Spray gun
OwnerRoland C. Jubinvilleinventor
Life of this patent
Estimating the term…
Abstract
A spray gun is disclosed for simultaneously spraying a liquid and a particulate material, for example, in applying decorative facings to walls and like surfaces. The gun is designed to spray a central stream of particulate material surrounded by a liquid stream. The gun includes a first air passageway into which the particulate material is introduced and a second air passageway into which liquid can be introduced under pressure. An air flow control valve is disposed in a first air passageway and is coupled to a trigger so that the valve is progressively opened as the trigger is squeezed. A flow control valve is also provided for the liquid and is coupled to the trigger so as to be progressively opened as the trigger is squeezed.
Claims8
A spray gun adapted to simultaneously spray a liquid and a particulate material, the gun comprising:
- a body defining a handle section;
- a nozzle assembly coupled to said body and having:
- a central opening for the discharge of a stream of said particulate material;
- and liquid discharge means disposed around said opening for the discharge of liquid around said stream of particulate material;
- said body including:
- a first air passageway having an inlet end, and an outlet end communicating with said central opening of the nozzle assembly;
- means at said inlet end for coupling a source of pressurized air to said first air passageway;
- a second air passageway having an inlet end, and an outlet end coupled to said liquid discharge means of the nozzle assembly;
- means at said inlet end for coupling a source of pressurized air to said second air passageway;
- first inlet means disposed intermediate said inlet and outlet of said first air passageway and through which said particulate material can be introduced into said first air passageway;
- second inlet means disposed intermediate said inlet and outlet of said second air passageway and through which said liquid can be introduced under pressure into said second air passageway;
- and means in said first inlet means for controlling the introduction of said particulate material into said first air passageway;
- a trigger mounted on said body adjacent said handle section for progressive movement with respect to said body from a rest position, said trigger being positioned so that it can be squeezed towards said handle section by a person holding the gun by said section;
- spring means normally biassing said trigger to its said rest position;
- and,
- an air flow control valve disposed in said first air passageway upstream of said first inlet means and coupled to said trigger so that the valve is progressively opened as the trigger is squeezed;
- said second inlet means including a liquid flow control valve coupled to said trigger so as to be progressively opened as the trigger is squeezed;
- whereby the volume of liquid and the amount of particulate material issuing from the gun can be simultaneously varied in use by operation of the trigger.
Dependencies are inferred from the claim text.