Patent US3787056A successfully refreshed from Google Patents.
Patent US3622078A successfully refreshed from Google Patents.
US3622078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spraying device for pastelike material with shutoff valve means for the material
Assignee: Bergische Metallwarenfabrik Dillenberg & Co Kg
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Filing: 1970-05-22
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Granted: 1971-11-23
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Expires: 1990-05-22
Abstract
Abstract A spray device or gun utilizing compressed air as the carrier for the material to be sprayed, comprising a body having an air passage system connecting the air supply to the air nozzle, and a material passage system connecting the supply of the material to the material nozzle. A pressure-reducing valve is interposed in the air passage system to reduce the spraying air pressure. A shutoff valve is located in the material passage system to stop or permit flow of material. The shutoff valve is provided with pressure-responsive actuating means, the means being connected to the air passage system whereby when air pressure is present the shutoff valve is kept in its open position. The passages of the material passage system are so arranged that the shutoff valve first closes the passage leading from to the material nozzle means, and thereafter closes the passages leading from the material supply. This closure arrangement maintains the material nozzle and its passage clear from drippings upon air shut off.
Inventors
- 👤 Gunter Gronert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:00
CPC Classifications
B; B05; B05B; B05B12/00; B05B12/004; B05B12/006; B05B12/008; B24; B24B; B24B57/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
228 words
A spraying device comprising a body, an air fitting secured to said body and adapted to be connected to a compressed air supply, a spray material fitting secured to said body and adapted to be connected to a spray material supply, an air discharge nozzle means, a spray material discharge nozzle means cooperating therewith, first passage system interconnecting said air fitting and said air nozzle means, a pressure-reducing valve in said first passage system to reduce the pressure of the air flowing from the fitting to the air nozzle, a second passage system interconnecting said spray material fitting and the maTerial nozzle, said second passage system comprising a formation into which a first material feed passage means enters and from which a second passage means leads to the spray material nozzle, the ports of said passage means entering said formation in different planes, a shutoff valve means in said second passage system movable to a closed position to prevent flow of meterial therethrough or to an open position, said shutoff valve having a closure member entering said formation to first close off the port of said second passage means and thereafter closing off the port of said first passage means, pressure-responsive means to actuate said shutoff valve means, and passage means connecting said first passage system to said pressure-responsive means to move said valve to said open position.
Claim 2
Dependent Claim
228 words
A spraying device comprising a body, an air fitting secured to said body and adapted to be connected to a compressed air supply, a spray material fitting secured to said body and adapted to be connected to a spray material supply, an air discharge nozzle means, a spray material discharge nozzle means cooperating therewith, first passage system interconnecting said air fitting and said air nozzle means, a pressure-reducing valve in said first passage system to reduce the pressure of the air flowing from the fitting to the air nozzle, a second passage system interconnecting said spray material fitting and the maTerial nozzle, said second passage system comprising a formation into which a first material feed passage means enters and from which a second passage means leads to the spray material nozzle, the ports of said passage means entering said formation in different planes, a shutoff valve means in said second passage system movable to a closed position to prevent flow of meterial therethrough or to an open position, said shutoff valve having a closure member entering said formation to first close off the port of said second passage means and thereafter closing off the port of said first passage means, pressure-responsive means to actuate said shutoff valve means, and passage means connecting said first passage system to said pressure-responsive means to move said valve to said open position.
Claim 3
Dependent Claim
24 words
The spraying device as claimed in claim 1 wherein said closure member is a flexible diaphragm capable of assuming the shape of the formation.
Claim 4
Dependent Claim
38 words
The spraying device as claimed in claim 2 wherein the ports of the second passage means has a projecting lip encircling it, thereby causing the diaphragm to contact it before contacting the port of said first passage means.
Claim 5
Dependent Claim
32 words
The spraying device as claimed in claim 1 wherein said first passage system includes a relatively large space downstream of the pressure-reducing valve to which space the air nozzle means is connected.
Claim 6
Dependent Claim
38 words
The spraying device as claimed in claim 4 wherein said air nozzle means comprises a central air orifice concentric with and encompassing the orifice of the spray material nozzle, and additional air orifices lateral to said central orifice.
Claim 7
Dependent Claim
24 words
The spraying device as claimed in claim 1 wherein a flow-regulating valve is inserted in said second passage means before the material nozzle means.
Claim 8
Dependent Claim
52 words
The spraying device as claimed in claim 1 wherein said pressure-responsive means comprises adjustable spring means to bias the force of the feed air, and means connecting said spring means and said closure member to adjust the closing stroke of the closure member and thereby the flow area for the spray material.
Claim 9
Dependent Claim
26 words
The spraying device as claimed in claimed 1 wherein the second passage means is formed by a series of straight passages with no blind bores therebetween.
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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |