US3757850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-pressure casting apparatus
Assignee: SCHMIDT GmbH
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Filing: 1972-01-19
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Granted: 1973-09-11
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Expires: 1992-01-19
Abstract
Abstract Low-pressure casting apparatus includes a holding furnace for molten metal which is sealed and supplied with gas under pressure. A riser pipe is immersed in the molten metal and communicates with the base plate of an ingot mold positioned on top of the holding furnace. Two opposed flat, upright members are positioned to the rear of the sidewalls of the holding furnace and a horizontal bridge member is mounted between the upright flat members. The bridge member has a forwardly opening U-shaped slot in which a tension element is horizontally slidably mounted. The tension element contains guide means for tension rods which are attached to the core cover plate, which is part of the ingot mold.
Inventors
- 👤 A Diez
- 👤 J Heim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:27
CPC Classifications
B; B22; B22D; B22D18/00; B22D18/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
183 words
In low-pressure casting apparatus which comprises holding furnace means for a molten metal bath, said furnace means having cover means and being adapted to be closed gas tight and supplied with gas under pressure, ingot mold means positioned on top of said furnace means and including base plate means carrid by the cover means of said furnace means and core cover plate means having attached to the underside thereof core means, riser pipe means adapted to be immersed in said metal bath and communicating with the base plate means of the ingot mold means, and a plurality of upright tension rods adapted to vertically move the core cover plate means of said ingot mold, the improvement which compises two opposite upright flat members positioned to the rear of the sidewalls of said furnace means and horizontal bridge means mounted between said upright flat members, said bridge means having a forwardly opening U-shaped slot in which is horizontally slidably mounted tension means, said tension means having guide means for said tension rods, and said bridge means having means to horizontally slide said tension means.
Claim 2
Dependent Claim
183 words
In low-pressure casting apparatus which comprises holding furnace means for a molten metal bath, said furnace means having cover means and being adapted to be closed gas tight and supplied with gas under pressure, ingot mold means positioned on top of said furnace means and including base plate means carrid by the cover means of said furnace means and core cover plate means having attached to the underside thereof core means, riser pipe means adapted to be immersed in said metal bath and communicating with the base plate means of the ingot mold means, and a plurality of upright tension rods adapted to vertically move the core cover plate means of said ingot mold, the improvement which compises two opposite upright flat members positioned to the rear of the sidewalls of said furnace means and horizontal bridge means mounted between said upright flat members, said bridge means having a forwardly opening U-shaped slot in which is horizontally slidably mounted tension means, said tension means having guide means for said tension rods, and said bridge means having means to horizontally slide said tension means.
Claim 3
Dependent Claim
15 words
Low-pressure casting apparatus of claim 1 wherein said ingot mold means includes movable mold means.
Claim 4
Dependent Claim
14 words
Low-pressure casting apparatus of claim 2 wherein said movable mold means are hydraulically activated.
Claim 5
Dependent Claim
13 words
Low-pressure casting apparatus of claim 1 wherein said tension rods are hydraulically activated.
Claim 6
Dependent Claim
17 words
Low-pressure casting apparatus of claim 1 wherein the tension means of said bridge means is hydraulically activated.
Claim 7
Dependent Claim
19 words
Low-pressure casting apparatus of claim 1 wherein said bridge means is vertically adjustably mounted between said upright flat members.
Claim 8
Dependent Claim
29 words
Low-pressure casting apparatus of claim 6 wherein said bridGe means is vertically adjustable by spring loaded clamping bar means adapted to engage and edge of each upright flat member.
Claim 9
Dependent Claim
21 words
Low-pressure casting apparatus of claim 1 which includes conveyer means mounted between said upright flat members and below said bridge means.
Claim 10
Dependent Claim
26 words
Low-pressure casting apparatus of claim 1 which includes grooved coupling means between said tension rods and the core cover plate means of said ingot mold means.
Claim 11
Dependent Claim
58 words
Low-pressure casting apparatus of claim 1 wherein a plurality of fastening elements for the cover means of said holding furnace means are secured to the edge of the opening of said furnace means, each including a bearing bracket and an eccentric pin journaled in the bearing bracket, said pin having a bore containing a horizontally slidable clamping bolt.
Claim 12
Dependent Claim
61 words
Low-pressure casting apparatus of claim 1 wherein said base plate means is secured to the cover means of said holding furnace means by clamping elements disposed adjacent to the longitudinal edges of said base plate means each including a U-shaped clamping member connected to hook elements which engage the underside of the upper rim of the cover means of said furnace.
Claim 13
Dependent Claim
75 words
Low-pressure casting apparatus of claim 1 wherein said ingot mold means includes movable mold parts connected by rod-sleeve joints to the hydraulic actuating means by pins provided on the end face of each hydraulic means and formed with an oblique bore fitted into corresponding apertures of the cross-member of the movable mold parts and the connection is established by respective keys each inserted into a vertical bore in said cross-member and into said oblique bore.
Claim 14
Dependent Claim
86 words
Low-pressure casting apparatus of claim 1 wherein said ingot mold means includes movable mold parts connected to tension rods of hydraulic actuating means by rod-sleeve joints in that those ends of the tension rods which are adjacent the movable mold parts are provided with oblique bores and fitted into suitable apertures in the movable mold parts and the connection is established by respective keys each inserted into a vertical bore in said mold parts and into the oblique bore of the ends of the tension rods.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |