Patent US1424365A successfully refreshed from Google Patents.
US3790085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety nozzle for air blow-guns
Assignee: HIGH PRECISION Inc
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Filing: 1973-02-14
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Granted: 1974-02-05
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Expires: 1993-02-14
Abstract
Abstract An improved safety nozzle for air blow-guns which prevents pressure build-up in the nozzle in case the tip of the nozzle is obstructed in any manner and which also provides protection against possible injuries that could be inflicted by the air vented from the nozzle when such obstruction takes place. The invention is applicable to those guns which prevent pressure build-up by recessing the nozzle tip within an extension of the nozzle so that the tip is inaccessible and by providing radial vent openings in such extension, through which the air can escape when the outer end of the extension is blocked. Auxiliary air jets aligned with the vent openings deflect the air from the vents away from the operator.
Inventors
- 👤 L Ayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:21
CPC Classifications
B; B08; B08B; B08B5/00; B08B5/02; Y; Y10; Y10S; Y10S239/00; Y10S239/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
220 words
In a safety nozzle for air-guns having a bore communicating at one end with the outlet chamber of the air-gun and having a discharge opening at its other end, said bore comprising an inner passage adjacent said outlet chamber and an outer passage extending co-axially therewith at its discharge end, said passages being separated by an inner nozzle tip having an orifice for directing a main stream of air through said outer passage and discharge opening, said outer passage and discharge opening being larger in cross section than the orifice in said inner nozzle tip, said nozzle having a plurality of radially extending vent openings spaced peripherally of said nozzle and disposed downstream of said inner nozzle tip for venting air from said outer passage when said discharge opening is plugged, the improvement comprising: a plurality of peripherally spaced auxiliary-air passages in said nozzle, each communicating directly with the outlet chamber of the air-gun and terminating at its outer end upstream and radially outward of said vent openings, each of said auxiliary-air passages being disposed so as to direct a stream of air directly from the outlet chamber of the air-gun toward one of said vent openings such that air escaping through such vent opening is deflected by such auxiliary-air stream in the direction of flow of said main stream.
Claim 2
Dependent Claim
220 words
In a safety nozzle for air-guns having a bore communicating at one end with the outlet chamber of the air-gun and having a discharge opening at its other end, said bore comprising an inner passage adjacent said outlet chamber and an outer passage extending co-axially therewith at its discharge end, said passages being separated by an inner nozzle tip having an orifice for directing a main stream of air through said outer passage and discharge opening, said outer passage and discharge opening being larger in cross section than the orifice in said inner nozzle tip, said nozzle having a plurality of radially extending vent openings spaced peripherally of said nozzle and disposed downstream of said inner nozzle tip for venting air from said outer passage when said discharge opening is plugged, the improvement comprising: a plurality of peripherally spaced auxiliary-air passages in said nozzle, each communicating directly with the outlet chamber of the air-gun and terminating at its outer end upstream and radially outward of said vent openings, each of said auxiliary-air passages being disposed so as to direct a stream of air directly from the outlet chamber of the air-gun toward one of said vent openings such that air escaping through such vent opening is deflected by such auxiliary-air stream in the direction of flow of said main stream.
Claim 3
Dependent Claim
49 words
The improvement in a safety nozzle for air-guns as defined in claim 1, wherein each of said vent openings comprises a transverse hole disposed adjacent said inner nozzle tip for aspiration of air therethrough during normal operation of the air-gun when the discharge end of said nozzle is open.
Claim 4
Dependent Claim
28 words
The improvement in safety nozzles for air-guns as defined in claim 2, which further includes an outer tip removably mounted at the discharge end of said outer passage.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |