Controlled volume liquid meter defining improved plunger means

Details Controlled volume liquid meter defining improved plunger means Controlled volume liquid meter defining improved plunger means

G - Physics

01

F

73/143

G01F 11/04 (2006.01) G01F 3/20 (2006.01) G01F 15/00 (2006.01)

Patent

CA 1117317

CONTROLLED VOLUME LIQUID METER DEFINING IMPROVED PLUNGER MEANS Inventor: Nicholas Zissimopoulos ABSTRACT OF THE DISCLOSURE A controlled volume liquid meter comprises a liquid metering chamber defined between a rigid wall and an opposed flexible membrane wall. Inlet and outlet ports are positioned adjacent the ends of the chamber with the ports defining paths of liquid flow therethrough which are transverse to the direction of liquid flow in the cham- ber. A pair of plunger members are provided, along with means for alternatingly pressing the plunger members against the membrane wall and inserting the plunger members into the inlet and outlet ports to alternatingly open and close them. In accordance with this invention, the plunger members pos- sess means permitting variation of the length of each plun- ger member, with spring means urging the plunger members to occupy their maximum lengths. As a result of this, the force with which the plunger members press against the mem- brane wall is limited to a value governed by the spring means.

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