Variable capacity metering dispenser

Claim 1

A FLUID DISPENSER COMPRISING A TOP CLOSURE MEMBER; A MOTOR SUPPORT BASE MEMBER; A MOTOR INCLUDING A DRIVE SHAFT, ONE END OF SAID DRIVE SHAFT BEING JOURNALED IN BEARING MEANS IN SAID TOP CLOSURE MEMBER, AND THE OTHER END OF SAID DRIVE SHAFT BEING JOURNALED IN BEARING MEANS IN SAID MOTOR SUPPORT BASE MEMBER, SAID DRIVE SHAFT EXTENDING THROUGH SAID MOTOR SUPPORT BASE MEMBER FOR A DISTANCE SUFFICIENT TO BE ENGAGED WITH THE ROTOR MEANS OF A PUMPING UNIT; A HOUSING SURROUNDING SAID MOTOR, ONE END OF SAID HOUSING BEING IN ENGAGEMENT WITH THE LOWER PART OF SAID TOP CLOSURE MEMBER AND THE OTHER END OF SAID HOUSING BEING IN ENGAGEMENT WITH THE UPPER PART OF SAID MOTOR SUPPORT BASE MEMBER; MEANS RIGIDLY CONNECTING SAID TOP CLOSURE MEMBER AND SAID MOTOR SUPPORT BASE MEMBER TOGETHER, WITH SAID MOTOR HOUSING AND MOTOR CLAMPED THEREBETWEEN; A BOTTOM CLOSURE MEMBER; A PUMPING UNIT ASSEMBLY, WHEREIN THE BOTTOM SURFACE OF SAID MOTOR SUPPORT BASE MEMBER AND THE UPPER SURFACE OF SAID BOTTOM CLOSURE MEMBER FORM TOP AND BOTTOM CLOSURES RESPECTIVELY FOR SAID PUMPING UNIT ASSEMBLY, SAID PUMPING UNIT ASSEMBLY INCLUDING A ROTOR RIGIDLY CONNECTED TO THE LOWER END OF SAID MOTOR DRIVE SHAFT, AND A STATIONARY RING MEMBER; MEANS PREVENTING ROTATION OF SAID RING MEMBER WITH RESPECT TO SAID MOTOR SUPPORT BASE MEMBER; MEANS RIGIDLY CONNECTING SAID BOTTOM CLOSURE MEMBER WITH SAID MOTOR SUPPORT BASE MEMBER, WITH SAID PUMPING UNIT ASSEMBLY TIGHTLY CLAMPED THEREBETWEEN IN FLUID TIGHT RELATIONSHIP; FLUID INLET MEANS CONNECTED TO SAID BOTTOM CLOSURE MEMBER, SAID FLUID INLET MEANS BEING ADAPTED FOR OPEN COMMUNICATION AT ITS DISTAL END WITH A SOURCE OF FLUID SUPPLY; A FLUID INLET CHAMBER FORMED IN SAID BOTTOM CLOSURE MEMBER; A FLUID OUTLET CHAMBER FORMED IN SAID BOTTOM CLOSURE MEMBER; AN INLET VALVE PORT FORMED IN THE TOP WALL OF SAID BOTTOM CLOSURE MEMBER, SAID INLET VALVE PORT AFFORDING FLUID COMMUNICATION BETWEEN SAID INLET CHAMBER AND THE INLET SIDE OF SAID PUMPING UNIT ASSEMBLY; A FLUID OUTLET VALVE PORT FORMED IN THE TOP WALL OF SAID BOTTOM CLOSURE MEMBER, SAID FLUID OUTLET VALVE PORT AFFORDING FLUID COMMUNICATION BETWEEN THE OUTLET SIDE OF SAID PUMPING UNIT ASSEMBLY AND SAID OUTLET CHAMBER; AN AXIALLY DISPOSED OPENING IN SAID SUPPORT BASE MEMBER AT THE BOTTOM SURFACE THEREOF, AN AXIALLY DISPOSED OPENING IN SAID STATIONARY RING MEMBER, A PIN, SAID OPENINGS BEING IN REGISTER AND SAID PIN BEING POSITIONED PARTIALLY IN THE OPENING OF SAID SUPPORT BASE MEMBER AND PARTIALLY IN SAID STATIONARY RING MEMBER WHEREBY SAID INLET VALVE PORT AND SAID INLET SIDE OF SAID PUMPING ASSEMBLY UNIT ARE IN ALIGNMENT AND SAID FLUID OUTLET VALVE PORT AND SAID OUTLET SIDE OF SAID PUMPING ASSEMBLY UNIT ARE IN ALIGNMENT, AND CONDUIT MEANS CONNECTED IN OPEN COMMUNICATION WITH SAID FLUID OUTLET CHAMBER, SAID CONDUIT MEANS HAVING AT ITS DISTAL END DISPENSING NOZZLE MEANS FOR SAID FLUID, MOTOR SWITCH MEANS, INCLUDING A ROTATABLE OPERATING SHAFT, POSITIONED WITHIN THE CONFINES OF SAID TOP CLOSURE MEMBER; AND A NOZZLE HOLDER RIGIDLY CONNECTED TO THE OUTER END OF SAID ROTATABLE OPERATING SHAFT WHICH EXTENDS THROUGH SAID TOP CLOSURE MEMBER; WHEREBY, WHEN SAID DISPENSING NOZZLE IS POSITIONED IN SAID NOZZLE HOLDER, THE WEIGHT OF SAID DISPENSING NOZZLE CAUSES ROTATION OF SAID NOZZLE HOLDER AND OPERATING SHAFT IN ONE DIRECTION TO AUTOMATICALLY OPEN SAID MOTOR SWITCH, AND REMOVAL OF SAID DISPENSING NOZZLE FROM SAID NOZZLE HOLDER CAUSES ROTATIONS OF SAID NOZZLE HOLDER AND OPERATING SHAFT IN THE OPPOSITE DIRECTION TO AUTOMATICALLY CLOSE SAID MOTOR SWITCH.