US4306609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for packing granular materials
Assignee: Georg Fischer AG
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Filing: 1979-12-11
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Granted: 1981-12-22
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Expires: 1999-12-11
Abstract
Abstract For packing granular materials, especially foundry moulding materials, by means of an exothermic reaction of a mixture of air and fuel in a combustion chamber (23), a relative movement between the combustible mixture and one or several pulse triggers (19), is produced during the exothermic reaction, preferably by a blower (20) disposed in the combustion chamber (23). Hence the measured amount of sand introduced into a moulding frame (11) and a filling frame (12) over a pattern (6) by means of a sand container (17) is packed to form a mould body.
Inventors
- 👤 Kurt Fischer
- 👤 Robert Steinemann
- 👤 Hans Tanner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:03
CPC Classifications
B; B22; B22C; B22C15/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
66 words
In a process for packing granular materials wherein the granular materials are placed in a closed system and a mixture of air and fuel are ignited to cause the air and fuel to exothermically react and the pressure generated from the reaction compacts said granular materials, the improvement which comprises constantly moving the component with a blower just prior to the initiation of the exothermic reaction.
Claim 2
Dependent Claim
66 words
In a process for packing granular materials wherein the granular materials are placed in a closed system and a mixture of air and fuel are ignited to cause the air and fuel to exothermically react and the pressure generated from the reaction compacts said granular materials, the improvement which comprises constantly moving the component with a blower just prior to the initiation of the exothermic reaction.
Claim 3
Dependent Claim
16 words
The process of claim 1 wherein the ignition is effected by at least one ignition pulse.
Claim 4
Dependent Claim
14 words
The process according to claim 1 or 2 wherein a solid fuel is used.
Claim 5
Dependent Claim
14 words
The process according to claim 1 or 2 wherein a liquid fuel is used.
Claim 6
Dependent Claim
13 words
The process according to claim 1 or 2 wherein gaseous fuel is used.
Claim 7
Dependent Claim
15 words
The process of claim 5 wherein the fuel is a saturated hydrocarbon or mixture thereof.
Claim 8
Dependent Claim
25 words
The process according to claim 1 or 2 wherein the maximum pressure in the closed system, reached after initiation of combustion, is under 8 bar.
Claim 9
Dependent Claim
33 words
The process according to claim 1 or 2 wherein the surface of the granular material to be packed is covered, completely or partially with a gas-impermeable cover before initiation of the exothermic reaction.
Claim 10
Dependent Claim
20 words
The process according to claim 1 or 2 wherein the exothermic reaction is accelerated by means of a catalytic effect.
Claim 11
Independent Claim
121 words
A device for packing granular materials wherein the granular materials are placed in a closed system and a mixture of air and fuel are ignited to cause the air and fuel to exothermically react and the pressure generated from the reaction compacts said granular materials comprising a pattern plate (5) for receiving the granular material to be packed with a moulding-frame (11) and a filling frame (12) disposed thereon and with a cap-shaped combustion chamber (23) connected to it, this chamber having at least one inlet aperture (21) and at least one initial ignition pulse trigger (19), and means (20, 80) for producing a relative movement between the combustible mixture and the initial pulse triggers (19), said means being a blower.
Claim 12
Independent Claim
121 words
A device for packing granular materials wherein the granular materials are placed in a closed system and a mixture of air and fuel are ignited to cause the air and fuel to exothermically react and the pressure generated from the reaction compacts said granular materials comprising a pattern plate (5) for receiving the granular material to be packed with a moulding-frame (11) and a filling frame (12) disposed thereon and with a cap-shaped combustion chamber (23) connected to it, this chamber having at least one inlet aperture (21) and at least one initial ignition pulse trigger (19), and means (20, 80) for producing a relative movement between the combustible mixture and the initial pulse triggers (19), said means being a blower.
Claim 13
Independent Claim
124 words
A device for packing granular materials wherein the granular materials are placed in a closed system and a mixture of air and fuel are ignited to cause the air and fuel to exothermically react and the pressure generated from the reaction compacts said granular materials comprising a pattern plate (5) for receiving the granular material to be packed with a moulding-frame (11) and a filling frame (12) disposed thereon and with a cap-shaped combustion chamber (23) connected to it, this chamber having at least one inlet aperture (21) and at least one initial ignition pulse trigger (19), and means (20, 80) for producing a relative movement between the combustible mixture and the initial pulse triggers (19), said means being a movable ignition pulse trigger.
Claim 14
Independent Claim
124 words
A device for packing granular materials wherein the granular materials are placed in a closed system and a mixture of air and fuel are ignited to cause the air and fuel to exothermically react and the pressure generated from the reaction compacts said granular materials comprising a pattern plate (5) for receiving the granular material to be packed with a moulding-frame (11) and a filling frame (12) disposed thereon and with a cap-shaped combustion chamber (23) connected to it, this chamber having at least one inlet aperture (21) and at least one initial ignition pulse trigger (19), and means (20, 80) for producing a relative movement between the combustible mixture and the initial pulse triggers (19), said means being a movable ignition pulse trigger.
Claim 15
Dependent Claim
11 words
The device of claim 10 wherein the blower is power variable.
Claim 16
Dependent Claim
17 words
The device of claim 10 or 11 wherein the volume of the combustion chamber (23) is variable.
Claim 17
Dependent Claim
57 words
The device of claim 10 or 11 having a container (54) open at the bottom and connectible with the wall (25) of the combustion chamber (23), the open side of the container lying below the granular material filling level (56) and the closed side (55), opposite the open side, lying above the granular material filling level (56).
References Cited (Backward Citations)
US3170202A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-21 | 1985-06-22 | 1985-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-21 | 1989-06-22 | 1989-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-21 | 1993-06-22 | 1993-12-22 | $7700.00 | Window Closed / Lapsed |