Patent US3625124A successfully refreshed from Google Patents.
US3602293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contourable self-cleaning vent for core boxes and the like
Assignee: Individual
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Filing: 1970-06-19
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Granted: 1971-08-31
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Expires: 1990-06-19
Abstract
Abstract A vent comprising a generally tubular body having a loosely fitting plug in the central opening to form an annular vent passage between the plug and the tubular body. The end surfaces of the plug and tubular body are coterminous and can be contoured as by grinding, machining, etc. to provide any desired contour to its face without appreciably effecting the width of the annular venting passage between the tubular member and the plug. The plug is sufficiently long and is provided with a sufficiently shallow taper that the removal of metal from the ends of the tubular member and plug does not open up the clearance between the tubular member and plug to a degree approaching the size of the particles of sand to be retained. The contouring operation, therefore, does not change the size of the clearance to a degree where sand passes therethrough.
Inventors
- 👤 Charles W Barrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:16
CPC Classifications
B; B22; B22C; B22C15/00; B22C15/23; B22C15/24; B22C15/245; B22C7/00; B22C7/06; B22C7/065
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
105 words
A core vent and the like for preventing passage of solids of a predetermined size comprising: a generally tubular body having a central opening therethrough, a plug in said central opening with the outer face of said plug being generally coextensive with one end surface of said tubular body, said plug having clearance with respect to said tubular body which clearance is less than said predetermined size of said solids, and at least three fingers connecting the bottom of said plug and said tubular body for supporting said plug, said fingers extending nonradially between said plug and their point of attachment to said tubular body.
Claim 2
Dependent Claim
105 words
A core vent and the like for preventing passage of solids of a predetermined size comprising: a generally tubular body having a central opening therethrough, a plug in said central opening with the outer face of said plug being generally coextensive with one end surface of said tubular body, said plug having clearance with respect to said tubular body which clearance is less than said predetermined size of said solids, and at least three fingers connecting the bottom of said plug and said tubular body for supporting said plug, said fingers extending nonradially between said plug and their point of attachment to said tubular body.
Claim 3
Dependent Claim
12 words
The core vent of claim 1 wherein said fingers are arcuately shaped.
Claim 4
Dependent Claim
16 words
The core vent of claim 1 wherein the fingers are arcuately shaped in a vertical direction.
Claim 5
Dependent Claim
28 words
The core vent of claim 1 wherein the fingers are attached to said body member at a point circumferentially displaced from their point of attachment to said plug.
Claim 6
Dependent Claim
14 words
The core vent of claim 1 wherein the fingers are made of a bimetal.
Claim 7
Dependent Claim
24 words
The core vent of claim 1 wherein said fingers have a length at least approximately two times the radial distance spanned by the fingers.
Claim 8
Dependent Claim
37 words
The core vent of claim 1 wherein said fingers support said plug a distance beneath said one end of said tubular body which distance is at least approximately two times the radial distance spanned by said fingers.
Claim 9
Dependent Claim
16 words
The core vent of claim 1 wherein said clearance is greater than 1/2 said predetermined size.
Claim 10
Dependent Claim
38 words
The core vent of claim 1 wherein said fingers are formed integrally with a centrally located hub and a circumferential ring, said plug being secured to said hub, and said circumferential ring being supported by said tubular body.
Claim 11
Dependent Claim
41 words
The core vent of claim 9 wherein said one end of said tubular body is counterbored around said central opening, said circumferential ring is seated in said counterbore, and the walls of said tubular body are rolled over said circumferential ring.
Claim 12
Dependent Claim
47 words
The core vent of claim 9 wherein said plug is tapered with its large diameter end positioned adjacent said one end surface of said tubular body, and with its small diameter end being positioned adjacent to and having a diameter generally equal to that of said hub.
Claim 13
Dependent Claim
38 words
The core vent of claim 9 wherein said fingers are secured to said hub at a location spaced circumferentially from their attachment to said body member and whereby relative axial movement produces a rotating action on the plug.
Claim 14
Dependent Claim
12 words
The core vent of claim 9 wherein said fingers are generally S-shaped.
Claim 15
Dependent Claim
19 words
The core vent of claim 13 wherein said sheet of metal is a bimetal laminate which produces thermal deflection.
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) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |