초록 ▼

A pump system having two moving parts consisting of a cylinder with a piston therein defining a pump chamber. An inlet part communicates with a dip tube which extends into a container and permits the product in the container to pass into the pump chamber. An outlet port allows for the product thus d

A pump system having two moving parts consisting of a cylinder with a piston therein defining a pump chamber. An inlet part communicates with a dip tube which extends into a container and permits the product in the container to pass into the pump chamber. An outlet port allows for the product thus drawn to be dispensed from the pump chamber. The pump is actuated by pressure directed axially on the piston, forcing it into the cylinder. Fitted with a return device the piston is allowed to reciprocate in the cylinder alternating between a suction and compression stroke. During the suction stroke product is drawn into the pump chamber by way of the inlet port while the compression stroke provides for the dispensing of the product thus drawn via the outlet port. The system is equipped with passages and channels sufficient to accomplish the operation of drawing and dispensing the product in addition to providing for the venting of the container. The suction stroke provides for air to be drawn through the outlet part from the ambient into the pump chamber, advantageously removing any residual product from the outlet part where this is desirable. In certain applications the air is drawn into the pump chamber to assist in the dispensing of the product during the compression stroke. The introduction of air into the pump chamber also assures the presence of an air pocket therein, thereby maintaining a resiliency in the system thereby preventing piston “hang up”. Embodiments of the pump system are disclosed having a vertical pump axis equipped with a vertically reciprocal finger actuated button on having either a vertical or horizontal axis with a trigger actuator. Different cylinder and piston configurations are disclosed facilitating commercial applications of the system.

대표청구항 ▼

A dispensing pump system for dispensing product from a container, the pump serving as a container closure, comprising: an outer part; an inner part in the outer part defining a pump chamber therewith, and the parts being relatively reciprocal through a compression stroke from an extended position to

A dispensing pump system for dispensing product from a container, the pump serving as a container closure, comprising: an outer part; an inner part in the outer part defining a pump chamber therewith, and the parts being relatively reciprocal through a compression stroke from an extended position to an inserted position and through a suction stroke from the inserted position to the extended position; inlet port means for cooperating in communicating the container interior with the pump chamber during the suction stroke to permit product to enter into the pump chamber from the container interior solely by creating a negative pressure differential between the pump chamber relative to the container interior to cause product to be sucked into the pump chamber; outlet port means for product to be dispensed under pressure from the pump chamber during the compression stroke; venting means for replacing product removed from the container interior into the pump chamber with air; and the inner and outer part defining cooperating surfaces for sequentially opening and closing the inlet and outlet port means during the relative reciprocation of the parts during the pumping cycle to permit product to enter the pump chamber and dispense it from the pump chamber without the necessity of external inlet and outlet check valves.