US3777981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spray apparatus and method
Assignee: Ransburg Corp
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Filing: 1971-11-18
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Granted: 1973-12-11
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Expires: 1991-11-18
Abstract
Abstract Powder color change is accomplished easily and conveniently by providing a spray device having a channel or groove in its side and traversing its length in combination with one of a plurality of elongated, flexible powder feed tubes. The channel is formed from rigid material. One end of each of the feed tubes is connected to its cooperatively associated powder pump immersed in a powder reservoir. Each feed tube is adapted to be snapped into or out of the channel or groove of the spray device. The feed tube is retained in the channel in such a manner as to prevent harmful movement thereof with respect to the channel and other components of the device during the spraying operation. However, the feed tube is retained in the channel in such a manner as to permit the user to remove the tube from the channel without employing undue force or special tools. The feed tube selected to be snap fitted into the channel of the spray device dictates the color of the powder to be sprayed upon activation of the spray device. The system employing the spray device includes control means for switching from one powder reservoir to another powder reservoir upon removal of one feed tube from the spray device and insertion of another feed tube into the spray device.
Inventors
- 👤 R Probst
- 👤 K Pollard
- 👤 F Stockton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:32
CPC Classifications
B; B05; B05B; B05B5/00; B05B5/025; B05B5/03; B05B5/032; B05B12/00; B05B12/14; B05B5/16; B05B5/1683
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
134 words
A powder spray device for easily and conveniently accomplishing switching from spraying one type of coating material to spraying coating material of another type without harmfully contaminating the subsequently sprayed coating material with previously sprayed coating material, the spray device including means forming a barrel, and a handle and carrying a spray forming nozzle, a channel provided in the side of the barrel traversing the length of the barrel and communicating with the spray-forming nozzle, and an elongated feed tube adapted to have one end connected to a powder reservoir and to fit in the channel, the means being shaped to retain the feed tube in the channel and in sealed engagement with the spray-forming nozzle so as to deliver powder to the nozzle and to prevent harmful movement thereof during the spraying operation.
Claim 2
Dependent Claim
134 words
A powder spray device for easily and conveniently accomplishing switching from spraying one type of coating material to spraying coating material of another type without harmfully contaminating the subsequently sprayed coating material with previously sprayed coating material, the spray device including means forming a barrel, and a handle and carrying a spray forming nozzle, a channel provided in the side of the barrel traversing the length of the barrel and communicating with the spray-forming nozzle, and an elongated feed tube adapted to have one end connected to a powder reservoir and to fit in the channel, the means being shaped to retain the feed tube in the channel and in sealed engagement with the spray-forming nozzle so as to deliver powder to the nozzle and to prevent harmful movement thereof during the spraying operation.
Claim 3
Dependent Claim
20 words
The spray device of claim 1, wherein the channel is curved within the barrel and handle of the spray device.
Claim 4
Dependent Claim
45 words
The spray device of claim 2, wherein the forward end of the feed tube is retained at the forward end of the spray device by the spray-forming nozzle and at the handle by means of the elongated feed tube adapted to cooperate with the handle.
Claim 5
Dependent Claim
32 words
The spray device of claim 1 in combination with means for selecting one coating material reservoir from several coating reservoirs from which coating material is withdrawn and supplied to the feed tube.
Claim 6
Dependent Claim
79 words
The combination of claim 4, wherein the means for selecting the coating material includes a plurality of feed tubes, a different feed tube cooperatively associated with each reservoir and means for retaining unused feed tubes to deactivate the coating material reservoirs cooperatively associated with the unused feed tubes, removing the feed tube from the retaining means activating the coating material reservoir cooperatively associated therewith so that coating material can be withdrawn from that reservoir and delivered to the gun.
Claim 7
Dependent Claim
154 words
A powder spray gun for easily and conveniently accomplishing switching from spraying powder of one color to spraying powder of another color without harmfully contaminating the subsequently sprayed powder with previously spray powder, the spray gun comprising a barrel and a handle projecting at an angle from the barrel, a channel provided in the side of the barrel and handle and traversing the length of each, a spray-forming nozzle carried at the front of the barrel and an elongated feed tube adapted to have one end connected to a powder reservoir, the feed tube capable of being inserted into the channel and retained in the channel at the front of the gun by the spraying nozzle and at the rear of the gun by means on the tube cooperating with the handle so as to prevent harmful movement thereof, the elongated tube being in communication with the spray-forming nozzle when retained in the channel.
Claim 8
Dependent Claim
154 words
A powder spray gun for easily and conveniently accomplishing switching from spraying powder of one color to spraying powder of another color without harmfully contaminating the subsequently sprayed powder with previously spray powder, the spray gun comprising a barrel and a handle projecting at an angle from the barrel, a channel provided in the side of the barrel and handle and traversing the length of each, a spray-forming nozzle carried at the front of the barrel and an elongated feed tube adapted to have one end connected to a powder reservoir, the feed tube capable of being inserted into the channel and retained in the channel at the front of the gun by the spraying nozzle and at the rear of the gun by means on the tube cooperating with the handle so as to prevent harmful movement thereof, the elongated tube being in communication with the spray-forming nozzle when retained in the channel.
Claim 9
Dependent Claim
25 words
The spray gun of claim 8, wherein the gun includes tab means in the barrel and the handle for retaining the tube in the channel.
Claim 10
Dependent Claim
34 words
The spray device of claim 6, in combination with means for selecting one powder from several powders and for supplying the selected powder to the feed tube in the channel of the spray gun.
Claim 11
Dependent Claim
67 words
The combination of claim 8, wherein the means for selecting the powder includes at least two feed tubes and two powder reservoirs, and means for retaining the unused feed tube to deactivate the reservoir connected to the unused feed tube, removing a feed tube from the retaining means activating the reservoir connected thereto so that powder can be withdrawn from that reservoir and delivered to the gun.
Claim 12
Dependent Claim
102 words
In a method for easily and conveniently accomplishing switching from spraying powder of one type to powder of another type without harmfully contaminating the subsequently sprayed powder with previously sprayed powder, the steps including providing a spray device having a barrel, carrying spray-forming nozzle, and including a channel traversing the length of the barrel and communicating with a spray-forming nozzle, inserting and removing feed tubes having one end connected to powder reservoirs into the channel and in sealed communication with the spray-forming nozzle with a snap-like action, and spraying coating material withdrawn from the reservoir from the spray-forming nozzle of the device.
Claim 13
Dependent Claim
102 words
In a method for easily and conveniently accomplishing switching from spraying powder of one type to powder of another type without harmfully contaminating the subsequently sprayed powder with previously sprayed powder, the steps including providing a spray device having a barrel, carrying spray-forming nozzle, and including a channel traversing the length of the barrel and communicating with a spray-forming nozzle, inserting and removing feed tubes having one end connected to powder reservoirs into the channel and in sealed communication with the spray-forming nozzle with a snap-like action, and spraying coating material withdrawn from the reservoir from the spray-forming nozzle of the device.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |