Patent US3631791A successfully refreshed from Google Patents.
US3631791A
Expired / Lapsed
US
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Foundry mold ventilation system
Assignee: Harris Muff Inc
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Filing: 1969-04-23
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Granted: 1972-01-04
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Expires: 1989-04-23
Abstract
Abstract A technique for removing steam, smoke and fumes given off by a foundry mold during cooling of poured metal wherein each mold within a foundry is individually vented through either a vacuum hose connection with an exhaust system permanently built into the foundry or by an individual mold self-contained collection device. Several specific devices are disclosed which capture the fumes and smoke immediately above and around the mold.
Inventors
- 👤 Robert A Harris
- 👤 Spencer Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:11
CPC Classifications
B; B22; B22D; B22D45/00; B22D45/005; B08; B08B; B08B15/00; B08B15/007
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
59 words
A foundry mold venting device, comprising, a gas collecting chamber adapted for connection at an end of a flexible hose, said chamber including a plurality of openings through which air may be drawn, at least one spike rigidly attached to an underneath side of said chamber, and a rigid baffle sheet fixed to a top side of said chamber.
Claim 2
Dependent Claim
59 words
A foundry mold venting device, comprising, a gas collecting chamber adapted for connection at an end of a flexible hose, said chamber including a plurality of openings through which air may be drawn, at least one spike rigidly attached to an underneath side of said chamber, and a rigid baffle sheet fixed to a top side of said chamber.
Claim 3
Dependent Claim
42 words
A foundry mold venting device according to claim 1 wherein said chamber is generally of a conical shape between a small underside and a wider top area, and wherein said openings are located around said conical shape near the top side thereof.
Claim 4
Dependent Claim
34 words
A portable foundry mold venting device, comprising, a length of hollow tube with perforations therethrough along one side thereof, and a roll of flexible heat resistant sheet material rotatably mounted upon said perforated tube.
Claim 5
Dependent Claim
34 words
A portable foundry mold venting device, comprising, a length of hollow tube with perforations therethrough along one side thereof, and a roll of flexible heat resistant sheet material rotatably mounted upon said perforated tube.
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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) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |