Abstract: A manually operated, hand-held rechargeable liquid dispensing container device having a non-pressurized, either refillable or non-refillable receptacle or reservoir, is disclosed. The device comprises a relatively reciprocating piston and cylinder defining a pressurizable chamber therebetween which can be charged with liquid from the receptacle or reservoir in the container. The piston or cylinder is reciprocated relative to the other by a charging system connected to either one which compresses a resilient means such as a spring while simultaneously drawing liquid into the chamber through a check valve at the entrance of the liquid chamber. When the chamber is charged with liquid, hydraulic pressure is exerted upon the liquid by the now compressed spring. An improved charging system permits the hydraulic pressure application to be delayed until the check valve closes, insuring a full charge in the pressurizing chamber.

Abstract: The problem of venting the interior of a liquid container utilizing an attached hand-operated, trigger sprayer of the piston or plunger pump type is solved by the provision of a vent passage in the housing of the pump which communicates with the container interior. The piston which is reciprocated in a bore or chamber in the housing has a seal means associated therewith and with the vent passage so that in operation in spraying the container is vented and vacuum development in the container is avoided. In a preferred embodiment said seal means is associated with an entrance or opening to the vent passage so as to provide a seal against liquid leakage from the container when the piston of the pump is in an at rest, non-pumping position and yet permits venting of the container when the piston is in a pumping position.