US4435199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust system for a vapor deposition chamber
Assignee: AT&T Inc
•
Filing: 1982-04-26
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Granted: 1984-03-06
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Expires: 2002-04-26
Abstract
Abstract An exhaust system (3) for a vapor-phase axial deposition (VAD) system (5) is comprised of the serial combination of an exhaust tube (26), an outlet pipe (27), a soot collection chamber (32) and a discharge line (34). The exhaust tube (26) has a constricted central portion (48) and a flared intake (44) with a gradually turned back end (46).
Inventors
- 👤 Eugene Potkay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:06
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/012; C03B37/014; C03B37/0144; B; B08; B08B; B08B15/00; B08B15/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
126 words
A method of fabricating a lightguide soot-boule in a vapor-phase axial deposition chamber, comprising the steps of: directing a stream of glassy soot, from a soot deposition torch, towards a growing soot-boule, to deposit at least a portion of the soot stream thereon; exhausting undeposited soot from the chamber through a hollow, substantially cylindrical exhaust tube having a constricted central portion with a flared intake and a gradually turned back end projecting into the chamber and an output end connected to an exhaust line; and removing the soot with an extracting means, connected to the exhaust line, having a plurality of tubular members mounted concentrically to provide a circuitous path to exhaust soot to extract particles therefrom while isolating the deposition chamber from downstream pressure fluctuations.
Claim 2
Independent Claim
126 words
A method of fabricating a lightguide soot-boule in a vapor-phase axial deposition chamber, comprising the steps of: directing a stream of glassy soot, from a soot deposition torch, towards a growing soot-boule, to deposit at least a portion of the soot stream thereon; exhausting undeposited soot from the chamber through a hollow, substantially cylindrical exhaust tube having a constricted central portion with a flared intake and a gradually turned back end projecting into the chamber and an output end connected to an exhaust line; and removing the soot with an extracting means, connected to the exhaust line, having a plurality of tubular members mounted concentrically to provide a circuitous path to exhaust soot to extract particles therefrom while isolating the deposition chamber from downstream pressure fluctuations.
Claim 3
Dependent Claim
29 words
The method as set forth in claim 1, comprising; controlling the soot flow and pressure throughout the system with at least one in-line injection venturi in the exhaust line.
Claim 4
Independent Claim
115 words
A system for exhausting soot from a vapor-phase axial deposition system, comprising: a chamber; a soot deposition torch directed into the central portion of the chamber; an exhaust line having first and second ends; a hollow, substantially cylindrical, exhaust tube having a constricted central porton with a flared intake with a gradually turned back end projecting into the chamber and an output end connected to the first end of the exhaust line; and a soot extraction means, connected to the second end of the exhaust line, having a plurality of tubular members mounted concentrically to provide a circuitous path to exhaust soot to extract particles therefrom while isolating the deposition chamber from downstream pressure fluctuations.
Claim 5
Independent Claim
115 words
A system for exhausting soot from a vapor-phase axial deposition system, comprising: a chamber; a soot deposition torch directed into the central portion of the chamber; an exhaust line having first and second ends; a hollow, substantially cylindrical, exhaust tube having a constricted central porton with a flared intake with a gradually turned back end projecting into the chamber and an output end connected to the first end of the exhaust line; and a soot extraction means, connected to the second end of the exhaust line, having a plurality of tubular members mounted concentrically to provide a circuitous path to exhaust soot to extract particles therefrom while isolating the deposition chamber from downstream pressure fluctuations.
Claim 6
Dependent Claim
31 words
The exhaust system as set forth in claim 3, comprising: at least one in-line injection venturi in the exhaust line to cause gas flow through the system while controlling pressures therein.
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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) | 1987-03-06 | 1987-09-05 | 1988-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-06 | 1991-09-05 | 1992-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-06 | 1995-09-05 | 1996-03-06 | $7700.00 | Window Closed / Lapsed |