US4034955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casting apparatus
Assignee: American Optical Corp
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Filing: 1976-09-23
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Granted: 1977-07-12
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Expires: 1996-09-23
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 19:06
CPC Classifications
B; B29; B29C; B29C39/00; B29C39/02; B29C39/04; B29C39/08; B29D; B29D12/00; B29D12/02; B29L; B29L2012/00; B29L2012/005; Y; Y10; Y10S; Y10S425/00; Y10S425/808
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
130 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 of an oval cross-sectional shape having orthogonal major and minor axes and tapered throughout its length; a mold retaining sleeve having an internal circular taper substantially matching the portion of the taper of said mold in the plane of said major axis of said oval shape wherewith clearance is provided between said mold and sleeve in the plane of said minor axes when said mold is received in said sleeve for subsequent centrifugation: and external portions of said sleeve being constructed and arranged to adapt said sleeve to a centrifuge.
Claim 2
Dependent Claim
130 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 of an oval cross-sectional shape having orthogonal major and minor axes and tapered throughout its length; a mold retaining sleeve having an internal circular taper substantially matching the portion of the taper of said mold in the plane of said major axis of said oval shape wherewith clearance is provided between said mold and sleeve in the plane of said minor axes when said mold is received in said sleeve for subsequent centrifugation: and external portions of said sleeve being constructed and arranged to adapt said sleeve to a centrifuge.
Claim 3
Dependent Claim
93 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, the plane of each being substantially orthogonal to said major axis of said mold and 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 centrifugally 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 interconnected.
Claim 6
Dependent Claim
69 words
Apparatus according to claim 2 wherein said separable casting sections number three and extend longitudidly of said mold in planes orthogonal to said mold major axis, 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
18 words
Apparatus according to claim 2 wherein said mold has a greater coefficient of thermal expansion then said sleeve.
Claim 8
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 9
Dependent Claim
24 words
Apparatus according to claim 2 wherein said mold is formed of an aluminum filled epoxy resin and said clamping sleeve is formed of steel.
References Cited (Backward Citations)
US2354026A
Cited
US2466277A
Cited
US2543303A
Cited
US2633605A
Cited
US2629130A
Cited
US3314639A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |