US 11,794,202 B2
Washable, modular pump
Thomas P. Kasting, Fort Wayne, MI (US); and Dale W. Taylor, Hamilton, IN (US)
Assigned to RIEKE LLC, Auburn, IN (US)
Appl. No. 17/621,343
Filed by RIEKE LLC, Auburn, IN (US)
PCT Filed Jun. 24, 2020, PCT No. PCT/US2020/039278
§ 371(c)(1), (2) Date Dec. 21, 2021,
PCT Pub. No. WO2020/263920, PCT Pub. Date Dec. 30, 2020.
Claims priority of provisional application 62/865,520, filed on Jun. 24, 2019.
Prior Publication US 2022/0355322 A1, Nov. 10, 2022
Int. Cl. B05B 11/00 (2023.01); B05B 11/10 (2023.01); B05B 15/50 (2018.01)
CPC B05B 11/1043 (2023.01) [B05B 11/1067 (2023.01); B05B 15/50 (2018.02)] 18 Claims
OG exemplary drawing
 
1. A washable pump dispenser comprising:
a dispensing tube including a plunger stem at one end of the dispensing tube;
a closure having a cylindrical body coaxially receiving the plunger stem so as to accommodate reciprocal motion of the dispensing tube;
a housing having an inlet valve member positioned proximate to an inlet end of the housing, said housing coupled to the closure;
a piston having a central aperture contained within the housing wherein, in response to force applied by the plunger stem, the piston is movable toward the inlet end so as to vary a sealed volume of a pump chamber defined by the housing, the inlet valve member, the piston, and the central aperture;
a insert having a tubular body with a web extending radially inward, said insert: detachably coupled to the piston or detachably held proximate to a terminal end of the piston;
an outlet valve member held between the central aperture of the piston and the web of the insert so that, when the insert is detached from the piston or the terminal end, the outlet valve member may be removed and cleaned;
a biasing member urging the piston away from the first end; and
wherein the closure includes a chaplet positioned above and partially within the cylindrical body, said chaplet attached to the housing and forming a stopper to restrict the upward movement of the piston by abutting a top edge of an outlet valve insert formed on the piston.