US4519971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Front loading centrifugal spin caster
Assignee: Tekcast Industries Inc
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Filing: 1984-03-26
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Granted: 1985-05-28
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Expires: 2004-03-26
Abstract
Abstract A front loading spin caster for spin casting a mold includes a vertically stationary top plate, a vertical movable bottom plate, a housing in which the top and bottom plates are disposed, a loading door disposed on one of the sides of the housing and adapted to allow the mold to be moved therethrough in a generally horizontal direction and placed on the bottom plate. The bottom plate can then be moved vertically upward to cause the mold to contact the top plate and a rotational force applied to the top plate propagates from the top plate through the mold to the bottom plate, the top plate, bottom plate and mold thus rotating together.
Inventors
- 👤 Leonard S. Schaer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:01
CPC Classifications
B; B29; B29C; B29C39/00; B29C39/02; B29C39/04; B29C39/08; B22; B22D; B22D13/00; B22D13/06; B22D13/063
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
136 words
A method of spin casting a mold in a spin caster, comprising: loading a mold through a side of the spin caster housing onto a vertically movable bottom plate adapted to rotate about a substantially vertical axis, and underneath a vertically stationary top plate adapted to rotate about said substantially vertical axis; moving the bottom plate vertically upward to cause the mold to contact the top plate; applying a rotational force to the top plate which propagates through the mold to the bottom plate to thus cause the top plate, the bottom plate and the mold to rotate together; introducing a liquid material into the mold through an aperture in the top of the top plate; terminating the rotational force; moving the bottom plate vertically downward; and removing the mold through the side of the housing.
Claim 2
Independent Claim
136 words
A method of spin casting a mold in a spin caster, comprising: loading a mold through a side of the spin caster housing onto a vertically movable bottom plate adapted to rotate about a substantially vertical axis, and underneath a vertically stationary top plate adapted to rotate about said substantially vertical axis; moving the bottom plate vertically upward to cause the mold to contact the top plate; applying a rotational force to the top plate which propagates through the mold to the bottom plate to thus cause the top plate, the bottom plate and the mold to rotate together; introducing a liquid material into the mold through an aperture in the top of the top plate; terminating the rotational force; moving the bottom plate vertically downward; and removing the mold through the side of the housing.
Claim 3
Dependent Claim
55 words
The method of claim 1 wherein the step of loading comprises: opening a loading door disposed on the side of the housing, thereby automatically moving the bottom plate vertically downward; moving the mold in a substantially horizontal direction onto the bottom plate; and closing the loading door thereby automatically moving the bottom plate vertically upward.
Claim 4
Dependent Claim
32 words
The method of claim 2 wherein the step of moving the mold onto the bottom plate comprises moving said mold into abutment with a plurality of indexing pins on the bottom plate.
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) | 1988-05-27 | 1988-11-26 | 1989-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-27 | 1992-11-26 | 1993-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-27 | 1996-11-26 | 1997-05-28 | $7700.00 | Window Closed / Lapsed |