Method and apparatus for dispensing viscous substances

Claim 1

A SELF-CONTAINED PORTABLE GUN FOR DISPENSING A VISCOUS SUBSTANCE SUCH AS GREASE OR THE LIKE, INCLUDING A BARREL HAVING AN OUTLET AND A FILLING OPENING, A CHECK VALVE IN THE BARREL BETWEEN SAID OUTLET AND FILLING OPENING, A RECIPROCAL PLUNGER IN THE BARREL AND MEANS FOR OPERATING IT, SAID FILLING OPENING BEING IN COMMUNICATION WITH THE BARREL WHEN THE PLUNGER IS IN AN INOPERATIVE POSITION, SAID PLUNGER CLOSING SAID FILLING OPENING AS IT IS RECIPROCATED TO DRIVE THE SUBSTANCE FROM THE BARREL, AN ADAPTER CONNECTED TO SAID BARREL AT THE FILLING OPENING, A RELEASE MEMBER ON SAID ADAPTER EXTENDING AWAY FROM SAID FILLING OPENING, SAID ADAPTOR HAVING AT LEAST ONE PASSAGE THEREIN IN COMMUNICATION WITH THE FILLING OPENING A CAN FIXED TO SAID ADAPTER WITH SAID RELEASE MEMBER EXTENDING INTO SAID CAN, A NORMALLY CLOSED VALVE IN SAID CAN, SAID RELEASE MEMBER OPENING SAID VALVE TO PLACE THE INTERIOR OF SAID CAN IN COMMUNICATION WITH SAID BARREL THROUGH SAID FILLING OPENING AND PASSAGE, SAID CAN CONTAINING A SUPPLY OF A VISCOUS SUBSTANCE TO BE DISPENSED AND A COMPLETELY CONTAINED SOURCE OF PRESSURE POSITIONED BENEATH SAID VISCOUS SUBSTANCE, AND A DIAPHRAGM CIRCUMFERENTIALLY ATTACHED TO SAID CAN AND FLEXIBLE THROUGHOUT ITS AREA, SAID DIAPHRAGM BEING POSITIONED BETWEEN SAID VISCOUS SUBSTANCE AND SAID SOURCE OF PRESSURE.