Liquid Control Corporation

William C Schiltz

Frederick D Wasmire

Aaron D Marshall

Jeffery E Brown

John R Scopelite

Brent R Kaiser

A dispensing tool according to the present invention includes a dispensing outlet and at least a first material storage tube having a material storage chamber and an outlet. The tool also includes a drive assembly that is at least partially disposed within the first material storage tube and adapted to dispense material from the first material storage tube through the dispensing outlet. A valve assembly allows the material storage tube to be automatically reloaded when the tool is placed in a reloading station. A clamp may be used to hold the tool at the station.

Dispensing tool and system for reloading the tool

A dispensing tool according to the present invention includes a dispensing outlet and at least a first material storage tube having a material storage chamber and an outlet. The tool also includes a drive assembly that is at least partially disposed within the first material storage tube and adapted to dispense material from the first material storage tube through the dispensing outlet. A valve assembly selectively controls the flow of material from the material storage tube to the dispensing outlet. The valve assembly and the drive assembly are linked such that activation of the drive assembly causes the valve to open allowing material to be dispensed. When the drive assembly is stopped, the valve is automatically closed. Material may be reloaded into the material storage tube through an inlet that is selectively connected to a source of bulk material. The selective connection may be provided by a controllable valve, or a selective connection between a pair of coupling elements. Indicators are provided to tell the user when the tool is full and to turn off the pumps for the bulk material when the connection between the couplings is broken.

System for reloading dispensing tools

An add-on valve assembly for dual-component cartridge has a valve member and a retainer nut which secures the valve member to a dual-component material cartridge. The valve member includes a body having a forwardly extending threaded nozzle and rearwardly extending top and bottom tubes. First and second passageways are formed in the top and bottom tubes, respectively, and extend through the body and nozzle. A valve stem extends generally vertically within the body and is rotatably mounted therein. The valve stem is formed with top and bottom holes which align with the first and second passageways, respectively, when the add-on valve assembly is rotated to an open position and which extend perpendicular to the first and second passageways, respectively, when the add-on valve assembly is rotated to a closed position. The tubes are adapted to extend within respective passageways of the material cartridge and communicate with a pair of chambers formed within the material cartridge. A handle is used to rotate the valve stem between the open position which allows the materials contained within the material cartridge to flow through the first and second passageways and a closed position which prevents the material from flowing through the first and second passageways. A motionless mixing tube may threadably engage the nozzle of the valve member to mix the materials before the materials are dispensed from the material cartridge.

Add-on valve assembly for dual-component cartridge

A cartridge for use in a dispensing gun for simultaneously dispensing and mixing a pair of chemically reactive fluid components maintained in separate chambers in the cartridge. One of the fluid components is contained in an elongated tube formed of a thin flexible film which is placed within a first chamber located either coaxially within an outer annular second chamber containing the other fluid component, or in a side-by-side relationship to the second chamber. Pistons are slidably mounted within the two chambers for simultaneously dispensing the fluid components therefrom when moved forward by plungers of the dispensing gun. In a first embodiment, the front end surface of one of the pistons is recessed from an outer end surface of the other piston to form a void space for collecting the collapsed flexible film therein to permit the outer piston to reach the full extent of its stroke and expel all of the fluid components from both the chambers. In a second embodiment, the first chamber containing the flexible film extends forwardly beyond the second chamber forming a void space beyond an end wall of the second chamber for collecting the collapsed compacted film.

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Canton, OH, United States of America

William C Schiltz