Patent US3568757A successfully refreshed from Google Patents.
US3568757A
Expired / Lapsed
US
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Mold for producing single crystals
Assignee: RTX Corp
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Filing: 1968-07-22
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Granted: 1971-03-09
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Expires: 1988-07-22
Abstract
Abstract The mold is intended for producing single cast articles and is adapted for multiple casting having a central mold portion with lateral branches from the sides of which single crystals grow into the article molds.
Inventors
- 👤 Barry J Piearcey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:43
CPC Classifications
B; B22; B22D; B22D27/00; B22D27/04; B22D27/045
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
24 words
A mold as in claim 1 in which the article mold portion is connected to the lateral branch by a transverse connecting mold portion.
Claim 2
Dependent Claim
27 words
A mold as in claim 1 in which the article mold portion is attached to the lateral branch at a point spaced from the outer end thereof.
Claim 3
Dependent Claim
29 words
A mold as in claim 1 in which there are at least two lateral branches and at least two article mold portions in opposed relation on each lateral branch.
Claim 4
Dependent Claim
39 words
A mold as in claim 1 in which there is protuberance on the lateral branch close to the article mold portion and at a point between the article mold portion and the central starter portion to form a constriction.
Claim 5
Dependent Claim
37 words
A mold as in claim 1 in which a freckle catcher is formed at point of attachment of the article mold portion to the lateral branch in the form of an upwardly extending recess in the mold.
Claim 6
Dependent Claim
23 words
A mold as in claim 1 in which the lateral branch extends from the central portion at a point below the top thereof.
Claim 7
Dependent Claim
90 words
A mold for producing directionally-oriented, single-crystal castings, the mold being positioned on a chill plate for the casting operation, said mold including a central starter portion having its lower end open to rest on the chill plate, said portion extending substantially vertically, at least one lateral branch portion extending outwardly from the side of the central portion at a point below the top thereof, and at least one article mold attached at the side of the lateral branch portion at a point spaced from the end of the branch portion.
Claim 8
Dependent Claim
21 words
A mold as in claim 8 in which there is a restriction in the central starter portion below the lateral branch.
Claim 9
Dependent Claim
28 words
A mold as in claim 8 in which there is a restriction in the lateral branch between the starter portion and the attachment point of the article mold.
Claim 10
Dependent Claim
23 words
A mold as in claim 8 in which there is a transverse connecting mold portion between the lateral branch and the article mold.
Claim 11
Dependent Claim
24 words
A mold as in claim 11 in which there is a blind riser in the transverse connecting mold portion adjacent to the article mold.
Claim 12
Dependent Claim
66 words
A mold as in claim 8 in which there are a plurality of lateral branch portions projecting from the starter portion, and a plurality of article molds on the sides of each lateral branch and in which the longitudinal axes of the article molds are oriented with respect to the opeN lower end of the starter portion to produce the desired orientation in the cast article.
Claim 13
Dependent Claim
33 words
A mold as in claim 8 in which the central starter portion is reduced in cross-sectional area at a point between the open bottom end and the attachment of the lateral branch thereto.
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) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |