Patent US3829029A successfully refreshed from Google Patents.
US3829029A
Expired / Lapsed
US
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Abrasive blast cleaning system
Assignee: Pangborn Corp
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Filing: 1972-11-15
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Granted: 1974-08-13
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Expires: 1992-11-15
Abstract
Abstract An abrasive blast cleaning system includes blast means for granulating and scouring the sand removed from a no-bake mold whereby the sand is reconditioned for reuse in a subsequent nobake molding operation.
Inventors
- 👤 J Carpenter
- 👤 J Bowling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:55
CPC Classifications
B; B22; B22C; B22C5/00; B22C5/18; B02; B02C; B02C13/00; B02C13/02; B02C13/06; B02C13/09; B02C17/00; B02C17/18; B02C17/183; B02C17/1835; B02C17/184; Y; Y10; Y10S; Y10S241/00; Y10S241/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
72 words
A method of abrasive blast treatment for producing granular material from lumpy material created from a mold used to make castings, said method comprising the steps of removing a casting from a mold and creating a mixture from said mold including granular material and lumpy material, projecting blast particles against at least said lumpy material for breaking up the same into granular material, and separating said blast particles from said granular material.
Claim 2
Independent Claim
72 words
A method of abrasive blast treatment for producing granular material from lumpy material created from a mold used to make castings, said method comprising the steps of removing a casting from a mold and creating a mixture from said mold including granular material and lumpy material, projecting blast particles against at least said lumpy material for breaking up the same into granular material, and separating said blast particles from said granular material.
Claim 3
Dependent Claim
33 words
A method as defined in claim 1 including the step of collecting said blast particles following said separating step, and reusing the collected blast particles by again projecting them against said lumpy material.
Claim 4
Dependent Claim
84 words
A method as defined in claim 1 wherein said mold is a no-bake mold comprised of fine grained sand, binder material, rods, and contains a casting within said mold, and wherein the steps of removing a casint from a mold and creating a mixture from said mold include the steps of: projecting blast particles against said mold for breaking said mold into said mixture of granular material and lumpy material, and freeing said granular and lumpy material from said casting for cleaning said casting.
Claim 5
Dependent Claim
81 words
A method as defined in claim 3 wherein said step of projecting blast particles against said mold is performed at a first location and said step of projecting blast particles against at least said lumpy material is performed at a second location, said method further including the step of conveying at least said lumpy material and said rods from said first location to said second location, and cleaning said rods simultaneously while breaking up said lumpy material into fine grain sand.
Claim 6
Dependent Claim
26 words
A method as defined in claim 4 including the additional step of projecting said fine grain sand against an impact plate for scouring binder material therefrom.
Claim 7
Dependent Claim
25 words
A metHod as defined in claim 5 including the additional step of including blast particles with said fine grain sand during said step of projecting.
Claim 8
Dependent Claim
91 words
A method as defined in claim 1 wherein the step of separating said blast particles from said granular material includes the step of creating a free-falling stream of said blast particles and granular materials, passing a current of air through said free-falling stream for creating a first stream of blast particles and pea size granular material and a second stream of fine grain granular material, breaking up said pea size granular material into additional fine grain granular material, and then separating said additional fine grain granular material from said blast particles.
Claim 9
Dependent Claim
29 words
A method as defined in claim 7 including the addition step of projecting said fine grain granular material against an impact plate for scouring said fine grain granular material.
Claim 10
Dependent Claim
42 words
A method as defined in claim 1 including the step of creating a falling stream of said granular material and said blast particles prior to said separating step, and projecting additional blast particles against said falling stream for scouring said granular material.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |