| 摘要 |
<p>The spray gun has an air cap (22) that generates a spray mixture of liquid and air. The air cap (22) includes a fluid valve (14) for controlling the delivery of liquid and a separate air valve (12) in the body of the spray gun is provided for controlling delivery of air. A control mechanism assembly (16, 18, 56) for both of the valves (12, 14) is located axially within a central bore (48) extending substantially the length of the spray gun. The control mechanism is actuated by means of a cam and follower arrangement with the cam surface (11) provided on the rear of a manually operable trigger (10). The fluid valve (14) is fully adjustable separately from the air valve (12) but the control mechanism assembly includes a common control member (18) that is in engagement with the control mechanism and operates both the fluid and air valves. The arrangement of the air valve (12) enables the surface area of the air passages (34, 70) leading from an ionising source (72) to the air cap (22) to be minimised and unnecessary restrictions to be omitted so that ion recombination losses within the spray gun are significantly reduced.</p> |
