US3741707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dismemberable mold for centrifugally casting finned structures
Assignee: General Electric Co
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Filing: 1972-01-24
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Granted: 1973-06-26
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Expires: 1992-01-24
Abstract
Abstract Finned motor frames above 10 inches in diameter are centrifugally cast utilizing a mold formed of four individual cast iron sections each having approximately a quadrant of an enlarged annular plate secured at opposite ends thereof to provide circular wheels for rotation of the mold. The quadrants of the plate, in association with orthogonal seating surfaces at the edges of the mold sections, provide coarse centering of the mold sections as the sections are assembled while fine centering of the sections to produce a smooth circumferential edge on the plate is achieved by tightening bolts extending orthogonally through eyelets protruding substantially radially outward at the edges of each mold section. Brackets also are provided along the exterior surface of each mold section to strip the mold from the cast motor frame by the application of lateral force to the brackets.
Inventors
- 👤 F Baumann
- 👤 A Miller
- 👤 Bahn W La
- 👤 Nary R Mac
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:12
CPC Classifications
B; B29; B29C; B29C41/00; B29C41/34; B29C41/38; B29C41/386; B29C33/00; B29C33/20; B29C33/22; B29C33/44; B29C41/02; B29C41/04; B29C41/042; B29C33/30; B29L; B29L2031/00; B29L2031/18; B29L2031/748; B29L2031/749
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
123 words
A dismemberable mold for centrifugally casting cylindrical objects having protrusions extending outwardly therefrom said mold comprising a plurality of individual mold sections internally contoured to a substantially arcuate surface having grooves therein geometrically complimentary to the desired periphery of the object to be cast, means disposed along the outer surface of said mold sections for clamping said sections into a mechanically secure structure having a substantially cylindrical configuration and segmented annular plates disposed at axially spaced locations along the outer surface of said mold structure, individual segments of said plates being fixedly secured to individual sections of said mold at an attitude to form a circular outer periphery upon juxtaposition of said sections to permit rotation of said mold upon said segmented plates.
Claim 2
Dependent Claim
123 words
A dismemberable mold for centrifugally casting cylindrical objects having protrusions extending outwardly therefrom said mold comprising a plurality of individual mold sections internally contoured to a substantially arcuate surface having grooves therein geometrically complimentary to the desired periphery of the object to be cast, means disposed along the outer surface of said mold sections for clamping said sections into a mechanically secure structure having a substantially cylindrical configuration and segmented annular plates disposed at axially spaced locations along the outer surface of said mold structure, individual segments of said plates being fixedly secured to individual sections of said mold at an attitude to form a circular outer periphery upon juxtaposition of said sections to permit rotation of said mold upon said segmented plates.
Claim 3
Dependent Claim
66 words
A dismemberable mold for centrifugally casting cylindrical objects according to claim 1 wherein said segmented annular plates are located at opposite ends of said mold segments, the outer surface of said plate extending radially beyond said mold clamping means and the radially inner surface of said plates terminating short of the axial center of said structure to provide an axial passage extending completely through said mold.
Claim 4
Dependent Claim
45 words
A dismemberable mold for centrifugally casting cylindrical objects according to claim 1 further including means fixedly secured along the outer surface of each mold section to permit application of force to said section in a direction tending to separate said section from the cast object.
Claim 5
Dependent Claim
37 words
A dismemberable mold for centrifugally casting cylindrical objects according to claim 3 further including an axial opening extending completely through said mold to receive an axially disposed arbor for fixedly retaining said mold in a vertical position.
Claim 6
Dependent Claim
26 words
A dismemberable mold for centrifugally casting cylindrical objects according to claim 1 wherein the inner diameter of said cylindrical mold is in excess of 10 inches.
Claim 7
Dependent Claim
135 words
A dismemberable mold for centrifugally casting cylindrical objects having an irregular outer periphery, said mold comprising at least three individual mold sections positionable relative to each other to form a circularly closed structure, segmented plates fixedly secured to opposite ends of said mold sections, said plates lying in a plane perpendicular to the axis of said circularly closed structure and being dissected along approximately radially extending lines to coarsely position said mold segments relative to each other upon the application of an inwardly directed force to the outer surface of said mold, and means disposed along the outer surface of said mold sections for finely positioning said mold sections by the application of force to said mold sections at an angular disposition relative to at least two faces along the edges of said mold sections.
Claim 8
Dependent Claim
135 words
A dismemberable mold for centrifugally casting cylindrical objects having an irregular outer periphery, said mold comprising at least three individual mold sections positionable relative to each other to form a circularly closed structure, segmented plates fixedly secured to opposite ends of said mold sections, said plates lying in a plane perpendicular to the axis of said circularly closed structure and being dissected along approximately radially extending lines to coarsely position said mold segments relative to each other upon the application of an inwardly directed force to the outer surface of said mold, and means disposed along the outer surface of said mold sections for finely positioning said mold sections by the application of force to said mold sections at an angular disposition relative to at least two faces along the edges of said mold sections.
Claim 9
Dependent Claim
66 words
A dismemberable mold for centrifugally casting cylindrical objects according to claim 6 wherein the edges of the mold sections are approximately orthogonally stepped and said fine positioning means applies a force to the edges of said mold sections at an approximately 45* angle relative to both faces forming the orthogonal step to obtain two dimensional movement of one mold section relative to a second mold section.
Claim 10
Dependent Claim
38 words
A dismemberable mold for centrifugally casting cylindrical objects according to claim 6 wherein said fine positioning force applied to said mold units is disposed at an orthogonal attitude relative to the approximately radially extending dissections in said plate.
Claim 11
Dependent Claim
40 words
A dismemberable mold according to claim 8 further including means secured along the outer surface of each mold section to permit application of a force to said section in a direction tending to separate said section from the cast object.
Claim 12
Dependent Claim
130 words
A dismemberable mold for centrifugally casting cylindrical structures having protrusions extending outwardly therefrom, said mold compRising a plurality of individual mold sections disposed with edges of adjacent sections in juxtaposition to form a circularly closed structure, arcuate segments fixedly secured to opposite ends of each mold section to form a mold unit, said segments extending radially beyond the outer surface of said mold sections to form a substantially continuous circular surface at opposite ends of said mold when said sections are in an abutting disposition, the radially inner edge of said annular segments terminating short of the axial center of said mold to provide an axial opening completely through said mold and means disposed adjacent the edges of each mold unit for securing said units into a mechanically secure structure.
Claim 13
Dependent Claim
130 words
A dismemberable mold for centrifugally casting cylindrical structures having protrusions extending outwardly therefrom, said mold compRising a plurality of individual mold sections disposed with edges of adjacent sections in juxtaposition to form a circularly closed structure, arcuate segments fixedly secured to opposite ends of each mold section to form a mold unit, said segments extending radially beyond the outer surface of said mold sections to form a substantially continuous circular surface at opposite ends of said mold when said sections are in an abutting disposition, the radially inner edge of said annular segments terminating short of the axial center of said mold to provide an axial opening completely through said mold and means disposed adjacent the edges of each mold unit for securing said units into a mechanically secure structure.
Claim 14
Dependent Claim
38 words
A dismemberable mold for centrifugally casting cylindrical structures according to claim 10 wherein said mold is formed of four individual sections and each annular segment terminates along an edge disposed parallel to the radii subtending the mold sections.
Claim 15
Dependent Claim
64 words
A dismemberable mold for centrifugally casting cylindrical structures according to claim 11 wherein said individual mold sections are characterized by an inner surface having a plurality of approximately equally spaced notches extending substantially the axial length of said mold section, each notch protruding inwardly of said mold section at a draft angle between 3* and 5* to form axial fins along the cast structure.
Claim 16
Dependent Claim
167 words
A dismemberable mold for centrifugally casting large diameter cylindrical structures having protruding fins along the outer surface of the structure, said mold comprising a plurality of individual mold sections disposed with the edges of adjacent sections in abutting disposition to form a circularly closed structure, an arcuate segment fixedly secured to opposite ends of each said section, said segments extending radially in opposite directions from said mold sections to permit unsupported standing of each said mold section upon the attached arcuate segment, the radially outer periphery of said arcuate segments forming a substantially continuous circular surface at opposite ends of said mold when said sections are disposed in an abutting attitude and the radially inner edge of said arcuate segments terminating short of the axial center of said mold to provide an axial opening completely through said mold and means disposed along the outer surface of said mold sections to permit application of a lateral force to said sections to strip said sections from the cast structure.
Claim 17
Dependent Claim
167 words
A dismemberable mold for centrifugally casting large diameter cylindrical structures having protruding fins along the outer surface of the structure, said mold comprising a plurality of individual mold sections disposed with the edges of adjacent sections in abutting disposition to form a circularly closed structure, an arcuate segment fixedly secured to opposite ends of each said section, said segments extending radially in opposite directions from said mold sections to permit unsupported standing of each said mold section upon the attached arcuate segment, the radially outer periphery of said arcuate segments forming a substantially continuous circular surface at opposite ends of said mold when said sections are disposed in an abutting attitude and the radially inner edge of said arcuate segments terminating short of the axial center of said mold to provide an axial opening completely through said mold and means disposed along the outer surface of said mold sections to permit application of a lateral force to said sections to strip said sections from the cast structure.
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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) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |