US3842899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for carrying out full-form casting process
Assignee: Saint Gobain Isover G+H AG
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Filing: 1972-11-28
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Granted: 1974-10-22
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Expires: 1992-11-28
Abstract
Abstract A system for casting objects in molds with patterns which are destroyed in situ, i.e., one-piece casting, in which the mold flask, box, chest or casing is formed with a perforated support for the mold-forming material (e.g., sand) and is mounted on a turntable with other similar molds for stepping through a number of stations. The mold is provided with means for pressurizing the mold and subjecting same alternately to suction.
Inventors
- 👤 Lienhard H Hauser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:03
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/02; B22C9/04; B22C9/046; B22C11/00; B22C9/03
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
174 words
A casting apparatus, comprising: a plurality of mold flasks, each provided with at least one gaspermeable wall separating a casting chamber from a plenum chamber; a horizontal endless conveyor band for intermittently advancing said mold flasks along a closed transport path; and means selectively communicating with said plenum chambers of said flasks at selected stations of advance of said flasks along said path for pressurizing said flasks to fluidize a mold-forming medium therein and for subjecting said flasks to suction to compact said medium about a platen, said means selectively communicating with said plenum chamber being so constructed and arranged as to alternately subject each of said flasks to pressurization and suction as said flasks are advanced along said path, said plenum chambers being provided with gas fittings, said means selectively communicating with said plenum chambers including mating fittings adjacent said path and engageable with the fittings of plenum chambers of flasks registering therewith, said mating fittings being mounted upon a support member; and means for shifting said support member transversely to said path.
Claim 2
Dependent Claim
174 words
A casting apparatus, comprising: a plurality of mold flasks, each provided with at least one gaspermeable wall separating a casting chamber from a plenum chamber; a horizontal endless conveyor band for intermittently advancing said mold flasks along a closed transport path; and means selectively communicating with said plenum chambers of said flasks at selected stations of advance of said flasks along said path for pressurizing said flasks to fluidize a mold-forming medium therein and for subjecting said flasks to suction to compact said medium about a platen, said means selectively communicating with said plenum chamber being so constructed and arranged as to alternately subject each of said flasks to pressurization and suction as said flasks are advanced along said path, said plenum chambers being provided with gas fittings, said means selectively communicating with said plenum chambers including mating fittings adjacent said path and engageable with the fittings of plenum chambers of flasks registering therewith, said mating fittings being mounted upon a support member; and means for shifting said support member transversely to said path.
Claim 3
Dependent Claim
36 words
The apparatus defined in claim 1 wherein said mating fittings for pressurization of a plenum chamber and application of suction to a plenum chamber are mounted upon said support member jointly and are jointly shiftable thereon.
Claim 4
Dependent Claim
40 words
The apparatus defined in claim 1 wherein each of said mold flasks is upwardly open and said wall is an air-permeable horizontal plate in each flask separating said casting chamber above said plate from said plenum chamber below said plate.
Claim 5
Dependent Claim
20 words
The apparatus defined in claim 3, further comprising partitions subdividing said plenum chamber into a plurality of individual pressurizable compartments.
Claim 6
Dependent Claim
14 words
THe apparatus defined in claim 3 wherein said plate is composed of sintered metal.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |