products wherein there is a pump chamber disposed between a container for the product and a dispensing opening and the pump chamber and an adjacent duct have associated therewith flow control inlet and outlet valves. The principal feature resides in the pro

This relates to a dispenser for paste-like products wherein there is a pump chamber disposed between a container for the product and a dispensing opening and the pump chamber and an adjacent duct have associated therewith flow control inlet and outlet valves. The principal feature resides in the provision of a separate insert which is telescoped between a container and a head member and which insert defines a pump cylinder and a discharge duct and carries and inlet valve element and an outlet valve element. The inlet valve element is integrally formed with the insert while the outlet valve element may be selectively formed integrally with the insert or as a separate insert which may be readily incorporated within the primary insert.

대표청구항 ▼

An insert for mounting on a dispensing container beneath a separate head member, said insert comprising a base, walls extending from said base in a direction normal to said base and defining a pump chamber and a dispensing duct, said pump chamber and dispensing duct being open at their ends remote s

An insert for mounting on a dispensing container beneath a separate head member, said insert comprising a base, walls extending from said base in a direction normal to said base and defining a pump chamber and a dispensing duct, said pump chamber and dispensing duct being open at their ends remote said base to permit a piston carried by said head member to be introduced into said pump chamber through its open end and to permit a discharge passage in said head member to be coupled to said dispensing duct, an outlet opening in said pump chamber and an inlet opening in said duct adjacent said base and in communication with each other for transferring a flowable product from said pump chamber to said duct, an inlet flow control valve carried by said insert for controlling product flow into said pump chamber from an opening in said container, and a back flow control valve in said duct for preventing back flow of a flowable product from said duct towards said pump chamber.