US4641786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nozzle for cryogenic cleaning apparatus
Assignee: Cryoblast Inc
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Filing: 1984-12-14
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Granted: 1987-02-10
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Expires: 2004-12-14
Abstract
Abstract An improved nozzle for a cryogenic cleaning device is provided which includes a demountable member having a constriction which causes shattering of sublimable, cryogenic particles to enhance their abrasiveness.
Inventors
- 👤 David E. Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:23
CPC Classifications
B; B24; B24C; B24C5/00; B24C5/02; B24C5/04; B24C1/00; B24C1/003
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
106 words
A nozzle for directing pellets at a body to be cleaned, said pellets formed of a solid state material which sublimes to a vapor state after impact with the body, comprising: (a) an elongated, demountable, nozzle body having a pellet entrance constriction thereof; (b) a support means for demountably receiving and supporting said nozzle body; (c) means for conveying pellets to said support means for acceleration toward said constriction; (d) said constriction having a limiting passage which is smaller in cross-sectional area than pellets conveyed to said nozzle body whereby said pellets are fractured upon impact with said constriction and are accelerated to a sonic velocity.
Claim 2
Dependent Claim
106 words
A nozzle for directing pellets at a body to be cleaned, said pellets formed of a solid state material which sublimes to a vapor state after impact with the body, comprising: (a) an elongated, demountable, nozzle body having a pellet entrance constriction thereof; (b) a support means for demountably receiving and supporting said nozzle body; (c) means for conveying pellets to said support means for acceleration toward said constriction; (d) said constriction having a limiting passage which is smaller in cross-sectional area than pellets conveyed to said nozzle body whereby said pellets are fractured upon impact with said constriction and are accelerated to a sonic velocity.
Claim 3
Dependent Claim
17 words
The apparatus of claim 1 including means for demountably positioning said nozzle body on said support means.
Claim 4
Dependent Claim
21 words
The apparatus of claim 2 including means for providing an airtight seal between said demountable nozzle body and said support means.
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) | 1990-02-09 | 1990-08-11 | 1991-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-09 | 1994-08-11 | 1995-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-09 | 1998-08-11 | 1999-02-10 | $7700.00 | Window Closed / Lapsed |