Easy clean spray gun
Assignee3M Innovative Properties Company
InventorsStephen Joseph, Russell Blette
Life of this patent
Estimating the term…
Abstract
A spray gun 101 has a spray head 150 connected to a body 102 of the spray gun 101 and a reservoir 156 connected to the spray head 150 for supplying liquid to a spray nozzle 153 of the spray head 150. The spray head 150 is arranged so that liquid from the reservoir 156 is delivered to the spray nozzle 153 without passing through the spray gun body 102 in response to actuation of the spray gun 101 via a trigger 105. The spray head 150 is releasably secured and can be detached from the spray gun body 102 and thrown away after use. The reservoir 156 is mounted on the spray head 150 and can be removed and thrown away with the spray head 150 after use.
Claims20
Liquid spraying apparatus comprising a spray gun including a body provided with a trigger mechanism, a spray head including a body releasably connected at a rear end to the spray gun body and further including a spray nozzle at a front end, a liquid reservoir connected to the spray head body for supplying liquid to the spray nozzle in response to actuation of the trigger mechanism such that liquid from the reservoir is delivered to the spray nozzle through the spray head body without passing through the spray gun body, and air outlets arranged on opposite sides of the spray nozzle to provide air streams directed inwardly into liquid dispensed from the spray nozzle characterised in that the rear end of the spray head body and a front end of the spray gun body are provided with mateable formations that are engageable to secure the spray head body to the spray gun body, the formations being releasable to detach the spray head body from the spray gun body and a needle connected to the trigger mechanism, and the air outlets are provided on the spray head at the front end of the spray head body such that the air outlets and spray nozzle are connected to and disconnected from the spray gun body with the spray head body.
Apparatus according to any one of the preceding claims wherein, the spray head is connectable to a remote reservoir.
Apparatus according to any one of the preceding claims wherein, the reservoir is re-usable.
Apparatus according to any one of the preceding claims wherein, the reservoir is collapsible as liquid is withdrawn in use.
Apparatus according to any one of the preceding claims wherein, the spray nozzle is adapted to atomise the liquid to form a spray.
Apparatus according to any one of the preceding claims wherein, the air outlets producing inwardly directed air streams are provided by a pair of horns projecting forwardly of an outlet for the liquid emerging from the spray nozzle.
Apparatus according to any one of the preceding claims wherein, the needle of the trigger mechanism closes a bore through the spray head to prevent dispense of liquid from the spray nozzle and is retracted to open the bore when the trigger mechanism is actuated to allow dispense of liquid from the spray nozzle.
Apparatus according to any one of the preceding claims wherein, the spray gun is of the gravity feed, pressure feed or suction feed type.
A spray head for use with a spray gun, the spray head having a body with a bore extending from a rear end of the body to an outlet at the front end of the body, the rear end of the body having a formation to connect releasably the spray head to the spray gun, and the body being connectable to a reservoir to supply liquid to the spray head characterised in that the formation is engageable with a mating formation on the spray gun to secure the spray head to the spray gun with a needle connected to a trigger mechanism on the spray gun received in the bore to control dispense of liquid from the outlet, and the body has a pair of air holes at the front end arranged on opposite sides of the outlet to provide air streams directed inwardly into liquid dispensed from the outlet.
Dependencies are inferred from the claim text.