Patent US3801020A successfully refreshed from Google Patents.
US3801020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air gun and nozzle therefor
Assignee: SRC LAB
•
Filing: 1972-12-19
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Granted: 1974-04-02
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Expires: 1992-12-19
Abstract
Abstract A nozzle for an air gun to provide an exiting stream of air from a source of pressurized air in which the nozzle has a through passageway and an intersecting slit with the pressure of the exiting stream being higher than in similarly constructed nozzles before reversal of flow occurs by directing the pressurized air through the slit in the direction of the exit and restricting the passageway entrance for the ambient air.
Inventors
- 👤 Z Mocarski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:32
CPC Classifications
B; B05; B05B; B05B1/00; B05B1/005; Y; Y10; Y10S; Y10S239/00; Y10S239/07
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
117 words
A nozzle adaptable for use in an air gun for providing a stream of fluid comprising means forming a through passageway in the nozzle having an open entrance and exit and an intermediate portion therebetween, means forming a slot having one end intersecting the passageway adjacent the entrance and means adapted to connect the inlet of the slot to a source of fluid under pressure, said slot forming means shaping said slot to cause pressurized fluid therethrough to be structurally directed towards the exit and means for restricting the size of the entrance to less than the size of the passageway adjacent the slot, whereby the nozzle may tolerate a higher exit pressure before reversal of flow.
Claim 2
Dependent Claim
117 words
A nozzle adaptable for use in an air gun for providing a stream of fluid comprising means forming a through passageway in the nozzle having an open entrance and exit and an intermediate portion therebetween, means forming a slot having one end intersecting the passageway adjacent the entrance and means adapted to connect the inlet of the slot to a source of fluid under pressure, said slot forming means shaping said slot to cause pressurized fluid therethrough to be structurally directed towards the exit and means for restricting the size of the entrance to less than the size of the passageway adjacent the slot, whereby the nozzle may tolerate a higher exit pressure before reversal of flow.
Claim 3
Dependent Claim
58 words
The invention as defined in claim 1 in which the slot forming means includes a first surface that curves toward the exit from being transverse to the passageway to merge with the passageway and a second surface that is spaced slightly from the first surface and also curves toward the exit with the surfaces being essentially similarly shaped.
Claim 4
Dependent Claim
28 words
The invention as defined in claim 2 in which the curved surfaces maintain at least the same spacing therebetween to obviate a restriction to the flow of fluid.
Claim 5
Dependent Claim
26 words
The invention as defined in claim 3 in which the curved surfaces somewhat diverge to increase the space therebetween as the surfaces curve towards the passageway.
Claim 6
Dependent Claim
30 words
The invention as defined in claim 1 in which the entrance is formed by converging surfacEs that include a portion which has a smaller cross-sectional area than the intermediate portion.
Claim 7
Dependent Claim
18 words
The invention as defined in claim 5 in which the smaller cross-sectional area is located adjacent the slot.
Claim 8
Dependent Claim
20 words
The invention as defined in claim 1 in which the open intersection between the slot and the passageway is annular.
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |