Patent US3700174A successfully refreshed from Google Patents.
US3700174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airless spray gun extension
Assignee: Individual
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Filing: 1971-04-05
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Granted: 1972-10-24
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Expires: 1991-04-05
Abstract
Abstract An extension for an airless paint spray gun of the type wherein a flanged spray nozzle or tip is clamped to the gun body by means of a cap having threaded engagement with the spray gun body, the extension being characterized in that a flanged fitting at one end is thus clamped to the spray gun body by means of the cap aforesaid, and in that a fitting at the other end has the spray nozzle clamped thereto by another cap which is the same as the cap which threads onto the spray gun body. Between the fittings aforesaid the extension includes one or more tubular sections which are coupled to each other and to the end fittings to define an extension assembly having a smooth wall bore without pockets or radial enlargements. The extension assembly is further characterized in that the fittings and tubular sections are of thick wall construction so as to substantially avoid radial and lineal expansion even under very high paint spray pressures.
Inventors
- 👤 Louis Beck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:03
CPC Classifications
B; B05; B05B; B05B9/00; B05B9/01; B05B15/00; B05B15/60; B05B15/65; B05B15/656
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
193 words
An extension assembly for an airless paint spray gun having clamping means for securing a spray tip thereto and a valve means for opening and closing a paint supply passage upstream of said spray tip; said assembly comprising a tubular adapter adapted to be clamped by said clamping means to said gun in place of said spray tip; an elongated tubular extension member having a first coupling means at one end to provide a sealed joint with said adapter, and a second coupling means at the other end to seal that end of said member and to provide a seat for said spray tip; and another clamping means for securing said spray tip to said second coupling means whereby, upon opening of said valve means, paint flowing through the passage defined by said adapter, extension member, and second coupling means will be sprayed from said spray tip; said assembly defining a paint flow passage therethrough which is of substantially uniform diameter from said gun to said spray tip and devoid of pockets or radial enlargements whereby, upon closing of said valve means, the discharge of paint from the spray tip is immediately discontinued.
Claim 2
Dependent Claim
193 words
An extension assembly for an airless paint spray gun having clamping means for securing a spray tip thereto and a valve means for opening and closing a paint supply passage upstream of said spray tip; said assembly comprising a tubular adapter adapted to be clamped by said clamping means to said gun in place of said spray tip; an elongated tubular extension member having a first coupling means at one end to provide a sealed joint with said adapter, and a second coupling means at the other end to seal that end of said member and to provide a seat for said spray tip; and another clamping means for securing said spray tip to said second coupling means whereby, upon opening of said valve means, paint flowing through the passage defined by said adapter, extension member, and second coupling means will be sprayed from said spray tip; said assembly defining a paint flow passage therethrough which is of substantially uniform diameter from said gun to said spray tip and devoid of pockets or radial enlargements whereby, upon closing of said valve means, the discharge of paint from the spray tip is immediately discontinued.
Claim 3
Dependent Claim
29 words
The assembly of claim 1 wherein said adapter and said one end of said extension member have complemental tapered seats and have threaded engagement with said first coupling means.
Claim 4
Dependent Claim
29 words
The assembly of claim 1 wherein said other end of said extension member and said second coupling means have threaded engagement with each other and have complemental tapered seats.
Claim 5
Dependent Claim
41 words
The assembly of claim 1 wherein said clamping means and another clamping means comprise clamping nuts threaded onto said gun and second coupling means respectively; and wherein said adapter and spray tip have flanges by which they are clamped as aforesaid.
Claim 6
Dependent Claim
30 words
The assembly of claim 1 wherein said extension member has concave and convex tapered seats at its respective ends to engage complemental seats of said adapter and second coupling means.
Claim 7
Dependent Claim
51 words
The assembly of claim 1 wherein said adapter and extension member have a relatively thick wall so as to be substantially rigid against lengthwise and diametral expansion under the influence of paint pressures exceeding several hundred p.s.i. thus further to eliminate after-dribble at the time of closing of said valve means.
Claim 8
Dependent Claim
27 words
The assembly of claim 1 wherein said extension member comprises at least two sections coupled together by another first coupling means to form a sealed joint therebetween.
Claim 9
Dependent Claim
43 words
The assembly of claim 7 wherein said extension member sections, said adapter, and said second coupling means have complemental tapered seats; and wherein said sections have threaded engagement with said first coupling means, said another first coupling means, and said second coupling means.
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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |