Valve for dispensing a measured volume of fluid fr

专利名称：Valve for dispensing a measured volume of

fluid from a container containing a fluidsubstance under pressure

发明人：Michel Brunet申请号：US06/691816申请日：19850116公开号：US04577784A公开日：19860325

摘要：The valve has a variable volume chamber (11) of annular section between anouter tubular body (1) and a coaxial member (4). An annular piston (5) is free to moveaxially to vary the volume of the chamber under the combined forces of a return spring(6) and the pressure in the container. A controllable plunger (7) is subject to the force ofa return spring (8) and to control force from a user. In the rest position the plungerleaves the variable volume chamber in communication with the interior of the container,and thus with the substance to be dispensed. When pressed against its return spring (8),the plunger isolates the variable volume chamber from the interior of the container andputs the variable volume chamber in communication with the outside. A pressuredifference thus appears across the piston (5) and the piston moves along the variablechamber against the force of its return spring (6) to dispense a measured volume ofsubstance. When the plunger (7) is released, the inside pressure of the container is againapplied to both faces of the piston (5), allowing the return spring (6) to refill the variablevolume chamber (11) with a further volume of substance to be dispensed.

申请人：ETABLISSEMENTS VALOIS

代理机构：Sughrue, Mion, Zinn, Macpeak and Seas

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