Patent US3659642A successfully refreshed from Google Patents.
US3659642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for compacting a moulding mixture
Assignee: Individual
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Filing: 1969-12-22
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Granted: 1972-05-02
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Expires: 1989-12-22
Abstract
Abstract A device for compacting a moulding mixture in which the latter is subjected to the action of compressed air by supplying the air into a reservoir under a pressure exceeding 20 kg/cm2 in such an amount that 3 to 40 volumes of air under a normal pressure are provided per unit or volume of the mixture being densified. Then the reservoir is discharged during a time interval not exceeding 0.15 sec. by directing the flow of air into the mixture in a moulding box. The reservoir is formed by a chamber of a housing and at the external side of this housing under a discharge opening closed by a valve there is mounted a plate forming an additional chamber. The plate has holes for a uniform distribution of the air over the surface of the mixture being compacted.
Inventors
- 👤 Lev Fedorovich Vasilkovsky
- 👤 Vladimir Efimovich Sjusjuk
- 👤 Nikoloi Nikitovich Abrosimov
- 👤 Georgy Andreevich Geidebrekhov
- 👤 Vsevolod Andreevich Lyashenko
- 👤 Vladimir Ivanovich Podmogilny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:47
CPC Classifications
B; B22; B22C; B22C15/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
220 words
A device for compacting a moulding mixture comprising a moulding box for the moulding mixture, a housing mountable on the moulding box, said housing having a chamber with a first opening for communication with an air pressure source and a second opening for communication with the moulding box, valve means for controlling the flow of air to and from the chamber via said openings, and a plate mounted externally on said housing between the housing and moulding box and defining an additional chamber with said housing, said plate having holes which open into said additional chamber and said moulding box to provide uniform distribution of air over the entire surface of the mixture in the moulding box when the valve means is in a state in which compressed air flows from the first said chamber to said additional chamber, said valve means comprising a first valve member for opening and closing said second opening, and a second valve member at said first opening to open the same under the pressure of the air from said source to permit the first chamber to be pressurized to a particular value whereupon the second valve member closes said first opening, said first valve member being closed when the second valve member is open and being open when the second valve member is closed.
Claim 2
Independent Claim
220 words
A device for compacting a moulding mixture comprising a moulding box for the moulding mixture, a housing mountable on the moulding box, said housing having a chamber with a first opening for communication with an air pressure source and a second opening for communication with the moulding box, valve means for controlling the flow of air to and from the chamber via said openings, and a plate mounted externally on said housing between the housing and moulding box and defining an additional chamber with said housing, said plate having holes which open into said additional chamber and said moulding box to provide uniform distribution of air over the entire surface of the mixture in the moulding box when the valve means is in a state in which compressed air flows from the first said chamber to said additional chamber, said valve means comprising a first valve member for opening and closing said second opening, and a second valve member at said first opening to open the same under the pressure of the air from said source to permit the first chamber to be pressurized to a particular value whereupon the second valve member closes said first opening, said first valve member being closed when the second valve member is open and being open when the second valve member is closed.
Claim 3
Dependent Claim
100 words
A device as claimed in claim 1, wherein said valve means further comprises a piston rigidly connected to said first valve member, said piston having passages leading from the pressure source towards said first chamber , said second valve member being between said piston and said first valve member in facing relation with said passages to move away therefrom under the pressure of the air from said source to permit the first chamber to be pressurized, said second valve member being displaceable against said piston to block further flow of air through said passages when said first chamber is pressurized.
Claim 4
Dependent Claim
32 words
A device as claimed in claim 1, comprising a conical projection on said plate under said second opening in the housing, said conical projection having an apex which faces said second opening.
Claim 5
Dependent Claim
22 words
A device as claimed in claim 3, wherein said additional chamber has a height which decreases towards the periphery of the 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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |