US4002418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casting apparatus
Assignee: American Optical Corp
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Filing: 1975-07-10
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Granted: 1977-01-11
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Expires: 1995-07-10
Abstract
Abstract A centrifugal casting mold and mold clamping system adaptable to mass-production technology including a tapered multiple part mold and similarly tapered sleeve within which the assembled mold is insertable for resin filling and centrifuging.
Inventors
- 👤 Henry W. Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:55
CPC Classifications
B; B29; B29D; B29D12/00; B29D12/02; B29C; B29C39/00; B29C39/02; B29C39/04; B29C39/08; B29L; B29L2012/00; B29L2012/005; Y; Y10; Y10S; Y10S425/00; Y10S425/808
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
96 words
Centrifugal casting apparatus comprising the combination of: a mold having an internal casting cavity with communication into said cavity adjacent a first end of the mold, an opposite second end of the mold normally being closed, said mold further being exteriorly tapered from a point adjacent said first end thereof inwardly toward and extending to said opposite second end; a mold clamping sleeve having an internal taper substantially matching the external taper of said mold for receiving the mold, and external portions of said sleeve being constructed and arranged to adapt said sleeve to a centrifuge.
Claim 2
Dependent Claim
96 words
Centrifugal casting apparatus comprising the combination of: a mold having an internal casting cavity with communication into said cavity adjacent a first end of the mold, an opposite second end of the mold normally being closed, said mold further being exteriorly tapered from a point adjacent said first end thereof inwardly toward and extending to said opposite second end; a mold clamping sleeve having an internal taper substantially matching the external taper of said mold for receiving the mold, and external portions of said sleeve being constructed and arranged to adapt said sleeve to a centrifuge.
Claim 3
Dependent Claim
78 words
Apparatus according to claim 1 wherein said mold comprises a multiplicity of juxtapositionable casting sections between each adjoining pair of which there is provided at least one casting cavity surrounded by matching face portions wherewith said cavities may be peripherally sealed against ingress of air and gases when said separable casting sections are interfacially mated within said sleeve and centrifically driven into said internal taper of said sleeve in a direction toward its end of diminishing volumetric accommodation.
Claim 4
Dependent Claim
23 words
Apparatus according to claim 2 wherein there is a multiplicity of casting cavities between each pair of separable casting sections of said mold.
Claim 5
Dependent Claim
12 words
Apparatus according to claim 3 wherein said multiplicity of cavities are intercommunicated.
Claim 6
Dependent Claim
61 words
Apparatus according to claim 2 wherein said separable casting sections number three and extend longitudinally of said mold, the intermediate of said three casting sections forming with each of the remaining two casting sections one of said adjoining pair at each of its opposite sides, said intermediate casting section thus being common to said two pairs of interfacially mateable casting sections.
Claim 7
Dependent Claim
25 words
Apparatus according to claim 2 wherein the portion of said mold extending from said point adjacent said one end to said second end is frustoconical.
Claim 8
Dependent Claim
18 words
Apparatus according to claim 2 wherein said mold has a greater coefficient of thermal expansion than said sleeve.
Claim 9
Dependent Claim
22 words
Apparatus according to claim 2 wherein said external taper of said mold and said internal taper of said sleeve are locking tapers.
Claim 10
Dependent Claim
63 words
Apparatus according to claim 2 wherein, in addition to said casting cavities, there is included a reservoir space adjacent said one end of the mold and a passageway interconnecting said reservoir space and casting cavities, said reservoir space being of a size supportable of a quantity of casting material at least equal to that required to fill all casting cavities of said mold.
Claim 11
Dependent Claim
24 words
Apparatus according to claim 2 wherein said mold is formed of an aluminum filled epoxy resin and said clamped sleeve is formed of steel.
References Cited (Backward Citations)
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US2633605A
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Cited
US3314639A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-11 | 1980-07-12 | 1981-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-11 | 1984-07-12 | 1985-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-11 | 1988-07-12 | 1989-01-11 | $7700.00 | Window Closed / Lapsed |