Patent ID: 11858716
Assignee: HILTI AKTIENGESELLSCHAFT
Field: Surface technology, coating (Chemistry)
Classification: CPC B | IPC B

Claim 15:
16. A system for stoning and dispensing a flowable multi-component composition, comprising:
a coaxial cartridge having
a hollow-cylindrical cartridge inner wall,
a cartridge outer wall which is arranged coaxially around said cartridge inner wall and is cylindrical at least on an inside,
an inner chamber for a first component of the multi-component position that is delimited radially by the cartridge inner wall, and
an outer chamber for a second component of the multi-component composition that lies radially between the cartridge inner wall and the cartridge outer wall, and
a cartridge front wall which firmly closes the inner chamber and the outer chamber on an end face of the coaxial cartridge and has a dispensing opening in each of the inner chamber and the outer chamber; and
a support structure which is designed to receive and hold the coaxial cartridge when the multi-component composition is pressed out of said coaxial cartridge, and for this purpose has a side wall which is shaped at least partly like a tube portion and is at least partly closed on a first end face by a support structure front wall designed to support the cartridge front wall;
wherein an inner diameter of the side wall is varied or can be adjusted in an axial and/or radial direction of the support structure in such a way that an annular gap between the cartridge outer wall and the side wall is created, or can be adjusted when the coaxial cartridge is inserted into and removed from the support structure, and a tight fit of the side wall against the cartridge outer wall is created or can be adjusted over the duration of a pressing-out process;
wherein the cartridge outer wall is cylindrical on an outside;
wherein the side wall of the support structure comprises:
a cylindrical outer tube,

a plurality of outer rings which are each mounted in said outer tube in an axially shiftable manner, each tapering in an axial cross section in a trapezoidal or triangular shape toward a cylinder axis and each resting with their broad sides against an inside of the outer tube, and
a plurality of inner rings which are each arranged alternately with the outer rings in the axial direction, partly projecting radially between the outer rings and each widening in an axial cross section in a trapezoidal or triangular shape toward the cylinder axis;
wherein each inner ring has a plurality of radial incisions distributed over its circumference to change its diameter such that said inner ring can be pressed radially inward by axially pushing together adjacent outer rings and, as a result, the inner diameter of said inner ring can be reduced to be equal to the outer diameter of the cartridge outer wall so that said inner ring is pressed against the outer wall of the coaxial cartridge inserted in the support structure; and
wherein the support structure has an axial pressure device on a second end face that is designed for axially pushing the outer rings together toward the support structure front wall.