US4251573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for rust-protecting treatment
Assignee: Tuff-Kote Dinol AB
•
Filing: 1978-10-18
•
Granted: 1981-02-17
•
Expires: 1998-10-18
Abstract
Abstract A method for applying a rust-protecting agent in straight as well as curved hollow spaces by means of spraying, either with air or airless, utilizes a flexible hose provided at its front end with a nozzle arranged to provide a radially directed circular spray field. The hose is introduced in the space to be treated and a rust protecting agent is introduced through said hose and the nozzle under such a pressure that the front end of the hose carrying the nozzle partly raises from the inner surface of the space. The hose is withdrawn through all the space.
Inventors
- 👤 Claes H. Holm
- 👤 John Paulsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:28
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/22; B05D7/222; B05B; B05B13/00; B05B13/06; B05B13/0627; B05D1/00; B05D1/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
137 words
A method for applying a rust-protecting agent in straight as well as curved hollow spaces by means of airless spraying, comprising the steps of: introducing a flexible hose horizontally into the hollow space to be treated, said hose having a nozzle disposed at its front end; said nozzle formed to give a constant circular spray field directed radially from the bore of said hose; introducing through said hose by airless dispensing means a rust-protecting agent under a steady pressure of at least four MPa such that the front end of the hose carrying the nozzle partly rises from the inner surface of the hollow space due to the forces exerted on the nozzle by the rust-protecting agent issuing therefrom thereby stably suspending the nozzle within the hollow space; and withdrawing the hose through all the hollow space.
Claim 2
Independent Claim
137 words
A method for applying a rust-protecting agent in straight as well as curved hollow spaces by means of airless spraying, comprising the steps of: introducing a flexible hose horizontally into the hollow space to be treated, said hose having a nozzle disposed at its front end; said nozzle formed to give a constant circular spray field directed radially from the bore of said hose; introducing through said hose by airless dispensing means a rust-protecting agent under a steady pressure of at least four MPa such that the front end of the hose carrying the nozzle partly rises from the inner surface of the hollow space due to the forces exerted on the nozzle by the rust-protecting agent issuing therefrom thereby stably suspending the nozzle within the hollow space; and withdrawing the hose through all the hollow space.
Claim 3
Dependent Claim
25 words
The method according to claim 1, wherein the spray nozzle is also provided with an axially directed bore, to give an axially directed spray field.
Claim 4
Dependent Claim
17 words
The method according to claim 4, wherein the spray nozzle gives an axially directed, conical spray field.
Claim 5
Dependent Claim
33 words
A method according to claim 1, wherein the hose has sufficient torsional rigidity that a rotation of the rear end of the hose gives a corresponding rotation of the nozzle of the hose.
References Cited (Backward Citations)
US2930531A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-17 | 1984-08-18 | 1985-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-17 | 1988-08-18 | 1989-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-17 | 1992-08-18 | 1993-02-17 | $7700.00 | Window Closed / Lapsed |