US3743186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air gun
Assignee: SRC LAB
•
Filing: 1972-03-14
•
Granted: 1973-07-03
•
Expires: 1992-03-14
Abstract
Abstract An air gun for providing a stream of air comprising a hollow tube having an entrance open to the atmosphere, an intermediate throat and an exit with pressurized air being directed through a small slit adjacent the throat to combine with air from the atmosphere and be ejected from the exit as a usable stream. The pressurized air is safely directed from the gun by other than the exit when the exit is closed to prevent a pressure build-up at the exit.
Inventors
- 👤 Z Mocarski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:19
CPC Classifications
B; B05; B05B; B05B1/00; B05B1/005; Y; Y10; Y10S; Y10S239/00; Y10S239/22
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
140 words
An air gun for forming a stream of air comprising a handle, conduit means carried by the handle and including a connection at one end adapted to be connected to a source of compressed air, a nozzle supported on the handle and formed to have a bore with one end being open to form an entrance and the other end being open to form an exit whereby air may pass uninterrupted through the bore, said bore also being formed with a restricted area throat adjacent the entrance, a slit formed in the nozzle and communicating with the bore between the throat and the entrance, means connecting the other end of the conduit means to the slit, and valve means connected to the conduit means for controlling the passage of compressed air through the conduit means and slit into the bore.
Claim 2
Dependent Claim
140 words
An air gun for forming a stream of air comprising a handle, conduit means carried by the handle and including a connection at one end adapted to be connected to a source of compressed air, a nozzle supported on the handle and formed to have a bore with one end being open to form an entrance and the other end being open to form an exit whereby air may pass uninterrupted through the bore, said bore also being formed with a restricted area throat adjacent the entrance, a slit formed in the nozzle and communicating with the bore between the throat and the entrance, means connecting the other end of the conduit means to the slit, and valve means connected to the conduit means for controlling the passage of compressed air through the conduit means and slit into the bore.
Claim 3
Dependent Claim
25 words
The invention as defined in claim 1 in which there are means for dispersing the air passing through the bore upon closure of the exit.
Claim 4
Dependent Claim
39 words
The invention as defined in claim 2 in which the dispersing means includes a shield positioned adjacent the entrance for dispersing the flow of air through the entrance and consisting of a surface on a portion of the handle.
Claim 5
Dependent Claim
25 words
The invention as defined in claim 2 in which the dispersing means includes at least one opening communicating transversely with the bore adjacent the exit.
Claim 6
Dependent Claim
32 words
The invention as defined in claim 1 in which thE nozzle includes at least two parts and the slit is disposed about the bore and located between adjacent surfaces of the parts.
Claim 7
Dependent Claim
16 words
The invention as defined in claim 5 in which the slit is formed to be annular.
Claim 8
Dependent Claim
20 words
The invention as defined in claim 5 in which the slit is formed by a plurality of individual, spaced-apart segments.
Claim 9
Dependent Claim
36 words
The invention as defined in claim 5 in which there is a spacer located between the two parts at their adjacent portions and in which the thickness of the spacer sets the width of the slit.
Claim 10
Dependent Claim
78 words
The invention as defined in claim 1 in which the throat has the narrowest cross-sectional area of the bore nearest the entrance, the slit is formed between a transverse surface that terminates in a cross-sectional area greater than the throat''s cross-sectional area, a curved surface that curves crosswise to lengthwise of the bore along the length of the bore from the entrance towards the exit with the curved surface being located nearer the throat than the transverse surface.
Claim 11
Dependent Claim
50 words
The invention as defined in claim 1 in which there is a reducing tube connected to the exit and having a smaller cross-section than the exit and in which there is a transverse opening communicating with the bore adjacent the exit whereby the stream from the exit may be subdivided.
References Cited (Backward Citations)
CA885892A
Cited
US2965312A
Cited
US3129892A
Cited
US3263934A
Cited
US3419082A
Cited
US3599876A
Cited
US3647142A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |