Adjustable stroke liquid dispenser having yieldable aligning means

Claim 1

A LIQUID DISPENSER COMPRISING A BARREL HAVING A DISPENSING TIP AT ONE END AND BEING OPEN AT THE OTHER END, A PISTON RECIPROCABLY MOUNTED IN THE OPEN END OF SAID BARREL, MEANS FOR RESILIENTLY BIASING SAID PISTON OUTWARDLY OF SAID BARREL, GUIDE MEANS FIXED ON SAID BARREL, DEPRESSIBLE MOVABLE MEANS SLIDABLY ENGAGING SAID GUIDE MEANS FOR GUIDED MOVEMENT OF SAID MOVABLE MEANS IN A DETERMINED LONGITUDINAL PATH AND FOR DEPRESSING SAID PISTON WITHIN SAID BARREL, SAID MOVABLE MEANS COMPRISING A PORTION IN OPPOSED RELATION TO THE HEAD OF SAID PISTON, YIELDABLE MEANS BETWEEN THE HEAD OF SAID PISTON AND THE OPPOSED PORTION OF SAID MOVABLE MEANS FOR PERMITTING LIMITED CONTINUED DEPRESSED MOVEMENT OF SAID MOVABLE MEANS AFTER SAID PISTON HAS BEEN DEPRESSED TO A POSITION BRINGING ITS LOWER END INTO ABUTMENT WITH THE LOWER END OF SAID BARREL, AND ADJUSTABLE STOP MEANS ON SAID MOVABLE MEANS FOR ENGAGEMENT WITH SAID GUIDE MEANS FOR LIMITING THE OUTWARD MOVEMENT OF SAID PISTON RELATIVE TO SAID BARREL.