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US 4,676,657 AGranted
Cartridge for the dispensing of two component systems from caulking guns
OwnerAlexander Botrieinventor
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OwnerAlexander Botrieinventor
Estimating the term…
A cartridge assembly for a caulking gun or similar dispenser contains two or more components to be mixed upon operation of the gun. One component is stored within an inner tubular container with flexible walls, which walls are sustained against collapse by a light gauge spiral spring extending between the nozzle end and the plunger end of the cartridge. The cartridge may have a rigid cylindrical outer tube within which the second component is retained by a plunger, or a flexible tubular outer container for the second component, again supported against collapse by a spring. A passive mixer unit is provided at the nozzle end of the assembly either inside or outside the body. The mixer unit is preferably cylindrical, defining internally a double spiral mixing passage containing passive mixer elements.
A cartridge assembly for use in a caulking gun and comprising a tubular cylindrical body having opposite ends exit nozzle means at one opposite end of the body, and end wall at the other opposite end of the body engageable by a plunger movable within the gun to expel contents of the body through said exit nozzle means, an inner collapsible container storing a first component of a two component mix and extending longitudinally of the body, and a second component within the body surrounding the collapsible container, wherein the inner collapsible container is of tubular cylindrical form with walls of thin flexible film, and a coil compression spring of light gauge wire and tubular cylindrical form resides within the collapsible container, said spring having a diameter substantially equal to that of the container and free length greater than the distance from said exit nozzle means to said opposite end, whereby to support said container and press it towards said opposite ends, and rigid means are provided defining an opening from said container, said rigid means supporting the end of the container spaced from said exit nozzle and from the end of said body over the full diameter of the container to define a combining zone for said first and second components and said rigid means also sustaining the reaction from said container as its contents are extruded through said opening into said combining zone.
A cartridge assembly for use in caulking guns, comprising a cylindrical body having plural longitudinally extending conjointly collapsible compartments for different fluid components of a multiple component mix, said body being engageable at one end by a plunger to expel the different components in predetermined proportions from a nozzle at the other end of the body, the improvement wherein said other end of the body is a cylindrical passive mixer unit, said mixer unit having an axial entrance at an inner end for receiving said components, and an axial exit to said nozzle at an outer end, an extended convoluted passage being defined within the mixer unit extending between the axial entrance and the axial nozzle, containing a pluality of longitudinally distributed passive mixer elements, said mixer unit further defining an axial passage between said axial entrance and said axial actuator means having an outer end accessible from said nozzle, a central portion passing through said axial passage and blocking passage of the components therethrough, and an inner end movable by manipulation of aid outer end to disable obstructions blocking extrusion of said components into said axial entrance.
In a cartridge assembly for use in caulking guns, comprising a cylindrical body having plural longitudinally extending conjointly collapsible compartments for different fluid components of a multiple component mix, said body being engageable at one end and by a plunger to expel the different components in predetermined proportions from a nozzle at the other end of the body, the improvement wherein said other end of the body is a cylindrical passive mixer unit, said mixer unit having an axial entrance at an inner end for receiving said components, and an axial exit to said nozzle at an outer end, an extended convoluted passage being defined within the mixer unit extending between the axial entrance and the axial nozzle, and containing a plurality of longitudinally distributed passive mixer elements.
Dependencies are inferred from the claim text.