Ointment container with finger actuated piston

Claim 1

A dispenser for creams and the like, the dispenser comprising a hollow body member; a dispensing nozzle at the forward end of the body and communicating with the interior thereof; an opening at the rear end of the body; a dispensing plunger slidably retained in the interior of the body, one face of the plunger being directed forwardly towards the dispensing nozzle and a second opposing face being rearwardly directed and accessible through the open rear end of the hollow body to enable the plunger to be urged towards the nozzle end of the body; an outwardly flaring, resilient collar extending forwardly of and secured to the plunger, the forward edge portion of the flaring collar having an outer periphery pressing against the interior surface of the hollow body, so as to form a sliding, sealing fit therewith, the diameter of the outer periphery of the flaring collar would be greater than that of the internal diameter of the hollow body if the collar were freed from the restraint of the hollow body; said forward edge portion of said flaring collar forming a longitudinally extended surface which is parallel to the interior surface of the hollow body when said plunger is placed in said hollow body member; a skirt portion extending rearwardly from the forward face of the plunger and a plurality of longitudinally extending ribs formed on the outer periphery of the skirt and in contact with the internal surface of the hollow body; whereby the plunger is sealably connected to the interior of the hollow body and is prevented from tilting with respect to the axis of the body when pressure is applied against the underside of the plunger.