# US 10,865,779 B2 · Metering pump for a metering device and metering device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,865,779 B2 - Document ID: US10865779B2 - Status: Granted - Kind: B2 - Application number: 16/087,407 - Filed: 2017-03-21 - Published: 2019-04-04 - Granted: 2020-12-15 - Earliest claimed: 2016-03-24 - Assignees: F. Holzer GmbH - Applicants: F. Holzer GmbH - Inventors: Hyeck-Hee Lee; Ute Steinfeld; Markus Mahler; Frank Holzer - Web page: https://patentgrep.com/patent/US10865779B2 ## CPC - F04B 9/14: Pumps characterised by muscle-power operation {(hand-held spraying or dispensing apparatus using pumps or bulbs B05B11/00)} - B05B 11/0032: {Manually actuated means located downstream the discharge nozzle for closing or covering it, e.g. shutters (automatically removed during actuation of a spray pump B05B11/1053)} - B05B 11/1001: {Piston pumps (B05B11/1087, B05B11/1088, B05B11/109 take precedence)} - B05B 11/1047: {the pump being preassembled as an independent unit before being mounted on the container} - B05B 11/105: {Sealing arrangements around pump actuating stem} - F04B 53/12: arranged in or on pistons - F04B 53/121: {the valve being an annular ring surrounding the piston, e.g. an O-ring} - B05B 11/104: {the outlet valve being opened by pressure after a defined accumulation stroke} - B05B 11/1074: {located outside pump chambers} - F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F) - B05B: SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES (spray-mixers with nozzles B01F25/72; processes for applying liquids or other fluent materials to surfaces by spraying B05D) ## Abstract The present invention relates to a metering pump for a metering device, the metering pump being connectable to a storage container. The metering pump thereby comprises a non-return valve which has sealing elements on the base-side, which sealing elements enable internal sealing of the metering pump. In addition, the present invention relates to a metering device in which the metering pump according to the invention is connected to a storage container. ## Claims ### Claim 1 A metering pump for a metering device for metered dispensing of a liquid which is connectable to a storage container, the metering pump comprising: a cylindrical pump body which comprises a first hollow cylindrical pump body portion which is open in the direction of the storage container and a second hollow cylindrical pump body portion which is open in the direction of an actuation body; an inner hollow cylinder which is open at both ends which is mounted on the first pump body portion and is arranged concentrically to the first pump body portion; a plunger which has a thoroughgoing channel which is mounted concentrically in the pump body and moveably in the inner hollow cylinder, and is configured to form a seal with an inner wall of the inner hollow cylinder; an actuation body which is connected to the pump body and mounted moveably relative to the pump body, wherein the actuation body has, on an upper end, an outlet for liquid and a recess which is open in the direction of the second pump body portion, wherein a liner is received inside the recess, wherein the liner has a recess which is open in the direction of the second pump body portion, the liner being disposed to form a fluidic seal relative to the plunger and having a liquid channel through which a liquid can be guided from the recess of the liner to the outlet of the actuation body; and a non-return valve which is mounted moveably and configured to form a fluidic seal relative to the recess of the liner being disposed inside the recess of the liner, wherein the non-return valve, in the unactuated state of the metering pump, fluidically seals the channel of the plunger relative to the recess of the liner and opens the channel of the plunger and also the liquid channel of the liner during actuation of the metering pump, the non-return valve having at least one sealing element which enables fluidic sealing of the non-return valve relative to the plunger, wherein the at least one sealing element is disposed on the base-side on the non-return valve at an angle of 5 degrees to 175 degrees with respect to the base of the non-return valve. ### Claim 2 (depends on 1) The metering pump according to claim 1, wherein the non-return valve is configured to provide the fluidic sealing via the at least one sealing element via a suction force acting on the non-return valve through the channel of the plunger on the non-return valve at the end of the actuation process. ### Claim 3 (depends on 1) The metering pump according to claim 1, wherein the at least one sealing element has an elastic configuration. ### Claim 4 (depends on 1) The metering pump according to claim 1, wherein the at least one sealing element is configured as a sealing lip. ### Claim 5 (depends on 1) The metering pump according to claim 1, wherein, in the unactuated state of the metering pump, the at least one sealing element forms a seal with the wall of the plunger in a form-fit and/or engages in the channel of the plunger. ### Claim 6 (depends on 1) The metering pump according to claim 1, wherein the least one sealing element on the non-return valve is configured in one piece with the non-return valve or is moulded onto the non-return valve. ### Claim 7 (depends on 1) The metering pump according to claim 1, wherein the at least one sealing element has a height in the direction of the plunger of 0.3 to 5.0 mm. ### Claim 8 (depends on 1) The metering pump according to claim 1, wherein the at least one sealing element includes at least one of a thermoplastic material, an elastomeric material, or a thermoplastic elastomer. ### Claim 9 (depends on 1) The metering pump according to claim 1, wherein the non-return valve is retained by an elastic element which exerts a restoring force on the non-return valve in the non-actuated state in a fluidically sealing position relative to the channel of the plunger and also the liquid channel of the liner. ### Claim 10 (depends on 1) The metering pump according to claim 1, wherein a spring element is disposed between actuation body and pump body and exerts a restoring force on the actuation body during and/or after actuation. ### Claim 11 (depends on 1) The metering pump according to claim 1, wherein the first pump body portion has a device for fixing the storage container. ### Claim 12 (depends on 1) The metering pump according to claim 1, wherein a seal is disposed in the region of the first pump body portion which seals the storage container relative to the metering pump. ### Claim 13 (depends on 1) The metering pump according to claim 1, wherein the inner hollow cylinder has a valve portion at the end of the inner hollow cylinder which is open in the direction of the storage container and in which an inlet valve is disposed. ### Claim 14 (depends on 1) The metering pump according to claim 1, wherein a riser pipe is disposed at the end of the inner hollow cylinder which is open in the direction of the storage container. ### Claim 15 (depends on 1) The metering pump according to claim 1, wherein, between the outside of the plunger and the inside of the second pump body portion, a sealing element is disposed on the inside of the second pump body portion for sealing the plunger. ### Claim 16 (depends on 1) A metering device comprising a metering pump according to claim 1 and also a storage container connected to the metering pump. ### Claim 17 (depends on 16) The metering device according to claim 16, wherein the metering device is configured as a non-pressure-equalising metering device. ### Claim 18 (depends on 16) The metering device of claim 16, wherein the metering device is configured as a pressure-equalizing metering device.