US 12,251,721 B2
Pump for dispensing a fluid
Sabine Goettke, Lohne (DE)
Assigned to RPC Bramlage GmbH, Lohne (DE)
Appl. No. 17/927,959
Filed by RPC Bramlage GmbH, Lohne (DE)
PCT Filed May 28, 2021, PCT No. PCT/EP2021/064424
§ 371(c)(1), (2) Date Nov. 28, 2022,
PCT Pub. No. WO2021/239985, PCT Pub. Date Dec. 2, 2021.
Claims priority of application No. 2008086 (GB), filed on May 29, 2020; and application No. 2019553 (GB), filed on Dec. 11, 2020.
Prior Publication US 2023/0249206 A1, Aug. 10, 2023
Int. Cl. B05B 11/00 (2023.01); B05B 11/10 (2023.01); B05B 15/656 (2018.01); F04B 19/04 (2006.01); F04B 53/14 (2006.01)
CPC B05B 11/1077 (2023.01) [B05B 11/0044 (2018.08); B05B 11/0089 (2013.01); B05B 11/1023 (2023.01); B05B 11/1047 (2023.01); B05B 11/1053 (2023.01); B05B 11/1059 (2023.01); B05B 11/1069 (2023.01); B05B 11/1074 (2023.01); B05B 11/1094 (2023.01); B05B 15/656 (2018.02); F04B 19/04 (2013.01); F04B 53/14 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A pump (1) for dispensing a fluid (11), comprising;
a pump head (2),
a piston (15) with a piston body (14),
a pump chamber (13) provided by a pump chamber part (5),
an inlet valve (12) and an outlet valve (16),
wherein the piston body (14) is moveable relative to the pump chamber (13),
wherein the piston body (14) is tube-like, providing a channel for delivering the fluid (11) from the pump chamber (13) via the outlet valve (16) to an outlet opening (8) in the pump head (2),
wherein the outlet valve (16) is provided by a valve body cooperating with a sealing rim,
wherein the sealing rim is given by an opening in an outlet channel (10) of the pump head (2), leading to the outlet opening (8),
wherein the piston body (14) is combined with the valve body for movement of the piston body (14) with the valve body,
wherein the piston body (14) has a sealing lip for a sealing engagement with an inner surface of the pump chamber body,
wherein the pump head (2) is moveable relatively to the piston body (14) providing an opening stroke for the outlet valve (16),
wherein at once the valve body moves axially in the opposite direction into a part of the outlet channel being above the valve body,
wherein the outlet valve consists of a disc-like valve part (26) with an outer upward protruding circumferential rim part (27), the outlet valve cooperating with the sealing rim (30) provided for in the pump head (2) given by an opening (31) in an outlet channel (10), extending within, and at least in an opening position, through a short tube-like portion,
wherein the disc-like valve part (26) lies on the sealing rim (30) by means of an edge (32) designed at an outer surface of the disc-like valve part (26), and
wherein the outer surface is designed convex in a cross section, providing the edge (32), or due to compression of the disc-like valve part (26), being in this case elastic, a comparatively broad sealing contact is obtained by surfaces lying on each other on a rather cylindrical area.