Patent US5877757A successfully refreshed from Google Patents.
US4409166A
Expired / Lapsed
US
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Method of producing fireproof bricks
Assignee: Bucher Guyer AG
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Filing: 1981-04-02
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Granted: 1983-10-11
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Expires: 2001-04-02
Abstract
Abstract A method and an apparatus for the manufacture of bricks with the aid of a mold normally open on top, ceramic material which may be introduced into the mold, and a piston disposed above the mold which may be moved with respect to the mold, and forms a cover surface of the mold when entering the top of the mold, includes the steps of exerting a non-oscillatory pressure by the piston on the ceramic material, and additionally exerting an oscillatory pressure on the ceramic material.
Inventors
- 👤 Willy Vogt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:12
CPC Classifications
F; F15; F15B; F15B21/00; F15B21/14; B; B28; B28B; B28B3/00; B28B3/02; B28B3/022; F15B11/00; F15B11/06; F15B11/072; F15B21/12; F15B2211/00; F15B2211/20; F15B2211/205; F15B2211/20507; F15B2211/20515; F15B2211/30; F15B2211/305; F15B2211/30505; F15B2211/30525; F15B2211/32; F15B2211/327; F15B2211/40; F15B2211/405; F15B2211/40515; F15B2211/42; F15B2211/426; F15B2211/45; F15B2211/50; F15B2211/505; F15B2211/50509; F15B2211/50518; F15B2211/515; F15B2211/5151; F15B2211/55; F15B2211/60; F15B2211/615; F15B2211/63; F15B2211/6303; F15B2211/6306; F15B2211/6309; F15B2211/6336; F15B2211/70; F15B2211/76; F15B2211/80; F15B2211/885; F15B2211/8855
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
86 words
In a method for the manufacture of bricks with the aid of a mold, normally open on top, ceramic material introducible into said mold, and a piston disposed above said mold, movable with respect to said mold, and forming a cover surface of said mold when entering the top of the mold, the steps comprising: exerting a quasi-static pressure by said piston on said ceramic material, and applying a very rapidly increasing impact pressure on said ceramic material, said impact pressure being superimposed upon said piston.
Claim 2
Dependent Claim
86 words
In a method for the manufacture of bricks with the aid of a mold, normally open on top, ceramic material introducible into said mold, and a piston disposed above said mold, movable with respect to said mold, and forming a cover surface of said mold when entering the top of the mold, the steps comprising: exerting a quasi-static pressure by said piston on said ceramic material, and applying a very rapidly increasing impact pressure on said ceramic material, said impact pressure being superimposed upon said piston.
Claim 3
Dependent Claim
35 words
In a method as claimed in claim 1, further comprising the step of exerting said quasi-static pressure only following exertion of said impact pressure, said impact pressure being exerted for initially compressing said ceramic material.
Claim 4
Dependent Claim
21 words
In a method according to claim 1, further comprising the steps of exerting said impact pressure, and said quasi-static pressure simultaneously.
Claim 5
Dependent Claim
23 words
In a method as claimed in claim 1, further comprising the step of generally increasing said quasi-static pressure as a function of time.
Claim 6
Dependent Claim
38 words
In a method as claimed in claim 4, further comprising the steps of interrupting the increase of said quasi-static pressure for a predetermined time and of applying said impact pressure on said ceramic material during said predetermined time.
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) | 1986-10-10 | 1987-04-11 | 1987-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-10 | 1991-04-11 | 1991-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-10 | 1995-04-11 | 1995-10-11 | $7700.00 | Window Closed / Lapsed |