B - Operations – Transporting – 05 – B
Patent
B - Operations, Transporting
05
B
222/78
B05B 11/00 (2006.01) B65D 47/34 (2006.01)
Patent
CA 1150689
ABSTRACT OF THE DISCLOSURE A valveless pump system having two moving parts con- siting 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 contain- er 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 dis- pensing 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 verti- cally reciprocal finger actuated button or having either a vertical or horizontal axis with a trigger actuator. Different cylinder and piston configurations are disclosed facilitating commercial applications of the system.
397645
Leeds And Micallef
Marks & Clerk
LandOfFree
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