US3716191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid spraying guns
Assignee: Haden Drysys International Ltd
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Filing: 1970-08-28
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Granted: 1973-02-13
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Expires: 1990-08-28
Abstract
Abstract A spray gun for spraying articles such as automobile bodies fed in succession is automatically controlled by a selectively operable valve having a plurality of liquid delivery ports and gun purging ports. The liquid delivery ports are connected one each to sources of liquid of different colors and the gun purging ports to a source of compressed gas and a source of solvent. A single hollow arm connected by a feed hose to the gun is movable relative to the ports of the valve under control of a program unit and a timer in a manner such that when the program unit signals the requirement for a change of color the timer causes the hollow arm to be moved from the current liquid delivery port first to the compressed gas gun purging port so that a slug of air is delivered into the hollow arm and then to the solvent gun purging port so that solvent is delivered to complete the emission of colored liquid from the arm, the feed hose, and the gun and to effect cleansing of these parts preparatory to the delivery of liquid of a different color. The compressed gas and solvent is fed at a pressure sufficient to maintain the feeding pressure of liquid remaining in the arm, the feed hose, and the gun until the liquid is emitted from the gun.
Inventors
- 👤 H Knight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:48
CPC Classifications
B; B05; B05B; B05B12/00; B05B12/14; B05B12/149; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4259; Y10T137/8593; Y10T137/86389; Y10T137/86445; Y10T137/86461; Y10T137/86493; Y10T137/86501
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
206 words
Apparatus for controlling the operation of a spray gun, said apparatus comprising valve means including a plurality of liquid delivery ports each connectable with a different source of liquid to be sprayed by the gun on to an article and first and second gun purging ports each connectable with a source of purging fluid, feed means cooperable with and movable relative to said ports and connectable with the spray gun by a feed hose, selector means coupled to the feed means and operable selectively to position the feed means for cooperation with any one of the ports, purging fluid delivery control means connected with each of the first and second purging ports and operable to deliver air under pressure as a purging fluid to the first gun purging port and a liquid purging fluid to the second gun purging port, a program unit coupled to the selector means and operable to effect operation thereof, and timing means coupled to the program unit and said purging fluid delivery control means and operable to determine the sequence and duration of cooperation of the feed means with one of said liquid delivery ports and the gun purging ports and to control operation of the purging fluid delivery control means.
Claim 2
Dependent Claim
206 words
Apparatus for controlling the operation of a spray gun, said apparatus comprising valve means including a plurality of liquid delivery ports each connectable with a different source of liquid to be sprayed by the gun on to an article and first and second gun purging ports each connectable with a source of purging fluid, feed means cooperable with and movable relative to said ports and connectable with the spray gun by a feed hose, selector means coupled to the feed means and operable selectively to position the feed means for cooperation with any one of the ports, purging fluid delivery control means connected with each of the first and second purging ports and operable to deliver air under pressure as a purging fluid to the first gun purging port and a liquid purging fluid to the second gun purging port, a program unit coupled to the selector means and operable to effect operation thereof, and timing means coupled to the program unit and said purging fluid delivery control means and operable to determine the sequence and duration of cooperation of the feed means with one of said liquid delivery ports and the gun purging ports and to control operation of the purging fluid delivery control means.
Claim 3
Dependent Claim
206 words
Apparatus for controlling the operation of a spray gun, said apparatus comprising valve means including a plurality of liquid delivery ports each connectable with a different source of liquid to be sprayed by the gun on to an article and first and second gun purging ports each connectable with a source of purging fluid, feed means cooperable with and movable relative to said ports and connectable with the spray gun by a feed hose, selector means coupled to the feed means and operable selectively to position the feed means for cooperation with any one of the ports, purging fluid delivery control means connected with each of the first and second purging ports and operable to deliver air under pressure as a purging fluid to the first gun purging port and a liquid purging fluid to the second gun purging port, a program unit coupled to the selector means and operable to effect operation thereof, and timing means coupled to the program unit and said purging fluid delivery control means and operable to determine the sequence and duration of cooperation of the feed means with one of said liquid delivery ports and the gun purging ports and to control operation of the purging fluid delivery control means.
Claim 4
Dependent Claim
206 words
Apparatus for controlling the operation of a spray gun, said apparatus comprising valve means including a plurality of liquid delivery ports each connectable with a different source of liquid to be sprayed by the gun on to an article and first and second gun purging ports each connectable with a source of purging fluid, feed means cooperable with and movable relative to said ports and connectable with the spray gun by a feed hose, selector means coupled to the feed means and operable selectively to position the feed means for cooperation with any one of the ports, purging fluid delivery control means connected with each of the first and second purging ports and operable to deliver air under pressure as a purging fluid to the first gun purging port and a liquid purging fluid to the second gun purging port, a program unit coupled to the selector means and operable to effect operation thereof, and timing means coupled to the program unit and said purging fluid delivery control means and operable to determine the sequence and duration of cooperation of the feed means with one of said liquid delivery ports and the gun purging ports and to control operation of the purging fluid delivery control means.
Claim 5
Dependent Claim
84 words
Apparatus according to claim 1, wherein the purging fluid delivery control means includes valves respectively to control the delivery of purging fluid to the first and second gun purging ports and operable under control of the timing unit to permit the flow of purging fluid to the purging ports at a pressure sufficient to maintain the feeding pressure of liquid remaining in the feed means, the feed hose, and the gun on movement of the feed means from cooperation with a liquid delivery port.
Claim 6
Dependent Claim
69 words
Apparatus according to claim 1, wherein the selector means comprises a reciprocable rack coupled to the feed means and slidable lengthwise in a stop block including a plurality of stop valves each provided with a stop member, said valves being operable independently under control of the program unit selectively to interpose the stop members into the path of the rack and to withdraw the stop members from said path.
Claim 7
Dependent Claim
122 words
Apparatus according to claim 3, wherein the valve means comprises a stationary member in which the liquid ports and the gun purging ports are spaced apart around a circle, and a valve plate rotatable relative to said stationary member and having a single opening therethrough for selective cooperation with one only of said ports, and wherein the feed means comprises a tubular arm rotatable relative to the stationary member about an axis coincident with the center of said circle, one end of the arm communicating with the opening in the valve plate and the opposite end of the arm communicating with the feed hose and being connected through a pinion with said rack to permit rotation of the arm by the rack.
Claim 8
Dependent Claim
62 words
Apparatus according to claim 4, including an annular sealing ring associated with the stationary member, said sealing ring being made of synthetic plastics material and interposed between the valve plate and said member and being provided with holes extending therethrough and coincident with said ports and with radially extending grooves located between the holes to increase the flexibility of the sealing ring.
Claim 9
Dependent Claim
69 words
Apparatus according to claim 2, wherein the selector means comprises a reciprocable rack coupled to the feed means and slidable lengthwise in a stop block including a plurality of stop valves each provided with a stop member, said valves being operable independently under control of the program unit selectively to interpose the stop members into the path of the rack and to withdraw the stop members from said path.
Claim 10
Dependent Claim
22 words
Apparatus according to claim 6, wherein the rack is operable by the piston of a fluid-operated double-acting cylinder through said solenoid valve.
Claim 11
Dependent Claim
122 words
Apparatus according to claim 7, wherein the valve means comprises a stationary member in which the liquid ports and the gun purging ports are spaced apart around a circle, and a valve plate rotatable relative to said stationary member and having a single opening therethrough for selective cooperation with one only of said ports, and wherein the feed means comprises a tubular arm rotatable relative to the stationary member about an axis coincident with the center of said circle, one end of the arm communicating with the opening in the valve plate and the opposite end of the arm communicating with the feed hose and being connected through a pinion with said rack to permit rotation of the arm by the rack.
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) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |