Dispensing – With discharge assistant – With material supply container and discharge assistant with...
Patent
1997-07-02
1999-03-23
Jacyna, J. Casimer
Dispensing
With discharge assistant
With material supply container and discharge assistant with...
222335, 222340, 239333, B05B 1100
Patent
active
058848207
DESCRIPTION:
BRIEF SUMMARY
This invention relates to dispensers for liquid products, of the kind which have a trigger operable to drive a piston along a pump chamber against the action of a spring, and so to force liquid product under pressure from the pump chamber and through a dispensing orifice in a nozzle. Such dispensers are frequently referred to as "trigger pump dispensers", an appellation which is hereinafter used for brevity. It will be understood that the dispenser has one-way valves associated with its inlet and outlet flow paths, for controlling product flow from and to the pump chamber.
A known desideratum of trigger pump dispensers is that they should be made wholly of thermoplastics resin materials for easy recyclability after use. This invention is concerned to provide such a trigger pump dispenser which is easy to assemble, reliable in use, and has a small number of parts. To this end the invention provides a trigger pump dispenser having several aspects which may be used individually or in combination.
Accordingly, from a first of its aspects the invention provides a trigger pump dispenser, characterised in that the spring for the trigger is generally L-shaped in side elevation, having upper and lower arms joined at an elbow from which they each extend generally forwardly of the pump dispenser, the lower arm being attached to the dispenser body below the pump chamber, and the upper arm being flexible and resilient, cantilevered from the lower arm at the elbow, and movably engaged at its free end with the trigger.
From a second of its aspects the invention provides an all plastic manually operable trigger pump dispenser for use and incorporation on a container for liquid to be dispensed, comprising in combination: adapted to assume a retracted position at which the chamber assumes a first position of large volume and an inserted position at which the chamber assumes a second position of lesser volume; be digitally moved from a starting position at which the piston is in the retracted position and a depressed position at which the piston is in the inserted position and moved back to the starting position; towards its retracted position; communication with the pump chamber; is in the pump chamber and the piston is moved from the retracted position to the inserted position as the pump chamber decreases in volume, the inlet valve being adapted to open the inlet port when the liquid to be dispensed is drawn into the pump chamber through the inlet port as the pump chamber volume increases when the piston is moved from the inserted position to the retracted position; decreases in volume as the liquid therein is dispensed through the outlet port and adapted to close when the pump chamber increases in volume; dispensed out from the outlet port and eventually into a selected discharge pattern; passage means into the selected discharge pattern; elevation, having one arm anchored to the body, and another arm flexible, resilient and cantilevered from the first arm and having a free end pivotally coupled with the trigger. operable trigger pump dispenser for use and incorporation on a container for liquid to be dispensed comprising in combination: adapted to assume a retracted position at which the chamber assumes a first position of large volume and an inserted position at which the chamber assumes a second position of lesser volume, the piston having a distal end and a proximal end; be digitally moved from a starting position at which the piston is in the retracted position and a depressed position at which the piston is in the inserted position and moved back to the starting position; towards its retracted position; communication with the pump chamber; is in the pump chamber and the piston is moved from the retracted position to the inserted position as the pump chamber decreases in volume, the inlet valve being adapted to open the inlet port when the liquid to be dispensed is drawn into the pump chamber through the inlet port as the pump chamber volume increases when the piston is moved from the inserted position to the retrac
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Natersky Klaus
Thanisch Klaus
Jacyna J. Casimer
Spraysol GmbH
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