US 12,472,520 B2
Continuous spray trigger dispenser
Simon Christopher Knight, Bridgend Mid Glamorgan (GB)
Assigned to RIEKE PACKAGING SYSTEMS LIMITED, Leicestershire (GB)
Appl. No. 17/780,191
Filed by RIEKE PACKAGING SYSTEMS LIMITED, Leicester (GB)
PCT Filed Nov. 27, 2020, PCT No. PCT/EP2020/083637
§ 371(c)(1), (2) Date May 26, 2022,
PCT Pub. No. WO2021/105367, PCT Pub. Date Jun. 3, 2021.
Claims priority of provisional application 62/941,005, filed on Nov. 27, 2019.
Prior Publication US 2022/0410193 A1, Dec. 29, 2022
Int. Cl. B05B 11/00 (2023.01); B05B 11/10 (2023.01)
CPC B05B 11/1011 (2023.01) 19 Claims
OG exemplary drawing
 
1. A continuous spraying trigger dispenser having no metallic components, the dispenser comprising:
a pump body defining a fluid flow path passing completely through the pump body, the pump body having a closure cap, a dispensing nozzle, and a pump chamber accommodating a movable piston;
a reservoir diaphragm attached to the pump body and positioned above the pump chamber, the reservoir diaphragm having an inlet to receive fluid from the pump chamber, an outlet connected to the dispensing nozzle, and a sidewall connected to at least one expandable, resilient panel that moves in response to fluid accumulation within the reservoir diaphragm and biasing force exerted by a plastic biasing member on an outer surface of the resilient panel so as to compress the resilient panel; and
a trigger pivotally connected to the pump body proximate to the pump chamber, the trigger having a driving member urging the piston to move within the pump chamber, thereby varying volume in a portion of the pump chamber connected to the fluid flow path so as to urge fluid along the fluid flow path;
whereby fluid accumulating within the reservoir diaphragm is dispensable continuously according to at least one of the following: (i) for a period of time exceeding that required to actuate the trigger; and (ii) so that a maximum volume of fluid received within the portion of the pump chamber connected to the fluid flow path is less than a volume of the reservoir diaphragm when the resilient panel is at least partially expanded.