US 12,240,146 B2
Nozzle for dispensing concrete, mortar or the like
Klaus Kampitsch, Kamering (AT); and David Kampitsch, Paternion (AT)
Assigned to MAI INTERNATIONAL GMBH, Feistritz/Drau (AT)
Appl. No. 18/011,603
Filed by MAI INTERNATIONAL GMBH, Feistritz/Drau (AT)
PCT Filed Jun. 1, 2021, PCT No. PCT/EP2021/064593
§ 371(c)(1), (2) Date Dec. 20, 2022,
PCT Pub. No. WO2021/259595, PCT Pub. Date Dec. 30, 2021.
Claims priority of application No. 102020003760.7 (DE), filed on Jun. 23, 2020.
Prior Publication US 2023/0302680 A1, Sep. 28, 2023
Int. Cl. B28C 5/08 (2006.01); B28C 5/16 (2006.01)
CPC B28C 5/0862 (2013.01) [B28C 5/0818 (2013.01); B28C 5/16 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A dispensing nozzle for concrete, mortar or the like, comprising:
a housing and a mixing chamber arranged therein, the mixing chamber delimited by a circumferential wall, and the mixing chamber extending along a longitudinal axis at least between a supply opening and an outlet opening,
an actively driveable mixing device arranged in the mixing chamber, and
a nozzle element with an exit opening directly or indirectly flow-connected to the outlet opening of the mixing chamber, and
at least one cavity extending axially and in a circumferential direction around, and in contact with, the circumferential wall of the mixing chamber, the at least one cavity at least substantially surrounding the mixing chamber in the circumferential direction,
wherein the circumferential wall of the mixing chamber comprises an elastic material configured to deform dynamically into the at least one cavity during operation of the dispensing nozzle.