US3939898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mould manufacturing device
Assignee: Individual
•
Filing: 1973-11-26
•
Granted: 1976-02-24
•
Expires: 1993-11-26
Abstract
Abstract In the manufacture of a mould by the so-called lost wax method, the position and space occupied by a set of blank-carrying elongate members of fusible or calcinable material supported on an ogival head or cone are controlled by a gauge including a ring slidably mounted along a vertical rod. The gauge is then replaced by a cylinder forming a receptacle which receives a hardenable refractory material embedding said set. After hardening, the cone is removed and the fusible or calcinable material removed by heating to provide mould cavities.
Inventors
- 👤 Claude Petro
- 👤 Andre Glise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:47
CPC Classifications
B; B22; B22C; B22C7/00; B22C7/02; Y; Y10; Y10S; Y10S164/00; Y10S164/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
142 words
A mold manufacturing device comprising a support, an ogival head extending vertically above said support to support in turn a set of rods carrying blanks of pieces to be molded in calcinable or fusible material, a lower ring detachably secured to said support in surrounding relationship, a vertical rod carried by and upstanding from said lower ring, an upper ring mounted for vertical sliding movement on said rod coaxially with said lower ring, said upper ring being horizontally disposed, there being at least one graduation on said rod indicating the position of the upper ring along said rod relative to the location of the thermal center of a mold to be cast on said support about said head after said rod and rings are removed from said support, and means for releasably securing said upper ring in predetermined positions along said rod.
Claim 2
Dependent Claim
142 words
A mold manufacturing device comprising a support, an ogival head extending vertically above said support to support in turn a set of rods carrying blanks of pieces to be molded in calcinable or fusible material, a lower ring detachably secured to said support in surrounding relationship, a vertical rod carried by and upstanding from said lower ring, an upper ring mounted for vertical sliding movement on said rod coaxially with said lower ring, said upper ring being horizontally disposed, there being at least one graduation on said rod indicating the position of the upper ring along said rod relative to the location of the thermal center of a mold to be cast on said support about said head after said rod and rings are removed from said support, and means for releasably securing said upper ring in predetermined positions along said rod.
Claim 3
Dependent Claim
33 words
A device as claimed in claim 1, said support having a cylindrical upper side wall that terminates downwardly in an upwardly facing annular shoulder that contacts the lower edge of said lower ring.
Claim 4
Dependent Claim
62 words
A device as claimed in claim 1, each of said upper and lower rings being formed in two parts pivotally connected about an axis parallel to said rod thereby to permit the two parts of each ring to pivot between a closed position and an open position providing an opening at least as great as the diameter of the rings when closed.
References Cited (Backward Citations)
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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) | 1979-02-23 | 1979-08-25 | 1980-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-23 | 1983-08-25 | 1984-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-23 | 1987-08-25 | 1988-02-24 | $7700.00 | Window Closed / Lapsed |